922 lines
26 KiB
JavaScript
922 lines
26 KiB
JavaScript
'use strict'
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// realtime
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// external modules
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const cookie = require('cookie')
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const cookieParser = require('cookie-parser')
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const async = require('async')
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const randomcolor = require('randomcolor')
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const Chance = require('chance')
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const chance = new Chance()
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const moment = require('moment')
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// core
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const config = require('./config')
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const logger = require('./logger')
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const history = require('./history')
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const models = require('./models')
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// ot
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const ot = require('./ot')
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// public
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const realtime = {
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io: null,
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onAuthorizeSuccess,
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onAuthorizeFail,
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secure,
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connection,
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getStatus,
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isReady,
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maintenance: true
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}
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function onAuthorizeSuccess (data, accept) {
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accept()
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}
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function onAuthorizeFail (data, message, error, accept) {
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accept() // accept whether authorize or not to allow anonymous usage
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}
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// secure the origin by the cookie
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function secure (socket, next) {
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try {
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const handshakeData = socket.request
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if (handshakeData.headers.cookie) {
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handshakeData.cookie = cookie.parse(handshakeData.headers.cookie)
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handshakeData.sessionID = cookieParser.signedCookie(handshakeData.cookie[config.sessionName], config.sessionSecret)
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if (handshakeData.sessionID &&
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handshakeData.cookie[config.sessionName] &&
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handshakeData.cookie[config.sessionName] !== handshakeData.sessionID) {
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logger.debug(`AUTH success cookie: ${handshakeData.sessionID}`)
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return next()
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} else {
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next(new Error('AUTH failed: Cookie is invalid.'))
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}
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} else {
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next(new Error('AUTH failed: No cookie transmitted.'))
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}
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} catch (ex) {
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next(new Error('AUTH failed:' + JSON.stringify(ex)))
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}
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}
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function emitCheck (note) {
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const out = {
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title: note.title,
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updatetime: note.updatetime,
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lastchangeuser: note.lastchangeuser,
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lastchangeuserprofile: note.lastchangeuserprofile,
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authors: note.authors,
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authorship: note.authorship
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}
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realtime.io.to(note.id).emit('check', out)
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}
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// actions
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const users = {}
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const notes = {}
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// update when the note is dirty
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setInterval(function () {
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async.each(Object.keys(notes), function (key, callback) {
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const note = notes[key]
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if (note.server.isDirty) {
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logger.debug(`updater found dirty note: ${key}`)
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note.server.isDirty = false
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updateNote(note, function (err, _note) {
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// handle when note already been clean up
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if (!notes[key] || !notes[key].server) return callback(null, null)
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if (!_note) {
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realtime.io.to(note.id).emit('info', {
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code: 404
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})
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logger.error('note not found: ', note.id)
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}
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if (err || !_note) {
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for (let i = 0, l = note.socks.length; i < l; i++) {
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const sock = note.socks[i]
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if (typeof sock !== 'undefined' && sock) {
