Check online users, update authorships, save revisions in update note content API

Signed-off-by: James Tsai <jamesscamel@gmail.com>

lib/note/index.js

@@ -2,12 +2,13 @@
 
 const config = require('../config')
 const logger = require('../logger')
-const { Note, User } = require('../models')
+const { Note, User, Revision } = require('../models')
 
 const { newCheckViewPermission, errorForbidden, responseCodiMD, errorNotFound, errorInternalError } = require('../response')
 const { updateHistory, historyDelete } = require('../history')
 const { actionPublish, actionSlide, actionInfo, actionDownload, actionPDF, actionGist, actionRevision, actionPandoc } = require('./noteActions')
 const realtime = require('../realtime/realtime')
+const moment = require('moment')
 
 async function getNoteById (noteId, { includeUser } = { includeUser: false }) {
   const id = await Note.parseNoteIdAsync(noteId)
@@ -281,13 +282,37 @@ const updateNote = async (req, res) => {
         return errorNotFound(req, res)
       }
 
+      if (realtime.isNoteExistsInPool(noteId)) {
+        logger.error('Update note failed: There are online users opening this note.')
+        return res.status('403').send({ status: 'error', message: 'Update API can only be used when no users is online' })
+      }
+
+      const now = Date.now()
+      const content = req.body.content
       const updated = await note.update({
-        content: req.body.content
+        content: content,
+        lastchangeAt: moment(now).format('YYYY-MM-DD HH:mm:ss'),
+        authorship: [
+          [
+            req.user.id,
+            0,
+            content.length,
+            now,
+            now
+          ]
+        ]
       })
+
       if (!updated) {
-        logger.error('Update note failed: Write data error.')
+        logger.error('Update note failed: Write note content error.')
         return errorInternalError(req, res)
       }
+
+      Revision.saveNoteRevision(note, (err, revision) => {
+        if (err) return errorInternalError(req, res)
+        if (!revision) return errorNotFound(req, res)
+      })
+
       res.send({
         status: 'ok'
       })