Support an incoming undo flag for history restores

services/document-updater/app/coffee/DocumentManager.coffee

@@ -43,7 +43,7 @@ module.exports = DocumentManager =
 					return callback(error) if error?
 					callback null, lines, version, ops, ranges
 
-	setDoc: (project_id, doc_id, newLines, source, user_id, _callback = (error) ->) ->
+	setDoc: (project_id, doc_id, newLines, source, user_id, undoing, _callback = (error) ->) ->
 		timer = new Metrics.Timer("docManager.setDoc")
 		callback = (args...) ->
 			timer.done()
@@ -63,6 +63,9 @@ module.exports = DocumentManager =
 			logger.log doc_id: doc_id, project_id: project_id, oldLines: oldLines, newLines: newLines, "setting a document via http"
 			DiffCodec.diffAsShareJsOp oldLines, newLines, (error, op) ->
 				return callback(error) if error?
+				if undoing
+					for o in op or []
+						o.u = true # Turn on undo flag for each op for track changes
 				update =
 					doc: doc_id
 					op: op
@@ -161,9 +164,9 @@ module.exports = DocumentManager =
 		UpdateManager = require "./UpdateManager"
 		UpdateManager.lockUpdatesAndDo DocumentManager.getDocAndRecentOps, project_id, doc_id, fromVersion, callback
 		
-	setDocWithLock: (project_id, doc_id, lines, source, user_id, callback = (error) ->) ->
+	setDocWithLock: (project_id, doc_id, lines, source, user_id, undoing, callback = (error) ->) ->
 		UpdateManager = require "./UpdateManager"
-		UpdateManager.lockUpdatesAndDo DocumentManager.setDoc, project_id, doc_id, lines, source, user_id, callback
+		UpdateManager.lockUpdatesAndDo DocumentManager.setDoc, project_id, doc_id, lines, source, user_id, undoing, callback
 		
 	flushDocIfLoadedWithLock: (project_id, doc_id, callback = (error) ->) ->
 		UpdateManager = require "./UpdateManager"

services/document-updater/app/coffee/HttpController.coffee

@@ -40,16 +40,14 @@ module.exports = HttpController =
 	setDoc: (req, res, next = (error) ->) ->
 		doc_id = req.params.doc_id
 		project_id = req.params.project_id
-		lines = req.body.lines
-		source = req.body.source
-		user_id = req.body.user_id
+		{lines, source, user_id, undoing} = req.body
 		lineSize = HttpController._getTotalSizeOfLines(lines)
 		if lineSize > TWO_MEGABYTES
 			logger.log {project_id, doc_id, source, lineSize, user_id}, "document too large, returning 406 response"
 			return res.send 406
-		logger.log project_id: project_id, doc_id: doc_id, lines: lines, source: source, user_id: user_id, "setting doc via http"
+		logger.log {project_id, doc_id, lines, source, user_id, undoing}, "setting doc via http"
 		timer = new Metrics.Timer("http.setDoc")
-		DocumentManager.setDocWithLock project_id, doc_id, lines, source, user_id, (error) ->
+		DocumentManager.setDocWithLock project_id, doc_id, lines, source, user_id, undoing, (error) ->
 			timer.done()
 			return next(error) if error?
 			logger.log project_id: project_id, doc_id: doc_id, "set doc via http"

services/document-updater/test/acceptance/coffee/SettingADocumentTests.coffee

@@ -41,7 +41,7 @@ describe "Setting a document", ->
 				DocUpdaterClient.sendUpdate @project_id, @doc_id, @update, (error) =>
 					throw error if error?
 					setTimeout () =>
-						DocUpdaterClient.setDocLines @project_id, @doc_id, @newLines, @source, @user_id, (error, res, body) =>
+						DocUpdaterClient.setDocLines @project_id, @doc_id, @newLines, @source, @user_id, false, (error, res, body) =>
 							@statusCode = res.statusCode
 							done()
 					, 200
@@ -74,7 +74,7 @@ describe "Setting a document", ->
 		before (done) ->
 			[@project_id, @doc_id] = [DocUpdaterClient.randomId(), DocUpdaterClient.randomId()]
 			MockWebApi.insertDoc @project_id, @doc_id, {lines: @lines, version: @version}
-			DocUpdaterClient.setDocLines @project_id, @doc_id, @newLines, @source, @user_id, (error, res, body) =>
+			DocUpdaterClient.setDocLines @project_id, @doc_id, @newLines, @source, @user_id, false, (error, res, body) =>
 				@statusCode = res.statusCode
 				setTimeout done, 200
 		