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setTimeout(function () {
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sock.disconnect(true)
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}, 0)
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}
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}
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return callback(err, null)
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}
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note.updatetime = moment(_note.lastchangeAt).valueOf()
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emitCheck(note)
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return callback(null, null)
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})
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} else {
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return callback(null, null)
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}
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}, function (err) {
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if (err) return logger.error('updater error', err)
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})
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}, 1000)
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function updateNote (note, callback) {
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models.Note.findOne({
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where: {
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id: note.id
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}
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}).then(function (_note) {
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if (!_note) return callback(null, null)
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// update user note history
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const tempUsers = Object.assign({}, note.tempUsers)
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note.tempUsers = {}
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Object.keys(tempUsers).forEach(function (key) {
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updateHistory(key, note, tempUsers[key])
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})
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if (note.lastchangeuser) {
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if (_note.lastchangeuserId !== note.lastchangeuser) {
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models.User.findOne({
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where: {
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id: note.lastchangeuser
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}
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}).then(function (user) {
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if (!user) return callback(null, null)
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note.lastchangeuserprofile = models.User.getProfile(user)
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return finishUpdateNote(note, _note, callback)
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}).catch(function (err) {
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logger.error(err)
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return callback(err, null)
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})
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} else {
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return finishUpdateNote(note, _note, callback)
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}
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} else {
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note.lastchangeuserprofile = null
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return finishUpdateNote(note, _note, callback)
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}
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}).catch(function (err) {
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logger.error(err)
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return callback(err, null)
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})
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}
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function finishUpdateNote (note, _note, callback) {
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if (!note || !note.server) return callback(null, null)
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const body = note.server.document
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const title = note.title = models.Note.parseNoteTitle(body)
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const values = {
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title,
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content: body,
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authorship: note.authorship,
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lastchangeuserId: note.lastchangeuser,
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lastchangeAt: Date.now()
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}
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_note.update(values).then(function (_note) {
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saverSleep = false
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return callback(null, _note)
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}).catch(function (err) {
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logger.error(err)
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return callback(err, null)
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})
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}
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// clean when user not in any rooms or user not in connected list
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setInterval(function () {
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async.each(Object.keys(users), function (key, callback) {
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let socket = realtime.io.sockets.connected[key]
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if ((!socket && users[key]) ||
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(socket && (!socket.rooms || socket.rooms.length <= 0))) {
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logger.debug(`cleaner found redundant user: ${key}`)
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if (!socket) {
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socket = {
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id: key
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}
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}
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disconnectSocketQueue.push(socket)
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disconnect(socket)
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}
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return callback(null, null)
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}, function (err) {
