Proxy get doc requests to the docstore

services/web/app/coffee/Features/Docstore/DocstoreManager.coffee

@@ -27,7 +27,23 @@ module.exports = DocstoreManager =
 				callback(null, docs)
 			else
 				error = new Error("docstore api responded with non-success code: #{res.statusCode}")
-				logger.error err: error, project_id: project_id, "error getting all docs in docstore"
+				logger.error err: error, project_id: project_id, "error getting all docs from docstore"
+				callback(error)
+
+	getDoc: (project_id, doc_id, callback = (error, lines, version, rev) ->) ->
+		logger.log project_id: project_id, doc_id: doc_id, "getting doc in docstore api"
+		url = "#{settings.apis.docstore.url}/project/#{project_id}/doc/#{doc_id}"
+		request.get {
+			url: url
+			json: true
+		}, (error, res, doc) ->
+			return callback(error) if error?
+			if 200 <= res.statusCode < 300
+				logger.log doc_id: doc_id, project_id: project_id, version: doc.version, rev: doc.rev, "got doc from docstore api"
+				callback(null, doc.lines, doc.version, doc.rev)
+			else
+				error = new Error("docstore api responded with non-success code: #{res.statusCode}")
+				logger.error err: error, project_id: project_id, doc_id: doc_id, "error getting doc from docstore"
 				callback(error)
 
 	updateDoc: (project_id, doc_id, lines, version, callback = (error, rev) ->) ->

services/web/app/coffee/Features/Documents/DocumentController.coffee

@@ -1,25 +1,23 @@
-ProjectLocator = require "../Project/ProjectLocator"
 ProjectEntityHandler = require "../Project/ProjectEntityHandler"
 Errors = require "../../errors"
 logger = require("logger-sharelatex")
 
 module.exports =
-
 	getDocument: (req, res, next = (error) ->) ->
 		project_id = req.params.Project_id
 		doc_id = req.params.doc_id
 		logger.log doc_id:doc_id, project_id:project_id, "receiving get document request from api (docupdater)"
-		ProjectLocator.findElement project_id: project_id, element_id: doc_id, type: "doc", (error, doc) ->
+		ProjectEntityHandler.getDoc project_id, doc_id, (error, lines, version, rev) ->
 			if error?
 				logger.err err:error, doc_id:doc_id, project_id:project_id, "error finding element for getDocument"
 				return next(error)
 			res.type "json"
 			res.send JSON.stringify {
-				lines: doc.lines
+				lines: lines
+				version: version
 			}
 			req.session.destroy()
 
-
 	setDocument: (req, res, next = (error) ->) ->
 		project_id = req.params.Project_id
 		doc_id = req.params.doc_id

services/web/app/coffee/Features/Project/ProjectEntityHandler.coffee

@@ -111,6 +111,9 @@ module.exports = ProjectEntityHandler =
 		logger.log sl_req_id: sl_req_id, project_id: project_id, "removing root doc"
 		Project.update {_id:project_id}, {$unset: {rootDoc_id: true}}, {}, callback
 
+	getDoc: (project_id, doc_id, callback = (error, lines, version, rev) ->) ->
+		DocstoreManager.getDoc project_id, doc_id, callback
+
 	addDoc: (project_or_id, folder_id, docName, docLines, sl_req_id, callback = (error, doc, folder_id) ->)=>
 		{callback, sl_req_id} = slReqIdHelper.getCallbackAndReqId(callback, sl_req_id)
 		Project.getProject project_or_id, "", (err, project) ->

services/web/test/UnitTests/coffee/Docstore/DocstoreManagerTests.coffee

@@ -92,6 +92,46 @@ describe "DocstoreManager", ->
 					}, "error updating doc in docstore")
 					.should.equal true
 
