merge multiple repositories into an existing monorepo

- merged using: 'monorepo_add.sh services-docstore:services/docstore'
- see https://github.com/shopsys/monorepo-tools

services/docstore/.dockerignore

@@ -0,0 +1,7 @@
+node_modules/*
+gitrev
+.git
+.gitignore
+.npm
+.nvmrc
+nodemon.json

services/docstore/.eslintrc

@@ -0,0 +1,86 @@
+// this file was auto-generated, do not edit it directly.
+// instead run bin/update_build_scripts from
+// https://github.com/sharelatex/sharelatex-dev-environment
+{
+  "extends": [
+    "eslint:recommended",
+    "standard",
+    "prettier"
+  ],
+  "parserOptions": {
+    "ecmaVersion": 2018
+  },
+  "plugins": [
+    "mocha",
+    "chai-expect",
+    "chai-friendly"
+  ],
+  "env": {
+    "node": true,
+    "mocha": true
+  },
+  "rules": {
+    // TODO(das7pad): remove overrides after fixing all the violations manually (https://github.com/overleaf/issues/issues/3882#issuecomment-878999671)
+    // START of temporary overrides
+    "array-callback-return": "off",
+    "no-dupe-else-if": "off",
+    "no-var": "off",
+    "no-empty": "off",
+    "node/handle-callback-err": "off",
+    "no-loss-of-precision": "off",
+    "node/no-callback-literal": "off",
+    "node/no-path-concat": "off",
+    "prefer-regex-literals": "off",
+    // END of temporary overrides
+
+    // Swap the no-unused-expressions rule with a more chai-friendly one
+    "no-unused-expressions": 0,
+    "chai-friendly/no-unused-expressions": "error",
+
+    // Do not allow importing of implicit dependencies.
+    "import/no-extraneous-dependencies": "error"
+  },
+  "overrides": [
+    {
+      // Test specific rules
+      "files": ["test/**/*.js"],
+      "globals": {
+        "expect": true
+      },
+      "rules": {
+        // mocha-specific rules
+        "mocha/handle-done-callback": "error",
+        "mocha/no-exclusive-tests": "error",
+        "mocha/no-global-tests": "error",
+        "mocha/no-identical-title": "error",
+        "mocha/no-nested-tests": "error",
+        "mocha/no-pending-tests": "error",
+        "mocha/no-skipped-tests": "error",
+        "mocha/no-mocha-arrows": "error",
+
+        // chai-specific rules
+        "chai-expect/missing-assertion": "error",
+        "chai-expect/terminating-properties": "error",
+
+        // prefer-arrow-callback applies to all callbacks, not just ones in mocha tests.
+        // we don't enforce this at the top-level - just in tests to manage `this` scope
+        // based on mocha's context mechanism
+        "mocha/prefer-arrow-callback": "error"
+      }
+    },
+    {
+      // Backend specific rules
+      "files": ["app/**/*.js", "app.js", "index.js"],
+      "rules": {
+        // don't allow console.log in backend code
+        "no-console": "error",
+
+        // Do not allow importing of implicit dependencies.
+        "import/no-extraneous-dependencies": ["error", {
+          // Do not allow importing of devDependencies.
+          "devDependencies": false
+        }]
+      }
+    }
+  ]
+}

services/docstore/.github/ISSUE_TEMPLATE.md

@@ -0,0 +1,38 @@
+<!-- BUG REPORT TEMPLATE -->
+
+## Steps to Reproduce
+<!-- Describe the steps leading up to when / where you found the bug. -->
+<!-- Screenshots may be helpful here. -->
+
+1.
+2.
+3.
+
+## Expected Behaviour
+<!-- What should have happened when you completed the steps above? -->
+
+## Observed Behaviour
+<!-- What actually happened when you completed the steps above? -->
+<!-- Screenshots may be helpful here. -->
+
+## Context
+<!-- How has this issue affected you? What were you trying to accomplish? -->
+
+## Technical Info
+<!-- Provide any technical details that may be applicable (or N/A if not applicable). -->
+
+* URL:
+* Browser Name and version:
+* Operating System and version (desktop or mobile):
+* Signed in as:
+* Project and/or file:
+
+## Analysis
+<!--- Optionally, document investigation of / suggest a fix for the bug, e.g. 'comes from this line / commit' -->
+
+## Who Needs to Know?
+<!-- If you want to bring this to the attention of particular people, @-mention them below. -->
+<!-- If a user reported this bug and should be notified when it is fixed, provide the Front conversation link. -->
+
+-
+-

services/docstore/.github/PULL_REQUEST_TEMPLATE.md

@@ -0,0 +1,48 @@
+
+<!-- ** This is an Overleaf public repository ** -->
+
+<!-- Please review https://github.com/overleaf/overleaf/blob/master/CONTRIBUTING.md for guidance on what is expected of a contribution. -->
+
+### Description
+
+
+
+#### Screenshots
+
+
+
+#### Related Issues / PRs
+
+
+
+### Review
+
+
+
+#### Potential Impact
+
+
+
+#### Manual Testing Performed
+
+- [ ]
+- [ ]
+
+#### Accessibility
+
+
+
+### Deployment
+
+
+
+#### Deployment Checklist
+
+- [ ] Update documentation not included in the PR (if any)
+- [ ]
+
+#### Metrics and Monitoring
+
+
+
+#### Who Needs to Know?

services/docstore/.github/dependabot.yml

@@ -0,0 +1,23 @@
+version: 2
+updates:
+  - package-ecosystem: "npm"
+    directory: "/"
+    schedule:
+      interval: "daily"
+
+    pull-request-branch-name:
+      # Separate sections of the branch name with a hyphen
+      # Docker images use the branch name and do not support slashes in tags
+      # https://github.com/overleaf/google-ops/issues/822
+      # https://docs.github.com/en/github/administering-a-repository/configuration-options-for-dependency-updates#pull-request-branch-nameseparator
+      separator: "-"
+
+    # Block informal upgrades -- security upgrades use a separate queue.
+    # https://docs.github.com/en/github/administering-a-repository/configuration-options-for-dependency-updates#open-pull-requests-limit
+    open-pull-requests-limit: 0
+
+    # currently assign team-magma to all dependabot PRs - this may change in
+    # future if we reorganise teams
+    labels:
+      - "dependencies"
+      - "type:maintenance"

services/docstore/.gitignore

@@ -0,0 +1,5 @@
+node_modules
+forever
+
+# managed by dev-environment$ bin/update_build_scripts
+.npmrc

services/docstore/.mocharc.json

@@ -0,0 +1,3 @@
+{
+  "require": "test/setup.js"
+}

services/docstore/.nvmrc

@@ -0,0 +1 @@
+12.22.3

services/docstore/.prettierrc

@@ -0,0 +1,11 @@
+# This file was auto-generated, do not edit it directly.
+# Instead run bin/update_build_scripts from
+# https://github.com/sharelatex/sharelatex-dev-environment
+{
+  "arrowParens": "avoid",
+  "semi": false,
+  "singleQuote": true,
+  "trailingComma": "es5",
+  "tabWidth": 2,
+  "useTabs": false
+}

services/docstore/Dockerfile

@@ -0,0 +1,23 @@
+# This file was auto-generated, do not edit it directly.
+# Instead run bin/update_build_scripts from
+# https://github.com/sharelatex/sharelatex-dev-environment
+
+FROM node:12.22.3 as base
+
+WORKDIR /app
+
+FROM base as app
+
+#wildcard as some files may not be in all repos
+COPY package*.json npm-shrink*.json /app/
+
+RUN npm ci --quiet
+
+COPY . /app
+
+FROM base
+
+COPY --from=app /app /app
+USER node
+
+CMD ["node", "--expose-gc", "app.js"]

services/docstore/LICENSE

@@ -0,0 +1,662 @@
+
+                    GNU AFFERO GENERAL PUBLIC LICENSE
+                       Version 3, 19 November 2007
+
+ Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+                            Preamble
+
+  The GNU Affero General Public License is a free, copyleft license for
+software and other kinds of works, specifically designed to ensure
+cooperation with the community in the case of network server software.
+
+  The licenses for most software and other practical works are designed
+to take away your freedom to share and change the works.  By contrast,
+our General Public Licenses are intended to guarantee your freedom to
+share and change all versions of a program--to make sure it remains free
+software for all its users.
+
+  When we speak of free software, we are referring to freedom, not
+price.  Our General Public Licenses are designed to make sure that you
+have the freedom to distribute copies of free software (and charge for
+them if you wish), that you receive source code or can get it if you
+want it, that you can change the software or use pieces of it in new
+free programs, and that you know you can do these things.
+
+  Developers that use our General Public Licenses protect your rights
+with two steps: (1) assert copyright on the software, and (2) offer
+you this License which gives you legal permission to copy, distribute
+and/or modify the software.
+
+  A secondary benefit of defending all users' freedom is that
+improvements made in alternate versions of the program, if they
+receive widespread use, become available for other developers to
+incorporate.  Many developers of free software are heartened and
+encouraged by the resulting cooperation.  However, in the case of
+software used on network servers, this result may fail to come about.
+The GNU General Public License permits making a modified version and
+letting the public access it on a server without ever releasing its
+source code to the public.
+
+  The GNU Affero General Public License is designed specifically to
+ensure that, in such cases, the modified source code becomes available
+to the community.  It requires the operator of a network server to
+provide the source code of the modified version running there to the
+users of that server.  Therefore, public use of a modified version, on
+a publicly accessible server, gives the public access to the source
+code of the modified version.
+
+  An older license, called the Affero General Public License and
+published by Affero, was designed to accomplish similar goals.  This is
+a different license, not a version of the Affero GPL, but Affero has
+released a new version of the Affero GPL which permits relicensing under
+this license.
+
+  The precise terms and conditions for copying, distribution and
+modification follow.
+
+                       TERMS AND CONDITIONS
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+  Termination of your rights under this section does not terminate the
+licenses of parties who have received copies or rights from you under
+this License.  If your rights have been terminated and not permanently
+reinstated, you do not qualify to receive new licenses for the same
+material under section 10.
+
+  9. Acceptance Not Required for Having Copies.
+
+  You are not required to accept this License in order to receive or
+run a copy of the Program.  Ancillary propagation of a covered work
+occurring solely as a consequence of using peer-to-peer transmission
+to receive a copy likewise does not require acceptance.  However,
+nothing other than this License grants you permission to propagate or
+modify any covered work.  These actions infringe copyright if you do
+not accept this License.  Therefore, by modifying or propagating a
+covered work, you indicate your acceptance of this License to do so.
+
+  10. Automatic Licensing of Downstream Recipients.
+
+  Each time you convey a covered work, the recipient automatically
+receives a license from the original licensors, to run, modify and
+propagate that work, subject to this License.  You are not responsible
+for enforcing compliance by third parties with this License.
+
+  An "entity transaction" is a transaction transferring control of an
+organization, or substantially all assets of one, or subdividing an
+organization, or merging organizations.  If propagation of a covered
+work results from an entity transaction, each party to that
+transaction who receives a copy of the work also receives whatever
+licenses to the work the party's predecessor in interest had or could
+give under the previous paragraph, plus a right to possession of the
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+the predecessor has it or can get it with reasonable efforts.
+
+  You may not impose any further restrictions on the exercise of the
+rights granted or affirmed under this License.  For example, you may
+not impose a license fee, royalty, or other charge for exercise of
+rights granted under this License, and you may not initiate litigation
+(including a cross-claim or counterclaim in a lawsuit) alleging that
+any patent claim is infringed by making, using, selling, offering for
+sale, or importing the Program or any portion of it.
+
+  11. Patents.
+
+  A "contributor" is a copyright holder who authorizes use under this
+License of the Program or a work on which the Program is based.  The
+work thus licensed is called the contributor's "contributor version".
+
+  A contributor's "essential patent claims" are all patent claims
+owned or controlled by the contributor, whether already acquired or
+hereafter acquired, that would be infringed by some manner, permitted
+by this License, of making, using, or selling its contributor version,
+but do not include claims that would be infringed only as a
+consequence of further modification of the contributor version.  For
+purposes of this definition, "control" includes the right to grant
+patent sublicenses in a manner consistent with the requirements of
+this License.
+
+  Each contributor grants you a non-exclusive, worldwide, royalty-free
+patent license under the contributor's essential patent claims, to
+make, use, sell, offer for sale, import and otherwise run, modify and
+propagate the contents of its contributor version.
+
+  In the following three paragraphs, a "patent license" is any express
+agreement or commitment, however denominated, not to enforce a patent
+(such as an express permission to practice a patent or covenant not to
+sue for patent infringement).  To "grant" such a patent license to a
+party means to make such an agreement or commitment not to enforce a
+patent against the party.
+
+  If you convey a covered work, knowingly relying on a patent license,
+and the Corresponding Source of the work is not available for anyone
+to copy, free of charge and under the terms of this License, through a
+publicly available network server or other readily accessible means,
+then you must either (1) cause the Corresponding Source to be so
+available, or (2) arrange to deprive yourself of the benefit of the
+patent license for this particular work, or (3) arrange, in a manner
+consistent with the requirements of this License, to extend the patent
+license to downstream recipients.  "Knowingly relying" means you have
+actual knowledge that, but for the patent license, your conveying the
+covered work in a country, or your recipient's use of the covered work
+in a country, would infringe one or more identifiable patents in that
+country that you have reason to believe are valid.
+
+  If, pursuant to or in connection with a single transaction or
+arrangement, you convey, or propagate by procuring conveyance of, a
+covered work, and grant a patent license to some of the parties
+receiving the covered work authorizing them to use, propagate, modify
+or convey a specific copy of the covered work, then the patent license
+you grant is automatically extended to all recipients of the covered
+work and works based on it.
+
+  A patent license is "discriminatory" if it does not include within
+the scope of its coverage, prohibits the exercise of, or is
+conditioned on the non-exercise of one or more of the rights that are
+specifically granted under this License.  You may not convey a covered
+work if you are a party to an arrangement with a third party that is
+in the business of distributing software, under which you make payment
+to the third party based on the extent of your activity of conveying
+the work, and under which the third party grants, to any of the
+parties who would receive the covered work from you, a discriminatory
+patent license (a) in connection with copies of the covered work
+conveyed by you (or copies made from those copies), or (b) primarily
+for and in connection with specific products or compilations that
+contain the covered work, unless you entered into that arrangement,
+or that patent license was granted, prior to 28 March 2007.
+
+  Nothing in this License shall be construed as excluding or limiting
+any implied license or other defenses to infringement that may
+otherwise be available to you under applicable patent law.
+
+  12. No Surrender of Others' Freedom.
+
+  If conditions are imposed on you (whether by court order, agreement or
+otherwise) that contradict the conditions of this License, they do not
+excuse you from the conditions of this License.  If you cannot convey a
+covered work so as to satisfy simultaneously your obligations under this
+License and any other pertinent obligations, then as a consequence you may
+not convey it at all.  For example, if you agree to terms that obligate you
+to collect a royalty for further conveying from those to whom you convey
+the Program, the only way you could satisfy both those terms and this
+License would be to refrain entirely from conveying the Program.
+
+  13. Remote Network Interaction; Use with the GNU General Public License.
+
+  Notwithstanding any other provision of this License, if you modify the
+Program, your modified version must prominently offer all users
+interacting with it remotely through a computer network (if your version
+supports such interaction) an opportunity to receive the Corresponding
+Source of your version by providing access to the Corresponding Source
+from a network server at no charge, through some standard or customary
+means of facilitating copying of software.  This Corresponding Source
+shall include the Corresponding Source for any work covered by version 3
+of the GNU General Public License that is incorporated pursuant to the
+following paragraph.
+
+  Notwithstanding any other provision of this License, you have
+permission to link or combine any covered work with a work licensed
+under version 3 of the GNU General Public License into a single
+combined work, and to convey the resulting work.  The terms of this
+License will continue to apply to the part which is the covered work,
+but the work with which it is combined will remain governed by version
+3 of the GNU General Public License.
+
+  14. Revised Versions of this License.
+
+  The Free Software Foundation may publish revised and/or new versions of
+the GNU Affero General Public License from time to time.  Such new versions
+will be similar in spirit to the present version, but may differ in detail to
+address new problems or concerns.
+
+  Each version is given a distinguishing version number.  If the
+Program specifies that a certain numbered version of the GNU Affero General
+Public License "or any later version" applies to it, you have the
+option of following the terms and conditions either of that numbered
+version or of any later version published by the Free Software
+Foundation.  If the Program does not specify a version number of the
+GNU Affero General Public License, you may choose any version ever published
+by the Free Software Foundation.
+
+  If the Program specifies that a proxy can decide which future
+versions of the GNU Affero General Public License can be used, that proxy's
+public statement of acceptance of a version permanently authorizes you
+to choose that version for the Program.
+
+  Later license versions may give you additional or different
+permissions.  However, no additional obligations are imposed on any
+author or copyright holder as a result of your choosing to follow a
+later version.
+
+  15. Disclaimer of Warranty.
+
+  THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
+APPLICABLE LAW.  EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
+HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
+OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
+THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+PURPOSE.  THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
+IS WITH YOU.  SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
+ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
+
+  16. Limitation of Liability.
+
+  IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
+THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
+GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
+USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
+DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
+PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
+EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGES.
+
+  17. Interpretation of Sections 15 and 16.
+
+  If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+                     END OF TERMS AND CONDITIONS
+
+            How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Affero General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU Affero General Public License for more details.
+
+    You should have received a copy of the GNU Affero General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+  If your software can interact with users remotely through a computer
+network, you should also make sure that it provides a way for users to
+get its source.  For example, if your program is a web application, its
+interface could display a "Source" link that leads users to an archive
+of the code.  There are many ways you could offer source, and different
+solutions will be better for different programs; see section 13 for the
+specific requirements.
+
+  You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU AGPL, see
+<http://www.gnu.org/licenses/>.

services/docstore/Makefile

@@ -0,0 +1,90 @@
+# This file was auto-generated, do not edit it directly.
+# Instead run bin/update_build_scripts from
+# https://github.com/sharelatex/sharelatex-dev-environment
+
+BUILD_NUMBER ?= local
+BRANCH_NAME ?= $(shell git rev-parse --abbrev-ref HEAD)
+PROJECT_NAME = docstore
+BUILD_DIR_NAME = $(shell pwd | xargs basename | tr -cd '[a-zA-Z0-9_.\-]')
+
+DOCKER_COMPOSE_FLAGS ?= -f docker-compose.yml
+DOCKER_COMPOSE := BUILD_NUMBER=$(BUILD_NUMBER) \
+	BRANCH_NAME=$(BRANCH_NAME) \
+	PROJECT_NAME=$(PROJECT_NAME) \
+	MOCHA_GREP=${MOCHA_GREP} \
+	docker-compose ${DOCKER_COMPOSE_FLAGS}
+
+DOCKER_COMPOSE_TEST_ACCEPTANCE = \
+	COMPOSE_PROJECT_NAME=test_acceptance_$(BUILD_DIR_NAME) $(DOCKER_COMPOSE)
+
+DOCKER_COMPOSE_TEST_UNIT = \
+	COMPOSE_PROJECT_NAME=test_unit_$(BUILD_DIR_NAME) $(DOCKER_COMPOSE)
+
+clean:
+	-docker rmi ci/$(PROJECT_NAME):$(BRANCH_NAME)-$(BUILD_NUMBER)
+	-docker rmi gcr.io/overleaf-ops/$(PROJECT_NAME):$(BRANCH_NAME)-$(BUILD_NUMBER)
+	-$(DOCKER_COMPOSE_TEST_UNIT) down --rmi local
+	-$(DOCKER_COMPOSE_TEST_ACCEPTANCE) down --rmi local
+
+format:
+	$(DOCKER_COMPOSE) run --rm test_unit npm run --silent format
+
+format_fix:
+	$(DOCKER_COMPOSE) run --rm test_unit npm run --silent format:fix
+
+lint:
+	$(DOCKER_COMPOSE) run --rm test_unit npm run --silent lint
+
+test: format lint test_unit test_acceptance
+
+test_unit:
+ifneq (,$(wildcard test/unit))
+	$(DOCKER_COMPOSE_TEST_UNIT) run --rm test_unit
+	$(MAKE) test_unit_clean
+endif
+
+test_clean: test_unit_clean
+test_unit_clean:
+ifneq (,$(wildcard test/unit))
+	$(DOCKER_COMPOSE_TEST_UNIT) down -v -t 0
+endif
+
+test_acceptance: test_acceptance_clean test_acceptance_pre_run test_acceptance_run
+	$(MAKE) test_acceptance_clean
+
+test_acceptance_debug: test_acceptance_clean test_acceptance_pre_run test_acceptance_run_debug
+	$(MAKE) test_acceptance_clean
+
+test_acceptance_run:
+ifneq (,$(wildcard test/acceptance))
+	$(DOCKER_COMPOSE_TEST_ACCEPTANCE) run --rm test_acceptance
+endif
+
+test_acceptance_run_debug:
+ifneq (,$(wildcard test/acceptance))
+	$(DOCKER_COMPOSE_TEST_ACCEPTANCE) run -p 127.0.0.9:19999:19999 --rm test_acceptance npm run test:acceptance -- --inspect=0.0.0.0:19999 --inspect-brk
+endif
+
+test_clean: test_acceptance_clean
+test_acceptance_clean:
+	$(DOCKER_COMPOSE_TEST_ACCEPTANCE) down -v -t 0
+
+test_acceptance_pre_run:
+ifneq (,$(wildcard test/acceptance/js/scripts/pre-run))
+	$(DOCKER_COMPOSE_TEST_ACCEPTANCE) run --rm test_acceptance test/acceptance/js/scripts/pre-run
+endif
+
+build:
+	docker build --pull --tag ci/$(PROJECT_NAME):$(BRANCH_NAME)-$(BUILD_NUMBER) \
+		--tag gcr.io/overleaf-ops/$(PROJECT_NAME):$(BRANCH_NAME)-$(BUILD_NUMBER) \
+		.
+
+tar:
+	$(DOCKER_COMPOSE) up tar
+
+publish:
+
+	docker push $(DOCKER_REPO)/$(PROJECT_NAME):$(BRANCH_NAME)-$(BUILD_NUMBER)
+
+
+.PHONY: clean test test_unit test_acceptance test_clean build publish

services/docstore/README.md

@@ -0,0 +1,11 @@
+overleaf/docstore
+===================
+
+A CRUD API for storing and updating text documents in projects
+
+License
+-------
+
+The code in this repository is released under the GNU AFFERO GENERAL PUBLIC LICENSE, version 3. A copy can be found in the `LICENSE` file.
+
+Copyright (c) Overleaf, 2014-2019.

services/docstore/app.js

@@ -0,0 +1,123 @@
+/*
+ * decaffeinate suggestions:
+ * DS102: Remove unnecessary code created because of implicit returns
+ * DS207: Consider shorter variations of null checks
+ * Full docs: https://github.com/decaffeinate/decaffeinate/blob/master/docs/suggestions.md
+ */
+const Metrics = require('@overleaf/metrics')
+Metrics.initialize('docstore')
+const Settings = require('@overleaf/settings')
+const logger = require('logger-sharelatex')
+const express = require('express')
+const bodyParser = require('body-parser')
+const {
+  celebrate: validate,
+  Joi,
+  errors: handleValidationErrors,
+} = require('celebrate')
+const mongodb = require('./app/js/mongodb')
+const Errors = require('./app/js/Errors')
+const HttpController = require('./app/js/HttpController')
+
+logger.initialize('docstore')
+if (Metrics.event_loop != null) {
+  Metrics.event_loop.monitor(logger)
+}
+
+const app = express()
+
+app.use(Metrics.http.monitor(logger))
+
+Metrics.injectMetricsRoute(app)
+
+app.param('project_id', function (req, res, next, projectId) {
+  if (projectId != null ? projectId.match(/^[0-9a-f]{24}$/) : undefined) {
+    return next()
+  } else {
+    return next(new Error('invalid project id'))
+  }
+})
+
+app.param('doc_id', function (req, res, next, docId) {
+  if (docId != null ? docId.match(/^[0-9a-f]{24}$/) : undefined) {
+    return next()
+  } else {
+    return next(new Error('invalid doc id'))
+  }
+})
+
+Metrics.injectMetricsRoute(app)
+
+app.get('/project/:project_id/doc-deleted', HttpController.getAllDeletedDocs)
+app.get('/project/:project_id/doc', HttpController.getAllDocs)
+app.get('/project/:project_id/ranges', HttpController.getAllRanges)
+app.get('/project/:project_id/doc/:doc_id', HttpController.getDoc)
+app.get('/project/:project_id/doc/:doc_id/deleted', HttpController.isDocDeleted)
+app.get('/project/:project_id/doc/:doc_id/raw', HttpController.getRawDoc)
+app.get('/project/:project_id/doc/:doc_id/peek', HttpController.peekDoc)
+// Add 64kb overhead for the JSON encoding, and double the size to allow for ranges in the json payload
+app.post(
+  '/project/:project_id/doc/:doc_id',
+  bodyParser.json({ limit: (Settings.max_doc_length + 64 * 1024) * 2 }),
+  HttpController.updateDoc
+)
+app.patch(
+  '/project/:project_id/doc/:doc_id',
+  bodyParser.json(),
+  validate({
+    body: {
+      deleted: Joi.boolean(),
+      name: Joi.string().when('deleted', { is: true, then: Joi.required() }),
+      deletedAt: Joi.date().when('deleted', { is: true, then: Joi.required() }),
+    },
+  }),
+  HttpController.patchDoc
+)
+app.delete('/project/:project_id/doc/:doc_id', (req, res) => {
+  res.status(500).send('DELETE-ing a doc is DEPRECATED. PATCH the doc instead.')
+})
+
+app.post('/project/:project_id/archive', HttpController.archiveAllDocs)
+app.post('/project/:project_id/doc/:doc_id/archive', HttpController.archiveDoc)
+app.post('/project/:project_id/unarchive', HttpController.unArchiveAllDocs)
+app.post('/project/:project_id/destroy', HttpController.destroyAllDocs)
+
+app.get('/health_check', HttpController.healthCheck)
+
+app.get('/status', (req, res) => res.send('docstore is alive'))
+
+app.use(handleValidationErrors())
+app.use(function (error, req, res, next) {
+  logger.error({ err: error, req }, 'request errored')
+  if (error instanceof Errors.NotFoundError) {
+    return res.sendStatus(404)
+  } else if (error instanceof Errors.DocModifiedError) {
+    return res.sendStatus(409)
+  } else {
+    return res.status(500).send('Oops, something went wrong')
+  }
+})
+
+const { port } = Settings.internal.docstore
+const { host } = Settings.internal.docstore
+
+if (!module.parent) {
+  // Called directly
+  mongodb
+    .waitForDb()
+    .then(() => {
+      app.listen(port, host, function (err) {
+        if (err) {
+          logger.fatal({ err }, `Cannot bind to ${host}:${port}. Exiting.`)
+          process.exit(1)
+        }
+        return logger.info(`Docstore starting up, listening on ${host}:${port}`)
+      })
+    })
+    .catch(err => {
+      logger.fatal({ err }, 'Cannot connect to mongo. Exiting.')
+      process.exit(1)
+    })
+}
+
+module.exports = app

services/docstore/app/js/DocArchiveManager.js

@@ -0,0 +1,261 @@
+const { callbackify } = require('util')
+const MongoManager = require('./MongoManager').promises
+const Errors = require('./Errors')
+const logger = require('logger-sharelatex')
+const settings = require('@overleaf/settings')
+const crypto = require('crypto')
+const Streamifier = require('streamifier')
+const RangeManager = require('./RangeManager')
+const PersistorManager = require('./PersistorManager')
+const pMap = require('p-map')
+
+const PARALLEL_JOBS = settings.parallelArchiveJobs
+const ARCHIVE_BATCH_SIZE = settings.archiveBatchSize
+const UN_ARCHIVE_BATCH_SIZE = settings.unArchiveBatchSize
+const DESTROY_BATCH_SIZE = settings.destroyBatchSize
+const DESTROY_RETRY_COUNT = settings.destroyRetryCount
+
+module.exports = {
+  archiveAllDocs: callbackify(archiveAllDocs),
+  archiveDocById: callbackify(archiveDocById),
+  archiveDoc: callbackify(archiveDoc),
+  unArchiveAllDocs: callbackify(unArchiveAllDocs),
+  unarchiveDoc: callbackify(unarchiveDoc),
+  destroyAllDocs: callbackify(destroyAllDocs),
+  destroyDoc: callbackify(destroyDoc),
+  getDoc: callbackify(getDoc),
+  promises: {
+    archiveAllDocs,
+    archiveDocById,
+    archiveDoc,
+    unArchiveAllDocs,
+    unarchiveDoc,
+    destroyAllDocs,
+    destroyDoc,
+    getDoc,
+  },
+}
+
+async function archiveAllDocs(projectId) {
+  while (true) {
+    const docs = await MongoManager.getNonArchivedProjectDocs(
+      projectId,
+      ARCHIVE_BATCH_SIZE
+    )
+    if (!docs || docs.length === 0) {
+      break
+    }
+
+    await pMap(docs, doc => archiveDoc(projectId, doc), {
+      concurrency: PARALLEL_JOBS,
+    })
+  }
+}
+
+async function archiveDocById(projectId, docId) {
+  const doc = await MongoManager.findDoc(projectId, docId, {
+    lines: true,
+    ranges: true,
+    rev: true,
+    inS3: true,
+  })
+
+  if (!doc) {
+    throw new Errors.NotFoundError(
+      `Cannot find doc ${docId} in project ${projectId}`
+    )
+  }
+
+  // TODO(das7pad): consider refactoring MongoManager.findDoc to take a query
+  if (doc.inS3) return
+  return archiveDoc(projectId, doc)
+}
+
+async function archiveDoc(projectId, doc) {
+  logger.log(
+    { project_id: projectId, doc_id: doc._id },
+    'sending doc to persistor'
+  )
+  const key = `${projectId}/${doc._id}`
+
+  if (doc.lines == null) {
+    throw new Error('doc has no lines')
+  }
+
+  const json = JSON.stringify({
+    lines: doc.lines,
+    ranges: doc.ranges,
+    schema_v: 1,
+  })
+
+  // this should never happen, but protects against memory-corruption errors that
+  // have happened in the past
+  if (json.indexOf('\u0000') > -1) {
+    const error = new Error('null bytes detected')
+    logger.err({ err: error, doc }, error.message)
+    throw error
+  }
+
+  const md5 = crypto.createHash('md5').update(json).digest('hex')
+  const stream = Streamifier.createReadStream(json)
+  await PersistorManager.sendStream(settings.docstore.bucket, key, stream, {
+    sourceMd5: md5,
+  })
+  await MongoManager.markDocAsArchived(doc._id, doc.rev)
+}
+
+async function unArchiveAllDocs(projectId) {
+  while (true) {
+    let docs
+    if (settings.docstore.keepSoftDeletedDocsArchived) {
+      docs = await MongoManager.getNonDeletedArchivedProjectDocs(
+        projectId,
+        UN_ARCHIVE_BATCH_SIZE
+      )
+    } else {
+      docs = await MongoManager.getArchivedProjectDocs(
+        projectId,
+        UN_ARCHIVE_BATCH_SIZE
+      )
+    }
+    if (!docs || docs.length === 0) {
+      break
+    }
+    await pMap(docs, doc => unarchiveDoc(projectId, doc._id), {
+      concurrency: PARALLEL_JOBS,
+    })
+  }
+}
+
+// get the doc from the PersistorManager without storing it in mongo
+async function getDoc(projectId, docId) {
+  const key = `${projectId}/${docId}`
+  const sourceMd5 = await PersistorManager.getObjectMd5Hash(
+    settings.docstore.bucket,
+    key
+  )
+  const stream = await PersistorManager.getObjectStream(
+    settings.docstore.bucket,
+    key
+  )
+  stream.resume()
+  const json = await _streamToString(stream)
+  const md5 = crypto.createHash('md5').update(json).digest('hex')
+  if (sourceMd5 !== md5) {
+    throw new Errors.Md5MismatchError('md5 mismatch when downloading doc', {
+      key,
+      sourceMd5,
+      md5,
+    })
+  }
+
+  const doc = JSON.parse(json)
+
+  const mongoDoc = {}
+  if (doc.schema_v === 1 && doc.lines != null) {
+    mongoDoc.lines = doc.lines
+    if (doc.ranges != null) {
+      mongoDoc.ranges = RangeManager.jsonRangesToMongo(doc.ranges)
+    }
+  } else if (Array.isArray(doc)) {
+    mongoDoc.lines = doc
+  } else {
+    throw new Error("I don't understand the doc format in s3")
+  }
+
+  return mongoDoc
+}
+
+// get the doc and unarchive it to mongo
+async function unarchiveDoc(projectId, docId) {
+  logger.log(
+    { project_id: projectId, doc_id: docId },
+    'getting doc from persistor'
+  )
+  const key = `${projectId}/${docId}`
+  const originalDoc = await MongoManager.findDoc(projectId, docId, { inS3: 1 })
+  if (!originalDoc.inS3) {
+    // return if it's not actually in S3 as there's nothing to do
+    return
+  }
+  let mongoDoc
+  try {
+    mongoDoc = await getDoc(projectId, docId)
+  } catch (err) {
+    // if we get a 404, we could be in a race and something else has unarchived the doc already
+    if (err instanceof Errors.NotFoundError) {
+      const doc = await MongoManager.findDoc(projectId, docId, { inS3: 1 })
+      if (!doc.inS3) {
+        // the doc has been archived while we were looking for it, so no error
+        return
+      }
+    }
+    throw err
+  }
+  await MongoManager.upsertIntoDocCollection(projectId, docId, mongoDoc)
+  await PersistorManager.deleteObject(settings.docstore.bucket, key)
+}
+
+async function destroyAllDocs(projectId) {
+  while (true) {
+    const docs = await MongoManager.getProjectsDocs(
+      projectId,
+      { include_deleted: true, limit: DESTROY_BATCH_SIZE },
+      { _id: 1 }
+    )
+    if (!docs || docs.length === 0) {
+      break
+    }
+    await pMap(docs, doc => destroyDoc(projectId, doc._id), {
+      concurrency: PARALLEL_JOBS,
+    })
+  }
+}
+
+async function destroyDoc(projectId, docId) {
+  logger.log(
+    { project_id: projectId, doc_id: docId },
+    'removing doc from mongo and persistor'
+  )
+  const doc = await MongoManager.findDoc(projectId, docId, {
+    inS3: 1,
+  })
+  if (!doc) {
+    throw new Errors.NotFoundError('Doc not found in Mongo')
+  }
+
+  if (doc.inS3) {
+    await destroyArchiveWithRetry(projectId, docId)
+  }
+  await MongoManager.destroyDoc(docId)
+}
+
+async function destroyArchiveWithRetry(projectId, docId) {
+  let attempt = 0
+  let lastError
+  while (attempt++ <= DESTROY_RETRY_COUNT) {
+    try {
+      await PersistorManager.deleteObject(
+        settings.docstore.bucket,
+        `${projectId}/${docId}`
+      )
+      return
+    } catch (err) {
+      lastError = err
+      logger.warn(
+        { projectId, docId, err, attempt },
+        'destroying archive failed'
+      )
+    }
+  }
+  throw lastError
+}
+
+async function _streamToString(stream) {
+  const chunks = []
+  return new Promise((resolve, reject) => {
+    stream.on('data', chunk => chunks.push(chunk))
+    stream.on('error', reject)
+    stream.on('end', () => resolve(Buffer.concat(chunks).toString('utf8')))
+  })
+}