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if (err) return logger.error('cleaner error', err)
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})
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}, 60000)
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let saverSleep = false
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// save note revision in interval
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setInterval(function () {
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if (saverSleep) return
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models.Revision.saveAllNotesRevision(function (err, notes) {
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if (err) return logger.error('revision saver failed: ' + err)
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if (notes && notes.length <= 0) {
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saverSleep = true
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}
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})
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}, 60000 * 5)
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function getStatus (callback) {
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models.Note.count().then(function (notecount) {
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const distinctaddresses = []
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const regaddresses = []
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const distinctregaddresses = []
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Object.keys(users).forEach(function (key) {
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const user = users[key]
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if (!user) return
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let found = false
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for (let i = 0; i < distinctaddresses.length; i++) {
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if (user.address === distinctaddresses[i]) {
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found = true
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break
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}
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}
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if (!found) {
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distinctaddresses.push(user.address)
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}
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if (user.login) {
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regaddresses.push(user.address)
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let found = false
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for (let i = 0; i < distinctregaddresses.length; i++) {
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if (user.address === distinctregaddresses[i]) {
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found = true
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break
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}
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}
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if (!found) {
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distinctregaddresses.push(user.address)
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}
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}
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})
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models.User.count().then(function (regcount) {
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return callback
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? callback({
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onlineNotes: Object.keys(notes).length,
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onlineUsers: Object.keys(users).length,
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distinctOnlineUsers: distinctaddresses.length,
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notesCount: notecount,
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registeredUsers: regcount,
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onlineRegisteredUsers: regaddresses.length,
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distinctOnlineRegisteredUsers: distinctregaddresses.length,
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isConnectionBusy,
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connectionSocketQueueLength: connectionSocketQueue.length,
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isDisconnectBusy,
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disconnectSocketQueueLength: disconnectSocketQueue.length
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})
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: null
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}).catch(function (err) {
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return logger.error('count user failed: ' + err)
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})
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}).catch(function (err) {
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return logger.error('count note failed: ' + err)
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})
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}
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function isReady () {
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return realtime.io &&
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Object.keys(notes).length === 0 && Object.keys(users).length === 0 &&
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connectionSocketQueue.length === 0 && !isConnectionBusy &&
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disconnectSocketQueue.length === 0 && !isDisconnectBusy
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}
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function extractNoteIdFromSocket (socket) {
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if (!socket || !socket.handshake) {
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return false
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}
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if (socket.handshake.query && socket.handshake.query.noteId) {
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return socket.handshake.query.noteId
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} else {
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return false
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}
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}
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function parseNoteIdFromSocket (socket, callback) {
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const noteId = extractNoteIdFromSocket(socket)
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if (!noteId) {
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return callback(null, null)
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}
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models.Note.parseNoteId(noteId, function (err, id) {
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if (err || !id) return callback(err, id)
