feat: Document presence indicator (#1114)

* Update websockets to allow joining document-based rooms

* dynamic websocket joining

* emit user.join/leave events when entering and exiting document rooms

* presence storage

* feat: frontend presence store

* lint

* UI updates

* First pass editing state

* refactoring

* Timeout per user/doc
lint

* Document data loading refactor to keep Socket mounted

* restore: Mark as viewed functionality
Add display of 'you' to collaborators

* fix: Socket/document remount when document slug changes due to title change

* Revert unneccessary package update

* Move editing ping interval to a shared constant

* fix: Flash of sidebar when loading page directly on editing mode

* separate document and revision loading

* add comments for socket events

* fix: Socket events getting bound multiple times on reconnect

* fix: Clear client side presence state on disconnect

* fix: Don't ignore server side error
Improved documentation

* More comments / why comments

* rename Socket -> SocketPresence

* fix: Handle redis is down
remove unneccessary join

* fix: PR feedback

server/api/views.js

@@ -2,7 +2,7 @@
 import Router from 'koa-router';
 import auth from '../middlewares/authentication';
 import { presentView } from '../presenters';
-import { View, Document, Event, User } from '../models';
+import { View, Document, Event } from '../models';
 import policy from '../policies';
 
 const { authorize } = policy;
@@ -16,16 +16,7 @@ router.post('views.list', auth(), async ctx => {
   const document = await Document.findByPk(documentId, { userId: user.id });
   authorize(user, 'read', document);
 
-  const views = await View.findAll({
-    where: { documentId },
-    order: [['updatedAt', 'DESC']],
-    include: [
-      {
-        model: User,
-        paranoid: false,
-      },
-    ],
-  });
+  const views = await View.findByDocument(documentId);
 
   ctx.body = {
     data: views.map(presentView),