services/docstore/app/js/DocManager.js

@@ -0,0 +1,378 @@
+/* eslint-disable
+    camelcase,
+    handle-callback-err,
+    no-dupe-keys,
+    no-undef,
+*/
+// TODO: This file was created by bulk-decaffeinate.
+// Fix any style issues and re-enable lint.
+/*
+ * decaffeinate suggestions:
+ * DS102: Remove unnecessary code created because of implicit returns
+ * DS207: Consider shorter variations of null checks
+ * Full docs: https://github.com/decaffeinate/decaffeinate/blob/master/docs/suggestions.md
+ */
+let DocManager
+const MongoManager = require('./MongoManager')
+const Errors = require('./Errors')
+const logger = require('logger-sharelatex')
+const _ = require('underscore')
+const DocArchive = require('./DocArchiveManager')
+const RangeManager = require('./RangeManager')
+const Settings = require('@overleaf/settings')
+
+module.exports = DocManager = {
+  // TODO: For historical reasons, the doc version is currently stored in the docOps
+  // collection (which is all that this collection contains). In future, we should
+  // migrate this version property to be part of the docs collection, to guarantee
+  // consitency between lines and version when writing/reading, and for a simpler schema.
+  _getDoc(project_id, doc_id, filter, callback) {
+    if (filter == null) {
+      filter = {}
+    }
+    if (callback == null) {
+      callback = function (error, doc) {}
+    }
+    if (filter.inS3 !== true) {
+      return callback('must include inS3 when getting doc')
+    }
+
+    return MongoManager.findDoc(
+      project_id,
+      doc_id,
+      filter,
+      function (err, doc) {
+        if (err != null) {
+          return callback(err)
+        } else if (doc == null) {
+          return callback(
+            new Errors.NotFoundError(
+              `No such doc: ${doc_id} in project ${project_id}`
+            )
+          )
+        } else if (doc != null ? doc.inS3 : undefined) {
+          return DocArchive.unarchiveDoc(project_id, doc_id, function (err) {
+            if (err != null) {
+              logger.err({ err, project_id, doc_id }, 'error unarchiving doc')
+              return callback(err)
+            }
+            return DocManager._getDoc(project_id, doc_id, filter, callback)
+          })
+        } else {
+          if (filter.version) {
+            return MongoManager.getDocVersion(
+              doc_id,
+              function (error, version) {
+                if (error != null) {
+                  return callback(error)
+                }
+                doc.version = version
+                return callback(err, doc)
+              }
+            )
+          } else {
+            return callback(err, doc)
+          }
+        }
+      }
+    )
+  },
+
+  isDocDeleted(projectId, docId, callback) {
+    MongoManager.findDoc(
+      projectId,
+      docId,
+      { deleted: true },
+      function (err, doc) {
+        if (err) {
+          return callback(err)
+        }
+        if (!doc) {
+          return callback(
+            new Errors.NotFoundError(
+              `No such project/doc: ${projectId}/${docId}`
+            )
+          )
+        }
+        // `doc.deleted` is `undefined` for non deleted docs
+        callback(null, Boolean(doc.deleted))
+      }
+    )
+  },
+
+  getFullDoc(project_id, doc_id, callback) {
+    if (callback == null) {
+      callback = function (err, doc) {}
+    }
+    return DocManager._getDoc(
+      project_id,
+      doc_id,
+      {
+        lines: true,
+        rev: true,
+        deleted: true,
+        version: true,
+        ranges: true,
+        inS3: true,
+      },
+      function (err, doc) {
+        if (err != null) {
+          return callback(err)
+        }
+        return callback(err, doc)
+      }
+    )
+  },
+
+  // returns the doc without any version information
+  _peekRawDoc(project_id, doc_id, callback) {
+    MongoManager.findDoc(
+      project_id,
+      doc_id,
+      {
+        lines: true,
+        rev: true,
+        deleted: true,
+        version: true,
+        ranges: true,
+        inS3: true,
+      },
+      (err, doc) => {
+        if (err) return callback(err)
+        if (doc == null) {
+          return callback(
+            new Errors.NotFoundError(
+              `No such doc: ${doc_id} in project ${project_id}`
+            )
+          )
+        }
+        if (doc && !doc.inS3) {
+          return callback(null, doc)
+        }
+        // skip the unarchiving to mongo when getting a doc
+        DocArchive.getDoc(project_id, doc_id, function (err, archivedDoc) {
+          if (err != null) {
+            logger.err(
+              { err, project_id, doc_id },
+              'error getting doc from archive'
+            )
+            return callback(err)
+          }
+          doc = _.extend(doc, archivedDoc)
+          callback(null, doc)
+        })
+      }
+    )
+  },
+
+  // get the doc from mongo if possible, or from the persistent store otherwise,
+  // without unarchiving it (avoids unnecessary writes to mongo)
+  peekDoc(project_id, doc_id, callback) {
+    DocManager._peekRawDoc(project_id, doc_id, (err, doc) => {
+      if (err) {
+        return callback(err)
+      }
+      MongoManager.withRevCheck(
+        doc,
+        MongoManager.getDocVersion,
+        function (error, version) {
+          // If the doc has been modified while we were retrieving it, we
+          // will get a DocModified error
+          if (error != null) {
+            return callback(error)
+          }
+          doc.version = version
+          return callback(err, doc)
+        }
+      )
+    })
+  },
+
+  getDocLines(project_id, doc_id, callback) {
+    if (callback == null) {
+      callback = function (err, doc) {}
+    }
+    return DocManager._getDoc(
+      project_id,
+      doc_id,
+      { lines: true, inS3: true },
+      function (err, doc) {
+        if (err != null) {
+          return callback(err)
+        }
+        return callback(err, doc)
+      }
+    )
+  },
+
+  getAllDeletedDocs(project_id, filter, callback) {
+    MongoManager.getProjectsDeletedDocs(project_id, filter, callback)
+  },
+
+  getAllNonDeletedDocs(project_id, filter, callback) {
+    if (callback == null) {
+      callback = function (error, docs) {}
+    }
+    return DocArchive.unArchiveAllDocs(project_id, function (error) {
+      if (error != null) {
+        return callback(error)
+      }
+      return MongoManager.getProjectsDocs(
+        project_id,
+        { include_deleted: false },
+        filter,
+        function (error, docs) {
+          if (typeof err !== 'undefined' && err !== null) {
+            return callback(error)
+          } else if (docs == null) {
+            return callback(
+              new Errors.NotFoundError(`No docs for project ${project_id}`)
+            )
+          } else {
+            return callback(null, docs)
+          }
+        }
+      )
+    })
+  },
+
+  updateDoc(project_id, doc_id, lines, version, ranges, callback) {
+    if (callback == null) {
+      callback = function (error, modified, rev) {}
+    }
+    if (lines == null || version == null || ranges == null) {
+      return callback(new Error('no lines, version or ranges provided'))
+    }
+
+    return DocManager._getDoc(
+      project_id,
+      doc_id,
+      {
+        version: true,
+        rev: true,
+        lines: true,
+        version: true,
+        ranges: true,
+        inS3: true,
+      },
+      function (err, doc) {
+        let updateLines, updateRanges, updateVersion
+        if (err != null && !(err instanceof Errors.NotFoundError)) {
+          logger.err(
+            { project_id, doc_id, err },
+            'error getting document for update'
+          )
+          return callback(err)
+        }
+
+        ranges = RangeManager.jsonRangesToMongo(ranges)
+
+        if (doc == null) {
+          // If the document doesn't exist, we'll make sure to create/update all parts of it.
+          updateLines = true
+          updateVersion = true
+          updateRanges = true
+        } else {
+          updateLines = !_.isEqual(doc.lines, lines)
+          updateVersion = doc.version !== version
+          updateRanges = RangeManager.shouldUpdateRanges(doc.ranges, ranges)
+        }
+
+        let modified = false
+        let rev = (doc != null ? doc.rev : undefined) || 0
+
+        const updateLinesAndRangesIfNeeded = function (cb) {
+          if (updateLines || updateRanges) {
+            const update = {}
+            if (updateLines) {
+              update.lines = lines
+            }
+            if (updateRanges) {
+              update.ranges = ranges
+            }
+            logger.log({ project_id, doc_id }, 'updating doc lines and ranges')
+
+            modified = true
+            rev += 1 // rev will be incremented in mongo by MongoManager.upsertIntoDocCollection
+            return MongoManager.upsertIntoDocCollection(
+              project_id,
+              doc_id,
+              update,
+              cb
+            )
+          } else {
+            logger.log(
+              { project_id, doc_id },
+              'doc lines have not changed - not updating'
+            )
+            return cb()
+          }
+        }
+
+        const updateVersionIfNeeded = function (cb) {
+          if (updateVersion) {
+            logger.log(
+              {
+                project_id,
+                doc_id,
+                oldVersion: doc != null ? doc.version : undefined,
+                newVersion: version,
+              },
+              'updating doc version'
+            )
+            modified = true
+            return MongoManager.setDocVersion(doc_id, version, cb)
+          } else {
+            logger.log(
+              { project_id, doc_id, version },
+              'doc version has not changed - not updating'
+            )
+            return cb()
+          }
+        }
+
+        return updateLinesAndRangesIfNeeded(function (error) {
+          if (error != null) {
+            return callback(error)
+          }
+          return updateVersionIfNeeded(function (error) {
+            if (error != null) {
+              return callback(error)
+            }
+            return callback(null, modified, rev)
+          })
+        })
+      }
+    )
+  },
+
+  patchDoc(project_id, doc_id, meta, callback) {
+    const projection = { _id: 1, deleted: true }
+    MongoManager.findDoc(project_id, doc_id, projection, (error, doc) => {
+      if (error != null) {
+        return callback(error)
+      }
+      if (!doc) {
+        return callback(
+          new Errors.NotFoundError(
+            `No such project/doc to delete: ${project_id}/${doc_id}`
+          )
+        )
+      }
+
+      if (meta.deleted && Settings.docstore.archiveOnSoftDelete) {
+        // The user will not read this doc anytime soon. Flush it out of mongo.
+        DocArchive.archiveDocById(project_id, doc_id, err => {
+          if (err) {
+            logger.warn(
+              { project_id, doc_id, err },
+              'archiving a single doc in the background failed'
+            )
+          }
+        })
+      }
+
+      MongoManager.patchDoc(project_id, doc_id, meta, callback)
+    })
+  },
+}

services/docstore/app/js/Errors.js

@@ -0,0 +1,13 @@
+// import Errors from object-persistor to pass instanceof checks
+const OError = require('@overleaf/o-error')
+const { Errors } = require('@overleaf/object-persistor')
+
+class Md5MismatchError extends OError {}
+
+class DocModifiedError extends OError {}
+
+module.exports = {
+  Md5MismatchError,
+  DocModifiedError,
+  ...Errors,
+}

services/docstore/app/js/HealthChecker.js

@@ -0,0 +1,67 @@
+/* eslint-disable
+    camelcase,
+*/
+// TODO: This file was created by bulk-decaffeinate.
+// Fix any style issues and re-enable lint.
+/*
+ * decaffeinate suggestions:
+ * DS102: Remove unnecessary code created because of implicit returns
+ * DS207: Consider shorter variations of null checks
+ * Full docs: https://github.com/decaffeinate/decaffeinate/blob/master/docs/suggestions.md
+ */
+const { db, ObjectId } = require('./mongodb')
+const request = require('request')
+const async = require('async')
+const _ = require('underscore')
+const crypto = require('crypto')
+const settings = require('@overleaf/settings')
+const { port } = settings.internal.docstore
+const logger = require('logger-sharelatex')
+
+module.exports = {
+  check(callback) {
+    const doc_id = ObjectId()
+    const project_id = ObjectId(settings.docstore.healthCheck.project_id)
+    const url = `http://localhost:${port}/project/${project_id}/doc/${doc_id}`
+    const lines = [
+      'smoke test - delete me',
+      `${crypto.randomBytes(32).toString('hex')}`,
+    ]
+    const getOpts = () => ({
+      url,
+      timeout: 3000,
+    })
+    logger.log({ lines, url, doc_id, project_id }, 'running health check')
+    const jobs = [
+      function (cb) {
+        const opts = getOpts()
+        opts.json = { lines, version: 42, ranges: {} }
+        return request.post(opts, cb)
+      },
+      function (cb) {
+        const opts = getOpts()
+        opts.json = true
+        return request.get(opts, function (err, res, body) {
+          if (err != null) {
+            logger.err({ err }, 'docstore returned a error in health check get')
+            return cb(err)
+          } else if (res == null) {
+            return cb('no response from docstore with get check')
+          } else if ((res != null ? res.statusCode : undefined) !== 200) {
+            return cb(`status code not 200, its ${res.statusCode}`)
+          } else if (
+            _.isEqual(body != null ? body.lines : undefined, lines) &&
+            (body != null ? body._id : undefined) === doc_id.toString()
+          ) {
+            return cb()
+          } else {
+            return cb(`health check lines not equal ${body.lines} != ${lines}`)
+          }
+        })
+      },
+      cb => db.docs.deleteOne({ _id: doc_id, project_id }, cb),
+      cb => db.docOps.deleteOne({ doc_id }, cb),
+    ]
+    return async.series(jobs, callback)
+  },
+}

services/docstore/app/js/HttpController.js

@@ -0,0 +1,326 @@
+/* eslint-disable
+    camelcase,
+    handle-callback-err,
+    valid-typeof,
+*/
+// TODO: This file was created by bulk-decaffeinate.
+// Fix any style issues and re-enable lint.
+/*
+ * decaffeinate suggestions:
+ * DS101: Remove unnecessary use of Array.from
+ * DS102: Remove unnecessary code created because of implicit returns
+ * DS207: Consider shorter variations of null checks
+ * Full docs: https://github.com/decaffeinate/decaffeinate/blob/master/docs/suggestions.md
+ */
+let HttpController
+const DocManager = require('./DocManager')
+const logger = require('logger-sharelatex')
+const DocArchive = require('./DocArchiveManager')
+const HealthChecker = require('./HealthChecker')
+const Settings = require('@overleaf/settings')
+
+module.exports = HttpController = {
+  getDoc(req, res, next) {
+    if (next == null) {
+      next = function (error) {}
+    }
+    const { project_id } = req.params
+    const { doc_id } = req.params
+    const include_deleted =
+      (req.query != null ? req.query.include_deleted : undefined) === 'true'
+    logger.log({ project_id, doc_id }, 'getting doc')
+    return DocManager.getFullDoc(project_id, doc_id, function (error, doc) {
+      if (error != null) {
+        return next(error)
+      }
+      logger.log({ doc_id, project_id }, 'got doc')
+      if (doc == null) {
+        return res.sendStatus(404)
+      } else if (doc.deleted && !include_deleted) {
+        return res.sendStatus(404)
+      } else {
+        return res.json(HttpController._buildDocView(doc))
+      }
+    })
+  },
+
+  peekDoc(req, res, next) {
+    const { project_id } = req.params
+    const { doc_id } = req.params
+    logger.log({ project_id, doc_id }, 'peeking doc')
+    DocManager.peekDoc(project_id, doc_id, function (error, doc) {
+      if (error) {
+        return next(error)
+      }
+      if (doc == null) {
+        return res.sendStatus(404)
+      } else {
+        res.setHeader('x-doc-status', doc.inS3 ? 'archived' : 'active')
+        return res.json(HttpController._buildDocView(doc))
+      }
+    })
+  },
+
+  isDocDeleted(req, res, next) {
+    const { doc_id: docId, project_id: projectId } = req.params
+    DocManager.isDocDeleted(projectId, docId, function (error, deleted) {
+      if (error) {
+        return next(error)
+      }
+      res.json({ deleted })
+    })
+  },
+
+  getRawDoc(req, res, next) {
+    if (next == null) {
+      next = function (error) {}
+    }
+    const { project_id } = req.params
+    const { doc_id } = req.params
+    logger.log({ project_id, doc_id }, 'getting raw doc')
+    return DocManager.getDocLines(project_id, doc_id, function (error, doc) {
+      if (error != null) {
+        return next(error)
+      }
+      if (doc == null) {
+        return res.sendStatus(404)
+      } else {
+        res.setHeader('content-type', 'text/plain')
+        return res.send(HttpController._buildRawDocView(doc))
+      }
+    })
+  },
+
+  getAllDocs(req, res, next) {
+    if (next == null) {
+      next = function (error) {}
+    }
+    const { project_id } = req.params
+    logger.log({ project_id }, 'getting all docs')
+    return DocManager.getAllNonDeletedDocs(
+      project_id,
+      { lines: true, rev: true },
+      function (error, docs) {
+        if (docs == null) {
+          docs = []
+        }
+        if (error != null) {
+          return next(error)
+        }
+        return res.json(HttpController._buildDocsArrayView(project_id, docs))
+      }
+    )
+  },
+
+  getAllDeletedDocs(req, res, next) {
+    const { project_id } = req.params
+    logger.log({ project_id }, 'getting all deleted docs')
+    DocManager.getAllDeletedDocs(
+      project_id,
+      { name: true },
+      function (error, docs) {
+        if (error) {
+          return next(error)
+        }
+        res.json(
+          docs.map(doc => {
+            return { _id: doc._id.toString(), name: doc.name }
+          })
+        )
+      }
+    )
+  },
+
+  getAllRanges(req, res, next) {
+    if (next == null) {
+      next = function (error) {}
+    }
+    const { project_id } = req.params
+    logger.log({ project_id }, 'getting all ranges')
+    return DocManager.getAllNonDeletedDocs(
+      project_id,
+      { ranges: true },
+      function (error, docs) {
+        if (docs == null) {
+          docs = []
+        }
+        if (error != null) {
+          return next(error)
+        }
+        return res.json(HttpController._buildDocsArrayView(project_id, docs))
+      }
+    )
+  },
+
+  updateDoc(req, res, next) {
+    if (next == null) {
+      next = function (error) {}
+    }
+    const { project_id } = req.params
+    const { doc_id } = req.params
+    const lines = req.body != null ? req.body.lines : undefined
+    const version = req.body != null ? req.body.version : undefined
+    const ranges = req.body != null ? req.body.ranges : undefined
+
+    if (lines == null || !(lines instanceof Array)) {
+      logger.error({ project_id, doc_id }, 'no doc lines provided')
+      res.sendStatus(400) // Bad Request
+      return
+    }
+
+    if (version == null || typeof version === !'number') {
+      logger.error({ project_id, doc_id }, 'no doc version provided')
+      res.sendStatus(400) // Bad Request
+      return
+    }
+
+    if (ranges == null) {
+      logger.error({ project_id, doc_id }, 'no doc ranges provided')
+      res.sendStatus(400) // Bad Request
+      return
+    }
+
+    const bodyLength = lines.reduce((len, line) => line.length + len, 0)
+    if (bodyLength > Settings.max_doc_length) {
+      logger.error(
+        { project_id, doc_id, bodyLength },
+        'document body too large'
+      )
+      res.status(413).send('document body too large')
+      return
+    }
+
+    logger.log({ project_id, doc_id }, 'got http request to update doc')
+    return DocManager.updateDoc(
+      project_id,
+      doc_id,
+      lines,
+      version,
+      ranges,
+      function (error, modified, rev) {
+        if (error != null) {
+          return next(error)
+        }
+        return res.json({
+          modified,
+          rev,
+        })
+      }
+    )
+  },
+
+  patchDoc(req, res, next) {
+    const { project_id, doc_id } = req.params
+    logger.log({ project_id, doc_id }, 'patching doc')
+
+    const allowedFields = ['deleted', 'deletedAt', 'name']
+    const meta = {}
+    Object.entries(req.body).forEach(([field, value]) => {
+      if (allowedFields.includes(field)) {
+        meta[field] = value
+      } else {
+        logger.fatal({ field }, 'joi validation for pathDoc is broken')
+      }
+    })
+    DocManager.patchDoc(project_id, doc_id, meta, function (error) {
+      if (error) {
+        return next(error)
+      }
+      res.sendStatus(204)
+    })
+  },
+
+  _buildDocView(doc) {
+    const doc_view = { _id: doc._id != null ? doc._id.toString() : undefined }
+    for (const attribute of ['lines', 'rev', 'version', 'ranges', 'deleted']) {
+      if (doc[attribute] != null) {
+        doc_view[attribute] = doc[attribute]
+      }
+    }
+    return doc_view
+  },
+
+  _buildRawDocView(doc) {
+    return ((doc != null ? doc.lines : undefined) || []).join('\n')
+  },
+
+  _buildDocsArrayView(project_id, docs) {
+    const docViews = []
+    for (const doc of Array.from(docs)) {
+      if (doc != null) {
+        // There can end up being null docs for some reason :( (probably a race condition)
+        docViews.push(HttpController._buildDocView(doc))
+      } else {
+        logger.error(
+          { err: new Error('null doc'), project_id },
+          'encountered null doc'
+        )
+      }
+    }
+    return docViews
+  },
+
+  archiveAllDocs(req, res, next) {
+    if (next == null) {
+      next = function (error) {}
+    }
+    const { project_id } = req.params
+    logger.log({ project_id }, 'archiving all docs')
+    return DocArchive.archiveAllDocs(project_id, function (error) {
+      if (error != null) {
+        return next(error)
+      }
+      return res.sendStatus(204)
+    })
+  },
+
+  archiveDoc(req, res, next) {
+    const { project_id, doc_id } = req.params
+    logger.log({ project_id, doc_id }, 'archiving a doc')
+    DocArchive.archiveDocById(project_id, doc_id, function (error) {
+      if (error) {
+        return next(error)
+      }
+      res.sendStatus(204)
+    })
+  },
+
+  unArchiveAllDocs(req, res, next) {
+    if (next == null) {
+      next = function (error) {}
+    }
+    const { project_id } = req.params
+    logger.log({ project_id }, 'unarchiving all docs')
+    return DocArchive.unArchiveAllDocs(project_id, function (error) {
+      if (error != null) {
+        return next(error)
+      }
+      return res.sendStatus(200)
+    })
+  },
+
+  destroyAllDocs(req, res, next) {
+    if (next == null) {
+      next = function (error) {}
+    }
+    const { project_id } = req.params
+    logger.log({ project_id }, 'destroying all docs')
+    return DocArchive.destroyAllDocs(project_id, function (error) {
+      if (error != null) {
+        return next(error)
+      }
+      return res.sendStatus(204)
+    })
+  },
+
+  healthCheck(req, res) {
+    return HealthChecker.check(function (err) {
+      if (err != null) {
+        logger.err({ err }, 'error performing health check')
+        return res.sendStatus(500)
+      } else {
+        return res.sendStatus(200)
+      }
+    })
+  },
+}

services/docstore/app/js/MongoManager.js

@@ -0,0 +1,247 @@
+/* eslint-disable
+    camelcase,
+    handle-callback-err,
+*/
+// TODO: This file was created by bulk-decaffeinate.
+// Fix any style issues and re-enable lint.
+/*
+ * decaffeinate suggestions:
+ * DS102: Remove unnecessary code created because of implicit returns
+ * DS207: Consider shorter variations of null checks
+ * Full docs: https://github.com/decaffeinate/decaffeinate/blob/master/docs/suggestions.md
+ */
+let MongoManager
+const { db, ObjectId } = require('./mongodb')
+const logger = require('logger-sharelatex')
+const metrics = require('@overleaf/metrics')
+const Settings = require('@overleaf/settings')
+const Errors = require('./Errors')
+const { promisify } = require('util')
+
+module.exports = MongoManager = {
+  findDoc(project_id, doc_id, filter, callback) {
+    if (callback == null) {
+      callback = function (error, doc) {}
+    }
+    db.docs.findOne(
+      {
+        _id: ObjectId(doc_id.toString()),
+        project_id: ObjectId(project_id.toString()),
+      },
+      {
+        projection: filter,
+      },
+      callback
+    )
+  },
+
+  getProjectsDeletedDocs(project_id, filter, callback) {
+    db.docs
+      .find(
+        {
+          project_id: ObjectId(project_id.toString()),
+          deleted: true,
+        },
+        {
+          projection: filter,
+          sort: { deletedAt: -1 },
+          limit: Settings.max_deleted_docs,
+        }
+      )
+      .toArray(callback)
+  },
+
+  getProjectsDocs(project_id, options, filter, callback) {
+    const query = { project_id: ObjectId(project_id.toString()) }
+    if (!options.include_deleted) {
+      query.deleted = { $ne: true }
+    }
+    const queryOptions = {
+      projection: filter,
+    }
+    if (options.limit) {
+      queryOptions.limit = options.limit
+    }
+    db.docs.find(query, queryOptions).toArray(callback)
+  },
+
+  getArchivedProjectDocs(project_id, maxResults, callback) {
+    const query = {
+      project_id: ObjectId(project_id.toString()),
+      inS3: true,
+    }
+    db.docs
+      .find(query, { projection: { _id: 1 }, limit: maxResults })
+      .toArray(callback)
+  },
+
+  getNonArchivedProjectDocs(project_id, maxResults, callback) {
+    const query = {
+      project_id: ObjectId(project_id.toString()),
+      inS3: { $ne: true },
+    }
+    db.docs.find(query, { limit: maxResults }).toArray(callback)
+  },
+
+  getNonDeletedArchivedProjectDocs(project_id, maxResults, callback) {
+    const query = {
+      project_id: ObjectId(project_id.toString()),
+      deleted: { $ne: true },
+      inS3: true,
+    }
+    db.docs
+      .find(query, { projection: { _id: 1 }, limit: maxResults })
+      .toArray(callback)
+  },
+
+  upsertIntoDocCollection(project_id, doc_id, updates, callback) {
+    const update = {
+      $set: updates,
+      $inc: {
+        rev: 1,
+      },
+      $unset: {
+        inS3: true,
+      },
+    }
+    update.$set.project_id = ObjectId(project_id)
+    db.docs.updateOne(
+      { _id: ObjectId(doc_id) },
+      update,
+      { upsert: true },
+      callback
+    )
+  },
+
+  patchDoc(project_id, doc_id, meta, callback) {
+    db.docs.updateOne(
+      {
+        _id: ObjectId(doc_id),
+        project_id: ObjectId(project_id),
+      },
+      { $set: meta },
+      callback
+    )
+  },
+
+  markDocAsArchived(doc_id, rev, callback) {
+    const update = {
+      $set: {},
+      $unset: {},
+    }
+    update.$set.inS3 = true
+    update.$unset.lines = true
+    update.$unset.ranges = true
+    const query = {
+      _id: doc_id,
+      rev,
+    }
+    db.docs.updateOne(query, update, callback)
+  },
+
+  getDocVersion(doc_id, callback) {
+    if (callback == null) {
+      callback = function (error, version) {}
+    }
+    db.docOps.findOne(
+      {
+        doc_id: ObjectId(doc_id),
+      },
+      {
+        projection: {
+          version: 1,
+        },
+      },
+      function (error, doc) {
+        if (error != null) {
+          return callback(error)
+        }
+        callback(null, (doc && doc.version) || 0)
+      }
+    )
+  },
+
+  setDocVersion(doc_id, version, callback) {
+    if (callback == null) {
+      callback = function (error) {}
+    }
+    db.docOps.updateOne(
+      {
+        doc_id: ObjectId(doc_id),
+      },
+      {
+        $set: { version },
+      },
+      {
+        upsert: true,
+      },
+      callback
+    )
+  },
+
+  getDocRev(doc_id, callback) {
+    db.docs.findOne(
+      {
+        _id: ObjectId(doc_id.toString()),
+      },
+      {
+        projection: { rev: 1 },
+      },
+      function (err, doc) {
+        if (err != null) {
+          return callback(err)
+        }
+        callback(null, doc && doc.rev)
+      }
+    )
+  },
+
+  // Helper method  to support optimistic locking. Call the provided method for
+  // an existing doc and return the result if the rev in mongo is unchanged when
+  // checked afterwards. If the rev has changed, return a DocModifiedError.
+  withRevCheck(doc, method, callback) {
+    method(doc._id, function (err, result) {
+      if (err) return callback(err)
+      MongoManager.getDocRev(doc._id, function (err, currentRev) {
+        if (err) return callback(err)
+        if (doc.rev !== currentRev) {
+          return callback(
+            new Errors.DocModifiedError('doc rev has changed', {
+              doc_id: doc._id,
+              rev: doc.rev,
+              currentRev,
+            })
+          )
+        }
+        return callback(null, result)
+      })
+    })
+  },
+
+  destroyDoc(doc_id, callback) {
+    db.docs.deleteOne(
+      {
+        _id: ObjectId(doc_id),
+      },
+      function (err) {
+        if (err != null) {
+          return callback(err)
+        }
+        db.docOps.deleteOne(
+          {
+            doc_id: ObjectId(doc_id),
+          },
+          callback
+        )
+      }
+    )
+  },
+}
+
+const methods = Object.getOwnPropertyNames(MongoManager)
+
+module.exports.promises = {}
+for (const method of methods) {
+  metrics.timeAsyncMethod(MongoManager, method, 'mongo.MongoManager', logger)
+  module.exports.promises[method] = promisify(module.exports[method])
+}