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return callback(null, id)
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})
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}
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function emitOnlineUsers (socket) {
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const noteId = socket.noteId
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if (!noteId || !notes[noteId]) return
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const users = []
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Object.keys(notes[noteId].users).forEach(function (key) {
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const user = notes[noteId].users[key]
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if (user) { users.push(buildUserOutData(user)) }
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})
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const out = {
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users
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}
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realtime.io.to(noteId).emit('online users', out)
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}
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function emitUserStatus (socket) {
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const noteId = socket.noteId
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const user = users[socket.id]
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if (!noteId || !notes[noteId] || !user) return
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const out = buildUserOutData(user)
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socket.broadcast.to(noteId).emit('user status', out)
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}
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function emitRefresh (socket) {
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const noteId = socket.noteId
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if (!noteId || !notes[noteId]) return
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const note = notes[noteId]
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const out = {
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title: note.title,
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docmaxlength: config.documentMaxLength,
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owner: note.owner,
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ownerprofile: note.ownerprofile,
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lastchangeuser: note.lastchangeuser,
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lastchangeuserprofile: note.lastchangeuserprofile,
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authors: note.authors,
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authorship: note.authorship,
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permission: note.permission,
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createtime: note.createtime,
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updatetime: note.updatetime
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}
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socket.emit('refresh', out)
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}
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function isDuplicatedInSocketQueue (queue, socket) {
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for (let i = 0; i < queue.length; i++) {
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if (queue[i] && queue[i].id === socket.id) {
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return true
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}
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}
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return false
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}
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function clearSocketQueue (queue, socket) {
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for (let i = 0; i < queue.length; i++) {
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if (!queue[i] || queue[i].id === socket.id) {
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queue.splice(i, 1)
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i--
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}
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}
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}
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function connectNextSocket () {
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setTimeout(function () {
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isConnectionBusy = false
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if (connectionSocketQueue.length > 0) {
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startConnection(connectionSocketQueue[0])
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}
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}, 1)
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}
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function checkViewPermission (req, note) {
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if (note.permission === 'private') {
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if (req.user && req.user.logged_in && req.user.id === note.owner) { return true } else { return false }
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} else if (note.permission === 'limited' || note.permission === 'protected') {
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if (req.user && req.user.logged_in) { return true } else { return false }
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} else {
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return true
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}
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}
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let isConnectionBusy = false
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const connectionSocketQueue = []
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let isDisconnectBusy = false
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const disconnectSocketQueue = []
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function finishConnection (socket, noteId, socketId) {
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// check view permission
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if (!checkViewPermission(socket.request, notes[noteId])) {
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return failConnection(403, 'connection forbidden', socket)
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}
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const note = notes[noteId]
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const user = users[socketId]
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// update user color to author color
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if (note.authors[user.userid]) {
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user.color = users[socket.id].color = note.authors[user.userid].color
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}
