add resync project history endpoint

services/web/app/coffee/Features/DocumentUpdater/DocumentUpdaterHandler.coffee

@@ -5,7 +5,9 @@ _ = require 'underscore'
 async = require 'async'
 logger = require('logger-sharelatex')
 metrics = require('metrics-sharelatex')
+FileStoreHandler = require("../FileStore/FileStoreHandler")
 Project = require("../../models/Project").Project
+ProjectGetter = require "../Project/ProjectGetter"
 
 module.exports = DocumentUpdaterHandler =
 	flushProjectToMongo: (project_id, callback = (error) ->)->
@@ -203,6 +205,33 @@ module.exports = DocumentUpdaterHandler =
 				logger.error {project_id, doc_id, thread_id}, "doc updater returned a non-success status code: #{res.statusCode}"
 				callback new Error("doc updater returned a non-success status code: #{res.statusCode}")
 
+	resyncProject: (project_id, callback) ->
+		ProjectEntityHandler = require "../Project/ProjectEntityHandler"
+		ProjectGetter.getProject project_id, rootFolder: true, (error, project) ->
+			return callback(error) if error?
+			ProjectEntityHandler.getAllEntitiesFromProject project, (error, docs, files) ->
+				return callback(error) if error?
+
+				docs = _.map docs, (doc) ->
+					doc: doc.doc._id
+					path: doc.path
+
+				files = _.map files, (file) ->
+					file: file.file._id
+					path: file.path
+					url: FileStoreHandler._buildUrl(project_id, file.file._id)
+
+				request.post
+					url: "#{settings.apis.documentupdater.url}/project/#{project_id}/resync"
+					json: { docs, files }
+				, (error, res, body) ->
+					if error?
+						logger.error {error, project_id}, "error resyncing project in doc updater"
+						callback(error)
+					else if res.statusCode >= 200 and res.statusCode < 300
+						logger.log {project_id}, "resynced project in doc updater"
+						callback()
+
 	updateProjectStructure : (project_id, userId, changes, callback = (error) ->)->
 		return callback() if !settings.apis.project_history?.sendProjectStructureOps
 		Project.findOne {_id: project_id}, {version:true}, (err, currentProject) ->

services/web/app/coffee/Features/History/HistoryController.coffee

@@ -2,6 +2,7 @@ logger = require "logger-sharelatex"
 request = require "request"
 settings = require "settings-sharelatex"
 AuthenticationController = require "../Authentication/AuthenticationController"
+DocumentUpdaterHandler = require "../DocumentUpdater/DocumentUpdaterHandler"
 ProjectDetailsHandler = require "../Project/ProjectDetailsHandler"
 HistoryManager = require "./HistoryManager"
 
@@ -62,3 +63,9 @@ module.exports = HistoryController =
 			return settings.apis.project_history.url
 		else
 			return settings.apis.trackchanges.url
+
+	resyncProject: (req, res, next = (error) ->) ->
+		project_id = req.params.Project_id
+		DocumentUpdaterHandler.resyncProject project_id, (error) ->
+			return next(error) if error?
+			res.sendStatus 204

services/web/app/coffee/router.coffee

@@ -201,6 +201,7 @@ module.exports = class Router
 		webRouter.get  "/project/:Project_id/doc/:doc_id/diff", AuthorizationMiddlewear.ensureUserCanReadProject, HistoryController.selectHistoryApi, HistoryController.proxyToHistoryApi
 		webRouter.get  "/project/:Project_id/diff", AuthorizationMiddlewear.ensureUserCanReadProject, HistoryController.selectHistoryApi, HistoryController.proxyToHistoryApiAndInjectUserDetails
 		webRouter.post "/project/:Project_id/doc/:doc_id/version/:version_id/restore", AuthorizationMiddlewear.ensureUserCanReadProject, HistoryController.selectHistoryApi, HistoryController.proxyToHistoryApi
+		privateApiRouter.post "/project/:Project_id/history/resync", AuthenticationController.httpAuth, HistoryController.resyncProject
 
 		webRouter.get  '/Project/:Project_id/download/zip', AuthorizationMiddlewear.ensureUserCanReadProject, ProjectDownloadsController.downloadProject
 		webRouter.get  '/project/download/zip', AuthorizationMiddlewear.ensureUserCanReadMultipleProjects, ProjectDownloadsController.downloadMultipleProjects