services/docstore/app/js/PersistorManager.js

@@ -0,0 +1,9 @@
+const settings = require('@overleaf/settings')
+
+const persistorSettings = settings.docstore
+persistorSettings.Metrics = require('@overleaf/metrics')
+
+const ObjectPersistor = require('@overleaf/object-persistor')
+const persistor = ObjectPersistor(persistorSettings)
+
+module.exports = persistor

services/docstore/app/js/RangeManager.js

@@ -0,0 +1,69 @@
+/* eslint-disable
+    camelcase,
+    no-return-assign,
+*/
+// TODO: This file was created by bulk-decaffeinate.
+// Fix any style issues and re-enable lint.
+/*
+ * decaffeinate suggestions:
+ * DS101: Remove unnecessary use of Array.from
+ * DS102: Remove unnecessary code created because of implicit returns
+ * DS207: Consider shorter variations of null checks
+ * Full docs: https://github.com/decaffeinate/decaffeinate/blob/master/docs/suggestions.md
+ */
+let RangeManager
+const _ = require('underscore')
+const { ObjectId } = require('./mongodb')
+
+module.exports = RangeManager = {
+  shouldUpdateRanges(doc_ranges, incoming_ranges) {
+    if (incoming_ranges == null) {
+      throw new Error('expected incoming_ranges')
+    }
+
+    // If the ranges are empty, we don't store them in the DB, so set
+    // doc_ranges to an empty object as default, since this is was the
+    // incoming_ranges will be for an empty range set.
+    if (doc_ranges == null) {
+      doc_ranges = {}
+    }
+
+    return !_.isEqual(doc_ranges, incoming_ranges)
+  },
+
+  jsonRangesToMongo(ranges) {
+    if (ranges == null) {
+      return null
+    }
+
+    const updateMetadata = function (metadata) {
+      if ((metadata != null ? metadata.ts : undefined) != null) {
+        metadata.ts = new Date(metadata.ts)
+      }
+      if ((metadata != null ? metadata.user_id : undefined) != null) {
+        return (metadata.user_id = RangeManager._safeObjectId(metadata.user_id))
+      }
+    }
+
+    for (const change of Array.from(ranges.changes || [])) {
+      change.id = RangeManager._safeObjectId(change.id)
+      updateMetadata(change.metadata)
+    }
+    for (const comment of Array.from(ranges.comments || [])) {
+      comment.id = RangeManager._safeObjectId(comment.id)
+      if ((comment.op != null ? comment.op.t : undefined) != null) {
+        comment.op.t = RangeManager._safeObjectId(comment.op.t)
+      }
+      updateMetadata(comment.metadata)
+    }
+    return ranges
+  },
+
+  _safeObjectId(data) {
+    try {
+      return ObjectId(data)
+    } catch (error) {
+      return data
+    }
+  },
+}

services/docstore/app/js/mongodb.js

@@ -0,0 +1,36 @@
+const Settings = require('@overleaf/settings')
+const { MongoClient, ObjectId } = require('mongodb')
+
+const clientPromise = MongoClient.connect(
+  Settings.mongo.url,
+  Settings.mongo.options
+)
+
+let setupDbPromise
+async function waitForDb() {
+  if (!setupDbPromise) {
+    setupDbPromise = setupDb()
+  }
+  await setupDbPromise
+}
+
+const db = {}
+async function setupDb() {
+  const internalDb = (await clientPromise).db()
+
+  db.docs = internalDb.collection('docs')
+  db.docOps = internalDb.collection('docOps')
+}
+async function addCollection(name) {
+  await waitForDb()
+  const internalDb = (await clientPromise).db()
+
+  db[name] = internalDb.collection(name)
+}
+
+module.exports = {
+  db,
+  ObjectId,
+  addCollection,
+  waitForDb,
+}

services/docstore/buildscript.txt

@@ -0,0 +1,8 @@
+docstore
+--dependencies=mongo,gcs
+--docker-repos=gcr.io/overleaf-ops
+--env-add=
+--env-pass-through=
+--node-version=12.22.3
+--public-repo=True
+--script-version=3.11.0

services/docstore/config/settings.defaults.js

@@ -0,0 +1,88 @@
+const http = require('http')
+http.globalAgent.maxSockets = 300
+
+const Settings = {
+  internal: {
+    docstore: {
+      port: 3016,
+      host: process.env.LISTEN_ADDRESS || 'localhost',
+    },
+  },
+
+  mongo: {
+    options: {
+      useUnifiedTopology:
+        (process.env.MONGO_USE_UNIFIED_TOPOLOGY || 'true') === 'true',
+    },
+  },
+
+  docstore: {
+    archiveOnSoftDelete: process.env.ARCHIVE_ON_SOFT_DELETE === 'true',
+    keepSoftDeletedDocsArchived:
+      process.env.KEEP_SOFT_DELETED_DOCS_ARCHIVED === 'true',
+
+    backend: process.env.BACKEND || 's3',
+    healthCheck: {
+      project_id: process.env.HEALTH_CHECK_PROJECT_ID,
+    },
+    bucket: process.env.BUCKET_NAME || process.env.AWS_BUCKET || 'bucket',
+    gcs: {
+      unlockBeforeDelete: process.env.GCS_UNLOCK_BEFORE_DELETE === 'true',
+      deletedBucketSuffix: process.env.GCS_DELETED_BUCKET_SUFFIX,
+      deleteConcurrency: parseInt(process.env.GCS_DELETE_CONCURRENCY) || 50,
+    },
+  },
+
+  max_deleted_docs: parseInt(process.env.MAX_DELETED_DOCS, 10) || 2000,
+
+  max_doc_length: parseInt(process.env.MAX_DOC_LENGTH) || 2 * 1024 * 1024, // 2mb
+
+  archiveBatchSize: parseInt(process.env.ARCHIVE_BATCH_SIZE, 10) || 50,
+  unArchiveBatchSize: parseInt(process.env.UN_ARCHIVE_BATCH_SIZE, 10) || 50,
+  destroyBatchSize: parseInt(process.env.DESTROY_BATCH_SIZE, 10) || 2000,
+  destroyRetryCount: parseInt(process.env.DESTROY_RETRY_COUNT || '3', 10),
+  parallelArchiveJobs: parseInt(process.env.PARALLEL_ARCHIVE_JOBS, 10) || 5,
+}
+
+if (process.env.MONGO_CONNECTION_STRING) {
+  Settings.mongo.url = process.env.MONGO_CONNECTION_STRING
+} else if (process.env.MONGO_HOST) {
+  Settings.mongo.url = `mongodb://${process.env.MONGO_HOST}/sharelatex`
+} else {
+  Settings.mongo.url = 'mongodb://127.0.0.1/sharelatex'
+}
+
+if (
+  process.env.AWS_ACCESS_KEY_ID &&
+  process.env.AWS_SECRET_ACCESS_KEY &&
+  process.env.AWS_BUCKET
+) {
+  Settings.docstore.s3 = {
+    key: process.env.AWS_ACCESS_KEY_ID,
+    secret: process.env.AWS_SECRET_ACCESS_KEY,
+    bucket: process.env.AWS_BUCKET,
+    endpoint: process.env.AWS_S3_ENDPOINT,
+    pathStyle: process.env.AWS_S3_PATH_STYLE,
+    partSize: parseInt(process.env.AWS_S3_PARTSIZE) || 100 * 1024 * 1024,
+  }
+}
+
+if (process.env.GCS_API_ENDPOINT) {
+  Settings.docstore.gcs.endpoint = {
+    apiEndpoint: process.env.GCS_API_ENDPOINT,
+    apiScheme: process.env.GCS_API_SCHEME,
+    projectId: process.env.GCS_PROJECT_ID,
+  }
+}
+
+if (process.env.FALLBACK_BACKEND) {
+  Settings.docstore.fallback = {
+    backend: process.env.FALLBACK_BACKEND,
+    // mapping of bucket names on the fallback, to bucket names on the primary.
+    // e.g. { myS3UserFilesBucketName: 'myGoogleUserFilesBucketName' }
+    buckets: JSON.parse(process.env.FALLBACK_BUCKET_MAPPING || '{}'),
+    copyOnMiss: process.env.COPY_ON_MISS === 'true',
+  }
+}
+
+module.exports = Settings

services/docstore/docker-compose-config.yml

@@ -0,0 +1,14 @@
+version: "2.3"
+
+services:
+  dev:
+    environment:
+    - AWS_BUCKET
+    - AWS_ACCESS_KEY_ID
+    - AWS_SECRET_ACCESS_KEY
+
+  ci:
+    environment:
+    - AWS_BUCKET
+    - AWS_ACCESS_KEY_ID
+    - AWS_SECRET_ACCESS_KEY

services/docstore/docker-compose.ci.yml

@@ -0,0 +1,64 @@
+# This file was auto-generated, do not edit it directly.
+# Instead run bin/update_build_scripts from
+# https://github.com/sharelatex/sharelatex-dev-environment
+
+version: "2.3"
+
+services:
+  test_unit:
+    image: ci/$PROJECT_NAME:$BRANCH_NAME-$BUILD_NUMBER
+    user: node
+    command: npm run test:unit:_run
+    environment:
+      NODE_ENV: test
+      NODE_OPTIONS: "--unhandled-rejections=strict"
+
+
+  test_acceptance:
+    build: .
+    image: ci/$PROJECT_NAME:$BRANCH_NAME-$BUILD_NUMBER
+    extends:
+      file: docker-compose-config.yml
+      service: ci
+    environment:
+      ELASTIC_SEARCH_DSN: es:9200
+      REDIS_HOST: redis
+      QUEUES_REDIS_HOST: redis
+      MONGO_HOST: mongo
+      POSTGRES_HOST: postgres
+      GCS_API_ENDPOINT: gcs:9090
+      GCS_API_SCHEME: http
+      GCS_PROJECT_ID: fake
+      STORAGE_EMULATOR_HOST: http://gcs:9090/storage/v1
+      MOCHA_GREP: ${MOCHA_GREP}
+      NODE_ENV: test
+      NODE_OPTIONS: "--unhandled-rejections=strict"
+    depends_on:
+      mongo:
+        condition: service_healthy
+      gcs:
+        condition: service_healthy
+    user: node
+    command: npm run test:acceptance:_run
+
+
+  tar:
+    build: .
+    image: ci/$PROJECT_NAME:$BRANCH_NAME-$BUILD_NUMBER
+    volumes:
+      - ./:/tmp/build/
+    command: tar -czf /tmp/build/build.tar.gz --exclude=build.tar.gz --exclude-vcs .
+    user: root
+  mongo:
+    image: mongo:4.0
+    healthcheck:
+      test: "mongo --quiet localhost/test --eval 'quit(db.runCommand({ ping: 1 }).ok ? 0 : 1)'"
+      interval: 1s
+      retries: 20
+  gcs:
+    image: fsouza/fake-gcs-server:v1.21.2
+    command: ["--port=9090", "--scheme=http"]
+    healthcheck:
+      test: wget --quiet --output-document=/dev/null http://localhost:9090/storage/v1/b
+      interval: 1s
+      retries: 20

services/docstore/docker-compose.yml

@@ -0,0 +1,63 @@
+# This file was auto-generated, do not edit it directly.
+# Instead run bin/update_build_scripts from
+# https://github.com/sharelatex/sharelatex-dev-environment
+
+version: "2.3"
+
+services:
+  test_unit:
+    image: node:12.22.3
+    volumes:
+      - .:/app
+    working_dir: /app
+    environment:
+      MOCHA_GREP: ${MOCHA_GREP}
+      NODE_ENV: test
+      NODE_OPTIONS: "--unhandled-rejections=strict"
+    command: npm run --silent test:unit
+    user: node
+
+  test_acceptance:
+    image: node:12.22.3
+    volumes:
+      - .:/app
+    working_dir: /app
+    extends:
+      file: docker-compose-config.yml
+      service: dev
+    environment:
+      ELASTIC_SEARCH_DSN: es:9200
+      REDIS_HOST: redis
+      QUEUES_REDIS_HOST: redis
+      MONGO_HOST: mongo
+      POSTGRES_HOST: postgres
+      GCS_API_ENDPOINT: gcs:9090
+      GCS_API_SCHEME: http
+      GCS_PROJECT_ID: fake
+      STORAGE_EMULATOR_HOST: http://gcs:9090/storage/v1
+      MOCHA_GREP: ${MOCHA_GREP}
+      LOG_LEVEL: ERROR
+      NODE_ENV: test
+      NODE_OPTIONS: "--unhandled-rejections=strict"
+    user: node
+    depends_on:
+      mongo:
+        condition: service_healthy
+      gcs:
+        condition: service_healthy
+    command: npm run --silent test:acceptance
+
+  mongo:
+    image: mongo:4.0
+    healthcheck:
+      test: "mongo --quiet localhost/test --eval 'quit(db.runCommand({ ping: 1 }).ok ? 0 : 1)'"
+      interval: 1s
+      retries: 20
+
+  gcs:
+    image: fsouza/fake-gcs-server:v1.21.2
+    command: ["--port=9090", "--scheme=http"]
+    healthcheck:
+      test: wget --quiet --output-document=/dev/null http://localhost:9090/storage/v1/b
+      interval: 1s
+      retries: 20

services/docstore/nodemon.json

@@ -0,0 +1,17 @@
+{
+  "ignore": [
+    ".git",
+    "node_modules/"
+  ],
+  "verbose": true,
+  "legacyWatch": true,
+  "execMap": {
+    "js": "npm run start"
+  },
+  "watch": [
+    "app/js/",
+    "app.js",
+    "config/"
+  ],
+  "ext": "js"
+}

services/docstore/package-lock.json

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+  }
+}

services/docstore/package.json

@@ -0,0 +1,62 @@
+{
+  "name": "docstore-sharelatex",
+  "version": "0.1.2",
+  "description": "A CRUD API for handling text documents in projects",
+  "author": "ShareLaTeX <team@sharelatex>",
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/sharelatex/docstore-sharelatex.git"
+  },
+  "scripts": {
+    "start": "node $NODE_APP_OPTIONS app.js",
+    "test:acceptance:_run": "mocha --recursive --reporter spec --timeout 15000 --exit $@ test/acceptance/js",
+    "test:acceptance": "npm run test:acceptance:_run -- --grep=$MOCHA_GREP",
+    "test:unit:_run": "mocha --recursive --reporter spec $@ test/unit/js",
+    "test:unit": "npm run test:unit:_run -- --grep=$MOCHA_GREP",
+    "nodemon": "nodemon --config nodemon.json",
+    "lint": "eslint --max-warnings 0 --format unix .",
+    "format": "prettier --list-different $PWD/'**/*.js'",
+    "format:fix": "prettier --write $PWD/'**/*.js'",
+    "lint:fix": "eslint --fix ."
+  },
+  "dependencies": {
+    "@overleaf/metrics": "^3.5.1",
+    "@overleaf/o-error": "^3.0.0",
+    "@overleaf/object-persistor": "https://github.com/overleaf/object-persistor/archive/4ca62157a2beb747e9a56da3ce1569124b90378a.tar.gz",
+    "@overleaf/settings": "^2.1.1",
+    "async": "^2.6.3",
+    "body-parser": "^1.19.0",
+    "bunyan": "^1.8.15",
+    "celebrate": "^13.0.4",
+    "express": "^4.17.1",
+    "logger-sharelatex": "^2.2.0",
+    "mongodb": "^3.6.0",
+    "p-map": "^4.0.0",
+    "request": "^2.88.2",
+    "streamifier": "^0.1.1",
+    "underscore": "~1.12.1"
+  },
+  "devDependencies": {
+    "@google-cloud/storage": "^5.1.2",
+    "chai": "^4.2.0",
+    "chai-as-promised": "^7.1.1",
+    "eslint": "^7.21.0",
+    "eslint-config-prettier": "^8.1.0",
+    "eslint-config-standard": "^16.0.2",
+    "eslint-plugin-chai-expect": "^2.2.0",
+    "eslint-plugin-chai-friendly": "^0.6.0",
+    "eslint-plugin-import": "^2.22.1",
+    "eslint-plugin-mocha": "^8.0.0",
+    "eslint-plugin-node": "^11.1.0",
+    "eslint-plugin-prettier": "^3.1.2",
+    "eslint-plugin-promise": "^4.2.1",
+    "mocha": "^8.3.2",
+    "prettier": "^2.2.1",
+    "sandboxed-module": "~2.0.4",
+    "sinon": "~9.0.2",
+    "sinon-chai": "^3.5.0"
+  },
+  "engines": {
+    "node": "~6.14.1"
+  }
+}

services/docstore/test/acceptance/deps/Dockerfile.fake-gcs

@@ -0,0 +1,5 @@
+FROM fsouza/fake-gcs-server:latest
+RUN apk add --update --no-cache curl
+COPY healthcheck.sh /healthcheck.sh
+HEALTHCHECK --interval=1s --timeout=1s --retries=30 CMD /healthcheck.sh http://localhost:9090
+CMD ["--port=9090", "--scheme=http"]

services/docstore/test/acceptance/deps/healthcheck.sh

@@ -0,0 +1,9 @@
+#!/bin/sh
+
+# health check to allow 404 status code as valid
+STATUSCODE=$(curl --silent --output /dev/null --write-out "%{http_code}" $1)
+# will be 000 on non-http error (e.g. connection failure)
+if test $STATUSCODE -ge 500 || test $STATUSCODE -lt 200; then
+  exit 1
+fi
+exit 0