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note.users[socket.id] = user
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note.socks.push(socket)
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note.server.addClient(socket)
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note.server.setName(socket, user.name)
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note.server.setColor(socket, user.color)
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// update user note history
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updateHistory(user.userid, note)
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emitOnlineUsers(socket)
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emitRefresh(socket)
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// clear finished socket in queue
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clearSocketQueue(connectionSocketQueue, socket)
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// seek for next socket
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connectNextSocket()
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if (config.debug) {
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const noteId = socket.noteId
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logger.debug(`SERVER connected a client to [${noteId}]:`)
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logger.debug(JSON.stringify(user))
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logger.debug(notes)
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getStatus(function (data) {
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logger.debug(JSON.stringify(data))
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})
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}
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}
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function startConnection (socket) {
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if (isConnectionBusy) return
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isConnectionBusy = true
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const noteId = socket.noteId
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if (!noteId) {
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return failConnection(404, 'note id not found', socket)
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}
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if (!notes[noteId]) {
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const include = [{
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model: models.User,
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as: 'owner'
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}, {
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model: models.User,
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as: 'lastchangeuser'
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}, {
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model: models.Author,
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as: 'authors',
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include: [{
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model: models.User,
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as: 'user'
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}]
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}]
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models.Note.findOne({
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where: {
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id: noteId
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},
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include
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}).then(function (note) {
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// if client disconnected while we waited for the note, disconnect() cleaned up users[socket.id]
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if (!users[socket.id]) {
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clearSocketQueue(connectionSocketQueue, socket)
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connectNextSocket()
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return
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}
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if (!note) {
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return failConnection(404, 'note not found', socket)
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}
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const owner = note.ownerId
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const ownerprofile = note.owner ? models.User.getProfile(note.owner) : null
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const lastchangeuser = note.lastchangeuserId
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const lastchangeuserprofile = note.lastchangeuser ? models.User.getProfile(note.lastchangeuser) : null
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const body = note.content
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const createtime = note.createdAt
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const updatetime = note.lastchangeAt
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const server = new ot.EditorSocketIOServer(body, [], noteId, ifMayEdit, operationCallback)
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const authors = {}
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for (let i = 0; i < note.authors.length; i++) {
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const author = note.authors[i]
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const profile = models.User.getProfile(author.user)
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if (profile) {
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authors[author.userId] = {
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userid: author.userId,
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color: author.color,
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photo: profile.photo,
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name: profile.name
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}
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}
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}
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notes[noteId] = {
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id: noteId,
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alias: note.alias,
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title: note.title,
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owner,
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ownerprofile,
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permission: note.permission,
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lastchangeuser,
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lastchangeuserprofile,
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socks: [],
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users: {},
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tempUsers: {},