@@ -94,3 +94,60 @@ describe "Setting a document", ->
 				throw error if error?
 				expect(lines).to.not.exist
 				done()
+	
+	describe "with track changes", ->
+		before ->
+			@lines = ["one", "one and a half", "two", "three"]
+			@id_seed = "587357bd35e64f6157"
+			@update =
+				doc: @doc_id
+				op: [{
+					d: "one and a half\n"
+					p: 4
+				}]
+				meta:
+					tc: @id_seed
+					user_id: @user_id
+				v: @version
+
+		describe "with the undo flag", ->
+			before (done) ->
+				[@project_id, @doc_id] = [DocUpdaterClient.randomId(), DocUpdaterClient.randomId()]
+				MockWebApi.insertDoc @project_id, @doc_id, {lines: @lines, version: @version}
+				DocUpdaterClient.preloadDoc @project_id, @doc_id, (error) =>
+					throw error if error?
+					DocUpdaterClient.sendUpdate @project_id, @doc_id, @update, (error) =>
+						throw error if error?
+						# Go back to old lines, with undo flag
+						DocUpdaterClient.setDocLines @project_id, @doc_id, @lines, @source, @user_id, true, (error, res, body) =>
+							@statusCode = res.statusCode
+							setTimeout done, 200
+			
+			it "should undo the tracked changes", (done) ->
+				DocUpdaterClient.getDoc @project_id, @doc_id, (error, res, data) =>
+					throw error if error?
+					ranges = data.ranges
+					expect(ranges.changes).to.be.undefined
+					done()
+			
+		describe "without the undo flag", ->
+			before (done) ->
+				[@project_id, @doc_id] = [DocUpdaterClient.randomId(), DocUpdaterClient.randomId()]
+				MockWebApi.insertDoc @project_id, @doc_id, {lines: @lines, version: @version}
+				DocUpdaterClient.preloadDoc @project_id, @doc_id, (error) =>
+					throw error if error?
+					DocUpdaterClient.sendUpdate @project_id, @doc_id, @update, (error) =>
+						throw error if error?
+						# Go back to old lines, without undo flag
+						DocUpdaterClient.setDocLines @project_id, @doc_id, @lines, @source, @user_id, false, (error, res, body) =>
+							@statusCode = res.statusCode
+							setTimeout done, 200
+			
+			it "should not undo the tracked changes", (done) ->
+				DocUpdaterClient.getDoc @project_id, @doc_id, (error, res, data) =>
+					throw error if error?
+					ranges = data.ranges
+					expect(ranges.changes.length).to.equal 1
+					done()
+
+				

services/document-updater/test/acceptance/coffee/helpers/DocUpdaterClient.coffee

@@ -53,13 +53,14 @@ module.exports = DocUpdaterClient =
 		request.post "http://localhost:3003/project/#{project_id}/doc/#{doc_id}/flush", (error, res, body) ->
 			callback error, res, body
 
-	setDocLines: (project_id, doc_id, lines, source, user_id, callback = (error) ->) ->
+	setDocLines: (project_id, doc_id, lines, source, user_id, undoing, callback = (error) ->) ->
 		request.post {
 			url: "http://localhost:3003/project/#{project_id}/doc/#{doc_id}"
 			json:
 				lines: lines
 				source: source
 				user_id: user_id
+				undoing: undoing
 		}, (error, res, body) ->
 			callback error, res, body
 

services/document-updater/test/unit/coffee/DocumentManager/DocumentManagerTests.coffee

@@ -194,6 +194,7 @@ describe "DocumentManager", ->
 			beforeEach ->
 				@beforeLines = ["before", "lines"]
 				@afterLines = ["after", "lines"]
+				@ops = [{ i: "foo", p: 4 }, { d: "bar", p: 42 }]
 				@DocumentManager.getDoc = sinon.stub().callsArgWith(2, null, @beforeLines, @version, @ranges, true)
 				@DiffCodec.diffAsShareJsOp = sinon.stub().callsArgWith(2, null, @ops)
 				@UpdateManager.applyUpdate = sinon.stub().callsArgWith(3, null)
@@ -202,7 +203,7 @@ describe "DocumentManager", ->
 
