Websocket Support (#937)

* Atom / RSS meta link

* Spike

* Feeling good about this spike now

* Remove document.collection

* Remove koa.ctx from all presenters to make them portable outside requests

* Remove full serialized model from events
Move events.add to controllers for now, will eventually be in commands

* collections.create event
parentDocument -> parentDocumentId

* Fix up deprecated tests

* Fixed: Doc creation

* documents.move

* Handle collection deleted

* 💚

* Authorize room join requests

* Move starred data structure
Account for documents with no context on sockets

* Add socket.io-redis

* Add WEBSOCKETS_ENABLED env variable to disable websockets entirely for self hosted
New installations will default to true, existing installations to false

* 💚 No need for promise response here

* Reload notice

server/utils/jwt.js

@@ -0,0 +1,25 @@
+// @flow
+import JWT from 'jsonwebtoken';
+import { AuthenticationError } from '../errors';
+import { User } from '../models';
+
+export async function getUserForJWT(token: string) {
+  let payload;
+  try {
+    payload = JWT.decode(token);
+  } catch (err) {
+    throw new AuthenticationError('Unable to decode JWT token');
+  }
+
+  if (!payload) throw new AuthenticationError('Invalid token');
+
+  const user = await User.findById(payload.id);
+
+  try {
+    JWT.verify(token, user.jwtSecret);
+  } catch (err) {
+    throw new AuthenticationError('Invalid token');
+  }
+
+  return user;
+}