services/docstore/test/acceptance/js/ArchiveDocsTests.js

@@ -0,0 +1,1232 @@
+/* eslint-disable
+    camelcase,
+    handle-callback-err,
+    no-unused-vars,
+*/
+// TODO: This file was created by bulk-decaffeinate.
+// Fix any style issues and re-enable lint.
+/*
+ * decaffeinate suggestions:
+ * DS101: Remove unnecessary use of Array.from
+ * DS102: Remove unnecessary code created because of implicit returns
+ * DS207: Consider shorter variations of null checks
+ * Full docs: https://github.com/decaffeinate/decaffeinate/blob/master/docs/suggestions.md
+ */
+
+const Settings = require('@overleaf/settings')
+const { expect } = require('chai')
+const { db, ObjectId } = require('../../../app/js/mongodb')
+const async = require('async')
+const DocstoreApp = require('./helpers/DocstoreApp')
+const DocstoreClient = require('./helpers/DocstoreClient')
+const { Storage } = require('@google-cloud/storage')
+const Persistor = require('../../../app/js/PersistorManager')
+const Streamifier = require('streamifier')
+
+function uploadContent(path, json, callback) {
+  const stream = Streamifier.createReadStream(JSON.stringify(json))
+  Persistor.sendStream(Settings.docstore.bucket, path, stream)
+    .then(() => callback())
+    .catch(callback)
+}
+
+describe('Archiving', function () {
+  before(function (done) {
+    return DocstoreApp.ensureRunning(done)
+  })
+
+  before(async function () {
+    const storage = new Storage(Settings.docstore.gcs.endpoint)
+    await storage.createBucket(Settings.docstore.bucket)
+    await storage.createBucket(`${Settings.docstore.bucket}-deleted`)
+  })
+
+  describe('multiple docs in a project', function () {
+    before(function (done) {
+      this.project_id = ObjectId()
+      this.docs = [
+        {
+          _id: ObjectId(),
+          lines: ['one', 'two', 'three'],
+          ranges: {},
+          version: 2,
+        },
+        {
+          _id: ObjectId(),
+          lines: ['aaa', 'bbb', 'ccc'],
+          ranges: {},
+          version: 4,
+        },
+      ]
+      const jobs = Array.from(this.docs).map(doc =>
+        (doc => {
+          return callback => {
+            return DocstoreClient.createDoc(
+              this.project_id,
+              doc._id,
+              doc.lines,
+              doc.version,
+              doc.ranges,
+              callback
+            )
+          }
+        })(doc)
+      )
+
+      return async.series(jobs, error => {
+        if (error != null) {
+          throw error
+        }
+        return DocstoreClient.archiveAllDoc(this.project_id, (error, res) => {
+          this.res = res
+          return done()
+        })
+      })
+    })
+
+    it('should archive all the docs', function (done) {
+      this.res.statusCode.should.equal(204)
+      return done()
+    })
+
+    it('should set inS3 and unset lines and ranges in each doc', function (done) {
+      const jobs = Array.from(this.docs).map(doc =>
+        (doc => {
+          return callback => {
+            return db.docs.findOne({ _id: doc._id }, (error, doc) => {
+              expect(doc.lines).not.to.exist
+              expect(doc.ranges).not.to.exist
+              doc.inS3.should.equal(true)
+              return callback()
+            })
+          }
+        })(doc)
+      )
+      return async.series(jobs, done)
+    })
+
+    it('should set the docs in s3 correctly', function (done) {
+      const jobs = Array.from(this.docs).map(doc =>
+        (doc => {
+          return callback => {
+            return DocstoreClient.getS3Doc(
+              this.project_id,
+              doc._id,
+              (error, s3_doc) => {
+                s3_doc.lines.should.deep.equal(doc.lines)
+                s3_doc.ranges.should.deep.equal(doc.ranges)
+                callback()
+              }
+            )
+          }
+        })(doc)
+      )
+      return async.series(jobs, done)
+    })
+
+    return describe('after unarchiving from a request for the project', function () {
+      before(function (done) {
+        return DocstoreClient.getAllDocs(
+          this.project_id,
+          (error, res, fetched_docs) => {
+            this.fetched_docs = fetched_docs
+            if (error != null) {
+              throw error
+            }
+            return done()
+          }
+        )
+      })
+
+      it('should return the docs', function (done) {
+        for (let i = 0; i < this.fetched_docs.length; i++) {
+          const doc = this.fetched_docs[i]
+          doc.lines.should.deep.equal(this.docs[i].lines)
+        }
+        return done()
+      })
+
+      return it('should restore the docs to mongo', function (done) {
+        const jobs = Array.from(this.docs).map((doc, i) =>
+          ((doc, i) => {
+            return callback => {
+              return db.docs.findOne({ _id: doc._id }, (error, doc) => {
+                doc.lines.should.deep.equal(this.docs[i].lines)
+                doc.ranges.should.deep.equal(this.docs[i].ranges)
+                expect(doc.inS3).not.to.exist
+                return callback()
+              })
+            }
+          })(doc, i)
+        )
+        return async.series(jobs, done)
+      })
+    })
+  })
+
+  describe('a deleted doc', function () {
+    beforeEach(function (done) {
+      this.project_id = ObjectId()
+      this.doc = {
+        _id: ObjectId(),
+        lines: ['one', 'two', 'three'],
+        ranges: {},
+        version: 2,
+      }
+      return DocstoreClient.createDoc(
+        this.project_id,
+        this.doc._id,
+        this.doc.lines,
+        this.doc.version,
+        this.doc.ranges,
+        error => {
+          if (error != null) {
+            throw error
+          }
+          return DocstoreClient.deleteDoc(
+            this.project_id,
+            this.doc._id,
+            error => {
+              if (error != null) {
+                throw error
+              }
+              return DocstoreClient.archiveAllDoc(
+                this.project_id,
+                (error, res) => {
+                  this.res = res
+                  if (error != null) {
+                    throw error
+                  }
+                  return done()
+                }
+              )
+            }
+          )
+        }
+      )
+    })
+
+    it('should successully archive the docs', function (done) {
+      this.res.statusCode.should.equal(204)
+      return done()
+    })
+
+    it('should set inS3 and unset lines and ranges in each doc', function (done) {
+      return db.docs.findOne({ _id: this.doc._id }, (error, doc) => {
+        if (error != null) {
+          throw error
+        }
+        expect(doc.lines).not.to.exist
+        expect(doc.ranges).not.to.exist
+        doc.inS3.should.equal(true)
+        doc.deleted.should.equal(true)
+        return done()
+      })
+    })
+
+    it('should set the doc in s3 correctly', function (done) {
+      return DocstoreClient.getS3Doc(
+        this.project_id,
+        this.doc._id,
+        (error, s3_doc) => {
+          if (error != null) {
+            throw error
+          }
+          s3_doc.lines.should.deep.equal(this.doc.lines)
+          s3_doc.ranges.should.deep.equal(this.doc.ranges)
+          return done()
+        }
+      )
+    })
+
+    describe('after unarchiving from a request for the project', function () {
+      beforeEach(function (done) {
+        return DocstoreClient.getAllDocs(
+          this.project_id,
+          (error, res, fetched_docs) => {
+            this.fetched_docs = fetched_docs
+            if (error != null) {
+              throw error
+            }
+            return done()
+          }
+        )
+      })
+
+      it('should not included the deleted', function (done) {
+        this.fetched_docs.length.should.equal(0)
+        return done()
+      })
+
+      return it('should restore the doc to mongo', function (done) {
+        return db.docs.findOne({ _id: this.doc._id }, (error, doc) => {
+          if (error != null) {
+            throw error
+          }
+          doc.lines.should.deep.equal(this.doc.lines)
+          doc.ranges.should.deep.equal(this.doc.ranges)
+          expect(doc.inS3).not.to.exist
+          doc.deleted.should.equal(true)
+          return done()
+        })
+      })
+    })
+
+    describe('when keepSoftDeletedDocsArchived is enabled', function () {
+      let keepSoftDeletedDocsArchived
+      beforeEach(function overwriteSetting() {
+        keepSoftDeletedDocsArchived =
+          Settings.docstore.keepSoftDeletedDocsArchived
+        Settings.docstore.keepSoftDeletedDocsArchived = true
+      })
+      afterEach(function restoreSetting() {
+        Settings.docstore.keepSoftDeletedDocsArchived =
+          keepSoftDeletedDocsArchived
+      })
+
+      describe('after unarchiving from a request for the project', function () {
+        beforeEach(function (done) {
+          DocstoreClient.getAllDocs(
+            this.project_id,
+            (error, res, fetched_docs) => {
+              this.fetched_docs = fetched_docs
+              if (error) {
+                return done(error)
+              }
+              done()
+            }
+          )
+        })
+
+        it('should not included the deleted', function (done) {
+          this.fetched_docs.length.should.equal(0)
+          done()
+        })
+
+        it('should not have restored the deleted doc to mongo', function (done) {
+          db.docs.findOne({ _id: this.doc._id }, (error, doc) => {
+            if (error) {
+              return done(error)
+            }
+            expect(doc.lines).to.not.exist
+            expect(doc.ranges).to.not.exist
+            expect(doc.inS3).to.equal(true)
+            expect(doc.deleted).to.equal(true)
+            done()
+          })
+        })
+      })
+    })
+  })
+
+  describe('archiving a single doc', function () {
+    before(function (done) {
+      this.project_id = ObjectId()
+      this.timeout(1000 * 30)
+      this.doc = {
+        _id: ObjectId(),
+        lines: ['foo', 'bar'],
+        ranges: {},
+        version: 2,
+      }
+      DocstoreClient.createDoc(
+        this.project_id,
+        this.doc._id,
+        this.doc.lines,
+        this.doc.version,
+        this.doc.ranges,
+        error => {
+          if (error) {
+            return done(error)
+          }
+          DocstoreClient.archiveDocById(
+            this.project_id,
+            this.doc._id,
+            (error, res) => {
+              this.res = res
+              if (error) {
+                return done(error)
+              }
+              done()
+            }
+          )
+        }
+      )
+    })
+
+    it('should successully archive the doc', function (done) {
+      this.res.statusCode.should.equal(204)
+      done()
+    })
+
+    it('should set inS3 and unset lines and ranges in the doc', function (done) {
+      db.docs.findOne({ _id: this.doc._id }, (error, doc) => {
+        if (error) {
+          return done(error)
+        }
+        expect(doc.lines).not.to.exist
+        expect(doc.ranges).not.to.exist
+        doc.inS3.should.equal(true)
+        done()
+      })
+    })
+
+    it('should set the doc in s3 correctly', function (done) {
+      DocstoreClient.getS3Doc(
+        this.project_id,
+        this.doc._id,
+        (error, s3_doc) => {
+          if (error) {
+            return done(error)
+          }
+          s3_doc.lines.should.deep.equal(this.doc.lines)
+          s3_doc.ranges.should.deep.equal(this.doc.ranges)
+          done()
+        }
+      )
+    })
+  })
+
+  describe('a doc with large lines', function () {
+    before(function (done) {
+      this.project_id = ObjectId()
+      this.timeout(1000 * 30)
+      const quarterMegInBytes = 250000
+      const big_line = require('crypto')
+        .randomBytes(quarterMegInBytes)
+        .toString('hex')
+      this.doc = {
+        _id: ObjectId(),
+        lines: [big_line, big_line, big_line, big_line],
+        ranges: {},
+        version: 2,
+      }
+      return DocstoreClient.createDoc(
+        this.project_id,
+        this.doc._id,
+        this.doc.lines,
+        this.doc.version,
+        this.doc.ranges,
+        error => {
+          if (error != null) {
+            throw error
+          }
+          return DocstoreClient.archiveAllDoc(this.project_id, (error, res) => {
+            this.res = res
+            if (error != null) {
+              throw error
+            }
+            return done()
+          })
+        }
+      )
+    })
+
+    it('should successully archive the docs', function (done) {
+      this.res.statusCode.should.equal(204)
+      return done()
+    })
+
+    it('should set inS3 and unset lines and ranges in each doc', function (done) {
+      return db.docs.findOne({ _id: this.doc._id }, (error, doc) => {
+        if (error != null) {
+          throw error
+        }
+        expect(doc.lines).not.to.exist
+        expect(doc.ranges).not.to.exist
+        doc.inS3.should.equal(true)
+        return done()
+      })
+    })
+
+    it('should set the doc in s3 correctly', function (done) {
+      return DocstoreClient.getS3Doc(
+        this.project_id,
+        this.doc._id,
+        (error, s3_doc) => {
+          if (error != null) {
+            throw error
+          }
+          s3_doc.lines.should.deep.equal(this.doc.lines)
+          s3_doc.ranges.should.deep.equal(this.doc.ranges)
+          return done()
+        }
+      )
+    })
+
+    return describe('after unarchiving from a request for the project', function () {
+      before(function (done) {
+        return DocstoreClient.getAllDocs(
+          this.project_id,
+          (error, res, fetched_docs) => {
+            this.fetched_docs = fetched_docs
+            if (error != null) {
+              throw error
+            }
+            return done()
+          }
+        )
+      })
+
+      return it('should restore the doc to mongo', function (done) {
+        return db.docs.findOne({ _id: this.doc._id }, (error, doc) => {
+          if (error != null) {
+            throw error
+          }
+          doc.lines.should.deep.equal(this.doc.lines)
+          doc.ranges.should.deep.equal(this.doc.ranges)
+          expect(doc.inS3).not.to.exist
+          return done()
+        })
+      })
+    })
+  })
+
+  describe('a doc with naughty strings', function () {
+    before(function (done) {
+      this.project_id = ObjectId()
+      this.doc = {
+        _id: ObjectId(),
+        lines: [
+          '',
+          'undefined',
+          'undef',
+          'null',
+          'NULL',
+          '(null)',
+          'nil',
+          'NIL',
+          'true',
+          'false',
+          'True',
+          'False',
+          'None',
+          '\\',
+          '\\\\',
+          '0',
+          '1',
+          '1.00',
+          '$1.00',
+          '1/2',
+          '1E2',
+          '1E02',
+          '1E+02',
+          '-1',
+          '-1.00',
+          '-$1.00',
+          '-1/2',
+          '-1E2',
+          '-1E02',
+          '-1E+02',
+          '1/0',
+          '0/0',
+          '-2147483648/-1',
+          '-9223372036854775808/-1',
+          '0.00',
+          '0..0',
+          '.',
+          '0.0.0',
+          '0,00',
+          '0,,0',
+          ',',
+          '0,0,0',
+          '0.0/0',
+          '1.0/0.0',
+          '0.0/0.0',
+          '1,0/0,0',
+          '0,0/0,0',
+          '--1',
+          '-',
+          '-.',
+          '-,',
+          '999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999',
+          'NaN',
+          'Infinity',
+          '-Infinity',
+          '0x0',
+          '0xffffffff',
+          '0xffffffffffffffff',
+          '0xabad1dea',
+          '123456789012345678901234567890123456789',
+          '1,000.00',
+          '1 000.00',
+          "1'000.00",
+          '1,000,000.00',
+          '1 000 000.00',
+          "1'000'000.00",
+          '1.000,00',
+          '1 000,00',
+          "1'000,00",
+          '1.000.000,00',
+          '1 000i̳̞v̢͇ḙ͎͟-҉̭̩̼͔m̤̭̫i͕͇̝̦n̗͙ḍ̟ ̯̲͕͞ǫ̟̯̰̲͙̻̝f ̪̰̰̗̖̭̘͘c̦͍̲̞͍̩̙ḥ͚a̮͎̟̙͜ơ̩̹͎s̤.̝̝ ҉Z̡̖̜͖̰̣͉̜a͖̰͙̬͡l̲̫̳͍̩g̡̟̼̱͚̞̬ͅo̗͜.̟',
+          '̦H̬̤̗̤͝e͜ ̜̥̝̻͍̟́w̕h̖̯͓o̝͙̖͎̱̮ ҉̺̙̞̟͈W̷̼̭a̺̪͍į͈͕̭͙̯̜t̶̼̮s̘͙͖̕ ̠̫̠B̻͍͙͉̳ͅe̵h̵̬͇̫͙i̹͓̳̳̮͎̫̕n͟d̴̪̜̖ ̰͉̩͇͙̲͞ͅT͖̼͓̪͢h͏͓̮̻e̬̝̟ͅ ̤̹̝W͙̞̝͔͇͝ͅa͏͓͔̹̼̣l̴͔̰̤̟͔ḽ̫.͕',
+          'Z̮̞̠͙͔ͅḀ̗̞͈̻̗Ḷ͙͎̯̹̞͓G̻O̭̗̮',
+          "˙ɐnbᴉlɐ ɐuƃɐɯ ǝɹolop ʇǝ ǝɹoqɐl ʇn ʇunpᴉpᴉɔuᴉ ɹodɯǝʇ poɯsnᴉǝ op pǝs 'ʇᴉlǝ ƃuᴉɔsᴉdᴉpɐ ɹnʇǝʇɔǝsuoɔ 'ʇǝɯɐ ʇᴉs ɹolop ɯnsdᴉ ɯǝɹo˥",
+          '00˙Ɩ$-',
+          'Ｔｈｅ ｑｕｉｃｋ ｂｒｏｗｎ ｆｏｘ ｊｕｍｐｓ ｏｖｅｒ ｔｈｅ ｌａｚｙ ｄｏｇ',
+          '𝐓𝐡𝐞 𝐪𝐮𝐢𝐜𝐤 𝐛𝐫𝐨𝐰𝐧 𝐟𝐨𝐱 𝐣𝐮𝐦𝐩𝐬 𝐨𝐯𝐞𝐫 𝐭𝐡𝐞 𝐥𝐚𝐳𝐲 𝐝𝐨𝐠',
+          '𝕿𝖍𝖊 𝖖𝖚𝖎𝖈𝖐 𝖇𝖗𝖔𝖜𝖓 𝖋𝖔𝖝 𝖏𝖚𝖒𝖕𝖘 𝖔𝖛𝖊𝖗 𝖙𝖍𝖊 𝖑𝖆𝖟𝖞 𝖉𝖔𝖌',
+          '𝑻𝒉𝒆 𝒒𝒖𝒊𝒄𝒌 𝒃𝒓𝒐𝒘𝒏 𝒇𝒐𝒙 𝒋𝒖𝒎𝒑𝒔 𝒐𝒗𝒆𝒓 𝒕𝒉𝒆 𝒍𝒂𝒛𝒚 𝒅𝒐𝒈',
+          '𝓣𝓱𝓮 𝓺𝓾𝓲𝓬𝓴 𝓫𝓻𝓸𝔀𝓷 𝓯𝓸𝔁 𝓳𝓾𝓶𝓹𝓼 𝓸𝓿𝓮𝓻 𝓽𝓱𝓮 𝓵𝓪𝔃𝔂 𝓭𝓸𝓰',
+          '𝕋𝕙𝕖 𝕢𝕦𝕚𝕔𝕜 𝕓𝕣𝕠𝕨𝕟 𝕗𝕠𝕩 𝕛𝕦𝕞𝕡𝕤 𝕠𝕧𝕖𝕣 𝕥𝕙𝕖 𝕝𝕒𝕫𝕪 𝕕𝕠𝕘',
+          '𝚃𝚑𝚎 𝚚𝚞𝚒𝚌𝚔 𝚋𝚛𝚘𝚠𝚗 𝚏𝚘𝚡 𝚓𝚞𝚖𝚙𝚜 𝚘𝚟𝚎𝚛 𝚝𝚑𝚎 𝚕𝚊𝚣𝚢 𝚍𝚘𝚐',
+          '⒯⒣⒠ ⒬⒰⒤⒞⒦ ⒝⒭⒪⒲⒩ ⒡⒪⒳ ⒥⒰⒨⒫⒮ ⒪⒱⒠⒭ ⒯⒣⒠ ⒧⒜⒵⒴ ⒟⒪⒢',
+          '<script>alert(123)</script>',
+          '&lt;script&gt;alert(&#39;123&#39;);&lt;/script&gt;',
+          '<img src=x onerror=alert(123) />',
+          '<svg><script>123<1>alert(123)</script> ',
+          '"><script>alert(123)</script>',
+          "'><script>alert(123)</script>",
+          '><script>alert(123)</script>',
+          '</script><script>alert(123)</script>',
+          '< / script >< script >alert(123)< / script >',
+          ' onfocus=JaVaSCript:alert(123) autofocus ',
+          '" onfocus=JaVaSCript:alert(123) autofocus ',
+          "' onfocus=JaVaSCript:alert(123) autofocus ",
+          '＜script＞alert(123)＜/script＞',
+          '<sc<script>ript>alert(123)</sc</script>ript>',
+          '--><script>alert(123)</script>',
+          '";alert(123);t="',
+          "';alert(123);t='",
+          'JavaSCript:alert(123)',
+          ';alert(123);',
+          'src=JaVaSCript:prompt(132)',
+          '"><script>alert(123);</script x="',
+          "'><script>alert(123);</script x='",
+          '><script>alert(123);</script x=',
+          '" autofocus onkeyup="javascript:alert(123)',
+          "' autofocus onkeyup='javascript:alert(123)",
+          '<script\\x20type="text/javascript">javascript:alert(1);</script>',
+          '<script\\x3Etype="text/javascript">javascript:alert(1);</script>',
+          '<script\\x0Dtype="text/javascript">javascript:alert(1);</script>',
+          '<script\\x09type="text/javascript">javascript:alert(1);</script>',
+          '<script\\x0Ctype="text/javascript">javascript:alert(1);</script>',
+          '<script\\x2Ftype="text/javascript">javascript:alert(1);</script>',
+          '<script\\x0Atype="text/javascript">javascript:alert(1);</script>',
+          '\'`"><\\x3Cscript>javascript:alert(1)</script>        ',
+          '\'`"><\\x00script>javascript:alert(1)</script>',
+          'ABC<div style="x\\x3Aexpression(javascript:alert(1)">DEF',
+          'ABC<div style="x:expression\\x5C(javascript:alert(1)">DEF',
+          'ABC<div style="x:expression\\x00(javascript:alert(1)">DEF',
+          'ABC<div style="x:exp\\x00ression(javascript:alert(1)">DEF',
+          'ABC<div style="x:exp\\x5Cression(javascript:alert(1)">DEF',
+          'ABC<div style="x:\\x0Aexpression(javascript:alert(1)">DEF',
+          'ABC<div style="x:\\x09expression(javascript:alert(1)">DEF',
+          'ABC<div style="x:\\xE3\\x80\\x80expression(javascript:alert(1)">DEF',
+          'ABC<div style="x:\\xE2\\x80\\x84expression(javascript:alert(1)">DEF',
+          'ABC<div style="x:\\xC2\\xA0expression(javascript:alert(1)">DEF',
+          'ABC<div style="x:\\xE2\\x80\\x80expression(javascript:alert(1)">DEF',
+          'ABC<div style="x:\\xE2\\x80\\x8Aexpression(javascript:alert(1)">DEF',
+          'ABC<div style="x:\\x0Dexpression(javascript:alert(1)">DEF',
+          'ABC<div style="x:\\x0Cexpression(javascript:alert(1)">DEF',
+          'ABC<div style="x:\\xE2\\x80\\x87expression(javascript:alert(1)">DEF',
+          'ABC<div style="x:\\xEF\\xBB\\xBFexpression(javascript:alert(1)">DEF',
+          'ABC<div style="x:\\x20expression(javascript:alert(1)">DEF',
+          'ABC<div style="x:\\xE2\\x80\\x88expression(javascript:alert(1)">DEF',
+          'ABC<div style="x:\\x00expression(javascript:alert(1)">DEF',
+          'ABC<div style="x:\\xE2\\x80\\x8Bexpression(javascript:alert(1)">DEF',
+          'ABC<div style="x:\\xE2\\x80\\x86expression(javascript:alert(1)">DEF',
+          'ABC<div style="x:\\xE2\\x80\\x85expression(javascript:alert(1)">DEF',
+          'ABC<div style="x:\\xE2\\x80\\x82expression(javascript:alert(1)">DEF',
+          'ABC<div style="x:\\x0Bexpression(javascript:alert(1)">DEF',
+          'ABC<div style="x:\\xE2\\x80\\x81expression(javascript:alert(1)">DEF',
+          'ABC<div style="x:\\xE2\\x80\\x83expression(javascript:alert(1)">DEF',
+          'ABC<div style="x:\\xE2\\x80\\x89expression(javascript:alert(1)">DEF',
+          '<a href="\\x0Bjavascript:javascript:alert(1)" id="fuzzelement1">test</a>',
+          '<a href="\\x0Fjavascript:javascript:alert(1)" id="fuzzelement1">test</a>',
+          '<a href="\\xC2\\xA0javascript:javascript:alert(1)" id="fuzzelement1">test</a>',
+          '<a href="\\x05javascript:javascript:alert(1)" id="fuzzelement1">test</a>',
+          '<a href="\\xE1\\xA0\\x8Ejavascript:javascript:alert(1)" id="fuzzelement1">test</a>',
+          '<a href="\\x18javascript:javascript:alert(1)" id="fuzzelement1">test</a>',
+          '<a href="\\x11javascript:javascript:alert(1)" id="fuzzelement1">test</a>',
+          '<a href="\\xE2\\x80\\x88javascript:javascript:alert(1)" id="fuzzelement1">test</a>',
+          '<a href="\\xE2\\x80\\x89javascript:javascript:alert(1)" id="fuzzelement1">test</a>',
+          '<a href="\\xE2\\x80\\x80javascript:javascript:alert(1)" id="fuzzelement1">test</a>',
+          '<a href="\\x17javascript:javascript:alert(1)" id="fuzzelement1">test</a>',
+          '<a href="\\x03javascript:javascript:alert(1)" id="fuzzelement1">test</a>',
+          '<a href="\\x0Ejavascript:javascript:alert(1)" id="fuzzelement1">test</a>',
+          '<a href="\\x1Ajavascript:javascript:alert(1)" id="fuzzelement1">test</a>',
+          '<a href="\\x00javascript:javascript:alert(1)" id="fuzzelement1">test</a>',
+          '<a href="\\x10javascript:javascript:alert(1)" id="fuzzelement1">test</a>',
+          '<a href="\\xE2\\x80\\x82javascript:javascript:alert(1)" id="fuzzelement1">test</a>',
+          '<a href="\\x20javascript:javascript:alert(1)" id="fuzzelement1">test</a>',
+          '<a href="\\x13javascript:javascript:alert(1)" id="fuzzelement1">test</a>',
+          '<a href="\\x09javascript:javascript:alert(1)" id="fuzzelement1">test</a>',
+          '<a href="\\xE2\\x80\\x8Ajavascript:javascript:alert(1)" id="fuzzelement1">test</a>',
+          '<a href="\\x14javascript:javascript:alert(1)" id="fuzzelement1">test</a>',
+          '<a href="\\x19javascript:javascript:alert(1)" id="fuzzelement1">test</a>',
+          '<a href="\\xE2\\x80\\xAFjavascript:javascript:alert(1)" id="fuzzelement1">test</a>',
+          '<a href="\\x1Fjavascript:javascript:alert(1)" id="fuzzelement1">test</a>',
+          '<a href="\\xE2\\x80\\x81javascript:javascript:alert(1)" id="fuzzelement1">test</a>',
+          '<a href="\\x1Djavascript:javascript:alert(1)" id="fuzzelement1">test</a>',
+          '<a href="\\xE2\\x80\\x87javascript:javascript:alert(1)" id="fuzzelement1">test</a>',
+          '<a href="\\x07javascript:javascript:alert(1)" id="fuzzelement1">test</a>',
+          '<a href="\\xE1\\x9A\\x80javascript:javascript:alert(1)" id="fuzzelement1">test</a>',
+          '<a href="\\xE2\\x80\\x83javascript:javascript:alert(1)" id="fuzzelement1">test</a>',
+          '<a href="\\x04javascript:javascript:alert(1)" id="fuzzelement1">test</a>',
+          '<a href="\\x01javascript:javascript:alert(1)" id="fuzzelement1">test</a>',
+          '<a href="\\x08javascript:javascript:alert(1)" id="fuzzelement1">test</a>',
+          '<a href="\\xE2\\x80\\x84javascript:javascript:alert(1)" id="fuzzelement1">test</a>',
+          '<a href="\\xE2\\x80\\x86javascript:javascript:alert(1)" id="fuzzelement1">test</a>',
+          '<a href="\\xE3\\x80\\x80javascript:javascript:alert(1)" id="fuzzelement1">test</a>',
+          '<a href="\\x12javascript:javascript:alert(1)" id="fuzzelement1">test</a>',
+          '<a href="\\x0Djavascript:javascript:alert(1)" id="fuzzelement1">test</a>',
+          '<a href="\\x0Ajavascript:javascript:alert(1)" id="fuzzelement1">test</a>',
+          '<a href="\\x0Cjavascript:javascript:alert(1)" id="fuzzelement1">test</a>',
+          '<a href="\\x15javascript:javascript:alert(1)" id="fuzzelement1">test</a>',
+          '<a href="\\xE2\\x80\\xA8javascript:javascript:alert(1)" id="fuzzelement1">test</a>',
+          '<a href="\\x16javascript:javascript:alert(1)" id="fuzzelement1">test</a>',
+          '<a href="\\x02javascript:javascript:alert(1)" id="fuzzelement1">test</a>',
+          '<a href="\\x1Bjavascript:javascript:alert(1)" id="fuzzelement1">test</a>',
+          '<a href="\\x06javascript:javascript:alert(1)" id="fuzzelement1">test</a>',
+          '<a href="\\xE2\\x80\\xA9javascript:javascript:alert(1)" id="fuzzelement1">test</a>',
+          '<a href="\\xE2\\x80\\x85javascript:javascript:alert(1)" id="fuzzelement1">test</a>',
+          '<a href="\\x1Ejavascript:javascript:alert(1)" id="fuzzelement1">test</a>',
+          '<a href="\\xE2\\x81\\x9Fjavascript:javascript:alert(1)" id="fuzzelement1">test</a>',
+          '<a href="\\x1Cjavascript:javascript:alert(1)" id="fuzzelement1">test</a>',
+          '<a href="javascript\\x00:javascript:alert(1)" id="fuzzelement1">test</a>',
+          '<a href="javascript\\x3A:javascript:alert(1)" id="fuzzelement1">test</a>',
+          '<a href="javascript\\x09:javascript:alert(1)" id="fuzzelement1">test</a>',
+          '<a href="javascript\\x0D:javascript:alert(1)" id="fuzzelement1">test</a>',
+          '<a href="javascript\\x0A:javascript:alert(1)" id="fuzzelement1">test</a>',
+          '`"\'><img src=xxx:x \\x0Aonerror=javascript:alert(1)>',
+          '`"\'><img src=xxx:x \\x22onerror=javascript:alert(1)>',
+          '`"\'><img src=xxx:x \\x0Bonerror=javascript:alert(1)>',
+          '`"\'><img src=xxx:x \\x0Donerror=javascript:alert(1)>',
+          '`"\'><img src=xxx:x \\x2Fonerror=javascript:alert(1)>',
+          '`"\'><img src=xxx:x \\x09onerror=javascript:alert(1)>',
+          '`"\'><img src=xxx:x \\x0Conerror=javascript:alert(1)>',
+          '`"\'><img src=xxx:x \\x00onerror=javascript:alert(1)>',
+          '`"\'><img src=xxx:x \\x27onerror=javascript:alert(1)>',
+          '`"\'><img src=xxx:x \\x20onerror=javascript:alert(1)>',
+          '"`\'><script>\\x3Bjavascript:alert(1)</script>',
+          '"`\'><script>\\x0Djavascript:alert(1)</script>',
+          '"`\'><script>\\xEF\\xBB\\xBFjavascript:alert(1)</script>',
+          '"`\'><script>\\xE2\\x80\\x81javascript:alert(1)</script>',
+          '"`\'><script>\\xE2\\x80\\x84javascript:alert(1)</script>',
+          '"`\'><script>\\xE3\\x80\\x80javascript:alert(1)</script>',
+          '"`\'><script>\\x09javascript:alert(1)</script>',
+          '"`\'><script>\\xE2\\x80\\x89javascript:alert(1)</script>',
+          '"`\'><script>\\xE2\\x80\\x85javascript:alert(1)</script>',
+          '"`\'><script>\\xE2\\x80\\x88javascript:alert(1)</script>',
+          '"`\'><script>\\x00javascript:alert(1)</script>',
+          '"`\'><script>\\xE2\\x80\\xA8javascript:alert(1)</script>',
+          '"`\'><script>\\xE2\\x80\\x8Ajavascript:alert(1)</script>',
+          '"`\'><script>\\xE1\\x9A\\x80javascript:alert(1)</script>',
+          '"`\'><script>\\x0Cjavascript:alert(1)</script>',
+          '"`\'><script>\\x2Bjavascript:alert(1)</script>',
+          '"`\'><script>\\xF0\\x90\\x96\\x9Ajavascript:alert(1)</script>',
+          '"`\'><script>-javascript:alert(1)</script>',
+          '"`\'><script>\\x0Ajavascript:alert(1)</script>',
+          '"`\'><script>\\xE2\\x80\\xAFjavascript:alert(1)</script>',
+          '"`\'><script>\\x7Ejavascript:alert(1)</script>',
+          '"`\'><script>\\xE2\\x80\\x87javascript:alert(1)</script>',
+          '"`\'><script>\\xE2\\x81\\x9Fjavascript:alert(1)</script>',
+          '"`\'><script>\\xE2\\x80\\xA9javascript:alert(1)</script>',
+          '"`\'><script>\\xC2\\x85javascript:alert(1)</script>',
+          '"`\'><script>\\xEF\\xBF\\xAEjavascript:alert(1)</script>',
+          '"`\'><script>\\xE2\\x80\\x83javascript:alert(1)</script>',
+          '"`\'><script>\\xE2\\x80\\x8Bjavascript:alert(1)</script>',
+          '"`\'><script>\\xEF\\xBF\\xBEjavascript:alert(1)</script>',
+          '"`\'><script>\\xE2\\x80\\x80javascript:alert(1)</script>',
+          '"`\'><script>\\x21javascript:alert(1)</script>',
+          '"`\'><script>\\xE2\\x80\\x82javascript:alert(1)</script>',
+          '"`\'><script>\\xE2\\x80\\x86javascript:alert(1)</script>',
+          '"`\'><script>\\xE1\\xA0\\x8Ejavascript:alert(1)</script>',
+          '"`\'><script>\\x0Bjavascript:alert(1)</script>',
+          '"`\'><script>\\x20javascript:alert(1)</script>',
+          '"`\'><script>\\xC2\\xA0javascript:alert(1)</script>',
+          '<img \\x00src=x onerror="alert(1)">',
+          '<img \\x47src=x onerror="javascript:alert(1)">',
+          '<img \\x11src=x onerror="javascript:alert(1)">',
+          '<img \\x12src=x onerror="javascript:alert(1)">',
+          '<img\\x47src=x onerror="javascript:alert(1)">',
+          '<img\\x10src=x onerror="javascript:alert(1)">',
+          '<img\\x13src=x onerror="javascript:alert(1)">',
+          '<img\\x32src=x onerror="javascript:alert(1)">',
+          '<img\\x47src=x onerror="javascript:alert(1)">',
+          '<img\\x11src=x onerror="javascript:alert(1)">',
+          '<img \\x47src=x onerror="javascript:alert(1)">',
+          '<img \\x34src=x onerror="javascript:alert(1)">',
+          '<img \\x39src=x onerror="javascript:alert(1)">',
+          '<img \\x00src=x onerror="javascript:alert(1)">',
+          '<img src\\x09=x onerror="javascript:alert(1)">',
+          '<img src\\x10=x onerror="javascript:alert(1)">',
+          '<img src\\x13=x onerror="javascript:alert(1)">',
+          '<img src\\x32=x onerror="javascript:alert(1)">',
+          '<img src\\x12=x onerror="javascript:alert(1)">',
+          '<img src\\x11=x onerror="javascript:alert(1)">',
+          '<img src\\x00=x onerror="javascript:alert(1)">',
+          '<img src\\x47=x onerror="javascript:alert(1)">',
+          '<img src=x\\x09onerror="javascript:alert(1)">',
+          '<img src=x\\x10onerror="javascript:alert(1)">',
+          '<img src=x\\x11onerror="javascript:alert(1)">',
+          '<img src=x\\x12onerror="javascript:alert(1)">',
+          '<img src=x\\x13onerror="javascript:alert(1)">',
+          '<img[a][b][c]src[d]=x[e]onerror=[f]"alert(1)">',
+          '<img src=x onerror=\\x09"javascript:alert(1)">',
+          '<img src=x onerror=\\x10"javascript:alert(1)">',
+          '<img src=x onerror=\\x11"javascript:alert(1)">',
+          '<img src=x onerror=\\x12"javascript:alert(1)">',
+          '<img src=x onerror=\\x32"javascript:alert(1)">',
+          '<img src=x onerror=\\x00"javascript:alert(1)">',
+          '<a href=java&#1&#2&#3&#4&#5&#6&#7&#8&#11&#12script:javascript:alert(1)>XXX</a>',
+          '<img src="x` `<script>javascript:alert(1)</script>"` `>',
+          '<img src onerror /" \'"= alt=javascript:alert(1)//">',
+          '<title onpropertychange=javascript:alert(1)></title><title title=>',
+          '<a href=http://foo.bar/#x=`y></a><img alt="`><img src=x:x onerror=javascript:alert(1)></a>">',
+          '<!--[if]><script>javascript:alert(1)</script -->',
+          '<!--[if<img src=x onerror=javascript:alert(1)//]> -->',
+          '<script src="/\\%(jscript)s"></script>',
+          '<script src="\\\\%(jscript)s"></script>',
+          '<IMG """><SCRIPT>alert("XSS")</SCRIPT>">',
+          '<IMG SRC=javascript:alert(String.fromCharCode(88,83,83))>',
+          '<IMG SRC=# onmouseover="alert(\'xxs\')">',
+          '<IMG SRC= onmouseover="alert(\'xxs\')">',
+          '<IMG onmouseover="alert(\'xxs\')">',
+          '<IMG SRC=&#106;&#97;&#118;&#97;&#115;&#99;&#114;&#105;&#112;&#116;&#58;&#97;&#108;&#101;&#114;&#116;&#40;&#39;&#88;&#83;&#83;&#39;&#41;>',
+          '<IMG SRC=&#0000106&#0000097&#0000118&#0000097&#0000115&#0000099&#0000114&#0000105&#0000112&#0000116&#0000058&#0000097&#0000108&#0000101&#0000114&#0000116&#0000040&#0000039&#0000088&#0000083&#0000083&#0000039&#0000041>',
+          '<IMG SRC=&#x6A&#x61&#x76&#x61&#x73&#x63&#x72&#x69&#x70&#x74&#x3A&#x61&#x6C&#x65&#x72&#x74&#x28&#x27&#x58&#x53&#x53&#x27&#x29>',
+          '<IMG SRC="jav   ascript:alert(\'XSS\');">',
+          '<IMG SRC="jav&#x09;ascript:alert(\'XSS\');">',
+          '<IMG SRC="jav&#x0A;ascript:alert(\'XSS\');">',
+          '<IMG SRC="jav&#x0D;ascript:alert(\'XSS\');">',
+          'perl -e \'print "<IMG SRC=java\\0script:alert(\\"XSS\\")>";\' > out',
+          '<IMG SRC=" &#14;  javascript:alert(\'XSS\');">',
+          '<SCRIPT/XSS SRC="http://ha.ckers.org/xss.js"></SCRIPT>',
+          '<BODY onload!#$%&()*~+-_.,:;?@[/|\\]^`=alert("XSS")>',
+          '<SCRIPT/SRC="http://ha.ckers.org/xss.js"></SCRIPT>',
+          '<<SCRIPT>alert("XSS");//<</SCRIPT>',
+          '<SCRIPT SRC=http://ha.ckers.org/xss.js?< B >',
+          '<SCRIPT SRC=//ha.ckers.org/.j>',
+          '<IMG SRC="javascript:alert(\'XSS\')"',
+          '<iframe src=http://ha.ckers.org/scriptlet.html <',
+          "\\\";alert('XSS');//",
+          '<plaintext>',
+          '1;DROP TABLE users',
+          "1'; DROP TABLE users-- 1",
+          "' OR 1=1 -- 1",
+          "' OR '1'='1",
+          '-',
+          '--',
+          '--version',
+          '--help',
+          '$USER',
+          '/dev/null; touch /tmp/blns.fail ; echo',
+          '`touch /tmp/blns.fail`',
+          '$(touch /tmp/blns.fail)',
+          '@{[system "touch /tmp/blns.fail"]}',
+          'eval("puts \'hello world\'")',
+          'System("ls -al /")',
+          '`ls -al /`',
+          'Kernel.exec("ls -al /")',
+          'Kernel.exit(1)',
+          "%x('ls -al /')",
+          '<?xml version="1.0" encoding="ISO-8859-1"?><!DOCTYPE foo [ <!ELEMENT foo ANY ><!ENTITY xxe SYSTEM "file:///etc/passwd" >]><foo>&xxe;</foo>',
+          '$HOME',
+          "$ENV{'HOME'}",
+          '%d',
+          '%s',
+          '%*.*s',
+          '../../../../../../../../../../../etc/passwd%00',
+          '../../../../../../../../../../../etc/hosts',
+          '() { 0; }; touch /tmp/blns.shellshock1.fail;',
+          '() { _; } >_[$($())] { touch /tmp/blns.shellshock2.fail; }',
+          'CON',
+          'PRN',
+          'AUX',
+          'CLOCK$',
+          'NUL',
+          'A:',
+          'ZZ:',
+          'COM1',
+          'LPT1',
+          'LPT2',
+          'LPT3',
+          'COM2',
+          'COM3',
+          'COM4',
+          'Scunthorpe General Hospital',
+          'Penistone Community Church',
+          'Lightwater Country Park',
+          'Jimmy Clitheroe',
+          'Horniman Museum',
+          'shitake mushrooms',
+          'RomansInSussex.co.uk',
+          'http://www.cum.qc.ca/',
+          'Craig Cockburn, Software Specialist',
+          'Linda Callahan',
+          'Dr. Herman I. Libshitz',
+          'magna cum laude',
+          'Super Bowl XXX',
+          'medieval erection of parapets',
+          'evaluate',
+          'mocha',
+          'expression',
+          'Arsenal canal',
+          'classic',
+          'Tyson Gay',
+          "If you're reading this, you've been in a coma for almost 20 years now. We're trying a new technique. We don't know where this message will end up in your dream, but we hope it works. Please wake up, we miss you.",
+          'Roses are \u001b[0;31mred\u001b[0m, violets are \u001b[0;34mblue. Hope you enjoy terminal hue',
+          'But now...\u001b[20Cfor my greatest trick...\u001b[8m',
+          'The quic\b\b\b\b\b\bk brown fo\u0007\u0007\u0007\u0007\u0007\u0007\u0007\u0007\u0007\u0007\u0007x... [Beeeep]',
+          'Powerلُلُصّبُلُلصّبُررً ॣ ॣh ॣ ॣ冗',
+        ],
+        ranges: {},
+        version: 2,
+      }
+      return DocstoreClient.createDoc(
+        this.project_id,
+        this.doc._id,
+        this.doc.lines,
+        this.doc.version,
+        this.doc.ranges,
+        error => {
+          if (error != null) {
+            throw error
+          }
+          return DocstoreClient.archiveAllDoc(this.project_id, (error, res) => {
+            this.res = res
+            if (error != null) {
+              throw error
+            }
+            return done()
+          })
+        }
+      )
+    })
+
+    it('should successully archive the docs', function (done) {
+      this.res.statusCode.should.equal(204)
+      return done()
+    })
+
+    it('should set inS3 and unset lines and ranges in each doc', function (done) {
+      return db.docs.findOne({ _id: this.doc._id }, (error, doc) => {
+        if (error != null) {
+          throw error
+        }
+        expect(doc.lines).not.to.exist
+        expect(doc.ranges).not.to.exist
+        doc.inS3.should.equal(true)
+        return done()
+      })
+    })
+
+    it('should set the doc in s3 correctly', function (done) {
+      return DocstoreClient.getS3Doc(
+        this.project_id,
+        this.doc._id,
+        (error, s3_doc) => {
+          if (error != null) {
+            throw error
+          }
+          s3_doc.lines.should.deep.equal(this.doc.lines)
+          s3_doc.ranges.should.deep.equal(this.doc.ranges)
+          return done()
+        }
+      )
+    })
+
+    return describe('after unarchiving from a request for the project', function () {
+      before(function (done) {
+        return DocstoreClient.getAllDocs(
+          this.project_id,
+          (error, res, fetched_docs) => {
+            this.fetched_docs = fetched_docs
+            if (error != null) {
+              throw error
+            }
+            return done()
+          }
+        )
+      })
+
+      return it('should restore the doc to mongo', function (done) {
+        return db.docs.findOne({ _id: this.doc._id }, (error, doc) => {
+          if (error != null) {
+            throw error
+          }
+          doc.lines.should.deep.equal(this.doc.lines)
+          doc.ranges.should.deep.equal(this.doc.ranges)
+          expect(doc.inS3).not.to.exist
+          return done()
+        })
+      })
+    })
+  })
+
+  describe('a doc with ranges', function () {
+    before(function (done) {
+      this.project_id = ObjectId()
+      this.doc = {
+        _id: ObjectId(),
+        lines: ['one', 'two', 'three'],
+        ranges: {
+          changes: [
+            {
+              id: ObjectId(),
+              op: { i: 'foo', p: 24 },
+              metadata: {
+                user_id: ObjectId(),
+                ts: new Date('2017-01-27T16:10:44.194Z'),
+              },
+            },
+            {
+              id: ObjectId(),
+              op: { d: 'bar', p: 50 },
+              metadata: {
+                user_id: ObjectId(),
+                ts: new Date('2017-01-27T18:10:44.194Z'),
+              },
+            },
+          ],
+          comments: [
+            {
+              id: ObjectId(),
+              op: { c: 'comment', p: 284, t: ObjectId() },
+              metadata: {
+                user_id: ObjectId(),
+                ts: new Date('2017-01-26T14:22:04.869Z'),
+              },
+            },
+          ],
+        },
+        version: 2,
+      }
+      return DocstoreClient.createDoc(
+        this.project_id,
+        this.doc._id,
+        this.doc.lines,
+        this.doc.version,
+        this.doc.ranges,
+        error => {
+          if (error != null) {
+            throw error
+          }
+          return DocstoreClient.archiveAllDoc(this.project_id, (error, res) => {
+            this.res = res
+            if (error != null) {
+              throw error
+            }
+            return done()
+          })
+        }
+      )
+    })
+
+    it('should successully archive the docs', function (done) {
+      this.res.statusCode.should.equal(204)
+      return done()
+    })
+
+    it('should set inS3 and unset lines and ranges in each doc', function (done) {
+      return db.docs.findOne({ _id: this.doc._id }, (error, doc) => {
+        if (error != null) {
+          throw error
+        }
+        expect(doc.lines).not.to.exist
+        expect(doc.ranges).not.to.exist
+        doc.inS3.should.equal(true)
+        return done()
+      })
+    })
+
+    it('should set the doc in s3 correctly', function (done) {
+      return DocstoreClient.getS3Doc(
+        this.project_id,
+        this.doc._id,
+        (error, s3_doc) => {
+          if (error != null) {
+            throw error
+          }
+          s3_doc.lines.should.deep.equal(this.doc.lines)
+          const ranges = JSON.parse(JSON.stringify(this.doc.ranges)) // ObjectId -> String
+          s3_doc.ranges.should.deep.equal(ranges)
+          return done()
+        }
+      )
+    })
+
+    return describe('after unarchiving from a request for the project', function () {
+      before(function (done) {
+        return DocstoreClient.getAllDocs(
+          this.project_id,
+          (error, res, fetched_docs) => {
+            this.fetched_docs = fetched_docs
+            if (error != null) {
+              throw error
+            }
+            return done()
+          }
+        )
+      })
+
+      return it('should restore the doc to mongo', function (done) {
+        return db.docs.findOne({ _id: this.doc._id }, (error, doc) => {
+          if (error != null) {
+            throw error
+          }
+          doc.lines.should.deep.equal(this.doc.lines)
+          doc.ranges.should.deep.equal(this.doc.ranges)
+          expect(doc.inS3).not.to.exist
+          return done()
+        })
+      })
+    })
+  })
+
+  describe('a doc that is archived twice', function () {
+    before(function (done) {
+      this.project_id = ObjectId()
+      this.doc = {
+        _id: ObjectId(),
+        lines: ['abc', 'def', 'ghi'],
+        ranges: {},
+        version: 2,
+      }
+      return DocstoreClient.createDoc(
+        this.project_id,
+        this.doc._id,
+        this.doc.lines,
+        this.doc.version,
+        this.doc.ranges,
+        error => {
+          if (error != null) {
+            throw error
+          }
+          return DocstoreClient.archiveAllDoc(this.project_id, (error, res) => {
+            this.res = res
+            if (error != null) {
+              throw error
+            }
+            this.res.statusCode.should.equal(204)
+            return DocstoreClient.archiveAllDoc(
+              this.project_id,
+              (error, res1) => {
+                this.res = res1
+                if (error != null) {
+                  throw error
+                }
+                this.res.statusCode.should.equal(204)
+                return done()
+              }
+            )
+          })
+        }
+      )
+    })
+
+    it('should set inS3 and unset lines and ranges in each doc', function (done) {
+      return db.docs.findOne({ _id: this.doc._id }, (error, doc) => {
+        if (error != null) {
+          throw error
+        }
+        expect(doc.lines).not.to.exist
+        expect(doc.ranges).not.to.exist
+        doc.inS3.should.equal(true)
+        return done()
+      })
+    })
+
+    it('should set the doc in s3 correctly', function (done) {
+      return DocstoreClient.getS3Doc(
+        this.project_id,
+        this.doc._id,
+        (error, s3_doc) => {
+          if (error != null) {
+            throw error
+          }
+          s3_doc.lines.should.deep.equal(this.doc.lines)
+          s3_doc.ranges.should.deep.equal(this.doc.ranges)
+          return done()
+        }
+      )
+    })
+
+    return describe('after unarchiving from a request for the project', function () {
+      before(function (done) {
+        return DocstoreClient.getAllDocs(
+          this.project_id,
+          (error, res, fetched_docs) => {
+            this.fetched_docs = fetched_docs
+            if (error != null) {
+              throw error
+            }
+            return done()
+          }
+        )
+      })
+
+      return it('should restore the doc to mongo', function (done) {
+        return db.docs.findOne({ _id: this.doc._id }, (error, doc) => {
+          if (error != null) {
+            throw error
+          }
+          doc.lines.should.deep.equal(this.doc.lines)
+          doc.ranges.should.deep.equal(this.doc.ranges)
+          expect(doc.inS3).not.to.exist
+          return done()
+        })
+      })
+    })
+  })
+
+  return describe('a doc with the old schema (just an array of lines)', function () {
+    before(function (done) {
+      this.project_id = ObjectId()
+      this.doc = {
+        _id: ObjectId(),
+        lines: ['abc', 'def', 'ghi'],
+        ranges: {},
+        version: 2,
+      }
+      uploadContent(
+        `${this.project_id}/${this.doc._id}`,
+        this.doc.lines,
+        error => {
+          expect(error).not.to.exist
+          db.docs.insert(
+            {
+              project_id: this.project_id,
+              _id: this.doc._id,
+              rev: this.doc.version,
+              inS3: true,
+            },
+            error => {
+              if (error != null) {
+                throw error
+              }
+              DocstoreClient.getAllDocs(
+                this.project_id,
+                (error, res, fetched_docs) => {
+                  this.fetched_docs = fetched_docs
+                  if (error != null) {
+                    throw error
+                  }
+                  return done()
+                }
+              )
+            }
+          )
+        }
+      )
+    })
+
+    it('should restore the doc to mongo', function (done) {
+      return db.docs.findOne({ _id: this.doc._id }, (error, doc) => {
+        if (error != null) {
+          throw error
+        }
+        doc.lines.should.deep.equal(this.doc.lines)
+        expect(doc.inS3).not.to.exist
+        return done()
+      })
+    })
+
+    return it('should return the doc', function (done) {
+      this.fetched_docs[0].lines.should.deep.equal(this.doc.lines)
+      return done()
+    })
+  })
+})