 			describe "when already loaded", ->
 				beforeEach ->
-					@DocumentManager.setDoc @project_id, @doc_id, @afterLines, @source, @user_id, @callback
+					@DocumentManager.setDoc @project_id, @doc_id, @afterLines, @source, @user_id, false, @callback
 
 				it "should get the current doc lines", ->
 					@DocumentManager.getDoc
@@ -246,7 +247,7 @@ describe "DocumentManager", ->
 			describe "when not already loaded", ->
 				beforeEach ->
 					@DocumentManager.getDoc = sinon.stub().callsArgWith(2, null, @beforeLines, @version, false)
-					@DocumentManager.setDoc @project_id, @doc_id, @afterLines, @source, @user_id, @callback
+					@DocumentManager.setDoc @project_id, @doc_id, @afterLines, @source, @user_id, false, @callback
 
 				it "should flush and delete the doc from the doc updater", ->
 					@DocumentManager.flushAndDeleteDoc
@@ -255,13 +256,24 @@ describe "DocumentManager", ->
 
 			describe "without new lines", ->
 				beforeEach ->
-					@DocumentManager.setDoc @project_id, @doc_id, null, @source, @user_id, @callback
+					@DocumentManager.setDoc @project_id, @doc_id, null, @source, @user_id, false, @callback
 
 				it "should return the callback with an error", ->
 					@callback.calledWith(new Error("No lines were passed to setDoc"))
 					
 				it "should not try to get the doc lines", ->
 					@DocumentManager.getDoc.called.should.equal false
+			
+			describe "with the undoing flag", ->
+				beforeEach ->
+					# Copy ops so we don't interfere with other tests
+					@ops = [{ i: "foo", p: 4 }, { d: "bar", p: 42 }]
+					@DiffCodec.diffAsShareJsOp = sinon.stub().callsArgWith(2, null, @ops)
+					@DocumentManager.setDoc @project_id, @doc_id, @afterLines, @source, @user_id, true, @callback
+				
+				it "should set the undo flag on each op", ->
+					for op in @ops
+						op.u.should.equal true
 	
 	describe "acceptChanges", ->
 		beforeEach ->

services/document-updater/test/unit/coffee/HttpController/HttpControllerTests.coffee

@@ -125,15 +125,16 @@ describe "HttpController", ->
 					lines: @lines
 					source: @source
 					user_id: @user_id
+					undoing: @undoing = true
 
 		describe "successfully", ->
 			beforeEach ->
-				@DocumentManager.setDocWithLock = sinon.stub().callsArgWith(5)
+				@DocumentManager.setDocWithLock = sinon.stub().callsArgWith(6)
 				@HttpController.setDoc(@req, @res, @next)
 
 			it "should set the doc", ->
 				@DocumentManager.setDocWithLock
-					.calledWith(@project_id, @doc_id, @lines, @source, @user_id)
+					.calledWith(@project_id, @doc_id, @lines, @source, @user_id, @undoing)
 					.should.equal true
 
 			it "should return a successful No Content response", ->
@@ -143,7 +144,7 @@ describe "HttpController", ->
 
 			it "should log the request", ->
 				@logger.log
-					.calledWith(doc_id: @doc_id, project_id: @project_id, lines: @lines, source: @source, user_id: @user_id, "setting doc via http")
+					.calledWith(doc_id: @doc_id, project_id: @project_id, lines: @lines, source: @source, user_id: @user_id, undoing: @undoing, "setting doc via http")
 					.should.equal true
 
 			it "should time the request", ->
@@ -151,7 +152,7 @@ describe "HttpController", ->
 
 		describe "when an errors occurs", ->
 			beforeEach ->
-				@DocumentManager.setDocWithLock = sinon.stub().callsArgWith(5, new Error("oops"))
+				@DocumentManager.setDocWithLock = sinon.stub().callsArgWith(6, new Error("oops"))
 				@HttpController.setDoc(@req, @res, @next)
 
 			it "should call next with the error", ->
@@ -165,7 +166,7 @@ describe "HttpController", ->
 				for _ in [0..200000]
 					lines.push "test test test"
 				@req.body.lines = lines
-				@DocumentManager.setDocWithLock = sinon.stub().callsArgWith(5)
+				@DocumentManager.setDocWithLock = sinon.stub().callsArgWith(6)
 				@HttpController.setDoc(@req, @res, @next)
 
 			it 'should send back a 406 response', ->