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createtime: moment(createtime).valueOf(),
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updatetime: moment(updatetime).valueOf(),
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server,
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authors,
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authorship: note.authorship
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}
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return finishConnection(socket, noteId, socket.id)
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}).catch(function (err) {
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return failConnection(500, err, socket)
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})
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} else {
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return finishConnection(socket, noteId, socket.id)
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}
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}
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function failConnection (code, err, socket) {
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logger.error(err)
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// clear error socket in queue
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clearSocketQueue(connectionSocketQueue, socket)
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connectNextSocket()
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// emit error info
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socket.emit('info', {
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code
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})
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return socket.disconnect(true)
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}
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function disconnect (socket) {
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if (isDisconnectBusy) return
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isDisconnectBusy = true
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logger.debug('SERVER disconnected a client')
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logger.debug(JSON.stringify(users[socket.id]))
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if (users[socket.id]) {
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delete users[socket.id]
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}
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const noteId = socket.noteId
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const note = notes[noteId]
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if (note) {
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// delete user in users
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if (note.users[socket.id]) {
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delete note.users[socket.id]
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}
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// remove sockets in the note socks
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let index
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do {
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index = note.socks.indexOf(socket)
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if (index !== -1) {
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note.socks.splice(index, 1)
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}
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} while (index !== -1)
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// remove note in notes if no user inside
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if (Object.keys(note.users).length <= 0) {
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if (note.server.isDirty) {
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updateNote(note, function (err, _note) {
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if (err) return logger.error('disconnect note failed: ' + err)
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// clear server before delete to avoid memory leaks
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note.server.document = ''
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note.server.operations = []
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delete note.server
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delete notes[noteId]
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if (config.debug) {
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logger.debug(notes)
|
|
getStatus(function (data) {
|
|
logger.debug(JSON.stringify(data))
|
|
})
|
|
}
|
|
})
|
|
} else {
|
|
delete note.server
|
|
delete notes[noteId]
|
|
}
|
|
}
|
|
}
|
|
emitOnlineUsers(socket)
|
|
|
|
// clear finished socket in queue
|
|
clearSocketQueue(disconnectSocketQueue, socket)
|
|
// seek for next socket
|
|
isDisconnectBusy = false
|
|
if (disconnectSocketQueue.length > 0) { disconnect(disconnectSocketQueue[0]) }
|
|
|
|
if (config.debug) {
|
|
logger.debug(notes)
|
|
getStatus(function (data) {
|
|
logger.debug(JSON.stringify(data))
|
|
})
|
|
}
|
|
}
|
|
|
|
function buildUserOutData (user) {
|
|
const out = {
|
|
id: user.id,
|
|
login: user.login,
|
|
userid: user.userid,
|
|
photo: user.photo,
|
|
color: user.color,
|
|
cursor: user.cursor,
|
|
name: user.name,
|
|
idle: user.idle,
|
|
type: user.type
|
|
}
|
|
return out
|
|
}
|
|
|
|
function updateUserData (socket, user) {
|
|
// retrieve user data from passport
|
|
if (socket.request.user && socket.request.user.logged_in) {
|
|
const profile = models.User.getProfile(socket.request.user)
|
|
user.photo = profile.photo
|
|
user.name = profile.name
|
|
user.userid = socket.request.user.id
|
|
user.login = true
|
|
} else {
|
|
user.userid = null
|
|
user.name = 'Guest ' + chance.last()
|
|
user.login = false
|
|
}
|
|
}
|
|
|
|
function ifMayEdit (socket, callback) {
|
|
const noteId = socket.noteId
|
|
if (!noteId || !notes[noteId]) return
|
|
const note = notes[noteId]
|
|
let mayEdit = true
|
|
switch (note.permission) {
|
|
case 'freely':
|
|
// not blocking anyone
|
|
break
|
|
case 'editable': case 'limited':
|
|
// only login user can change
|
|
if (!socket.request.user || !socket.request.user.logged_in) { mayEdit = false }
|
|
break
|
|
case 'locked': case 'private': case 'protected':
|
|
// only owner can change
|
|
if (!note.owner || note.owner !== socket.request.user.id) { mayEdit = false }
|
|
break
|
|
}
|
|
// if user may edit and this is a text operation
|
|
if (socket.origin === 'operation' && mayEdit) {
|
|
// save for the last change user id
|
|
if (socket.request.user && socket.request.user.logged_in) {
|
|
note.lastchangeuser = socket.request.user.id
|
|
} else {
|
|
note.lastchangeuser = null
|
|
}
|
|
}
|
|
return callback(mayEdit)
|
|
}
|
|
|
|
function operationCallback (socket, operation) {
|
|
const noteId = socket.noteId
|
|
if (!noteId || !notes[noteId]) return
|
|
const note = notes[noteId]
|
|
let userId = null
|
|
// save authors
|
|
if (socket.request.user && socket.request.user.logged_in) {
|
|
const user = users[socket.id]
|
|
if (!user) return
|
|