+	describe "getDoc", ->
+		beforeEach ->
+			@doc =
+				lines:   @lines = ["mock", "doc", "lines"]
+				version: @version = 42
+				rev:     @rev = 5
+
+		describe "with a successful response code", ->
+			beforeEach ->
+				@request.get = sinon.stub().callsArgWith(1, null, statusCode: 204, @doc)
+				@DocstoreManager.getDoc @project_id, @doc_id, @callback
+
+			it "should get the doc from the docstore api", ->
+				@request.get
+					.calledWith({
+						url: "#{@settings.apis.docstore.url}/project/#{@project_id}/doc/#{@doc_id}"
+						json: true
+					})
+					.should.equal true
+
+			it "should call the callback with the lines, version and rev", ->
+				@callback.calledWith(null, @lines, @version, @rev).should.equal true
+
+		describe "with a failed response code", ->
+			beforeEach ->
+				@request.get = sinon.stub().callsArgWith(1, null, statusCode: 500, "")
+				@DocstoreManager.getDoc @project_id, @doc_id, @callback
+
+			it "should call the callback with an error", ->
+				@callback.calledWith(new Error("docstore api responded with non-success code: 500")).should.equal true
+
+			it "should log the error", ->
+				@logger.error
+					.calledWith({
+						err: new Error("docstore api responded with a non-success code: 500")
+						project_id: @project_id
+						doc_id: @doc_id
+					}, "error getting doc from docstore")
+					.should.equal true
+
 	describe "getAllDocs", ->
 		describe "with a successful response code", ->
 			beforeEach ->
@@ -122,5 +162,5 @@ describe "DocstoreManager", ->
 					.calledWith({
 						err: new Error("docstore api responded with a non-success code: 500")
 						project_id: @project_id
-					}, "error getting all docs in docstore")
+					}, "error getting all docs from docstore")
 					.should.equal true

services/web/test/UnitTests/coffee/Documents/DocumentControllerTests.coffee

@@ -12,7 +12,6 @@ Errors = require "../../../../app/js/errors"
 describe "DocumentController", ->
 	beforeEach ->
 		@DocumentController = SandboxedModule.require modulePath, requires:  
-			"../Project/ProjectLocator": @ProjectLocator = {}
 			"../Project/ProjectEntityHandler": @ProjectEntityHandler = {}
 		@res = new MockResponse()
 		@req = new MockRequest()
@@ -20,6 +19,8 @@ describe "DocumentController", ->
 		@project_id = "project-id-123"
 		@doc_id = "doc-id-123"
 		@doc_lines = ["one", "two", "three"]
+		@version = 42
+		@rev = 5
 
 	describe "getDocument", ->
 		beforeEach ->
@@ -27,25 +28,25 @@ describe "DocumentController", ->
 				Project_id: @project_id
 				doc_id: @doc_id
 
-
 		describe "when the document exists", ->
 			beforeEach ->
-				@ProjectLocator.findElement = sinon.stub().callsArgWith(1, null, lines: @doc_lines)
+				@ProjectEntityHandler.getDoc = sinon.stub().callsArgWith(2, null, @doc_lines, @version, @rev)
 				@DocumentController.getDocument(@req, @res, @next)
 
 			it "should get the document from Mongo", ->
-				@ProjectLocator.findElement
-					.calledWith(project_id: @project_id, element_id: @doc_id, type: "doc")
+				@ProjectEntityHandler.getDoc
+					.calledWith(@project_id, @doc_id)
 					.should.equal true
 
 			it "should return the document data to the client as JSON", ->
 				@res.type.should.equal "json"
 				@res.body.should.equal JSON.stringify
 					lines: @doc_lines
+					version: @version
 
 		describe "when the document doesn't exist", ->
 			beforeEach ->
-				@ProjectLocator.findElement = sinon.stub().callsArgWith(1, new Errors.NotFoundError("not found"), null)
+				@ProjectEntityHandler.getDoc = sinon.stub().callsArgWith(2, new Errors.NotFoundError("not found"), null)
 				@DocumentController.getDocument(@req, @res, @next)
 
 			it "should call next with the NotFoundError", ->

services/web/test/UnitTests/coffee/Project/ProjectEntityHandlerTests.coffee

@@ -10,6 +10,7 @@ tk = require 'timekeeper'
 
 describe 'ProjectEntityHandler', ->
 	project_id = '4eecb1c1bffa66588e0000a1'
+	doc_id = '4eecb1c1bffa66588e0000a2'
 	folder_id = "4eecaffcbffa66588e000008"
 	rootFolderId = "4eecaffcbffa66588e000007"
 	
@@ -279,6 +280,22 @@ describe 'ProjectEntityHandler', ->
 						done()
 			@ProjectEntityHandler._removeElementFromMongoArray model, id, mongoPath, ->
 
+	describe 'getDoc', ->
+		beforeEach ->
+			@lines = ["mock", "doc", "lines"]
+			@version = 42
+			@rev = 5
+			@DocstoreManager.getDoc = sinon.stub().callsArgWith(2, null, @lines, @version, @rev)
+			@ProjectEntityHandler.getDoc project_id, doc_id, @callback
+
+		it "should call the docstore", ->
+			@DocstoreManager.getDoc
+				.calledWith(project_id, doc_id)
+				.should.equal true
+
+		it "should call the callback with the lines, version and rev", ->
+			@callback.calledWith(null, @lines, @version, @rev).should.equal true
+
 	describe 'addDoc', ->
 		beforeEach ->
 			@name = "some new doc"