Refactor, and remove the `source_project_display_name` prop from linkedFileData

app/coffee/Features/LinkedFiles/LinkedFilesController.coffee

@@ -5,6 +5,7 @@ Settings = require 'settings-sharelatex'
 logger = require 'logger-sharelatex'
 _ = require 'underscore'
 LinkedFilesErrors = require './LinkedFilesErrors'
+LinkedFilesHandler = require './LinkedFilesHandler'
 
 
 module.exports = LinkedFilesController = {

app/coffee/Features/LinkedFiles/LinkedFilesHandler.coffee

-LinkedFilesErrors = require './LinkedFilesErrors'
 FileWriter = require '../../infrastructure/FileWriter'
 EditorController = require '../Editor/EditorController'
 ProjectLocator = require '../Project/ProjectLocator'
+Project = require("../../models/Project").Project
+ProjectGetter = require("../Project/ProjectGetter")
 _ = require 'underscore'
+{
+	ProjectNotFoundError,
+	V1ProjectNotFoundError,
+	BadDataError
+} = require './LinkedFilesErrors'
 
 
 module.exports = LinkedFilesHandler =
@@ -16,6 +22,23 @@ module.exports = LinkedFilesHandler =
 			return callback(err) if err?
 			callback(null, file, path, parentFolder)
 
+	getSourceProject: (data, callback=(err, project)->) ->
+		projection = {_id: 1, name: 1}
+		if data.v1_source_doc_id?
+			Project.findOne {'overleaf.id': data.v1_source_doc_id}, projection, (err, project) ->
+				return callback(err) if err?
+				if !project?
+					return callback(new V1ProjectNotFoundError())
+				callback(null, project)
+		else if data.source_project_id?
+			ProjectGetter.getProject data.source_project_id, projection, (err, project) ->
+				return callback(err) if err?
+				if !project?
+					return callback(new ProjectNotFoundError())
+				callback(null, project)
+		else
+			callback(new BadDataError('neither v1 nor v2 id present'))
+
 	importFromStream: (
 		project_id,
 		readStream,

app/coffee/Features/LinkedFiles/ProjectFileAgent.coffee

 AuthorizationManager = require('../Authorization/AuthorizationManager')
 ProjectLocator = require('../Project/ProjectLocator')
 ProjectGetter = require('../Project/ProjectGetter')
-Project = require("../../models/Project").Project
 DocstoreManager = require('../Docstore/DocstoreManager')
 FileStoreHandler = require('../FileStore/FileStoreHandler')
 _ = require "underscore"
@@ -30,11 +29,9 @@ module.exports = ProjectFileAgent = {
 		@_checkAuth project_id, linkedFileData, user_id, (err, allowed) =>
 			return callback(err) if err?
 			return callback(new AccessDeniedError()) if !allowed
-			@_decorateLinkedFileData linkedFileData, (err, newLinkedFileData) =>
-				return callback(err) if err?
-				if !@_validate(newLinkedFileData)
+			if !@_validate(linkedFileData)
 				return callback(new BadDataError())
-				callback(null, newLinkedFileData)
+			callback(null, linkedFileData)
 
 	_go: (project_id, linkedFileData, name, parent_folder_id, user_id, callback) ->
 		linkedFileData = @_sanitizeData(linkedFileData)
@@ -107,28 +104,7 @@ module.exports = ProjectFileAgent = {
 		# Don't allow creation of linked-files with v1 doc ids
 		!data.v1_source_doc_id?
 
-	_getSourceProject: (data, callback=(err, project)->) ->
-		projection = {_id: 1, name: 1}
-		if data.v1_source_doc_id?
-			Project.findOne {'overleaf.id': data.v1_source_doc_id}, projection, (err, project) ->
-				return callback(err) if err?
-				if !project?
-					return callback(new V1ProjectNotFoundError())
-				callback(null, project)
-		else if data.source_project_id?
-			ProjectGetter.getProject data.source_project_id, projection, (err, project) ->
-				return callback(err) if err?
-				if !project?
-					return callback(new ProjectNotFoundError())
-				callback(null, project)
-		else
-			callback(new BadDataError('neither v1 nor v2 id present'))
-
-	_decorateLinkedFileData: (data, callback = (err, newData) ->) ->
-		callback = _.once(callback)
-		@_getSourceProject data, (err, project) ->
-			return callback(err) if err?
-			callback(err, _.extend(data, {source_project_display_name: project.name}))
+	_getSourceProject: LinkedFilesHandler.getSourceProject
 