userId = socket.request.user.id
|
|
if (!note.authors[userId]) {
|
|
models.Author.findOrCreate({
|
|
where: {
|
|
noteId,
|
|
userId
|
|
},
|
|
defaults: {
|
|
noteId,
|
|
userId,
|
|
color: user.color
|
|
}
|
|
}).spread(function (author, created) {
|
|
if (author) {
|
|
note.authors[author.userId] = {
|
|
userid: author.userId,
|
|
color: author.color,
|
|
photo: user.photo,
|
|
name: user.name
|
|
}
|
|
}
|
|
}).catch(function (err) {
|
|
return logger.error('operation callback failed: ' + err)
|
|
})
|
|
}
|
|
note.tempUsers[userId] = Date.now()
|
|
}
|
|
// save authorship - use timer here because it's an O(n) complexity algorithm
|
|
setImmediate(function () {
|
|
note.authorship = models.Note.updateAuthorshipByOperation(operation, userId, note.authorship)
|
|
})
|
|
}
|
|
|
|
function updateHistory (userId, note, time) {
|
|
const noteId = note.alias ? note.alias : models.Note.encodeNoteId(note.id)
|
|
if (note.server) history.updateHistory(userId, noteId, note.server.document, time)
|
|
}
|
|
|
|
function connection (socket) {
|
|
if (realtime.maintenance) return
|
|
parseNoteIdFromSocket(socket, function (err, noteId) {
|
|
if (err) {
|
|
return failConnection(500, err, socket)
|
|
}
|
|
if (!noteId) {
|
|
return failConnection(404, 'note id not found', socket)
|
|
}
|
|
|
|
if (isDuplicatedInSocketQueue(connectionSocketQueue, socket)) return
|
|
|
|
// store noteId in this socket session
|
|
socket.noteId = noteId
|
|
|
|
// initialize user data
|
|
// random color
|
|
let color = randomcolor()
|
|
// make sure color not duplicated or reach max random count
|
|
if (notes[noteId]) {
|
|
let randomcount = 0
|
|
const maxrandomcount = 10
|
|
let found = false
|
|
do {
|
|
Object.keys(notes[noteId].users).forEach(function (userId) {
|
|
if (notes[noteId].users[userId].color === color) {
|
|
found = true
|
|
}
|
|
})
|
|
if (found) {
|
|
color = randomcolor()
|
|
randomcount++
|
|
}
|
|
} while (found && randomcount < maxrandomcount)
|
|
}
|
|
// create user data
|
|
users[socket.id] = {
|
|
id: socket.id,
|
|
address: socket.handshake.headers['x-forwarded-for'] || socket.handshake.address,
|
|
'user-agent': socket.handshake.headers['user-agent'],
|
|
color,
|
|
cursor: null,
|
|
login: false,
|
|
userid: null,
|
|
name: null,
|
|
idle: false,
|
|
type: null
|
|
}
|
|
updateUserData(socket, users[socket.id])
|
|
|
|
// start connection
|
|
connectionSocketQueue.push(socket)
|
|
startConnection(socket)
|
|
})
|
|
|
|
// received client refresh request
|
|
socket.on('refresh', function () {
|
|
emitRefresh(socket)
|
|
})
|
|
|
|
// received user status
|
|
socket.on('user status', function (data) {
|
|
const noteId = socket.noteId
|
|
const user = users[socket.id]
|
|
if (!noteId || !notes[noteId] || !user) return
|
|
logger.debug(`SERVER received [${noteId}] user status from [${socket.id}]: ${JSON.stringify(data)}`)
|
|
if (data) {
|
|
user.idle = data.idle
|
|
user.type = data.type
|
|
}
|
|
emitUserStatus(socket)
|
|
})
|
|
|
|
// received note permission change request
|
|
socket.on('permission', function (permission) {
|
|
// need login to do more actions
|
|
if (socket.request.user && socket.request.user.logged_in) {
|
|
const noteId = socket.noteId
|
|
if (!noteId || !notes[noteId]) return
|
|
const note = notes[noteId]
|
|
// Only owner can change permission
|
|
if (note.owner && note.owner === socket.request.user.id) {
|
|
if (permission === 'freely' && !config.allowAnonymous && !config.allowAnonymousEdits) return
|
|
note.permission = permission
|
|
models.Note.update({
|
|
permission
|
|
}, {
|
|
where: {
|
|
id: noteId
|
|
}
|
|
}).then(function (count) {
|
|
if (!count) {
|
|
return
|
|
}
|
|
const out = {
|
|
permission
|
|
}
|
|
realtime.io.to(note.id).emit('permission', out)
|
|
for (let i = 0, l = note.socks.length; i < l; i++) {
|
|
const sock = note.socks[i]
|
|
if (typeof sock !== 'undefined' && sock) {
|
|
// check view permission
|
|
if (!checkViewPermission(sock.request, note)) {
|
|
sock.emit('info', {
|
|
code: 403
|
|
})
|
|
setTimeout(function () {
|
|
sock.disconnect(true)
|
|
}, 0)
|
|
}
|
|
}
|
|
}
|
|
}).catch(function (err) {
|
|
return logger.error('update note permission failed: ' + err)
|
|
})
|
|
}
|
|
}
|
|
})
|
|
|
|
// delete a note
|
|
socket.on('delete', function () {
|
|
// need login to do more actions
|
|
if (socket.request.user && socket.request.user.logged_in) {
|
|
const noteId = socket.noteId
|
|
if (!noteId || !notes[noteId]) return
|
|
const note = notes[noteId]
|
|
// Only owner can delete note
|
|
if (note.owner && note.owner === socket.request.user.id) {
|
|
models.Note.destroy({
|
|
where: {
|
|
id: noteId
|
|
}
|
|
}).then(function (count) {
|
|
if (!count) return
|
|
for (let i = 0, l = note.socks.length; i < l; i++) {
|
|
const sock = note.socks[i]
|
|
if (typeof sock !== 'undefined' && sock) {
|
|
sock.emit('delete')
|
|
setTimeout(function () {
|
|
sock.disconnect(true)
|
|
}, 0)
|
|
}
|
|
}
|
|
}).catch(function (err) {
|
|
return logger.error('delete note failed: ' + err)
|
|
})
|
|
}
|
|
}
|
|
})
|
|
|
|
// reveiced when user logout or changed
|
|
socket.on('user changed', function () {
|
|
logger.info('user changed')
|
|
const noteId = socket.noteId
|
|
if (!noteId || !notes[noteId]) return
|
|
const user = notes[noteId].users[socket.id]
|
|
if (!user) return
|
|
updateUserData(socket, user)
|
|
emitOnlineUsers(socket)
|
|
})
|
|
|
|
// received sync of online users request
|
|
socket.on('online users', function () {
|
|
const noteId = socket.noteId
|
|
if (!noteId || !notes[noteId]) return
|
|
const users = []
|
|
Object.keys(notes[noteId].users).forEach(function (key) {
|
|
const user = notes[noteId].users[key]
|
|
if (user) { users.push(buildUserOutData(user)) }
|
|
})
|
|
const out = {
|
|
users
|
|
}
|
|
socket.emit('online users', out)
|
|
})
|
|
|
|
// check version
|
|
socket.on('version', function () {
|
|
socket.emit('version', {
|
|
version: config.fullversion,
|
|
minimumCompatibleVersion: config.minimumCompatibleVersion
|
|
})
|
|
})
|
|
|
|
// received cursor focus
|
|
socket.on('cursor focus', function (data) {
|
|
const noteId = socket.noteId
|
|
const user = users[socket.id]
|
|
if (!noteId || !notes[noteId] || !user) return
|
|
user.cursor = data
|
|
const out = buildUserOutData(user)
|
|
socket.broadcast.to(noteId).emit('cursor focus', out)
|
|
})
|
|
|
|
// received cursor activity
|
|
socket.on('cursor activity', function (data) {
|
|
const noteId = socket.noteId
|
|
const user = users[socket.id]
|
|
if (!noteId || !notes[noteId] || !user) return
|
|
user.cursor = data
|
|
const out = buildUserOutData(user)
|
|
socket.broadcast.to(noteId).emit('cursor activity', out)
|
|
})
|
|
|
|
// received cursor blur
|
|
socket.on('cursor blur', function () {
|
|
const noteId = socket.noteId
|
|
const user = users[socket.id]
|
|
if (!noteId || !notes[noteId] || !user) return
|
|
user.cursor = null
|
|
const out = {
|
|
id: socket.id
|
|
}
|
|
socket.broadcast.to(noteId).emit('cursor blur', out)
|
|
})
|
|
|
|
// when a new client disconnect
|
|
socket.on('disconnect', function () {
|
|
if (isDuplicatedInSocketQueue(socket, disconnectSocketQueue)) return
|
|
disconnectSocketQueue.push(socket)
|
|
disconnect(socket)
|
|
})
|
|
}
|
|
|
|
module.exports = realtime
|