services/docstore/test/acceptance/js/DeletingDocsTests.js

@@ -0,0 +1,470 @@
+/* eslint-disable
+    camelcase,
+    handle-callback-err,
+    no-unused-vars,
+*/
+// TODO: This file was created by bulk-decaffeinate.
+// Fix any style issues and re-enable lint.
+/*
+ * decaffeinate suggestions:
+ * DS102: Remove unnecessary code created because of implicit returns
+ * DS207: Consider shorter variations of null checks
+ * Full docs: https://github.com/decaffeinate/decaffeinate/blob/master/docs/suggestions.md
+ */
+const { db, ObjectId } = require('../../../app/js/mongodb')
+const { expect } = require('chai')
+const DocstoreApp = require('./helpers/DocstoreApp')
+const Errors = require('../../../app/js/Errors')
+const Settings = require('@overleaf/settings')
+
+const DocstoreClient = require('./helpers/DocstoreClient')
+
+function deleteTestSuite(deleteDoc) {
+  beforeEach(function (done) {
+    this.project_id = ObjectId()
+    this.doc_id = ObjectId()
+    this.lines = ['original', 'lines']
+    this.version = 42
+    this.ranges = []
+    return DocstoreApp.ensureRunning(() => {
+      return DocstoreClient.createDoc(
+        this.project_id,
+        this.doc_id,
+        this.lines,
+        this.version,
+        this.ranges,
+        error => {
+          if (error != null) {
+            throw error
+          }
+          return done()
+        }
+      )
+    })
+  })
+
+  it('should show as not deleted on /deleted', function (done) {
+    DocstoreClient.isDocDeleted(
+      this.project_id,
+      this.doc_id,
+      (error, res, body) => {
+        if (error) return done(error)
+        expect(res.statusCode).to.equal(200)
+        expect(body).to.have.property('deleted').to.equal(false)
+        done()
+      }
+    )
+  })
+
+  describe('when the doc exists', function () {
+    beforeEach(function (done) {
+      deleteDoc(this.project_id, this.doc_id, (error, res, doc) => {
+        this.res = res
+        return done()
+      })
+    })
+
+    afterEach(function (done) {
+      return db.docs.remove({ _id: this.doc_id }, done)
+    })
+
+    it('should mark the doc as deleted on /deleted', function (done) {
+      DocstoreClient.isDocDeleted(
+        this.project_id,
+        this.doc_id,
+        (error, res, body) => {
+          if (error) return done(error)
+          expect(res.statusCode).to.equal(200)
+          expect(body).to.have.property('deleted').to.equal(true)
+          done()
+        }
+      )
+    })
+
+    it('should insert a deleted doc into the docs collection', function (done) {
+      return db.docs.find({ _id: this.doc_id }).toArray((error, docs) => {
+        docs[0]._id.should.deep.equal(this.doc_id)
+        docs[0].lines.should.deep.equal(this.lines)
+        docs[0].deleted.should.equal(true)
+        return done()
+      })
+    })
+
+    it('should not export the doc to s3', function (done) {
+      setTimeout(() => {
+        DocstoreClient.getS3Doc(this.project_id, this.doc_id, error => {
+          expect(error).to.be.instanceOf(Errors.NotFoundError)
+          done()
+        })
+      }, 1000)
+    })
+  })
+
+  describe('when archiveOnSoftDelete is enabled', function () {
+    let archiveOnSoftDelete
+    beforeEach('overwrite settings', function () {
+      archiveOnSoftDelete = Settings.docstore.archiveOnSoftDelete
+      Settings.docstore.archiveOnSoftDelete = true
+    })
+    afterEach('restore settings', function () {
+      Settings.docstore.archiveOnSoftDelete = archiveOnSoftDelete
+    })
+
+    beforeEach('delete Doc', function (done) {
+      deleteDoc(this.project_id, this.doc_id, (error, res) => {
+        this.res = res
+        done()
+      })
+    })
+
+    beforeEach(function waitForBackgroundFlush(done) {
+      setTimeout(done, 500)
+    })
+
+    afterEach(function cleanupDoc(done) {
+      db.docs.remove({ _id: this.doc_id }, done)
+    })
+
+    it('should set the deleted flag in the doc', function (done) {
+      db.docs.findOne({ _id: this.doc_id }, (error, doc) => {
+        if (error) {
+          return done(error)
+        }
+        expect(doc.deleted).to.equal(true)
+        done()
+      })
+    })
+
+    it('should set inS3 and unset lines and ranges in the doc', function (done) {
+      db.docs.findOne({ _id: this.doc_id }, (error, doc) => {
+        if (error) {
+          return done(error)
+        }
+        expect(doc.lines).to.not.exist
+        expect(doc.ranges).to.not.exist
+        expect(doc.inS3).to.equal(true)
+        done()
+      })
+    })
+
+    it('should set the doc in s3 correctly', function (done) {
+      DocstoreClient.getS3Doc(this.project_id, this.doc_id, (error, s3_doc) => {
+        if (error) {
+          return done(error)
+        }
+        expect(s3_doc.lines).to.deep.equal(this.lines)
+        expect(s3_doc.ranges).to.deep.equal(this.ranges)
+        done()
+      })
+    })
+  })
+
+  describe('when the doc exists in another project', function () {
+    const otherProjectId = ObjectId()
+
+    it('should show as not existing on /deleted', function (done) {
+      DocstoreClient.isDocDeleted(otherProjectId, this.doc_id, (error, res) => {
+        if (error) return done(error)
+        expect(res.statusCode).to.equal(404)
+        done()
+      })
+    })
+
+    it('should return a 404 when trying to delete', function (done) {
+      deleteDoc(otherProjectId, this.doc_id, (error, res) => {
+        if (error) return done(error)
+        expect(res.statusCode).to.equal(404)
+        done()
+      })
+    })
+  })
+
+  return describe('when the doc does not exist', function () {
+    it('should show as not existing on /deleted', function (done) {
+      const missing_doc_id = ObjectId()
+      DocstoreClient.isDocDeleted(
+        this.project_id,
+        missing_doc_id,
+        (error, res) => {
+          if (error) return done(error)
+          expect(res.statusCode).to.equal(404)
+          done()
+        }
+      )
+    })
+
+    return it('should return a 404', function (done) {
+      const missing_doc_id = ObjectId()
+      deleteDoc(this.project_id, missing_doc_id, (error, res, doc) => {
+        res.statusCode.should.equal(404)
+        return done()
+      })
+    })
+  })
+}
+
+describe('Delete via PATCH', function () {
+  deleteTestSuite(DocstoreClient.deleteDoc)
+
+  describe('when providing a custom doc name in the delete request', function () {
+    beforeEach(function (done) {
+      DocstoreClient.deleteDocWithName(
+        this.project_id,
+        this.doc_id,
+        'wombat.tex',
+        done
+      )
+    })
+
+    it('should insert the doc name into the docs collection', function (done) {
+      db.docs.find({ _id: this.doc_id }).toArray((error, docs) => {
+        if (error) return done(error)
+        expect(docs[0].name).to.equal('wombat.tex')
+        done()
+      })
+    })
+  })
+
+  describe('when providing a custom deletedAt date in the delete request', function () {
+    beforeEach('record date and delay', function (done) {
+      this.deletedAt = new Date()
+      setTimeout(done, 5)
+    })
+
+    beforeEach('perform deletion with past date', function (done) {
+      DocstoreClient.deleteDocWithDate(
+        this.project_id,
+        this.doc_id,
+        this.deletedAt,
+        done
+      )
+    })
+
+    it('should insert the date into the docs collection', function (done) {
+      db.docs.find({ _id: this.doc_id }).toArray((error, docs) => {
+        if (error) return done(error)
+        expect(docs[0].deletedAt.toISOString()).to.equal(
+          this.deletedAt.toISOString()
+        )
+        done()
+      })
+    })
+  })
+
+  describe('when providing no doc name in the delete request', function () {
+    beforeEach(function (done) {
+      DocstoreClient.deleteDocWithName(
+        this.project_id,
+        this.doc_id,
+        '',
+        (error, res) => {
+          this.res = res
+          done(error)
+        }
+      )
+    })
+
+    it('should reject the request', function () {
+      expect(this.res.statusCode).to.equal(400)
+    })
+  })
+
+  describe('when providing no date in the delete request', function () {
+    beforeEach(function (done) {
+      DocstoreClient.deleteDocWithDate(
+        this.project_id,
+        this.doc_id,
+        '',
+        (error, res) => {
+          this.res = res
+          done(error)
+        }
+      )
+    })
+
+    it('should reject the request', function () {
+      expect(this.res.statusCode).to.equal(400)
+    })
+  })
+
+  describe('before deleting anything', function () {
+    it('should show nothing in deleted docs response', function (done) {
+      DocstoreClient.getAllDeletedDocs(
+        this.project_id,
+        (error, deletedDocs) => {
+          if (error) return done(error)
+          expect(deletedDocs).to.deep.equal([])
+          done()
+        }
+      )
+    })
+  })
+
+  describe('when the doc gets a name on delete', function () {
+    beforeEach(function (done) {
+      DocstoreClient.deleteDoc(this.project_id, this.doc_id, done)
+    })
+
+    it('should show the doc in deleted docs response', function (done) {
+      DocstoreClient.getAllDeletedDocs(
+        this.project_id,
+        (error, deletedDocs) => {
+          if (error) return done(error)
+          expect(deletedDocs).to.deep.equal([
+            { _id: this.doc_id.toString(), name: 'main.tex' },
+          ])
+          done()
+        }
+      )
+    })
+
+    describe('after deleting multiple docs', function () {
+      beforeEach('create doc2', function (done) {
+        this.doc_id2 = ObjectId()
+        DocstoreClient.createDoc(
+          this.project_id,
+          this.doc_id2,
+          this.lines,
+          this.version,
+          this.ranges,
+          done
+        )
+      })
+      beforeEach('delete doc2', function (done) {
+        DocstoreClient.deleteDocWithName(
+          this.project_id,
+          this.doc_id2,
+          'two.tex',
+          done
+        )
+      })
+      beforeEach('create doc3', function (done) {
+        this.doc_id3 = ObjectId()
+        DocstoreClient.createDoc(
+          this.project_id,
+          this.doc_id3,
+          this.lines,
+          this.version,
+          this.ranges,
+          done
+        )
+      })
+      beforeEach('delete doc3', function (done) {
+        DocstoreClient.deleteDocWithName(
+          this.project_id,
+          this.doc_id3,
+          'three.tex',
+          done
+        )
+      })
+      it('should show all the docs as deleted', function (done) {
+        DocstoreClient.getAllDeletedDocs(
+          this.project_id,
+          (error, deletedDocs) => {
+            if (error) return done(error)
+
+            expect(deletedDocs).to.deep.equal([
+              { _id: this.doc_id3.toString(), name: 'three.tex' },
+              { _id: this.doc_id2.toString(), name: 'two.tex' },
+              { _id: this.doc_id.toString(), name: 'main.tex' },
+            ])
+            done()
+          }
+        )
+      })
+
+      describe('with one more than max_deleted_docs permits', function () {
+        let maxDeletedDocsBefore
+        beforeEach(function () {
+          maxDeletedDocsBefore = Settings.max_deleted_docs
+          Settings.max_deleted_docs = 2
+        })
+        afterEach(function () {
+          Settings.max_deleted_docs = maxDeletedDocsBefore
+        })
+
+        it('should omit the first deleted doc', function (done) {
+          DocstoreClient.getAllDeletedDocs(
+            this.project_id,
+            (error, deletedDocs) => {
+              if (error) return done(error)
+
+              expect(deletedDocs).to.deep.equal([
+                { _id: this.doc_id3.toString(), name: 'three.tex' },
+                { _id: this.doc_id2.toString(), name: 'two.tex' },
+                // dropped main.tex
+              ])
+              done()
+            }
+          )
+        })
+      })
+    })
+  })
+})
+
+describe("Destroying a project's documents", function () {
+  describe('when the doc exists', function () {
+    beforeEach(function (done) {
+      return db.docOps.insert(
+        { doc_id: ObjectId(this.doc_id), version: 1 },
+        function (err) {
+          if (err != null) {
+            return done(err)
+          }
+          return DocstoreClient.destroyAllDoc(this.project_id, done)
+        }
+      )
+    })
+
+    it('should remove the doc from the docs collection', function (done) {
+      return db.docs.find({ _id: this.doc_id }).toArray((err, docs) => {
+        expect(err).not.to.exist
+        expect(docs).to.deep.equal([])
+        return done()
+      })
+    })
+
+    return it('should remove the docOps from the docOps collection', function (done) {
+      return db.docOps.find({ doc_id: this.doc_id }).toArray((err, docOps) => {
+        expect(err).not.to.exist
+        expect(docOps).to.deep.equal([])
+        return done()
+      })
+    })
+  })
+
+  return describe('when the doc is archived', function () {
+    beforeEach(function (done) {
+      return DocstoreClient.archiveAllDoc(this.project_id, err => {
+        if (err != null) {
+          return done(err)
+        }
+        return DocstoreClient.destroyAllDoc(this.project_id, done)
+      })
+    })
+
+    it('should remove the doc from the docs collection', function (done) {
+      return db.docs.find({ _id: this.doc_id }).toArray((err, docs) => {
+        expect(err).not.to.exist
+        expect(docs).to.deep.equal([])
+        return done()
+      })
+    })
+
+    it('should remove the docOps from the docOps collection', function (done) {
+      return db.docOps.find({ doc_id: this.doc_id }).toArray((err, docOps) => {
+        expect(err).not.to.exist
+        expect(docOps).to.deep.equal([])
+        return done()
+      })
+    })
+
+    return it('should remove the doc contents from s3', function (done) {
+      return DocstoreClient.getS3Doc(this.project_id, this.doc_id, error => {
+        expect(error).to.be.instanceOf(Errors.NotFoundError)
+        done()
+      })
+    })
+  })
+})

services/docstore/test/acceptance/js/GettingAllDocsTests.js

@@ -0,0 +1,112 @@
+/* eslint-disable
+    handle-callback-err,
+    no-unused-vars,
+*/
+// TODO: This file was created by bulk-decaffeinate.
+// Fix any style issues and re-enable lint.
+/*
+ * decaffeinate suggestions:
+ * DS101: Remove unnecessary use of Array.from
+ * DS102: Remove unnecessary code created because of implicit returns
+ * DS207: Consider shorter variations of null checks
+ * Full docs: https://github.com/decaffeinate/decaffeinate/blob/master/docs/suggestions.md
+ */
+const sinon = require('sinon')
+const { ObjectId } = require('mongodb')
+const async = require('async')
+const DocstoreApp = require('./helpers/DocstoreApp')
+
+const DocstoreClient = require('./helpers/DocstoreClient')
+
+describe('Getting all docs', function () {
+  beforeEach(function (done) {
+    this.project_id = ObjectId()
+    this.docs = [
+      {
+        _id: ObjectId(),
+        lines: ['one', 'two', 'three'],
+        ranges: { mock: 'one' },
+        rev: 2,
+      },
+      {
+        _id: ObjectId(),
+        lines: ['aaa', 'bbb', 'ccc'],
+        ranges: { mock: 'two' },
+        rev: 4,
+      },
+      {
+        _id: ObjectId(),
+        lines: ['111', '222', '333'],
+        ranges: { mock: 'three' },
+        rev: 6,
+      },
+    ]
+    this.deleted_doc = {
+      _id: ObjectId(),
+      lines: ['deleted'],
+      ranges: { mock: 'four' },
+      rev: 8,
+    }
+    const version = 42
+    const jobs = Array.from(this.docs).map(doc =>
+      (doc => {
+        return callback => {
+          return DocstoreClient.createDoc(
+            this.project_id,
+            doc._id,
+            doc.lines,
+            version,
+            doc.ranges,
+            callback
+          )
+        }
+      })(doc)
+    )
+    jobs.push(cb => {
+      return DocstoreClient.createDoc(
+        this.project_id,
+        this.deleted_doc._id,
+        this.deleted_doc.lines,
+        version,
+        this.deleted_doc.ranges,
+        err => {
+          return DocstoreClient.deleteDoc(
+            this.project_id,
+            this.deleted_doc._id,
+            cb
+          )
+        }
+      )
+    })
+    jobs.unshift(cb => DocstoreApp.ensureRunning(cb))
+    return async.series(jobs, done)
+  })
+
+  it('getAllDocs should return all the (non-deleted) docs', function (done) {
+    return DocstoreClient.getAllDocs(this.project_id, (error, res, docs) => {
+      if (error != null) {
+        throw error
+      }
+      docs.length.should.equal(this.docs.length)
+      for (let i = 0; i < docs.length; i++) {
+        const doc = docs[i]
+        doc.lines.should.deep.equal(this.docs[i].lines)
+      }
+      return done()
+    })
+  })
+
+  return it('getAllRanges should return all the (non-deleted) doc ranges', function (done) {
+    return DocstoreClient.getAllRanges(this.project_id, (error, res, docs) => {
+      if (error != null) {
+        throw error
+      }
+      docs.length.should.equal(this.docs.length)
+      for (let i = 0; i < docs.length; i++) {
+        const doc = docs[i]
+        doc.ranges.should.deep.equal(this.docs[i].ranges)
+      }
+      return done()
+    })
+  })
+})

services/docstore/test/acceptance/js/GettingDocsFromArchiveTest.js

@@ -0,0 +1,127 @@
+const Settings = require('@overleaf/settings')
+const { ObjectId } = require('../../../app/js/mongodb')
+const DocstoreApp = require('./helpers/DocstoreApp')
+const DocstoreClient = require('./helpers/DocstoreClient')
+const { Storage } = require('@google-cloud/storage')
+
+describe('Getting A Doc from Archive', function () {
+  before(function (done) {
+    return DocstoreApp.ensureRunning(done)
+  })
+
+  before(async function () {
+    const storage = new Storage(Settings.docstore.gcs.endpoint)
+    await storage.createBucket(Settings.docstore.bucket)
+    await storage.createBucket(`${Settings.docstore.bucket}-deleted`)
+  })
+
+  describe('for an archived doc', function () {
+    before(function (done) {
+      this.project_id = ObjectId()
+      this.timeout(1000 * 30)
+      this.doc = {
+        _id: ObjectId(),
+        lines: ['foo', 'bar'],
+        ranges: {},
+        version: 2,
+      }
+      DocstoreClient.createDoc(
+        this.project_id,
+        this.doc._id,
+        this.doc.lines,
+        this.doc.version,
+        this.doc.ranges,
+        error => {
+          if (error) {
+            return done(error)
+          }
+          DocstoreClient.archiveDocById(
+            this.project_id,
+            this.doc._id,
+            (error, res) => {
+              this.res = res
+              if (error) {
+                return done(error)
+              }
+              done()
+            }
+          )
+        }
+      )
+    })
+
+    it('should successully archive the doc', function (done) {
+      this.res.statusCode.should.equal(204)
+      done()
+    })
+
+    it('should return the doc lines and version from persistent storage', function (done) {
+      return DocstoreClient.peekDoc(
+        this.project_id,
+        this.doc._id,
+        {},
+        (error, res, doc) => {
+          res.statusCode.should.equal(200)
+          res.headers['x-doc-status'].should.equal('archived')
+          doc.lines.should.deep.equal(this.doc.lines)
+          doc.version.should.equal(this.doc.version)
+          doc.ranges.should.deep.equal(this.doc.ranges)
+          return done()
+        }
+      )
+    })
+
+    it('should return the doc lines and version from persistent storage on subsequent requests', function (done) {
+      return DocstoreClient.peekDoc(
+        this.project_id,
+        this.doc._id,
+        {},
+        (error, res, doc) => {
+          res.statusCode.should.equal(200)
+          res.headers['x-doc-status'].should.equal('archived')
+          doc.lines.should.deep.equal(this.doc.lines)
+          doc.version.should.equal(this.doc.version)
+          doc.ranges.should.deep.equal(this.doc.ranges)
+          return done()
+        }
+      )
+    })
+
+    describe('for an non-archived doc', function () {
+      before(function (done) {
+        this.project_id = ObjectId()
+        this.timeout(1000 * 30)
+        this.doc = {
+          _id: ObjectId(),
+          lines: ['foo', 'bar'],
+          ranges: {},
+          version: 2,
+        }
+        DocstoreClient.createDoc(
+          this.project_id,
+          this.doc._id,
+          this.doc.lines,
+          this.doc.version,
+          this.doc.ranges,
+          done
+        )
+      })
+
+      it('should return the doc lines and version from mongo', function (done) {
+        return DocstoreClient.peekDoc(
+          this.project_id,
+          this.doc._id,
+          {},
+          (error, res, doc) => {
+            res.statusCode.should.equal(200)
+            res.headers['x-doc-status'].should.equal('active')
+            doc.lines.should.deep.equal(this.doc.lines)
+            doc.version.should.equal(this.doc.version)
+            doc.ranges.should.deep.equal(this.doc.ranges)
+            return done()
+          }
+        )
+      })
+    })
+  })
+})

services/docstore/test/acceptance/js/GettingDocsTests.js

@@ -0,0 +1,135 @@
+/* eslint-disable
+    camelcase,
+    handle-callback-err,
+    no-unused-vars,
+*/
+// TODO: This file was created by bulk-decaffeinate.
+// Fix any style issues and re-enable lint.
+/*
+ * decaffeinate suggestions:
+ * DS102: Remove unnecessary code created because of implicit returns
+ * DS207: Consider shorter variations of null checks
+ * Full docs: https://github.com/decaffeinate/decaffeinate/blob/master/docs/suggestions.md
+ */
+const sinon = require('sinon')
+const { ObjectId } = require('mongodb')
+const DocstoreApp = require('./helpers/DocstoreApp')
+
+const DocstoreClient = require('./helpers/DocstoreClient')
+
+describe('Getting a doc', function () {
+  beforeEach(function (done) {
+    this.project_id = ObjectId()
+    this.doc_id = ObjectId()
+    this.lines = ['original', 'lines']
+    this.version = 42
+    this.ranges = {
+      changes: [
+        {
+          id: ObjectId().toString(),
+          op: { i: 'foo', p: 3 },
+          meta: {
+            user_id: ObjectId().toString(),
+            ts: new Date().toString(),
+          },
+        },
+      ],
+    }
+    return DocstoreApp.ensureRunning(() => {
+      return DocstoreClient.createDoc(
+        this.project_id,
+        this.doc_id,
+        this.lines,
+        this.version,
+        this.ranges,
+        error => {
+          if (error != null) {
+            throw error
+          }
+          return done()
+        }
+      )
+    })
+  })
+
+  describe('when the doc exists', function () {
+    return it('should get the doc lines and version', function (done) {
+      return DocstoreClient.getDoc(
+        this.project_id,
+        this.doc_id,
+        {},
+        (error, res, doc) => {
+          doc.lines.should.deep.equal(this.lines)
+          doc.version.should.equal(this.version)
+          doc.ranges.should.deep.equal(this.ranges)
+          return done()
+        }
+      )
+    })
+  })
+
+  describe('when the doc does not exist', function () {
+    return it('should return a 404', function (done) {
+      const missing_doc_id = ObjectId()
+      return DocstoreClient.getDoc(
+        this.project_id,
+        missing_doc_id,
+        {},
+        (error, res, doc) => {
+          res.statusCode.should.equal(404)
+          return done()
+        }
+      )
+    })
+  })
+
+  return describe('when the doc is a deleted doc', function () {
+    beforeEach(function (done) {
+      this.deleted_doc_id = ObjectId()
+      return DocstoreClient.createDoc(
+        this.project_id,
+        this.deleted_doc_id,
+        this.lines,
+        this.version,
+        this.ranges,
+        error => {
+          if (error != null) {
+            throw error
+          }
+          return DocstoreClient.deleteDoc(
+            this.project_id,
+            this.deleted_doc_id,
+            done
+          )
+        }
+      )
+    })
+
+    it('should return the doc', function (done) {
+      return DocstoreClient.getDoc(
+        this.project_id,
+        this.deleted_doc_id,
+        { include_deleted: true },
+        (error, res, doc) => {
+          doc.lines.should.deep.equal(this.lines)
+          doc.version.should.equal(this.version)
+          doc.ranges.should.deep.equal(this.ranges)
+          doc.deleted.should.equal(true)
+          return done()
+        }
+      )
+    })
+
+    return it('should return a 404 when the query string is not set', function (done) {
+      return DocstoreClient.getDoc(
+        this.project_id,
+        this.deleted_doc_id,
+        {},
+        (error, res, doc) => {
+          res.statusCode.should.equal(404)
+          return done()
+        }
+      )
+    })
+  })
+})