 	_checkAuth: (project_id, data, current_user_id, callback = (error, allowed)->) ->
 		callback = _.once(callback)

app/coffee/Features/LinkedFiles/ProjectOutputFileAgent.coffee

@@ -21,11 +21,9 @@ module.exports = ProjectOutputFileAgent = {
 		@_checkAuth project_id, linkedFileData, user_id, (err, allowed) =>
 			return callback(err) if err?
 			return callback(new AccessDeniedError()) if !allowed
-			@_decorateLinkedFileData linkedFileData, (err, newLinkedFileData) =>
-				return callback(err) if err?
-				if !@_validate(newLinkedFileData)
+			if !@_validate(linkedFileData)
 				return callback(new BadDataError())
-				callback(null, newLinkedFileData)
+			callback(null, linkedFileData)
 
 	createLinkedFile: (project_id, linkedFileData, name, parent_folder_id, user_id, callback) ->
 		if !@_canCreate(linkedFileData)
@@ -92,9 +90,7 @@ module.exports = ProjectOutputFileAgent = {
 
 	_canCreate: ProjectFileAgent._canCreate
 
-	_getSourceProject: ProjectFileAgent._getSourceProject
-
-	_decorateLinkedFileData: ProjectFileAgent._decorateLinkedFileData
+	_getSourceProject: LinkedFilesHandler.getSourceProject
 
 	_validate: (data) ->
 		return (

app/views/project/editor/binary-file.pug

@@ -56,9 +56,9 @@ div.binary-file.full-size(
 				|
 				a(ng-if='!openFile.linkedFileData.v1_source_doc_id'
 					ng-href='/project/{{openFile.linkedFileData.source_project_id}}' target="_blank")
-					| {{ openFile.linkedFileData.source_project_display_name }}
+					| Another project
 				span(ng-if='openFile.linkedFileData.v1_source_doc_id')
-					| {{ openFile.linkedFileData.source_project_display_name }}
+					| Another project
 				| /{{ openFile.linkedFileData.source_entity_path.slice(1) }},
 				|
 				| at {{ openFile.created | formatDate:'h:mm a' }} {{ openFile.created | relativeDate }}
@@ -71,9 +71,9 @@ div.binary-file.full-size(
 				|
 				a(ng-if='!openFile.linkedFileData.v1_source_doc_id'
 					ng-href='/project/{{openFile.linkedFileData.source_project_id}}' target="_blank")
-					| {{ openFile.linkedFileData.source_project_display_name }}
+					| Another project
 				span(ng-if='openFile.linkedFileData.v1_source_doc_id')
-					| {{ openFile.linkedFileData.source_project_display_name }}
+					| Another project
 				| : {{ openFile.linkedFileData.source_output_file_path }},
 				|
 				| at {{ openFile.created | formatDate:'h:mm a' }} {{ openFile.created | relativeDate }}

test/acceptance/coffee/LinkedFilesTests.coffee

@@ -118,7 +118,6 @@ describe "LinkedFiles", ->
 						provider: 'project_file',
 						source_project_id: @project_two_id,
 						source_entity_path: "/#{@source_doc_name}",
-						source_project_display_name: "plf-test-two"
 					}
 					expect(firstFile.name).to.equal('test-link.txt')
 					done()
@@ -393,7 +392,6 @@ describe "LinkedFiles", ->
 						provider: 'project_output_file',
 						source_project_id: @project_two_id,
 						source_output_file_path: "output.pdf",
-						source_project_display_name: "output-test-two"
 						build_id: '1234-abcd'
 					}
 					expect(firstFile.name).to.equal('test.pdf')
@@ -430,7 +428,8 @@ describe "LinkedFiles", ->
 							linkedFileData: {
 								provider: "project_output_file",
 								v1_source_doc_id: 9999999,  # We won't find this id in the database
-								source_output_file_path: "output.pdf"
+								source_output_file_path: "output.pdf",
+								build_id: '123'
 							},
 							_id: "abcdef",
 							rev: 0,