handle auto unarchive track changes

services/track-changes/app/coffee/DocArchiveManager.coffee

@@ -11,6 +11,8 @@ thirtySeconds = 30 * 1000
 module.exports = DocArchiveManager =
 
 	archiveAllDocsChanges: (project_id, callback = (error, docs) ->) ->
+		if settings.filestore?.backend != "s3"
+			return callback(null)
 		MongoManager.getProjectsDocs project_id, (error, docs) ->
 			if error?
 				return callback(error)
@@ -33,6 +35,8 @@ module.exports = DocArchiveManager =
 						callback()
 
 	unArchiveAllDocsChanges: (project_id, callback = (error, docs) ->) ->
+		if settings.filestore?.backend != "s3"
+			return callback(null)
 		MongoManager.getProjectsDocs project_id, (error, docs) ->
 			if error?
 				return callback(error)
@@ -43,7 +47,7 @@ module.exports = DocArchiveManager =
 			async.series jobs, callback
 
 	unArchiveDocChanges: (project_id, doc_id, callback)->
-		MongoManager.getDocChangesCount doc_id, (error, count) ->
+		MongoManager.getArchivedDocChanges doc_id, (error, count) ->
 			if count == 0
 				return callback()
 			else

services/track-changes/app/coffee/MongoManager.coffee

@@ -47,6 +47,7 @@ module.exports = MongoManager =
 
 
 	insertCompressedUpdate: (project_id, doc_id, update, temporary, callback = (error) ->) ->
+		inS3 = update.inS3?
 		update = {
 			doc_id: ObjectId(doc_id.toString())
 			project_id: ObjectId(project_id.toString())
@@ -54,6 +55,9 @@ module.exports = MongoManager =
 			meta:   update.meta
 			v:      update.v
 		}
+		if inS3?
+			update.inS3 = true
+		
 		if temporary
 			seconds = 1000
 			minutes = 60 * seconds
@@ -117,7 +121,7 @@ module.exports = MongoManager =
 		db.docHistory.ensureIndex { project_id: 1, "meta.end_ts": 1 }, { background: true }
 		# For finding all packs that affect a project (use a sparse index so only packs are included)
 		db.docHistory.ensureIndex { project_id: 1, "pack.0.meta.end_ts": 1, "meta.end_ts": 1}, { background: true, sparse: true }
-		# For finding updates that don't yet have a project_id and need it inserting
+		# For finding updates that dont yet have a project_id and need it inserting
 		db.docHistory.ensureIndex { doc_id: 1, project_id: 1 }, { background: true }
 		# For finding project meta-data
 		db.projectHistoryMetaData.ensureIndex { project_id: 1 }, { background: true }
@@ -133,6 +137,9 @@ module.exports = MongoManager =
 	getDocChangesCount: (doc_id, callback)->
 		db.docHistory.count doc_id: ObjectId(doc_id.toString()), {}, callback
 
+	getArchivedDocChanges: (doc_id, callback)->
+		db.docHistory.count { doc_id: ObjectId(doc_id.toString()) , inS3: true }, {}, callback
+
 	markDocHistoryAsArchived: (doc_id, callback)->
 		MongoManager.getLastCompressedUpdate doc_id, (error, update) ->
 			db.docHistory.update { _id: update._id }, { $set : { inS3 : true } }, (error)->

services/track-changes/app/coffee/UpdatesManager.coffee

@@ -6,6 +6,7 @@ WebApiManager = require "./WebApiManager"
 UpdateTrimmer = require "./UpdateTrimmer"
 logger = require "logger-sharelatex"
 async = require "async"
+DocArchiveManager = require "./DocArchiveManager"
 
 module.exports = UpdatesManager =
 	compressAndSaveRawUpdates: (project_id, doc_id, rawUpdates, temporary, callback = (error) ->) ->
@@ -94,7 +95,9 @@ module.exports = UpdatesManager =
 	getProjectUpdates: (project_id, options = {}, callback = (error, updates) ->) ->
 		UpdatesManager.processUncompressedUpdatesForProject project_id, (error) ->
 			return callback(error) if error?
-			MongoManager.getProjectUpdates project_id, options, callback
+			DocArchiveManager.unArchiveAllDocsChanges project_id, (error) ->
+				return callback(error,null) if error?
+				MongoManager.getProjectUpdates project_id, options, callback
 
 	getProjectUpdatesWithUserInfo: (project_id, options = {}, callback = (error, updates) ->) ->
 		UpdatesManager.getProjectUpdates project_id, options, (error, updates) ->