services/docstore/test/acceptance/js/UpdatingDocsTests.js

@@ -0,0 +1,497 @@
+/* eslint-disable
+    handle-callback-err,
+    no-unused-vars,
+*/
+// TODO: This file was created by bulk-decaffeinate.
+// Fix any style issues and re-enable lint.
+/*
+ * decaffeinate suggestions:
+ * DS102: Remove unnecessary code created because of implicit returns
+ * DS207: Consider shorter variations of null checks
+ * Full docs: https://github.com/decaffeinate/decaffeinate/blob/master/docs/suggestions.md
+ */
+const sinon = require('sinon')
+const { ObjectId } = require('mongodb')
+const DocstoreApp = require('./helpers/DocstoreApp')
+
+const DocstoreClient = require('./helpers/DocstoreClient')
+
+describe('Applying updates to a doc', function () {
+  beforeEach(function (done) {
+    this.project_id = ObjectId()
+    this.doc_id = ObjectId()
+    this.originalLines = ['original', 'lines']
+    this.newLines = ['new', 'lines']
+    this.originalRanges = {
+      changes: [
+        {
+          id: ObjectId().toString(),
+          op: { i: 'foo', p: 3 },
+          meta: {
+            user_id: ObjectId().toString(),
+            ts: new Date().toString(),
+          },
+        },
+      ],
+    }
+    this.newRanges = {
+      changes: [
+        {
+          id: ObjectId().toString(),
+          op: { i: 'bar', p: 6 },
+          meta: {
+            user_id: ObjectId().toString(),
+            ts: new Date().toString(),
+          },
+        },
+      ],
+    }
+    this.version = 42
+    return DocstoreApp.ensureRunning(() => {
+      return DocstoreClient.createDoc(
+        this.project_id,
+        this.doc_id,
+        this.originalLines,
+        this.version,
+        this.originalRanges,
+        error => {
+          if (error != null) {
+            throw error
+          }
+          return done()
+        }
+      )
+    })
+  })
+
+  describe('when nothing has been updated', function () {
+    beforeEach(function (done) {
+      return DocstoreClient.updateDoc(
+        this.project_id,
+        this.doc_id,
+        this.originalLines,
+        this.version,
+        this.originalRanges,
+        (error, res, body) => {
+          this.body = body
+          return done()
+        }
+      )
+    })
+
+    it('should return modified = false', function () {
+      return this.body.modified.should.equal(false)
+    })
+
+    return it('should not update the doc in the API', function (done) {
+      return DocstoreClient.getDoc(
+        this.project_id,
+        this.doc_id,
+        {},
+        (error, res, doc) => {
+          doc.lines.should.deep.equal(this.originalLines)
+          doc.version.should.equal(this.version)
+          doc.ranges.should.deep.equal(this.originalRanges)
+          return done()
+        }
+      )
+    })
+  })
+
+  describe('when the lines have changed', function () {
+    beforeEach(function (done) {
+      return DocstoreClient.updateDoc(
+        this.project_id,
+        this.doc_id,
+        this.newLines,
+        this.version,
+        this.originalRanges,
+        (error, res, body) => {
+          this.body = body
+          return done()
+        }
+      )
+    })
+
+    it('should return modified = true', function () {
+      return this.body.modified.should.equal(true)
+    })
+
+    it('should return the rev', function () {
+      return this.body.rev.should.equal(2)
+    })
+
+    return it('should update the doc in the API', function (done) {
+      return DocstoreClient.getDoc(
+        this.project_id,
+        this.doc_id,
+        {},
+        (error, res, doc) => {
+          doc.lines.should.deep.equal(this.newLines)
+          doc.version.should.equal(this.version)
+          doc.ranges.should.deep.equal(this.originalRanges)
+          return done()
+        }
+      )
+    })
+  })
+
+  describe('when the version has changed', function () {
+    beforeEach(function (done) {
+      return DocstoreClient.updateDoc(
+        this.project_id,
+        this.doc_id,
+        this.originalLines,
+        this.version + 1,
+        this.originalRanges,
+        (error, res, body) => {
+          this.body = body
+          return done()
+        }
+      )
+    })
+
+    it('should return modified = true', function () {
+      return this.body.modified.should.equal(true)
+    })
+
+    it('should return the rev', function () {
+      return this.body.rev.should.equal(1)
+    })
+
+    return it('should update the doc in the API', function (done) {
+      return DocstoreClient.getDoc(
+        this.project_id,
+        this.doc_id,
+        {},
+        (error, res, doc) => {
+          doc.lines.should.deep.equal(this.originalLines)
+          doc.version.should.equal(this.version + 1)
+          doc.ranges.should.deep.equal(this.originalRanges)
+          return done()
+        }
+      )
+    })
+  })
+
+  describe('when the ranges have changed', function () {
+    beforeEach(function (done) {
+      return DocstoreClient.updateDoc(
+        this.project_id,
+        this.doc_id,
+        this.originalLines,
+        this.version,
+        this.newRanges,
+        (error, res, body) => {
+          this.body = body
+          return done()
+        }
+      )
+    })
+
+    it('should return modified = true', function () {
+      return this.body.modified.should.equal(true)
+    })
+
+    it('should return the rev', function () {
+      return this.body.rev.should.equal(2)
+    })
+
+    return it('should update the doc in the API', function (done) {
+      return DocstoreClient.getDoc(
+        this.project_id,
+        this.doc_id,
+        {},
+        (error, res, doc) => {
+          doc.lines.should.deep.equal(this.originalLines)
+          doc.version.should.equal(this.version)
+          doc.ranges.should.deep.equal(this.newRanges)
+          return done()
+        }
+      )
+    })
+  })
+
+  describe('when the doc does not exist', function () {
+    beforeEach(function (done) {
+      this.missing_doc_id = ObjectId()
+      return DocstoreClient.updateDoc(
+        this.project_id,
+        this.missing_doc_id,
+        this.originalLines,
+        0,
+        this.originalRanges,
+        (error, res, body) => {
+          this.res = res
+          this.body = body
+          return done()
+        }
+      )
+    })
+
+    it('should create the doc', function () {
+      return this.body.rev.should.equal(1)
+    })
+
+    return it('should be retreivable', function (done) {
+      return DocstoreClient.getDoc(
+        this.project_id,
+        this.missing_doc_id,
+        {},
+        (error, res, doc) => {
+          doc.lines.should.deep.equal(this.originalLines)
+          doc.version.should.equal(0)
+          doc.ranges.should.deep.equal(this.originalRanges)
+          return done()
+        }
+      )
+    })
+  })
+
+  describe('when malformed doc lines are provided', function () {
+    describe('when the lines are not an array', function () {
+      beforeEach(function (done) {
+        return DocstoreClient.updateDoc(
+          this.project_id,
+          this.doc_id,
+          { foo: 'bar' },
+          this.version,
+          this.originalRanges,
+          (error, res, body) => {
+            this.res = res
+            this.body = body
+            return done()
+          }
+        )
+      })
+
+      it('should return 400', function () {
+        return this.res.statusCode.should.equal(400)
+      })
+
+      return it('should not update the doc in the API', function (done) {
+        return DocstoreClient.getDoc(
+          this.project_id,
+          this.doc_id,
+          {},
+          (error, res, doc) => {
+            doc.lines.should.deep.equal(this.originalLines)
+            return done()
+          }
+        )
+      })
+    })
+
+    return describe('when the lines are not present', function () {
+      beforeEach(function (done) {
+        return DocstoreClient.updateDoc(
+          this.project_id,
+          this.doc_id,
+          null,
+          this.version,
+          this.originalRanges,
+          (error, res, body) => {
+            this.res = res
+            this.body = body
+            return done()
+          }
+        )
+      })
+
+      it('should return 400', function () {
+        return this.res.statusCode.should.equal(400)
+      })
+
+      return it('should not update the doc in the API', function (done) {
+        return DocstoreClient.getDoc(
+          this.project_id,
+          this.doc_id,
+          {},
+          (error, res, doc) => {
+            doc.lines.should.deep.equal(this.originalLines)
+            return done()
+          }
+        )
+      })
+    })
+  })
+
+  describe('when no version is provided', function () {
+    beforeEach(function (done) {
+      return DocstoreClient.updateDoc(
+        this.project_id,
+        this.doc_id,
+        this.originalLines,
+        null,
+        this.originalRanges,
+        (error, res, body) => {
+          this.res = res
+          this.body = body
+          return done()
+        }
+      )
+    })
+
+    it('should return 400', function () {
+      return this.res.statusCode.should.equal(400)
+    })
+
+    return it('should not update the doc in the API', function (done) {
+      return DocstoreClient.getDoc(
+        this.project_id,
+        this.doc_id,
+        {},
+        (error, res, doc) => {
+          doc.lines.should.deep.equal(this.originalLines)
+          doc.version.should.equal(this.version)
+          return done()
+        }
+      )
+    })
+  })
+
+  describe('when the content is large', function () {
+    beforeEach(function (done) {
+      const line = new Array(1025).join('x') // 1kb
+      this.largeLines = Array.apply(null, Array(1024)).map(() => line) // 1mb
+      return DocstoreClient.updateDoc(
+        this.project_id,
+        this.doc_id,
+        this.largeLines,
+        this.version,
+        this.originalRanges,
+        (error, res, body) => {
+          this.body = body
+          return done()
+        }
+      )
+    })
+
+    it('should return modified = true', function () {
+      return this.body.modified.should.equal(true)
+    })
+
+    return it('should update the doc in the API', function (done) {
+      return DocstoreClient.getDoc(
+        this.project_id,
+        this.doc_id,
+        {},
+        (error, res, doc) => {
+          doc.lines.should.deep.equal(this.largeLines)
+          return done()
+        }
+      )
+    })
+  })
+
+  describe('when there is a large json payload', function () {
+    beforeEach(function (done) {
+      const line = new Array(1025).join('x') // 1kb
+      this.largeLines = Array.apply(null, Array(1024)).map(() => line) // 1kb
+      this.originalRanges.padding = Array.apply(null, Array(2049)).map(
+        () => line
+      ) // 2mb + 1kb
+      return DocstoreClient.updateDoc(
+        this.project_id,
+        this.doc_id,
+        this.largeLines,
+        this.version,
+        this.originalRanges,
+        (error, res, body) => {
+          this.res = res
+          this.body = body
+          return done()
+        }
+      )
+    })
+
+    it('should return modified = true', function () {
+      return this.body.modified.should.equal(true)
+    })
+
+    return it('should update the doc in the API', function (done) {
+      return DocstoreClient.getDoc(
+        this.project_id,
+        this.doc_id,
+        {},
+        (error, res, doc) => {
+          doc.lines.should.deep.equal(this.largeLines)
+          return done()
+        }
+      )
+    })
+  })
+
+  describe('when the document body is too large', function () {
+    beforeEach(function (done) {
+      const line = new Array(1025).join('x') // 1kb
+      this.largeLines = Array.apply(null, Array(2049)).map(() => line) // 2mb + 1kb
+      return DocstoreClient.updateDoc(
+        this.project_id,
+        this.doc_id,
+        this.largeLines,
+        this.version,
+        this.originalRanges,
+        (error, res, body) => {
+          this.res = res
+          this.body = body
+          return done()
+        }
+      )
+    })
+
+    it('should return 413', function () {
+      return this.res.statusCode.should.equal(413)
+    })
+
+    it('should report body too large', function () {
+      return this.res.body.should.equal('document body too large')
+    })
+
+    return it('should not update the doc in the API', function (done) {
+      return DocstoreClient.getDoc(
+        this.project_id,
+        this.doc_id,
+        {},
+        (error, res, doc) => {
+          doc.lines.should.deep.equal(this.originalLines)
+          return done()
+        }
+      )
+    })
+  })
+
+  return describe('when the json payload is too large', function () {
+    beforeEach(function (done) {
+      const line = new Array(1025).join('x') // 1kb
+      this.largeLines = Array.apply(null, Array(1024)).map(() => line) // 1kb
+      this.originalRanges.padding = Array.apply(null, Array(4096)).map(
+        () => line
+      ) // 4mb
+      return DocstoreClient.updateDoc(
+        this.project_id,
+        this.doc_id,
+        this.largeLines,
+        this.version,
+        this.originalRanges,
+        (error, res, body) => {
+          this.res = res
+          this.body = body
+          return done()
+        }
+      )
+    })
+
+    return it('should not update the doc in the API', function (done) {
+      return DocstoreClient.getDoc(
+        this.project_id,
+        this.doc_id,
+        {},
+        (error, res, doc) => {
+          doc.lines.should.deep.equal(this.originalLines)
+          return done()
+        }
+      )
+    })
+  })
+})

services/docstore/test/acceptance/js/helpers/DocstoreApp.js

@@ -0,0 +1,37 @@
+const app = require('../../../../app')
+const { waitForDb } = require('../../../../app/js/mongodb')
+require('logger-sharelatex').logger.level('error')
+const settings = require('@overleaf/settings')
+
+module.exports = {
+  running: false,
+  initing: false,
+  callbacks: [],
+  ensureRunning(callback) {
+    if (callback == null) {
+      callback = function (error) {}
+    }
+    if (this.running) {
+      return callback()
+    } else if (this.initing) {
+      return this.callbacks.push(callback)
+    }
+    this.initing = true
+    this.callbacks.push(callback)
+    waitForDb().then(() => {
+      return app.listen(settings.internal.docstore.port, 'localhost', error => {
+        if (error != null) {
+          throw error
+        }
+        this.running = true
+        return (() => {
+          const result = []
+          for (callback of Array.from(this.callbacks)) {
+            result.push(callback())
+          }
+          return result
+        })()
+      })
+    })
+  },
+}

services/docstore/test/acceptance/js/helpers/DocstoreClient.js

@@ -0,0 +1,195 @@
+let DocstoreClient
+const request = require('request').defaults({ jar: false })
+const settings = require('@overleaf/settings')
+const Persistor = require('../../../../app/js/PersistorManager')
+
+async function streamToString(stream) {
+  const chunks = []
+  return new Promise((resolve, reject) => {
+    stream.on('data', chunk => chunks.push(chunk))
+    stream.on('error', reject)
+    stream.on('end', () => resolve(Buffer.concat(chunks).toString('utf8')))
+  })
+}
+
+async function getStringFromPersistor(persistor, bucket, key) {
+  const stream = await persistor.getObjectStream(bucket, key, {})
+  stream.resume()
+  return streamToString(stream)
+}
+
+module.exports = DocstoreClient = {
+  createDoc(projectId, docId, lines, version, ranges, callback) {
+    return DocstoreClient.updateDoc(
+      projectId,
+      docId,
+      lines,
+      version,
+      ranges,
+      callback
+    )
+  },
+
+  getDoc(projectId, docId, qs, callback) {
+    request.get(
+      {
+        url: `http://localhost:${settings.internal.docstore.port}/project/${projectId}/doc/${docId}`,
+        json: true,
+        qs,
+      },
+      callback
+    )
+  },
+
+  peekDoc(projectId, docId, qs, callback) {
+    request.get(
+      {
+        url: `http://localhost:${settings.internal.docstore.port}/project/${projectId}/doc/${docId}/peek`,
+        json: true,
+        qs,
+      },
+      callback
+    )
+  },
+
+  isDocDeleted(projectId, docId, callback) {
+    request.get(
+      {
+        url: `http://localhost:${settings.internal.docstore.port}/project/${projectId}/doc/${docId}/deleted`,
+        json: true,
+      },
+      callback
+    )
+  },
+
+  getAllDocs(projectId, callback) {
+    request.get(
+      {
+        url: `http://localhost:${settings.internal.docstore.port}/project/${projectId}/doc`,
+        json: true,
+      },
+      (req, res, body) => {
+        callback(req, res, body)
+      }
+    )
+  },
+
+  getAllDeletedDocs(projectId, callback) {
+    request.get(
+      {
+        url: `http://localhost:${settings.internal.docstore.port}/project/${projectId}/doc-deleted`,
+        json: true,
+      },
+      (error, res, body) => {
+        if (error) return callback(error)
+        if (res.statusCode !== 200) {
+          return callback(new Error('unexpected statusCode'))
+        }
+        callback(null, body)
+      }
+    )
+  },
+
+  getAllRanges(projectId, callback) {
+    request.get(
+      {
+        url: `http://localhost:${settings.internal.docstore.port}/project/${projectId}/ranges`,
+        json: true,
+      },
+      callback
+    )
+  },
+
+  updateDoc(projectId, docId, lines, version, ranges, callback) {
+    return request.post(
+      {
+        url: `http://localhost:${settings.internal.docstore.port}/project/${projectId}/doc/${docId}`,
+        json: {
+          lines,
+          version,
+          ranges,
+        },
+      },
+      callback
+    )
+  },
+
+  deleteDoc(projectId, docId, callback) {
+    DocstoreClient.deleteDocWithDateAndName(
+      projectId,
+      docId,
+      new Date(),
+      'main.tex',
+      callback
+    )
+  },
+
+  deleteDocWithDate(projectId, docId, date, callback) {
+    DocstoreClient.deleteDocWithDateAndName(
+      projectId,
+      docId,
+      date,
+      'main.tex',
+      callback
+    )
+  },
+
+  deleteDocWithName(projectId, docId, name, callback) {
+    DocstoreClient.deleteDocWithDateAndName(
+      projectId,
+      docId,
+      new Date(),
+      name,
+      callback
+    )
+  },
+
+  deleteDocWithDateAndName(projectId, docId, deletedAt, name, callback) {
+    request.patch(
+      {
+        url: `http://localhost:${settings.internal.docstore.port}/project/${projectId}/doc/${docId}`,
+        json: { name, deleted: true, deletedAt },
+      },
+      callback
+    )
+  },
+
+  archiveAllDoc(projectId, callback) {
+    request.post(
+      {
+        url: `http://localhost:${settings.internal.docstore.port}/project/${projectId}/archive`,
+      },
+      callback
+    )
+  },
+
+  archiveDocById(projectId, docId, callback) {
+    request.post(
+      {
+        url: `http://localhost:${settings.internal.docstore.port}/project/${projectId}/doc/${docId}/archive`,
+      },
+      callback
+    )
+  },
+
+  destroyAllDoc(projectId, callback) {
+    request.post(
+      {
+        url: `http://localhost:${settings.internal.docstore.port}/project/${projectId}/destroy`,
+      },
+      callback
+    )
+  },
+
+  getS3Doc(projectId, docId, callback) {
+    getStringFromPersistor(
+      Persistor,
+      settings.docstore.bucket,
+      `${projectId}/${docId}`
+    )
+      .then(data => {
+        callback(null, JSON.parse(data))
+      })
+      .catch(callback)
+  },
+}

services/docstore/test/acceptance/scripts/full-test.sh

@@ -0,0 +1,23 @@
+#! /usr/bin/env bash
+
+# npm rebuild
+
+echo ">> Starting server..."
+
+grunt --no-color forever:app:start
+
+echo ">> Server started"
+
+sleep 20
+
+echo ">> Running acceptance tests..."
+grunt --no-color mochaTest:acceptance
+_test_exit_code=$?
+
+echo ">> Killing server"
+
+grunt --no-color forever:app:stop
+
+echo ">> Done"
+
+exit $_test_exit_code

services/docstore/test/setup.js

@@ -0,0 +1,42 @@
+const chai = require('chai')
+const sinon = require('sinon')
+const sinonChai = require('sinon-chai')
+const chaiAsPromised = require('chai-as-promised')
+const SandboxedModule = require('sandboxed-module')
+
+process.env.BACKEND = 'gcs'
+
+// Chai configuration
+chai.should()
+chai.use(sinonChai)
+chai.use(chaiAsPromised)
+
+// Global stubs
+const sandbox = sinon.createSandbox()
+const stubs = {
+  logger: {
+    log: sandbox.stub(),
+    warn: sandbox.stub(),
+    err: sandbox.stub(),
+    error: sandbox.stub(),
+    fatal: sandbox.stub(),
+  },
+}
+
+// SandboxedModule configuration
+SandboxedModule.configure({
+  requires: {
+    'logger-sharelatex': stubs.logger,
+  },
+  globals: { Buffer, JSON, console, process },
+})
+
+exports.mochaHooks = {
+  beforeEach() {
+    this.logger = stubs.logger
+  },
+
+  afterEach() {
+    sandbox.reset()
+  },
+}

services/docstore/test/unit/js/DocArchiveManagerTests.js

@@ -0,0 +1,595 @@
+const sinon = require('sinon')
+const { expect } = require('chai')
+const modulePath = '../../../app/js/DocArchiveManager.js'
+const SandboxedModule = require('sandboxed-module')
+const { ObjectId } = require('mongodb')
+const Errors = require('../../../app/js/Errors')
+
+describe('DocArchiveManager', function () {
+  let DocArchiveManager,
+    PersistorManager,
+    MongoManager,
+    RangeManager,
+    Settings,
+    Crypto,
+    Streamifier,
+    HashDigest,
+    HashUpdate,
+    archivedDocs,
+    mongoDocs,
+    docJson,
+    md5Sum,
+    projectId,
+    readStream,
+    stream
+
+  beforeEach(function () {
+    md5Sum = 'decafbad'
+
+    RangeManager = {
+      jsonRangesToMongo: sinon.stub().returns({ mongo: 'ranges' }),
+    }
+    Settings = {
+      docstore: {
+        bucket: 'wombat',
+      },
+      parallelArchiveJobs: 3,
+      destroyBatchSize: 10,
+      destroyRetryCount: 3,
+    }
+    HashDigest = sinon.stub().returns(md5Sum)
+    HashUpdate = sinon.stub().returns({ digest: HashDigest })
+    Crypto = {
+      createHash: sinon.stub().returns({ update: HashUpdate }),
+    }
+    Streamifier = {
+      createReadStream: sinon.stub().returns({ stream: 'readStream' }),
+    }
+
+    projectId = ObjectId()
+    archivedDocs = [
+      {
+        _id: ObjectId(),
+        inS3: true,
+        rev: 2,
+      },
+      {
+        _id: ObjectId(),
+        inS3: true,
+        rev: 4,
+      },
+      {
+        _id: ObjectId(),
+        inS3: true,
+        rev: 6,
+      },
+    ]
+    mongoDocs = [
+      {
+        _id: ObjectId(),
+        lines: ['one', 'two', 'three'],
+        rev: 2,
+      },
+      {
+        _id: ObjectId(),
+        lines: ['aaa', 'bbb', 'ccc'],
+        rev: 4,
+      },
+      {
+        _id: ObjectId(),
+        inS3: true,
+        rev: 6,
+      },
+      {
+        _id: ObjectId(),
+        inS3: true,
+        rev: 6,
+      },
+      {
+        _id: ObjectId(),
+        lines: ['111', '222', '333'],
+        rev: 6,
+      },
+    ]
+
+    docJson = JSON.stringify({
+      lines: mongoDocs[0].lines,
+      ranges: mongoDocs[0].ranges,
+      schema_v: 1,
+    })
+
+    stream = {
+      on: sinon.stub(),
+      resume: sinon.stub(),
+    }
+    stream.on.withArgs('data').yields(Buffer.from(docJson, 'utf8'))
+    stream.on.withArgs('end').yields()
+
+    readStream = {
+      stream: 'readStream',
+    }
+
+    PersistorManager = {
+      getObjectStream: sinon.stub().resolves(stream),
+      sendStream: sinon.stub().resolves(),
+      getObjectMd5Hash: sinon.stub().resolves(md5Sum),
+      deleteObject: sinon.stub().resolves(),
+    }
+
+    const getNonArchivedProjectDocs = sinon.stub()
+    getNonArchivedProjectDocs
+      .onCall(0)
+      .resolves(mongoDocs.filter(doc => !doc.inS3))
+    getNonArchivedProjectDocs.onCall(1).resolves([])
+
+    const getArchivedProjectDocs = sinon.stub()
+    getArchivedProjectDocs.onCall(0).resolves(archivedDocs)
+    getArchivedProjectDocs.onCall(1).resolves([])
+
+    MongoManager = {
+      promises: {
+        markDocAsArchived: sinon.stub().resolves(),
+        upsertIntoDocCollection: sinon.stub().resolves(),
+        getProjectsDocs: sinon.stub().resolves(mongoDocs),
+        getNonDeletedArchivedProjectDocs: getArchivedProjectDocs,
+        getNonArchivedProjectDocs,
+        getArchivedProjectDocs,
+        findDoc: sinon.stub().rejects(new Errors.NotFoundError()),
+        destroyDoc: sinon.stub().resolves(),
+      },
+    }
+    for (const mongoDoc of mongoDocs.concat(archivedDocs)) {
+      MongoManager.promises.findDoc
+        .withArgs(projectId, mongoDoc._id, sinon.match.any)
+        .resolves(mongoDoc)
+    }
+
+    DocArchiveManager = SandboxedModule.require(modulePath, {
+      requires: {
+        '@overleaf/settings': Settings,
+        crypto: Crypto,
+        streamifier: Streamifier,
+        './MongoManager': MongoManager,
+        './RangeManager': RangeManager,
+        './PersistorManager': PersistorManager,
+        './Errors': Errors,
+      },
+    })
+  })
+
+  describe('archiveDoc', function () {
+    it('should resolve when passed a valid document', async function () {
+      await expect(
+        DocArchiveManager.promises.archiveDoc(projectId, mongoDocs[0])
+      ).to.eventually.be.fulfilled
+    })
+
+    it('should throw an error if the doc has no lines', async function () {
+      const doc = mongoDocs[0]
+      doc.lines = null
+
+      await expect(
+        DocArchiveManager.promises.archiveDoc(projectId, doc)
+      ).to.eventually.be.rejectedWith('doc has no lines')
+    })
+
+    it('should add the schema version', async function () {
+      await DocArchiveManager.promises.archiveDoc(projectId, mongoDocs[1])
+      expect(Streamifier.createReadStream).to.have.been.calledWith(
+        sinon.match(/"schema_v":1/)
+      )
+    })
+
+    it('should calculate the hex md5 sum of the content', async function () {
+      const json = JSON.stringify({
+        lines: mongoDocs[0].lines,
+        ranges: mongoDocs[0].ranges,
+        schema_v: 1,
+      })
+
+      await DocArchiveManager.promises.archiveDoc(projectId, mongoDocs[0])
+
+      expect(Crypto.createHash).to.have.been.calledWith('md5')
+      expect(HashUpdate).to.have.been.calledWith(json)
+      expect(HashDigest).to.have.been.calledWith('hex')
+    })
+
+    it('should pass the md5 hash to the object persistor for verification', async function () {
+      await DocArchiveManager.promises.archiveDoc(projectId, mongoDocs[0])
+
+      expect(PersistorManager.sendStream).to.have.been.calledWith(
+        sinon.match.any,
+        sinon.match.any,
+        sinon.match.any,
+        { sourceMd5: md5Sum }
+      )
+    })
+
+    it('should pass the correct bucket and key to the persistor', async function () {
+      await DocArchiveManager.promises.archiveDoc(projectId, mongoDocs[0])
+
+      expect(PersistorManager.sendStream).to.have.been.calledWith(
+        Settings.docstore.bucket,
+        `${projectId}/${mongoDocs[0]._id}`
+      )
+    })
+
+    it('should create a stream from the encoded json and send it', async function () {
+      await DocArchiveManager.promises.archiveDoc(projectId, mongoDocs[0])
+      expect(Streamifier.createReadStream).to.have.been.calledWith(docJson)
+      expect(PersistorManager.sendStream).to.have.been.calledWith(
+        sinon.match.any,
+        sinon.match.any,
+        readStream
+      )
+    })
+
+    it('should mark the doc as archived', async function () {
+      await DocArchiveManager.promises.archiveDoc(projectId, mongoDocs[0])
+      expect(MongoManager.promises.markDocAsArchived).to.have.been.calledWith(
+        mongoDocs[0]._id,
+        mongoDocs[0].rev
+      )
+    })
+
+    describe('with null bytes in the result', function () {
+      const _stringify = JSON.stringify
+
+      beforeEach(function () {
+        JSON.stringify = sinon.stub().returns('{"bad": "\u0000"}')
+      })
+
+      afterEach(function () {
+        JSON.stringify = _stringify
+      })
+
+      it('should return an error', async function () {
+        await expect(
+          DocArchiveManager.promises.archiveDoc(projectId, mongoDocs[0])
+        ).to.eventually.be.rejectedWith('null bytes detected')
+      })
+    })
+  })
+
+  describe('unarchiveDoc', function () {
+    let docId
+
+    describe('when the doc is in S3', function () {
+      beforeEach(function () {
+        MongoManager.promises.findDoc = sinon.stub().resolves({ inS3: true })
+        docId = mongoDocs[0]._id
+      })
+
+      it('should resolve when passed a valid document', async function () {
+        await expect(DocArchiveManager.promises.unarchiveDoc(projectId, docId))
+          .to.eventually.be.fulfilled
+      })
+
+      it('should throw an error if the md5 does not match', async function () {
+        PersistorManager.getObjectMd5Hash.resolves('badf00d')
+        await expect(
+          DocArchiveManager.promises.unarchiveDoc(projectId, docId)
+        ).to.eventually.be.rejected.and.be.instanceof(Errors.Md5MismatchError)
+      })
+
+      it('should update the doc lines in mongo', async function () {
+        await DocArchiveManager.promises.unarchiveDoc(projectId, docId)
+        expect(
+          MongoManager.promises.upsertIntoDocCollection
+        ).to.have.been.calledWith(projectId, docId, {
+          lines: mongoDocs[0].lines,
+        })
+      })
+
+      it('should delete the doc in s3', async function () {
+        await DocArchiveManager.promises.unarchiveDoc(projectId, docId)
+        expect(PersistorManager.deleteObject).to.have.been.calledWith(
+          Settings.docstore.bucket,
+          `${projectId}/${docId}`
+        )
+      })
+
+      describe('doc contents', function () {
+        let mongoDoc, s3Doc
+
+        describe('when the doc has the old schema', function () {
+          beforeEach(function () {
+            mongoDoc = {
+              lines: ['doc', 'lines'],
+            }
+            s3Doc = ['doc', 'lines']
+            docJson = JSON.stringify(s3Doc)
+            stream.on.withArgs('data').yields(Buffer.from(docJson, 'utf8'))
+          })
+
+          it('should return the docs lines', async function () {
+            await DocArchiveManager.promises.unarchiveDoc(projectId, docId)
+            expect(
+              MongoManager.promises.upsertIntoDocCollection
+            ).to.have.been.calledWith(projectId, docId, mongoDoc)
+          })
+        })
+
+        describe('with the new schema and ranges', function () {
+          beforeEach(function () {
+            s3Doc = {
+              lines: ['doc', 'lines'],
+              ranges: { json: 'ranges' },
+              schema_v: 1,
+            }
+            mongoDoc = {
+              lines: ['doc', 'lines'],
+              ranges: { mongo: 'ranges' },
+            }
+            docJson = JSON.stringify(s3Doc)
+            stream.on.withArgs('data').yields(Buffer.from(docJson, 'utf8'))
+          })
+
+          it('should return the doc lines and ranges', async function () {
+            await DocArchiveManager.promises.unarchiveDoc(projectId, docId)
+            expect(
+              MongoManager.promises.upsertIntoDocCollection
+            ).to.have.been.calledWith(projectId, docId, mongoDoc)
+          })
+        })
+
+        describe('with the new schema and no ranges', function () {
+          beforeEach(function () {
+            s3Doc = {
+              lines: ['doc', 'lines'],
+              schema_v: 1,
+            }
+            mongoDoc = {
+              lines: ['doc', 'lines'],
+            }
+            docJson = JSON.stringify(s3Doc)
+            stream.on.withArgs('data').yields(Buffer.from(docJson, 'utf8'))
+          })
+
+          it('should return only the doc lines', async function () {
+            await DocArchiveManager.promises.unarchiveDoc(projectId, docId)
+            expect(
+              MongoManager.promises.upsertIntoDocCollection
+            ).to.have.been.calledWith(projectId, docId, mongoDoc)
+          })
+        })
+
+        describe('with an unrecognised schema', function () {
+          beforeEach(function () {
+            s3Doc = {
+              lines: ['doc', 'lines'],
+              schema_v: 2,
+            }
+            docJson = JSON.stringify(s3Doc)
+            stream.on.withArgs('data').yields(Buffer.from(docJson, 'utf8'))
+          })
+
+          it('should throw an error', async function () {
+            await expect(
+              DocArchiveManager.promises.unarchiveDoc(projectId, docId)
+            ).to.eventually.be.rejectedWith(
+              "I don't understand the doc format in s3"
+            )
+          })
+        })
+      })
+    })
+
+    it('should not do anything if the file is already unarchived', async function () {
+      MongoManager.promises.findDoc.resolves({ inS3: false })
+      await DocArchiveManager.promises.unarchiveDoc(projectId, docId)
+      expect(PersistorManager.getObjectStream).not.to.have.been.called
+    })
+
+    describe('when the file is removed while we are processing it', function () {
+      beforeEach(function () {
+        MongoManager.promises.findDoc = sinon.stub().resolves({ inS3: true })
+        MongoManager.promises.findDoc.onSecondCall().resolves({ inS3: false })
+      })
+
+      it('should not throw an error if the file is unarchived before we get for its hash', async function () {
+        PersistorManager.getObjectMd5Hash = sinon
+          .stub()
+          .rejects(new Errors.NotFoundError())
+        await expect(DocArchiveManager.promises.unarchiveDoc(projectId, docId))
+          .to.eventually.be.fulfilled
+        expect(PersistorManager.getObjectStream).not.to.have.been.called
+      })
+
+      it('should not throw an error if the file is unarchived before we download it', async function () {
+        PersistorManager.getObjectStream = sinon
+          .stub()
+          .rejects(new Errors.NotFoundError())
+        await expect(DocArchiveManager.promises.unarchiveDoc(projectId, docId))
+          .to.eventually.be.fulfilled
+        expect(MongoManager.promises.upsertIntoDocCollection).not.to.have.been
+          .called
+      })
+    })
+
+    it('should throw an error if the file is not found but is still listed as archived', async function () {
+      PersistorManager.getObjectStream = sinon
+        .stub()
+        .rejects(new Errors.NotFoundError())
+      await expect(
+        DocArchiveManager.promises.unarchiveDoc(projectId, docId)
+      ).to.eventually.be.rejected.and.be.instanceof(Errors.NotFoundError)
+    })
+  })
+
+  describe('destroyDoc', function () {
+    let docId
+
+    beforeEach(function () {
+      docId = mongoDocs[0]._id
+    })
+
+    it('should resolve when passed a valid document', async function () {
+      await expect(DocArchiveManager.promises.destroyDoc(projectId, docId)).to
+        .eventually.be.fulfilled
+    })
+
+    it('should throw a not found error when there is no document', async function () {
+      await expect(
+        DocArchiveManager.promises.destroyDoc(projectId, 'wombat')
+      ).to.eventually.be.rejected.and.be.instanceof(Errors.NotFoundError)
+    })
+
+    describe('when the doc is in s3', function () {
+      beforeEach(function () {
+        mongoDocs[0].inS3 = true
+      })
+
+      it('should delete the document from s3, if it is in s3', async function () {
+        await DocArchiveManager.promises.destroyDoc(projectId, docId)
+        expect(PersistorManager.deleteObject).to.have.been.calledWith(
+          Settings.docstore.bucket,
+          `${projectId}/${docId}`
+        )
+      })
+
+      it('should delete the doc in mongo', async function () {
+        await DocArchiveManager.promises.destroyDoc(projectId, docId)
+      })
+
+      describe('when the destroy request errors', function () {
+        beforeEach(function () {
+          mongoDocs[0].inS3 = true
+          PersistorManager.deleteObject.onFirstCall().rejects(new Error('1'))
+          PersistorManager.deleteObject.onSecondCall().rejects(new Error('2'))
+          PersistorManager.deleteObject.onThirdCall().resolves()
+        })
+
+        it('should retry', async function () {
+          await DocArchiveManager.promises.destroyDoc(projectId, docId)
+          expect(PersistorManager.deleteObject).to.have.been.calledWith(
+            Settings.docstore.bucket,
+            `${projectId}/${docId}`
+          )
+          expect(PersistorManager.deleteObject.callCount).to.equal(3)
+        })
+      })
+
+      describe('when the destroy request errors permanent', function () {
+        beforeEach(function () {
+          mongoDocs[0].inS3 = true
+          PersistorManager.deleteObject.rejects(new Error('permanent'))
+        })
+
+        it('should retry and fail eventually', async function () {
+          await expect(DocArchiveManager.promises.destroyDoc(projectId, docId))
+            .to.eventually.be.rejected
+          expect(PersistorManager.deleteObject).to.have.been.calledWith(
+            Settings.docstore.bucket,
+            `${projectId}/${docId}`
+          )
+          expect(PersistorManager.deleteObject.callCount).to.equal(4)
+        })
+      })
+    })
+
+    describe('when the doc is not in s3', function () {
+      beforeEach(function () {
+        mongoDocs[0].inS3 = false
+      })
+
+      it('should not delete the document from s3, if it is not in s3', async function () {
+        await DocArchiveManager.promises.destroyDoc(projectId, docId)
+        expect(PersistorManager.deleteObject).not.to.have.been.called
+      })
+
+      it('should delete the doc in mongo', async function () {
+        await DocArchiveManager.promises.destroyDoc(projectId, docId)
+      })
+    })
+  })
+
+  describe('archiveAllDocs', function () {
+    it('should resolve with valid arguments', async function () {
+      await expect(DocArchiveManager.promises.archiveAllDocs(projectId)).to
+        .eventually.be.fulfilled
+    })
+
+    it('should archive all project docs which are not in s3', async function () {
+      await DocArchiveManager.promises.archiveAllDocs(projectId)
+      // not inS3
+      expect(MongoManager.promises.markDocAsArchived).to.have.been.calledWith(
+        mongoDocs[0]._id
+      )
+      expect(MongoManager.promises.markDocAsArchived).to.have.been.calledWith(
+        mongoDocs[1]._id
+      )
+      expect(MongoManager.promises.markDocAsArchived).to.have.been.calledWith(
+        mongoDocs[4]._id
+      )
+
+      // inS3
+      expect(
+        MongoManager.promises.markDocAsArchived
+      ).not.to.have.been.calledWith(mongoDocs[2]._id)
+      expect(
+        MongoManager.promises.markDocAsArchived
+      ).not.to.have.been.calledWith(mongoDocs[3]._id)
+    })
+  })
+
+  describe('unArchiveAllDocs', function () {
+    it('should resolve with valid arguments', async function () {
+      await expect(DocArchiveManager.promises.unArchiveAllDocs(projectId)).to
+        .eventually.be.fulfilled
+    })
+
+    it('should unarchive all inS3 docs', async function () {
+      await DocArchiveManager.promises.unArchiveAllDocs(projectId)
+
+      for (const doc of archivedDocs) {
+        expect(PersistorManager.getObjectStream).to.have.been.calledWith(
+          Settings.docstore.bucket,
+          `${projectId}/${doc._id}`
+        )
+      }
+    })
+  })
+
+  describe('destroyAllDocs', function () {
+    beforeEach(function () {
+      MongoManager.promises.getProjectsDocs.onCall(0).resolves(mongoDocs)
+      MongoManager.promises.getProjectsDocs.onCall(1).resolves([])
+    })
+
+    it('should resolve with valid arguments', async function () {
+      await expect(DocArchiveManager.promises.destroyAllDocs(projectId)).to
+        .eventually.be.fulfilled
+    })
+
+    it('should delete all docs that are in s3 from s3', async function () {
+      await DocArchiveManager.promises.destroyAllDocs(projectId)
+
+      // not inS3
+      for (const index of [0, 1, 4]) {
+        expect(PersistorManager.deleteObject).not.to.have.been.calledWith(
+          Settings.docstore.bucket,
+          `${projectId}/${mongoDocs[index]._id}`
+        )
+      }
+
+      // inS3
+      for (const index of [2, 3]) {
+        expect(PersistorManager.deleteObject).to.have.been.calledWith(
+          Settings.docstore.bucket,
+          `${projectId}/${mongoDocs[index]._id}`
+        )
+      }
+    })
+
+    it('should destroy all docs in mongo', async function () {
+      await DocArchiveManager.promises.destroyAllDocs(projectId)
+
+      for (const mongoDoc of mongoDocs) {
+        expect(MongoManager.promises.destroyDoc).to.have.been.calledWith(
+          mongoDoc._id
+        )
+      }
+    })
+  })
+})

