update DocumentUpdaterHandler.updateProjectStructure to support entity deletions

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

@@ -207,8 +207,8 @@ module.exports = DocumentUpdaterHandler =
 	updateProjectStructure : (project_id, userId, changes, callback = (error) ->)->
 		return callback() if !settings.apis.project_history?.enabled
 
-		docUpdates = DocumentUpdaterHandler._getRenameUpdates('doc', changes.oldDocs, changes.newDocs)
-		fileUpdates = DocumentUpdaterHandler._getRenameUpdates('file', changes.oldFiles, changes.newFiles)
+		docUpdates = DocumentUpdaterHandler._getUpdates('doc', changes.oldDocs, changes.newDocs)
+		fileUpdates = DocumentUpdaterHandler._getUpdates('file', changes.oldFiles, changes.newFiles)
 
 		timer = new metrics.Timer("set-document")
 		url = "#{settings.apis.documentupdater.url}/project/#{project_id}"
@@ -230,7 +230,7 @@ module.exports = DocumentUpdaterHandler =
 				logger.error {project_id, url}, "doc updater returned a non-success status code: #{res.statusCode}"
 				callback new Error("doc updater returned a non-success status code: #{res.statusCode}")
 
-	_getRenameUpdates: (entityType, oldEntities, newEntities) ->
+	_getUpdates: (entityType, oldEntities, newEntities) ->
 		oldEntities ||= []
 		newEntities ||= []
 		updates = []
@@ -255,6 +255,15 @@ module.exports = DocumentUpdaterHandler =
 					pathname: oldEntity.path
 					newPathname: newEntity.path
 
+		for id, oldEntity of oldEntitiesHash
+			newEntity = newEntitiesHash[id]
+
+			if !newEntity?
+				# entity deleted
+				updates.push
+					id: id
+					pathname: oldEntity.path
+
 		updates
 
 PENDINGUPDATESKEY = "PendingUpdates"

services/web/test/unit/coffee/DocumentUpdater/DocumentUpdaterHandlerTests.coffee

@@ -478,14 +478,21 @@ describe 'DocumentUpdaterHandler', ->
 							.should.equal true
 						done()
 
-			describe "when a doc has been deleted", ->
-				it 'should do nothing', (done) ->
+			describe "when an entity has been deleted", ->
+				it 'should end the structure update to the document updater', (done) ->
 					@docId = new ObjectId()
 					@changes = oldDocs: [
 						{ path: '/foo', docLines: 'a\nb', doc: _id: @docId }
 					]
 
+					docUpdates = [
+						id: @docId.toString(),
+						pathname: "/foo",
+					]
+
 					@handler.updateProjectStructure @project_id, @user_id, @changes, () =>
-						@request.post.called.should.equal false
+						@request.post
+							.calledWith(url: @url, json: {docUpdates, fileUpdates: [], userId: @user_id})
+							.should.equal true
 						done()