services/docstore/test/unit/js/DocManagerTests.js

@@ -0,0 +1,863 @@
+/* eslint-disable
+    camelcase,
+    handle-callback-err,
+    no-dupe-keys,
+    no-return-assign,
+    no-unused-vars,
+*/
+// TODO: This file was created by bulk-decaffeinate.
+// Fix any style issues and re-enable lint.
+/*
+ * decaffeinate suggestions:
+ * DS102: Remove unnecessary code created because of implicit returns
+ * Full docs: https://github.com/decaffeinate/decaffeinate/blob/master/docs/suggestions.md
+ */
+const SandboxedModule = require('sandboxed-module')
+const sinon = require('sinon')
+const { assert, expect } = require('chai')
+const modulePath = require('path').join(__dirname, '../../../app/js/DocManager')
+const { ObjectId } = require('mongodb')
+const Errors = require('../../../app/js/Errors')
+
+describe('DocManager', function () {
+  beforeEach(function () {
+    this.DocManager = SandboxedModule.require(modulePath, {
+      requires: {
+        './MongoManager': (this.MongoManager = {}),
+        './DocArchiveManager': (this.DocArchiveManager = {}),
+        './RangeManager': (this.RangeManager = {
+          jsonRangesToMongo(r) {
+            return r
+          },
+          shouldUpdateRanges: sinon.stub().returns(false),
+        }),
+        '@overleaf/settings': (this.settings = { docstore: {} }),
+        './Errors': Errors,
+      },
+    })
+    this.doc_id = ObjectId().toString()
+    this.project_id = ObjectId().toString()
+    this.another_project_id = ObjectId().toString()
+    this.callback = sinon.stub()
+    return (this.stubbedError = new Error('blew up'))
+  })
+
+  describe('getFullDoc', function () {
+    beforeEach(function () {
+      this.DocManager._getDoc = sinon.stub()
+      return (this.doc = {
+        _id: this.doc_id,
+        lines: ['2134'],
+      })
+    })
+
+    it('should call get doc with a quick filter', function (done) {
+      this.DocManager._getDoc.callsArgWith(3, null, this.doc)
+      return this.DocManager.getFullDoc(
+        this.project_id,
+        this.doc_id,
+        (err, doc) => {
+          doc.should.equal(this.doc)
+          this.DocManager._getDoc
+            .calledWith(this.project_id, this.doc_id, {
+              lines: true,
+              rev: true,
+              deleted: true,
+              version: true,
+              ranges: true,
+              inS3: true,
+            })
+            .should.equal(true)
+          return done()
+        }
+      )
+    })
+
+    return it('should return error when get doc errors', function (done) {
+      this.DocManager._getDoc.callsArgWith(3, 'error')
+      return this.DocManager.getFullDoc(
+        this.project_id,
+        this.doc_id,
+        (err, exist) => {
+          err.should.equal('error')
+          return done()
+        }
+      )
+    })
+  })
+
+  describe('getRawDoc', function () {
+    beforeEach(function () {
+      this.DocManager._getDoc = sinon.stub()
+      return (this.doc = { lines: ['2134'] })
+    })
+
+    it('should call get doc with a quick filter', function (done) {
+      this.DocManager._getDoc.callsArgWith(3, null, this.doc)
+      return this.DocManager.getDocLines(
+        this.project_id,
+        this.doc_id,
+        (err, doc) => {
+          doc.should.equal(this.doc)
+          this.DocManager._getDoc
+            .calledWith(this.project_id, this.doc_id, {
+              lines: true,
+              inS3: true,
+            })
+            .should.equal(true)
+          return done()
+        }
+      )
+    })
+
+    return it('should return error when get doc errors', function (done) {
+      this.DocManager._getDoc.callsArgWith(3, 'error')
+      return this.DocManager.getDocLines(
+        this.project_id,
+        this.doc_id,
+        (err, exist) => {
+          err.should.equal('error')
+          return done()
+        }
+      )
+    })
+  })
+
+  describe('getDoc', function () {
+    beforeEach(function () {
+      this.project = { name: 'mock-project' }
+      this.doc = {
+        _id: this.doc_id,
+        project_id: this.project_id,
+        lines: ['mock-lines'],
+      }
+      this.version = 42
+      this.MongoManager.findDoc = sinon.stub()
+      return (this.MongoManager.getDocVersion = sinon
+        .stub()
+        .yields(null, this.version))
+    })
+
+    describe('when using a filter', function () {
+      beforeEach(function () {
+        return this.MongoManager.findDoc.yields(null, this.doc)
+      })
+
+      it('should error if inS3 is not set to true', function (done) {
+        return this.DocManager._getDoc(
+          this.project_id,
+          this.doc_id,
+          { inS3: false },
+          err => {
+            expect(err).to.exist
+            return done()
+          }
+        )
+      })
+
+      it('should always get inS3 even when no filter is passed', function (done) {
+        return this.DocManager._getDoc(
+          this.project_id,
+          this.doc_id,
+          undefined,
+          err => {
+            this.MongoManager.findDoc.called.should.equal(false)
+            expect(err).to.exist
+            return done()
+          }
+        )
+      })
+
+      return it('should not error if inS3 is set to true', function (done) {
+        return this.DocManager._getDoc(
+          this.project_id,
+          this.doc_id,
+          { inS3: true },
+          err => {
+            expect(err).to.not.exist
+            return done()
+          }
+        )
+      })
+    })
+
+    describe('when the doc is in the doc collection', function () {
+      beforeEach(function () {
+        this.MongoManager.findDoc.yields(null, this.doc)
+        return this.DocManager._getDoc(
+          this.project_id,
+          this.doc_id,
+          { version: true, inS3: true },
+          this.callback
+        )
+      })
+
+      it('should get the doc from the doc collection', function () {
+        return this.MongoManager.findDoc
+          .calledWith(this.project_id, this.doc_id)
+          .should.equal(true)
+      })
+
+      it('should get the doc version from the docOps collection', function () {
+        return this.MongoManager.getDocVersion
+          .calledWith(this.doc_id)
+          .should.equal(true)
+      })
+
+      return it('should return the callback with the doc with the version', function () {
+        this.callback.called.should.equal(true)
+        const doc = this.callback.args[0][1]
+        doc.lines.should.equal(this.doc.lines)
+        return doc.version.should.equal(this.version)
+      })
+    })
+
+    describe('without the version filter', function () {
+      beforeEach(function () {
+        this.MongoManager.findDoc.yields(null, this.doc)
+        return this.DocManager._getDoc(
+          this.project_id,
+          this.doc_id,
+          { version: false, inS3: true },
+          this.callback
+        )
+      })
+
+      return it('should not get the doc version from the docOps collection', function () {
+        return this.MongoManager.getDocVersion.called.should.equal(false)
+      })
+    })
+
+    describe('when MongoManager.findDoc errors', function () {
+      beforeEach(function () {
+        this.MongoManager.findDoc.yields(this.stubbedError)
+        return this.DocManager._getDoc(
+          this.project_id,
+          this.doc_id,
+          { version: true, inS3: true },
+          this.callback
+        )
+      })
+
+      return it('should return the error', function () {
+        return this.callback.calledWith(this.stubbedError).should.equal(true)
+      })
+    })
+
+    describe('when the doc is archived', function () {
+      beforeEach(function () {
+        this.doc = {
+          _id: this.doc_id,
+          project_id: this.project_id,
+          lines: ['mock-lines'],
+          inS3: true,
+        }
+        this.MongoManager.findDoc.yields(null, this.doc)
+        this.DocArchiveManager.unarchiveDoc = (
+          project_id,
+          doc_id,
+          callback
+        ) => {
+          this.doc.inS3 = false
+          return callback()
+        }
+        sinon.spy(this.DocArchiveManager, 'unarchiveDoc')
+        return this.DocManager._getDoc(
+          this.project_id,
+          this.doc_id,
+          { version: true, inS3: true },
+          this.callback
+        )
+      })
+
+      it('should call the DocArchive to unarchive the doc', function () {
+        return this.DocArchiveManager.unarchiveDoc
+          .calledWith(this.project_id, this.doc_id)
+          .should.equal(true)
+      })
+
+      it('should look up the doc twice', function () {
+        return this.MongoManager.findDoc.calledTwice.should.equal(true)
+      })
+
+      return it('should return the doc', function () {
+        return this.callback.calledWith(null, this.doc).should.equal(true)
+      })
+    })
+
+    return describe('when the doc does not exist in the docs collection', function () {
+      beforeEach(function () {
+        this.MongoManager.findDoc = sinon.stub().yields(null, null)
+        return this.DocManager._getDoc(
+          this.project_id,
+          this.doc_id,
+          { version: true, inS3: true },
+          this.callback
+        )
+      })
+
+      return it('should return a NotFoundError', function () {
+        return this.callback
+          .calledWith(
+            sinon.match.has(
+              'message',
+              `No such doc: ${this.doc_id} in project ${this.project_id}`
+            )
+          )
+          .should.equal(true)
+      })
+    })
+  })
+
+  describe('getAllNonDeletedDocs', function () {
+    describe('when the project exists', function () {
+      beforeEach(function () {
+        this.docs = [
+          {
+            _id: this.doc_id,
+            project_id: this.project_id,
+            lines: ['mock-lines'],
+          },
+        ]
+        this.MongoManager.getProjectsDocs = sinon
+          .stub()
+          .callsArgWith(3, null, this.docs)
+        this.DocArchiveManager.unArchiveAllDocs = sinon
+          .stub()
+          .callsArgWith(1, null, this.docs)
+        this.filter = { lines: true }
+        return this.DocManager.getAllNonDeletedDocs(
+          this.project_id,
+          this.filter,
+          this.callback
+        )
+      })
+
+      it('should get the project from the database', function () {
+        return this.MongoManager.getProjectsDocs
+          .calledWith(this.project_id, { include_deleted: false }, this.filter)
+          .should.equal(true)
+      })
+
+      return it('should return the docs', function () {
+        return this.callback.calledWith(null, this.docs).should.equal(true)
+      })
+    })
+
+    return describe('when there are no docs for the project', function () {
+      beforeEach(function () {
+        this.MongoManager.getProjectsDocs = sinon
+          .stub()
+          .callsArgWith(3, null, null)
+        this.DocArchiveManager.unArchiveAllDocs = sinon
+          .stub()
+          .callsArgWith(1, null)
+        return this.DocManager.getAllNonDeletedDocs(
+          this.project_id,
+          this.filter,
+          this.callback
+        )
+      })
+
+      return it('should return a NotFoundError', function () {
+        return this.callback
+          .calledWith(
+            sinon.match.has('message', `No docs for project ${this.project_id}`)
+          )
+          .should.equal(true)
+      })
+    })
+  })
+
+  describe('patchDoc', function () {
+    describe('when the doc exists', function () {
+      beforeEach(function () {
+        this.lines = ['mock', 'doc', 'lines']
+        this.rev = 77
+        this.MongoManager.findDoc = sinon
+          .stub()
+          .yields(null, { _id: ObjectId(this.doc_id) })
+        this.MongoManager.patchDoc = sinon.stub().yields(null)
+        this.DocArchiveManager.archiveDocById = sinon.stub().yields(null)
+        this.meta = {}
+      })
+
+      describe('standard path', function () {
+        beforeEach(function (done) {
+          this.callback = sinon.stub().callsFake(done)
+          this.DocManager.patchDoc(
+            this.project_id,
+            this.doc_id,
+            this.meta,
+            this.callback
+          )
+        })
+
+        it('should get the doc', function () {
+          expect(this.MongoManager.findDoc).to.have.been.calledWith(
+            this.project_id,
+            this.doc_id
+          )
+        })
+
+        it('should persist the meta', function () {
+          expect(this.MongoManager.patchDoc).to.have.been.calledWith(
+            this.project_id,
+            this.doc_id,
+            this.meta
+          )
+        })
+
+        it('should return the callback', function () {
+          expect(this.callback).to.have.been.calledWith(null)
+        })
+      })
+
+      describe('background flush disabled and deleting a doc', function () {
+        beforeEach(function (done) {
+          this.settings.docstore.archiveOnSoftDelete = false
+          this.meta.deleted = true
+
+          this.callback = sinon.stub().callsFake(done)
+          this.DocManager.patchDoc(
+            this.project_id,
+            this.doc_id,
+            this.meta,
+            this.callback
+          )
+        })
+
+        it('should not flush the doc out of mongo', function () {
+          expect(this.DocArchiveManager.archiveDocById).to.not.have.been.called
+        })
+      })
+
+      describe('background flush enabled and not deleting a doc', function () {
+        beforeEach(function (done) {
+          this.settings.docstore.archiveOnSoftDelete = false
+          this.meta.deleted = false
+          this.callback = sinon.stub().callsFake(done)
+          this.DocManager.patchDoc(
+            this.project_id,
+            this.doc_id,
+            this.meta,
+            this.callback
+          )
+        })
+
+        it('should not flush the doc out of mongo', function () {
+          expect(this.DocArchiveManager.archiveDocById).to.not.have.been.called
+        })
+      })
+
+      describe('background flush enabled and deleting a doc', function () {
+        beforeEach(function () {
+          this.settings.docstore.archiveOnSoftDelete = true
+          this.meta.deleted = true
+        })
+
+        describe('when the background flush succeeds', function () {
+          beforeEach(function (done) {
+            this.DocArchiveManager.archiveDocById = sinon.stub().yields(null)
+            this.callback = sinon.stub().callsFake(done)
+            this.DocManager.patchDoc(
+              this.project_id,
+              this.doc_id,
+              this.meta,
+              this.callback
+            )
+          })
+
+          it('should not log a warning', function () {
+            expect(this.logger.warn).to.not.have.been.called
+          })
+
+          it('should flush the doc out of mongo', function () {
+            expect(
+              this.DocArchiveManager.archiveDocById
+            ).to.have.been.calledWith(this.project_id, this.doc_id)
+          })
+        })
+
+        describe('when the background flush fails', function () {
+          beforeEach(function (done) {
+            this.err = new Error('foo')
+            this.DocArchiveManager.archiveDocById = sinon
+              .stub()
+              .yields(this.err)
+            this.callback = sinon.stub().callsFake(done)
+            this.DocManager.patchDoc(
+              this.project_id,
+              this.doc_id,
+              this.meta,
+              this.callback
+            )
+          })
+
+          it('should log a warning', function () {
+            expect(this.logger.warn).to.have.been.calledWith(
+              sinon.match({
+                project_id: this.project_id,
+                doc_id: this.doc_id,
+                err: this.err,
+              }),
+              'archiving a single doc in the background failed'
+            )
+          })
+
+          it('should not fail the delete process', function () {
+            expect(this.callback).to.have.been.calledWith(null)
+          })
+        })
+      })
+    })
+
+    describe('when the doc does not exist', function () {
+      beforeEach(function () {
+        this.MongoManager.findDoc = sinon.stub().yields(null)
+        this.DocManager.patchDoc(
+          this.project_id,
+          this.doc_id,
+          {},
+          this.callback
+        )
+      })
+
+      it('should return a NotFoundError', function () {
+        expect(this.callback).to.have.been.calledWith(
+          sinon.match.has(
+            'message',
+            `No such project/doc to delete: ${this.project_id}/${this.doc_id}`
+          )
+        )
+      })
+    })
+  })
+
+  return describe('updateDoc', function () {
+    beforeEach(function () {
+      this.oldDocLines = ['old', 'doc', 'lines']
+      this.newDocLines = ['new', 'doc', 'lines']
+      this.originalRanges = {
+        changes: [
+          {
+            id: ObjectId().toString(),
+            op: { i: 'foo', p: 3 },
+            meta: {
+              user_id: ObjectId().toString(),
+              ts: new Date().toString(),
+            },
+          },
+        ],
+      }
+      this.newRanges = {
+        changes: [
+          {
+            id: ObjectId().toString(),
+            op: { i: 'bar', p: 6 },
+            meta: {
+              user_id: ObjectId().toString(),
+              ts: new Date().toString(),
+            },
+          },
+        ],
+      }
+      this.version = 42
+      this.doc = {
+        _id: this.doc_id,
+        project_id: this.project_id,
+        lines: this.oldDocLines,
+        rev: (this.rev = 5),
+        version: this.version,
+        ranges: this.originalRanges,
+      }
+
+      this.MongoManager.upsertIntoDocCollection = sinon.stub().callsArg(3)
+      this.MongoManager.setDocVersion = sinon.stub().yields()
+      return (this.DocManager._getDoc = sinon.stub())
+    })
+
+    describe('when only the doc lines have changed', function () {
+      beforeEach(function () {
+        this.DocManager._getDoc = sinon.stub().callsArgWith(3, null, this.doc)
+        return this.DocManager.updateDoc(
+          this.project_id,
+          this.doc_id,
+          this.newDocLines,
+          this.version,
+          this.originalRanges,
+          this.callback
+        )
+      })
+
+      it('should get the existing doc', function () {
+        return this.DocManager._getDoc
+          .calledWith(this.project_id, this.doc_id, {
+            version: true,
+            rev: true,
+            lines: true,
+            version: true,
+            ranges: true,
+            inS3: true,
+          })
+          .should.equal(true)
+      })
+
+      it('should upsert the document to the doc collection', function () {
+        return this.MongoManager.upsertIntoDocCollection
+          .calledWith(this.project_id, this.doc_id, { lines: this.newDocLines })
+          .should.equal(true)
+      })
+
+      it('should not update the version', function () {
+        return this.MongoManager.setDocVersion.called.should.equal(false)
+      })
+
+      return it('should return the callback with the new rev', function () {
+        return this.callback
+          .calledWith(null, true, this.rev + 1)
+          .should.equal(true)
+      })
+    })
+
+    describe('when the doc ranges have changed', function () {
+      beforeEach(function () {
+        this.DocManager._getDoc = sinon.stub().callsArgWith(3, null, this.doc)
+        this.RangeManager.shouldUpdateRanges.returns(true)
+        return this.DocManager.updateDoc(
+          this.project_id,
+          this.doc_id,
+          this.oldDocLines,
+          this.version,
+          this.newRanges,
+          this.callback
+        )
+      })
+
+      it('should upsert the ranges', function () {
+        return this.MongoManager.upsertIntoDocCollection
+          .calledWith(this.project_id, this.doc_id, { ranges: this.newRanges })
+          .should.equal(true)
+      })
+
+      it('should not update the version', function () {
+        return this.MongoManager.setDocVersion.called.should.equal(false)
+      })
+
+      return it('should return the callback with the new rev', function () {
+        return this.callback
+          .calledWith(null, true, this.rev + 1)
+          .should.equal(true)
+      })
+    })
+
+    describe('when only the version has changed', function () {
+      beforeEach(function () {
+        this.DocManager._getDoc = sinon.stub().callsArgWith(3, null, this.doc)
+        return this.DocManager.updateDoc(
+          this.project_id,
+          this.doc_id,
+          this.oldDocLines,
+          this.version + 1,
+          this.originalRanges,
+          this.callback
+        )
+      })
+
+      it('should not change the lines or ranges', function () {
+        return this.MongoManager.upsertIntoDocCollection.called.should.equal(
+          false
+        )
+      })
+
+      it('should update the version', function () {
+        return this.MongoManager.setDocVersion
+          .calledWith(this.doc_id, this.version + 1)
+          .should.equal(true)
+      })
+
+      return it('should return the callback with the old rev', function () {
+        return this.callback.calledWith(null, true, this.rev).should.equal(true)
+      })
+    })
+
+    describe('when the doc has not changed at all', function () {
+      beforeEach(function () {
+        this.DocManager._getDoc = sinon.stub().callsArgWith(3, null, this.doc)
+        return this.DocManager.updateDoc(
+          this.project_id,
+          this.doc_id,
+          this.oldDocLines,
+          this.version,
+          this.originalRanges,
+          this.callback
+        )
+      })
+
+      it('should not update the ranges or lines', function () {
+        return this.MongoManager.upsertIntoDocCollection.called.should.equal(
+          false
+        )
+      })
+
+      it('should not update the version', function () {
+        return this.MongoManager.setDocVersion.called.should.equal(false)
+      })
+
+      return it('should return the callback with the old rev and modified == false', function () {
+        return this.callback
+          .calledWith(null, false, this.rev)
+          .should.equal(true)
+      })
+    })
+
+    describe('when the version is null', function () {
+      beforeEach(function () {
+        return this.DocManager.updateDoc(
+          this.project_id,
+          this.doc_id,
+          this.newDocLines,
+          null,
+          this.originalRanges,
+          this.callback
+        )
+      })
+
+      return it('should return an error', function () {
+        return this.callback
+          .calledWith(
+            sinon.match.has('message', 'no lines, version or ranges provided')
+          )
+          .should.equal(true)
+      })
+    })
+
+    describe('when the lines are null', function () {
+      beforeEach(function () {
+        return this.DocManager.updateDoc(
+          this.project_id,
+          this.doc_id,
+          null,
+          this.version,
+          this.originalRanges,
+          this.callback
+        )
+      })
+
+      return it('should return an error', function () {
+        return this.callback
+          .calledWith(
+            sinon.match.has('message', 'no lines, version or ranges provided')
+          )
+          .should.equal(true)
+      })
+    })
+
+    describe('when the ranges are null', function () {
+      beforeEach(function () {
+        return this.DocManager.updateDoc(
+          this.project_id,
+          this.doc_id,
+          this.newDocLines,
+          this.version,
+          null,
+          this.callback
+        )
+      })
+
+      return it('should return an error', function () {
+        return this.callback
+          .calledWith(
+            sinon.match.has('message', 'no lines, version or ranges provided')
+          )
+          .should.equal(true)
+      })
+    })
+
+    describe('when there is a generic error getting the doc', function () {
+      beforeEach(function () {
+        this.error = new Error('doc could not be found')
+        this.DocManager._getDoc = sinon
+          .stub()
+          .callsArgWith(3, this.error, null, null)
+        return this.DocManager.updateDoc(
+          this.project_id,
+          this.doc_id,
+          this.newDocLines,
+          this.version,
+          this.originalRanges,
+          this.callback
+        )
+      })
+
+      it('should not upsert the document to the doc collection', function () {
+        return this.MongoManager.upsertIntoDocCollection.called.should.equal(
+          false
+        )
+      })
+
+      return it('should return the callback with the error', function () {
+        return this.callback.calledWith(this.error).should.equal(true)
+      })
+    })
+
+    describe('when the doc lines have not changed', function () {
+      beforeEach(function () {
+        this.DocManager._getDoc = sinon.stub().callsArgWith(3, null, this.doc)
+        return this.DocManager.updateDoc(
+          this.project_id,
+          this.doc_id,
+          this.oldDocLines.slice(),
+          this.version,
+          this.originalRanges,
+          this.callback
+        )
+      })
+
+      it('should not update the doc', function () {
+        return this.MongoManager.upsertIntoDocCollection.called.should.equal(
+          false
+        )
+      })
+
+      return it('should return the callback with the existing rev', function () {
+        return this.callback
+          .calledWith(null, false, this.rev)
+          .should.equal(true)
+      })
+    })
+
+    return describe('when the doc does not exist', function () {
+      beforeEach(function () {
+        this.DocManager._getDoc = sinon.stub().callsArgWith(3, null, null, null)
+        return this.DocManager.updateDoc(
+          this.project_id,
+          this.doc_id,
+          this.newDocLines,
+          this.version,
+          this.originalRanges,
+          this.callback
+        )
+      })
+
+      it('should upsert the document to the doc collection', function () {
+        return this.MongoManager.upsertIntoDocCollection
+          .calledWith(this.project_id, this.doc_id, {
+            lines: this.newDocLines,
+            ranges: this.originalRanges,
+          })
+          .should.equal(true)
+      })
+
+      it('should set the version', function () {
+        return this.MongoManager.setDocVersion
+          .calledWith(this.doc_id, this.version)
+          .should.equal(true)
+      })
+
+      return it('should return the callback with the new rev', function () {
+        return this.callback.calledWith(null, true, 1).should.equal(true)
+      })
+    })
+  })
+})

services/docstore/test/unit/js/HttpControllerTests.js

@@ -0,0 +1,513 @@
+/* eslint-disable
+    no-return-assign,
+    no-unused-vars,
+*/
+// TODO: This file was created by bulk-decaffeinate.
+// Fix any style issues and re-enable lint.
+/*
+ * decaffeinate suggestions:
+ * DS102: Remove unnecessary code created because of implicit returns
+ * Full docs: https://github.com/decaffeinate/decaffeinate/blob/master/docs/suggestions.md
+ */
+const SandboxedModule = require('sandboxed-module')
+const sinon = require('sinon')
+const { assert, expect } = require('chai')
+const modulePath = require('path').join(
+  __dirname,
+  '../../../app/js/HttpController'
+)
+const { ObjectId } = require('mongodb')
+
+describe('HttpController', function () {
+  beforeEach(function () {
+    const settings = {
+      max_doc_length: 2 * 1024 * 1024,
+    }
+    this.HttpController = SandboxedModule.require(modulePath, {
+      requires: {
+        './DocManager': (this.DocManager = {}),
+        './DocArchiveManager': (this.DocArchiveManager = {}),
+        '@overleaf/settings': settings,
+        './HealthChecker': {},
+      },
+    })
+    this.res = {
+      send: sinon.stub(),
+      sendStatus: sinon.stub(),
+      json: sinon.stub(),
+      setHeader: sinon.stub(),
+    }
+    this.res.status = sinon.stub().returns(this.res)
+    this.req = { query: {} }
+    this.next = sinon.stub()
+    this.project_id = 'mock-project-id'
+    this.doc_id = 'mock-doc-id'
+    this.doc = {
+      _id: this.doc_id,
+      lines: ['mock', 'lines', ' here', '', '', ' spaces '],
+      version: 42,
+      rev: 5,
+    }
+    return (this.deletedDoc = {
+      deleted: true,
+      _id: this.doc_id,
+      lines: ['mock', 'lines', ' here', '', '', ' spaces '],
+      version: 42,
+      rev: 5,
+    })
+  })
+
+  describe('getDoc', function () {
+    describe('without deleted docs', function () {
+      beforeEach(function () {
+        this.req.params = {
+          project_id: this.project_id,
+          doc_id: this.doc_id,
+        }
+        this.DocManager.getFullDoc = sinon
+          .stub()
+          .callsArgWith(2, null, this.doc)
+        return this.HttpController.getDoc(this.req, this.res, this.next)
+      })
+
+      it('should get the document with the version (including deleted)', function () {
+        return this.DocManager.getFullDoc
+          .calledWith(this.project_id, this.doc_id)
+          .should.equal(true)
+      })
+
+      return it('should return the doc as JSON', function () {
+        return this.res.json
+          .calledWith({
+            _id: this.doc_id,
+            lines: this.doc.lines,
+            rev: this.doc.rev,
+            version: this.doc.version,
+          })
+          .should.equal(true)
+      })
+    })
+
+    return describe('which is deleted', function () {
+      beforeEach(function () {
+        this.req.params = {
+          project_id: this.project_id,
+          doc_id: this.doc_id,
+        }
+        return (this.DocManager.getFullDoc = sinon
+          .stub()
+          .callsArgWith(2, null, this.deletedDoc))
+      })
+
+      it('should get the doc from the doc manager', function () {
+        this.HttpController.getDoc(this.req, this.res, this.next)
+        return this.DocManager.getFullDoc
+          .calledWith(this.project_id, this.doc_id)
+          .should.equal(true)
+      })
+
+      it('should return 404 if the query string delete is not set ', function () {
+        this.HttpController.getDoc(this.req, this.res, this.next)
+        return this.res.sendStatus.calledWith(404).should.equal(true)
+      })
+
+      return it('should return the doc as JSON if include_deleted is set to true', function () {
+        this.req.query.include_deleted = 'true'
+        this.HttpController.getDoc(this.req, this.res, this.next)
+        return this.res.json
+          .calledWith({
+            _id: this.doc_id,
+            lines: this.doc.lines,
+            rev: this.doc.rev,
+            deleted: true,
+            version: this.doc.version,
+          })
+          .should.equal(true)
+      })
+    })
+  })
+
+  describe('getRawDoc', function () {
+    beforeEach(function () {
+      this.req.params = {
+        project_id: this.project_id,
+        doc_id: this.doc_id,
+      }
+      this.DocManager.getDocLines = sinon.stub().callsArgWith(2, null, this.doc)
+      return this.HttpController.getRawDoc(this.req, this.res, this.next)
+    })
+
+    it('should get the document without the version', function () {
+      return this.DocManager.getDocLines
+        .calledWith(this.project_id, this.doc_id)
+        .should.equal(true)
+    })
+
+    it('should set the content type header', function () {
+      return this.res.setHeader
+        .calledWith('content-type', 'text/plain')
+        .should.equal(true)
+    })
+
+    return it('should send the raw version of the doc', function () {
+      return assert.deepEqual(
+        this.res.send.args[0][0],
+        `${this.doc.lines[0]}\n${this.doc.lines[1]}\n${this.doc.lines[2]}\n${this.doc.lines[3]}\n${this.doc.lines[4]}\n${this.doc.lines[5]}`
+      )
+    })
+  })
+
+  describe('getAllDocs', function () {
+    describe('normally', function () {
+      beforeEach(function () {
+        this.req.params = { project_id: this.project_id }
+        this.docs = [
+          {
+            _id: ObjectId(),
+            lines: ['mock', 'lines', 'one'],
+            rev: 2,
+          },
+          {
+            _id: ObjectId(),
+            lines: ['mock', 'lines', 'two'],
+            rev: 4,
+          },
+        ]
+        this.DocManager.getAllNonDeletedDocs = sinon
+          .stub()
+          .callsArgWith(2, null, this.docs)
+        return this.HttpController.getAllDocs(this.req, this.res, this.next)
+      })
+
+      it('should get all the (non-deleted) docs', function () {
+        return this.DocManager.getAllNonDeletedDocs
+          .calledWith(this.project_id, { lines: true, rev: true })
+          .should.equal(true)
+      })
+
+      return it('should return the doc as JSON', function () {
+        return this.res.json
+          .calledWith([
+            {
+              _id: this.docs[0]._id.toString(),
+              lines: this.docs[0].lines,
+              rev: this.docs[0].rev,
+            },
+            {
+              _id: this.docs[1]._id.toString(),
+              lines: this.docs[1].lines,
+              rev: this.docs[1].rev,
+            },
+          ])
+          .should.equal(true)
+      })
+    })
+
+    return describe('with a null doc', function () {
+      beforeEach(function () {
+        this.req.params = { project_id: this.project_id }
+        this.docs = [
+          {
+            _id: ObjectId(),
+            lines: ['mock', 'lines', 'one'],
+            rev: 2,
+          },
+          null,
+          {
+            _id: ObjectId(),
+            lines: ['mock', 'lines', 'two'],
+            rev: 4,
+          },
+        ]
+        this.DocManager.getAllNonDeletedDocs = sinon
+          .stub()
+          .callsArgWith(2, null, this.docs)
+        return this.HttpController.getAllDocs(this.req, this.res, this.next)
+      })
+
+      it('should return the non null docs as JSON', function () {
+        return this.res.json
+          .calledWith([
+            {
+              _id: this.docs[0]._id.toString(),
+              lines: this.docs[0].lines,
+              rev: this.docs[0].rev,
+            },
+            {
+              _id: this.docs[2]._id.toString(),
+              lines: this.docs[2].lines,
+              rev: this.docs[2].rev,
+            },
+          ])
+          .should.equal(true)
+      })
+
+      return it('should log out an error', function () {
+        return this.logger.error
+          .calledWith(
+            {
+              err: sinon.match.has('message', 'null doc'),
+              project_id: this.project_id,
+            },
+            'encountered null doc'
+          )
+          .should.equal(true)
+      })
+    })
+  })
+
+  describe('getAllRanges', function () {
+    return describe('normally', function () {
+      beforeEach(function () {
+        this.req.params = { project_id: this.project_id }
+        this.docs = [
+          {
+            _id: ObjectId(),
+            ranges: { mock_ranges: 'one' },
+          },
+          {
+            _id: ObjectId(),
+            ranges: { mock_ranges: 'two' },
+          },
+        ]
+        this.DocManager.getAllNonDeletedDocs = sinon
+          .stub()
+          .callsArgWith(2, null, this.docs)
+        return this.HttpController.getAllRanges(this.req, this.res, this.next)
+      })
+
+      it('should get all the (non-deleted) doc ranges', function () {
+        return this.DocManager.getAllNonDeletedDocs
+          .calledWith(this.project_id, { ranges: true })
+          .should.equal(true)
+      })
+
+      return it('should return the doc as JSON', function () {
+        return this.res.json
+          .calledWith([
+            {
+              _id: this.docs[0]._id.toString(),
+              ranges: this.docs[0].ranges,
+            },
+            {
+              _id: this.docs[1]._id.toString(),
+              ranges: this.docs[1].ranges,
+            },
+          ])
+          .should.equal(true)
+      })
+    })
+  })
+
+  describe('updateDoc', function () {
+    beforeEach(function () {
+      return (this.req.params = {
+        project_id: this.project_id,
+        doc_id: this.doc_id,
+      })
+    })
+
+    describe('when the doc lines exist and were updated', function () {
+      beforeEach(function () {
+        this.req.body = {
+          lines: (this.lines = ['hello', 'world']),
+          version: (this.version = 42),
+          ranges: (this.ranges = { changes: 'mock' }),
+        }
+        this.DocManager.updateDoc = sinon
+          .stub()
+          .yields(null, true, (this.rev = 5))
+        return this.HttpController.updateDoc(this.req, this.res, this.next)
+      })
+
+      it('should update the document', function () {
+        return this.DocManager.updateDoc
+          .calledWith(
+            this.project_id,
+            this.doc_id,
+            this.lines,
+            this.version,
+            this.ranges
+          )
+          .should.equal(true)
+      })
+
+      return it('should return a modified status', function () {
+        return this.res.json
+          .calledWith({ modified: true, rev: this.rev })
+          .should.equal(true)
+      })
+    })
+
+    describe('when the doc lines exist and were not updated', function () {
+      beforeEach(function () {
+        this.req.body = {
+          lines: (this.lines = ['hello', 'world']),
+          version: (this.version = 42),
+          ranges: {},
+        }
+        this.DocManager.updateDoc = sinon
+          .stub()
+          .yields(null, false, (this.rev = 5))
+        return this.HttpController.updateDoc(this.req, this.res, this.next)
+      })
+
+      return it('should return a modified status', function () {
+        return this.res.json
+          .calledWith({ modified: false, rev: this.rev })
+          .should.equal(true)
+      })
+    })
+
+    describe('when the doc lines are not provided', function () {
+      beforeEach(function () {
+        this.req.body = { version: 42, ranges: {} }
+        this.DocManager.updateDoc = sinon.stub().yields(null, false)
+        return this.HttpController.updateDoc(this.req, this.res, this.next)
+      })
+
+      it('should not update the document', function () {
+        return this.DocManager.updateDoc.called.should.equal(false)
+      })
+
+      return it('should return a 400 (bad request) response', function () {
+        return this.res.sendStatus.calledWith(400).should.equal(true)
+      })
+    })
+
+    describe('when the doc version are not provided', function () {
+      beforeEach(function () {
+        this.req.body = { version: 42, lines: ['hello world'] }
+        this.DocManager.updateDoc = sinon.stub().yields(null, false)
+        return this.HttpController.updateDoc(this.req, this.res, this.next)
+      })
+
+      it('should not update the document', function () {
+        return this.DocManager.updateDoc.called.should.equal(false)
+      })
+
+      return it('should return a 400 (bad request) response', function () {
+        return this.res.sendStatus.calledWith(400).should.equal(true)
+      })
+    })
+
+    describe('when the doc ranges is not provided', function () {
+      beforeEach(function () {
+        this.req.body = { lines: ['foo'], version: 42 }
+        this.DocManager.updateDoc = sinon.stub().yields(null, false)
+        return this.HttpController.updateDoc(this.req, this.res, this.next)
+      })
+
+      it('should not update the document', function () {
+        return this.DocManager.updateDoc.called.should.equal(false)
+      })
+
+      return it('should return a 400 (bad request) response', function () {
+        return this.res.sendStatus.calledWith(400).should.equal(true)
+      })
+    })
+
+    return describe('when the doc body is too large', function () {
+      beforeEach(function () {
+        this.req.body = {
+          lines: (this.lines = Array(2049).fill('a'.repeat(1024))),
+          version: (this.version = 42),
+          ranges: (this.ranges = { changes: 'mock' }),
+        }
+        return this.HttpController.updateDoc(this.req, this.res, this.next)
+      })
+
+      it('should return a 413 (too large) response', function () {
+        return sinon.assert.calledWith(this.res.status, 413)
+      })
+
+      return it('should report that the document body is too large', function () {
+        return sinon.assert.calledWith(this.res.send, 'document body too large')
+      })
+    })
+  })
+
+  describe('patchDoc', function () {
+    beforeEach(function () {
+      this.req.params = {
+        project_id: this.project_id,
+        doc_id: this.doc_id,
+      }
+      this.req.body = { name: 'foo.tex' }
+      this.DocManager.patchDoc = sinon.stub().yields(null)
+      this.HttpController.patchDoc(this.req, this.res, this.next)
+    })
+
+    it('should delete the document', function () {
+      expect(this.DocManager.patchDoc).to.have.been.calledWith(
+        this.project_id,
+        this.doc_id
+      )
+    })
+
+    it('should return a 204 (No Content)', function () {
+      expect(this.res.sendStatus).to.have.been.calledWith(204)
+    })
+
+    describe('with an invalid payload', function () {
+      beforeEach(function () {
+        this.req.body = { cannot: 'happen' }
+
+        this.DocManager.patchDoc = sinon.stub().yields(null)
+        this.HttpController.patchDoc(this.req, this.res, this.next)
+      })
+
+      it('should log a message', function () {
+        expect(this.logger.fatal).to.have.been.calledWith(
+          { field: 'cannot' },
+          'joi validation for pathDoc is broken'
+        )
+      })
+
+      it('should not pass the invalid field along', function () {
+        expect(this.DocManager.patchDoc).to.have.been.calledWith(
+          this.project_id,
+          this.doc_id,
+          {}
+        )
+      })
+    })
+  })
+
+  describe('archiveAllDocs', function () {
+    beforeEach(function () {
+      this.req.params = { project_id: this.project_id }
+      this.DocArchiveManager.archiveAllDocs = sinon.stub().callsArg(1)
+      return this.HttpController.archiveAllDocs(this.req, this.res, this.next)
+    })
+
+    it('should archive the project', function () {
+      return this.DocArchiveManager.archiveAllDocs
+        .calledWith(this.project_id)
+        .should.equal(true)
+    })
+
+    return it('should return a 204 (No Content)', function () {
+      return this.res.sendStatus.calledWith(204).should.equal(true)
+    })
+  })
+
+  return describe('destroyAllDocs', function () {
+    beforeEach(function () {
+      this.req.params = { project_id: this.project_id }
+      this.DocArchiveManager.destroyAllDocs = sinon.stub().callsArg(1)
+      return this.HttpController.destroyAllDocs(this.req, this.res, this.next)
+    })
+
+    it('should destroy the docs', function () {
+      return sinon.assert.calledWith(
+        this.DocArchiveManager.destroyAllDocs,
+        this.project_id
+      )
+    })
+
+    return it('should return 204', function () {
+      return sinon.assert.calledWith(this.res.sendStatus, 204)
+    })
+  })
+})

services/docstore/test/unit/js/MongoManagerTests.js

@@ -0,0 +1,375 @@
+/* eslint-disable
+    handle-callback-err,
+    no-return-assign,
+*/
+// TODO: This file was created by bulk-decaffeinate.
+// Fix any style issues and re-enable lint.
+/*
+ * decaffeinate suggestions:
+ * DS102: Remove unnecessary code created because of implicit returns
+ * Full docs: https://github.com/decaffeinate/decaffeinate/blob/master/docs/suggestions.md
+ */
+const SandboxedModule = require('sandboxed-module')
+const sinon = require('sinon')
+const modulePath = require('path').join(
+  __dirname,
+  '../../../app/js/MongoManager'
+)
+const { ObjectId } = require('mongodb')
+const { assert } = require('chai')
+const Errors = require('../../../app/js/Errors')
+
+describe('MongoManager', function () {
+  beforeEach(function () {
+    this.MongoManager = SandboxedModule.require(modulePath, {
+      requires: {
+        './mongodb': {
+          db: (this.db = { docs: {}, docOps: {} }),
+          ObjectId,
+        },
+        '@overleaf/metrics': { timeAsyncMethod: sinon.stub() },
+        '@overleaf/settings': { max_deleted_docs: 42 },
+        './Errors': Errors,
+      },
+    })
+    this.project_id = ObjectId().toString()
+    this.doc_id = ObjectId().toString()
+    this.callback = sinon.stub()
+    return (this.stubbedErr = new Error('hello world'))
+  })
+
+  describe('findDoc', function () {
+    beforeEach(function () {
+      this.doc = { name: 'mock-doc' }
+      this.db.docs.findOne = sinon.stub().callsArgWith(2, null, this.doc)
+      this.filter = { lines: true }
+      return this.MongoManager.findDoc(
+        this.project_id,
+        this.doc_id,
+        this.filter,
+        this.callback
+      )
+    })
+
+    it('should find the doc', function () {
+      this.db.docs.findOne
+        .calledWith(
+          {
+            _id: ObjectId(this.doc_id),
+            project_id: ObjectId(this.project_id),
+          },
+          {
+            projection: this.filter,
+          }
+        )
+        .should.equal(true)
+    })
+
+    return it('should call the callback with the doc', function () {
+      return this.callback.calledWith(null, this.doc).should.equal(true)
+    })
+  })
+
+  describe('patchDoc', function () {
+    beforeEach(function (done) {
+      this.db.docs.updateOne = sinon.stub().yields(null)
+      this.meta = { name: 'foo.tex' }
+      this.callback.callsFake(done)
+      this.MongoManager.patchDoc(
+        this.project_id,
+        this.doc_id,
+        this.meta,
+        this.callback
+      )
+    })
+
+    it('should pass the parameter along', function () {
+      this.db.docs.updateOne.should.have.been.calledWith(
+        {
+          _id: ObjectId(this.doc_id),
+          project_id: ObjectId(this.project_id),
+        },
+        {
+          $set: this.meta,
+        },
+        this.callback
+      )
+    })
+  })
+
+  describe('getProjectsDocs', function () {
+    beforeEach(function () {
+      this.filter = { lines: true }
+      this.doc1 = { name: 'mock-doc1' }
+      this.doc2 = { name: 'mock-doc2' }
+      this.doc3 = { name: 'mock-doc3' }
+      this.doc4 = { name: 'mock-doc4' }
+      this.db.docs.find = sinon.stub().returns({
+        toArray: sinon
+          .stub()
+          .callsArgWith(0, null, [this.doc, this.doc3, this.doc4]),
+      })
+    })
+
+    describe('with included_deleted = false', function () {
+      beforeEach(function () {
+        return this.MongoManager.getProjectsDocs(
+          this.project_id,
+          { include_deleted: false },
+          this.filter,
+          this.callback
+        )
+      })
+
+      it('should find the non-deleted docs via the project_id', function () {
+        return this.db.docs.find
+          .calledWith(
+            {
+              project_id: ObjectId(this.project_id),
+              deleted: { $ne: true },
+            },
+            {
+              projection: this.filter,
+            }
+          )
+          .should.equal(true)
+      })
+
+      return it('should call the callback with the docs', function () {
+        return this.callback
+          .calledWith(null, [this.doc, this.doc3, this.doc4])
+          .should.equal(true)
+      })
+    })
+
+    return describe('with included_deleted = true', function () {
+      beforeEach(function () {
+        return this.MongoManager.getProjectsDocs(
+          this.project_id,
+          { include_deleted: true },
+          this.filter,
+          this.callback
+        )
+      })
+
+      it('should find all via the project_id', function () {
+        return this.db.docs.find
+          .calledWith(
+            {
+              project_id: ObjectId(this.project_id),
+            },
+            {
+              projection: this.filter,
+            }
+          )
+          .should.equal(true)
+      })
+
+      return it('should call the callback with the docs', function () {
+        return this.callback
+          .calledWith(null, [this.doc, this.doc3, this.doc4])
+          .should.equal(true)
+      })
+    })
+  })
+
+  describe('getProjectsDeletedDocs', function () {
+    beforeEach(function (done) {
+      this.filter = { name: true }
+      this.doc1 = { _id: '1', name: 'mock-doc1.tex' }
+      this.doc2 = { _id: '2', name: 'mock-doc2.tex' }
+      this.doc3 = { _id: '3', name: 'mock-doc3.tex' }
+      this.db.docs.find = sinon.stub().returns({
+        toArray: sinon.stub().yields(null, [this.doc1, this.doc2, this.doc3]),
+      })
+      this.callback.callsFake(done)
+      this.MongoManager.getProjectsDeletedDocs(
+        this.project_id,
+        this.filter,
+        this.callback
+      )
+    })
+
+    it('should find the deleted docs via the project_id', function () {
+      this.db.docs.find
+        .calledWith({
+          project_id: ObjectId(this.project_id),
+          deleted: true,
+        })
+        .should.equal(true)
+    })
+
+    it('should filter, sort by deletedAt and limit', function () {
+      this.db.docs.find
+        .calledWith(sinon.match.any, {
+          projection: this.filter,
+          sort: { deletedAt: -1 },
+          limit: 42,
+        })
+        .should.equal(true)
+    })
+
+    it('should call the callback with the docs', function () {
+      this.callback
+        .calledWith(null, [this.doc1, this.doc2, this.doc3])
+        .should.equal(true)
+    })
+  })
+
+  describe('upsertIntoDocCollection', function () {
+    beforeEach(function () {
+      this.db.docs.updateOne = sinon.stub().callsArgWith(3, this.stubbedErr)
+      return (this.oldRev = 77)
+    })
+
+    it('should upsert the document', function (done) {
+      return this.MongoManager.upsertIntoDocCollection(
+        this.project_id,
+        this.doc_id,
+        { lines: this.lines },
+        err => {
+          const args = this.db.docs.updateOne.args[0]
+          assert.deepEqual(args[0], { _id: ObjectId(this.doc_id) })
+          assert.equal(args[1].$set.lines, this.lines)
+          assert.equal(args[1].$inc.rev, 1)
+          assert.deepEqual(args[1].$set.project_id, ObjectId(this.project_id))
+          return done()
+        }
+      )
+    })
+
+    return it('should return the error', function (done) {
+      return this.MongoManager.upsertIntoDocCollection(
+        this.project_id,
+        this.doc_id,
+        { lines: this.lines },
+        err => {
+          err.should.equal(this.stubbedErr)
+          return done()
+        }
+      )
+    })
+  })
+
+  describe('destroyDoc', function () {
+    beforeEach(function (done) {
+      this.db.docs.deleteOne = sinon.stub().yields()
+      this.db.docOps.deleteOne = sinon.stub().yields()
+      return this.MongoManager.destroyDoc('123456789012', done)
+    })
+
+    it('should destroy the doc', function () {
+      return sinon.assert.calledWith(this.db.docs.deleteOne, {
+        _id: ObjectId('123456789012'),
+      })
+    })
+
+    return it('should destroy the docOps', function () {
+      return sinon.assert.calledWith(this.db.docOps.deleteOne, {
+        doc_id: ObjectId('123456789012'),
+      })
+    })
+  })
+
+  describe('getDocVersion', function () {
+    describe('when the doc exists', function () {
+      beforeEach(function () {
+        this.doc = { version: (this.version = 42) }
+        this.db.docOps.findOne = sinon.stub().callsArgWith(2, null, this.doc)
+        return this.MongoManager.getDocVersion(this.doc_id, this.callback)
+      })
+
+      it('should look for the doc in the database', function () {
+        return this.db.docOps.findOne
+          .calledWith(
+            { doc_id: ObjectId(this.doc_id) },
+            {
+              projection: { version: 1 },
+            }
+          )
+          .should.equal(true)
+      })
+
+      return it('should call the callback with the version', function () {
+        return this.callback.calledWith(null, this.version).should.equal(true)
+      })
+    })
+
+    return describe("when the doc doesn't exist", function () {
+      beforeEach(function () {
+        this.db.docOps.findOne = sinon.stub().callsArgWith(2, null, null)
+        return this.MongoManager.getDocVersion(this.doc_id, this.callback)
+      })
+
+      return it('should call the callback with 0', function () {
+        return this.callback.calledWith(null, 0).should.equal(true)
+      })
+    })
+  })
+
+  describe('setDocVersion', function () {
+    beforeEach(function () {
+      this.version = 42
+      this.db.docOps.updateOne = sinon.stub().callsArg(3)
+      return this.MongoManager.setDocVersion(
+        this.doc_id,
+        this.version,
+        this.callback
+      )
+    })
+
+    it('should update the doc version', function () {
+      return this.db.docOps.updateOne
+        .calledWith(
+          {
+            doc_id: ObjectId(this.doc_id),
+          },
+          {
+            $set: {
+              version: this.version,
+            },
+          },
+          {
+            upsert: true,
+          }
+        )
+        .should.equal(true)
+    })
+
+    return it('should call the callback', function () {
+      return this.callback.called.should.equal(true)
+    })
+  })
+
+  describe('withRevCheck', function () {
+    this.beforeEach(function () {
+      this.doc = { _id: ObjectId(), name: 'mock-doc', rev: 1 }
+      this.testFunction = sinon.stub().yields(null, 'foo')
+    })
+
+    it('should call the callback when the rev has not changed', function (done) {
+      this.db.docs.findOne = sinon.stub().callsArgWith(2, null, { rev: 1 })
+      this.MongoManager.withRevCheck(
+        this.doc,
+        this.testFunction,
+        (err, result) => {
+          result.should.equal('foo')
+          assert.isNull(err)
+          done()
+        }
+      )
+    })
+
+    it('should return an error when the rev has changed', function (done) {
+      this.db.docs.findOne = sinon.stub().callsArgWith(2, null, { rev: 2 })
+      this.MongoManager.withRevCheck(
+        this.doc,
+        this.testFunction,
+        (err, result) => {
+          err.should.be.instanceof(Errors.DocModifiedError)
+          done()
+        }
+      )
+    })
+  })
+})

services/docstore/test/unit/js/RangeManagerTests.js

@@ -0,0 +1,255 @@
+/* eslint-disable
+    camelcase,
+    no-return-assign,
+    no-unused-vars,
+*/
+// TODO: This file was created by bulk-decaffeinate.
+// Fix any style issues and re-enable lint.
+/*
+ * decaffeinate suggestions:
+ * DS102: Remove unnecessary code created because of implicit returns
+ * Full docs: https://github.com/decaffeinate/decaffeinate/blob/master/docs/suggestions.md
+ */
+const SandboxedModule = require('sandboxed-module')
+const sinon = require('sinon')
+const { assert, expect } = require('chai')
+const modulePath = require('path').join(
+  __dirname,
+  '../../../app/js/RangeManager'
+)
+const { ObjectId } = require('mongodb')
+const _ = require('underscore')
+
+describe('RangeManager', function () {
+  beforeEach(function () {
+    return (this.RangeManager = SandboxedModule.require(modulePath, {
+      requires: {
+        './mongodb': {
+          ObjectId,
+        },
+      },
+    }))
+  })
+
+  describe('jsonRangesToMongo', function () {
+    it('should convert ObjectIds and dates to proper objects', function () {
+      const change_id = ObjectId().toString()
+      const comment_id = ObjectId().toString()
+      const user_id = ObjectId().toString()
+      const thread_id = ObjectId().toString()
+      const ts = new Date().toJSON()
+      return this.RangeManager.jsonRangesToMongo({
+        changes: [
+          {
+            id: change_id,
+            op: { i: 'foo', p: 3 },
+            metadata: {
+              user_id,
+              ts,
+            },
+          },
+        ],
+        comments: [
+          {
+            id: comment_id,
+            op: { c: 'foo', p: 3, t: thread_id },
+          },
+        ],
+      }).should.deep.equal({
+        changes: [
+          {
+            id: ObjectId(change_id),
+            op: { i: 'foo', p: 3 },
+            metadata: {
+              user_id: ObjectId(user_id),
+              ts: new Date(ts),
+            },
+          },
+        ],
+        comments: [
+          {
+            id: ObjectId(comment_id),
+            op: { c: 'foo', p: 3, t: ObjectId(thread_id) },
+          },
+        ],
+      })
+    })
+
+    it('should leave malformed ObjectIds as they are', function () {
+      const change_id = 'foo'
+      const comment_id = 'bar'
+      const user_id = 'baz'
+      return this.RangeManager.jsonRangesToMongo({
+        changes: [
+          {
+            id: change_id,
+            metadata: {
+              user_id,
+            },
+          },
+        ],
+        comments: [
+          {
+            id: comment_id,
+          },
+        ],
+      }).should.deep.equal({
+        changes: [
+          {
+            id: change_id,
+            metadata: {
+              user_id,
+            },
+          },
+        ],
+        comments: [
+          {
+            id: comment_id,
+          },
+        ],
+      })
+    })
+
+    return it('should be consistent when transformed through json -> mongo -> json', function () {
+      const change_id = ObjectId().toString()
+      const comment_id = ObjectId().toString()
+      const user_id = ObjectId().toString()
+      const thread_id = ObjectId().toString()
+      const ts = new Date().toJSON()
+      const ranges1 = {
+        changes: [
+          {
+            id: change_id,
+            op: { i: 'foo', p: 3 },
+            metadata: {
+              user_id,
+              ts,
+            },
+          },
+        ],
+        comments: [
+          {
+            id: comment_id,
+            op: { c: 'foo', p: 3, t: thread_id },
+          },
+        ],
+      }
+      const ranges1_copy = JSON.parse(JSON.stringify(ranges1)) // jsonRangesToMongo modifies in place
+      const ranges2 = JSON.parse(
+        JSON.stringify(this.RangeManager.jsonRangesToMongo(ranges1_copy))
+      )
+      return ranges1.should.deep.equal(ranges2)
+    })
+  })
+
+  return describe('shouldUpdateRanges', function () {
+    beforeEach(function () {
+      this.ranges = {
+        changes: [
+          {
+            id: ObjectId(),
+            op: { i: 'foo', p: 3 },
+            metadata: {
+              user_id: ObjectId(),
+              ts: new Date(),
+            },
+          },
+        ],
+        comments: [
+          {
+            id: ObjectId(),
+            op: { c: 'foo', p: 3, t: ObjectId() },
+          },
+        ],
+      }
+      return (this.ranges_copy = this.RangeManager.jsonRangesToMongo(
+        JSON.parse(JSON.stringify(this.ranges))
+      ))
+    })
+
+    describe('with a blank new range', function () {
+      return it('should throw an error', function () {
+        return expect(() => {
+          return this.RangeManager.shouldUpdateRanges(this.ranges, null)
+        }).to.throw(Error)
+      })
+    })
+
+    describe('with a blank old range', function () {
+      return it('should treat it like {}', function () {
+        this.RangeManager.shouldUpdateRanges(null, {}).should.equal(false)
+        return this.RangeManager.shouldUpdateRanges(
+          null,
+          this.ranges
+        ).should.equal(true)
+      })
+    })
+
+    describe('with no changes', function () {
+      return it('should return false', function () {
+        return this.RangeManager.shouldUpdateRanges(
+          this.ranges,
+          this.ranges_copy
+        ).should.equal(false)
+      })
+    })
+
+    return describe('with changes', function () {
+      it('should return true when the change id changes', function () {
+        this.ranges_copy.changes[0].id = ObjectId()
+        return this.RangeManager.shouldUpdateRanges(
+          this.ranges,
+          this.ranges_copy
+        ).should.equal(true)
+      })
+
+      it('should return true when the change user id changes', function () {
+        this.ranges_copy.changes[0].metadata.user_id = ObjectId()
+        return this.RangeManager.shouldUpdateRanges(
+          this.ranges,
+          this.ranges_copy
+        ).should.equal(true)
+      })
+
+      it('should return true when the change ts changes', function () {
+        this.ranges_copy.changes[0].metadata.ts = new Date(Date.now() + 1000)
+        return this.RangeManager.shouldUpdateRanges(
+          this.ranges,
+          this.ranges_copy
+        ).should.equal(true)
+      })
+
+      it('should return true when the change op changes', function () {
+        this.ranges_copy.changes[0].op.i = 'bar'
+        return this.RangeManager.shouldUpdateRanges(
+          this.ranges,
+          this.ranges_copy
+        ).should.equal(true)
+      })
+
+      it('should return true when the comment id changes', function () {
+        this.ranges_copy.comments[0].id = ObjectId()
+        return this.RangeManager.shouldUpdateRanges(
+          this.ranges,
+          this.ranges_copy
+        ).should.equal(true)
+      })
+
+      it('should return true when the comment offset changes', function () {
+        this.ranges_copy.comments[0].op.p = 17
+        return this.RangeManager.shouldUpdateRanges(
+          this.ranges,
+          this.ranges_copy
+        ).should.equal(true)
+      })
+
+      return it('should return true when the comment content changes', function () {
+        this.ranges_copy.comments[0].op.c = 'bar'
+        return this.RangeManager.shouldUpdateRanges(
+          this.ranges,
+          this.ranges_copy
+        ).should.equal(true)
+      })
+    })
+  })
+})