908 lines
30 KiB
JavaScript
908 lines
30 KiB
JavaScript
//realtime
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//external modules
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var cookie = require('cookie');
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var cookieParser = require('cookie-parser');
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var url = require('url');
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var async = require('async');
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var LZString = require('lz-string');
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var randomcolor = require("randomcolor");
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var Chance = require('chance'),
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chance = new Chance();
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var moment = require('moment');
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//core
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var config = require("./config.js");
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var logger = require("./logger.js");
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var history = require("./history.js");
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var models = require("./models");
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//ot
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var ot = require("./ot/index.js");
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//public
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var realtime = {
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io: null,
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onAuthorizeSuccess: onAuthorizeSuccess,
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onAuthorizeFail: onAuthorizeFail,
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secure: secure,
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connection: connection,
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getStatus: getStatus,
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isReady: isReady
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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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var 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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if (config.debug)
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logger.info("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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var 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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out = LZString.compressToUTF16(JSON.stringify(out));
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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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var users = {};
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var notes = {};
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//update when the note is dirty
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var updater = setInterval(function () {
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async.each(Object.keys(notes), function (key, callback) {
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var note = notes[key];
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if (note.server.isDirty) {
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if (config.debug) logger.info("updater found dirty note: " + key);
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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 (var i = 0, l = note.socks.length; i < l; i++) {
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var 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.server.isDirty = false;
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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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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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var body = note.server.document;
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var title = note.title = models.Note.parseNoteTitle(body);
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title = LZString.compressToBase64(title);
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body = LZString.compressToBase64(body);
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var values = {
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title: title,
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content: body,
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authorship: LZString.compressToBase64(JSON.stringify(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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var cleaner = setInterval(function () {
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async.each(Object.keys(users), function (key, callback) {
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var 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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if (config.debug)
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logger.info("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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var saverSleep = false;
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// save note revision in interval
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var saver = 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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return;
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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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var distinctaddresses = [];
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var regaddresses = [];
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var distinctregaddresses = [];
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Object.keys(users).forEach(function (key) {
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var user = users[key];
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var found = false;
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for (var 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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var found = false;
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for (var 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 ? 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: isConnectionBusy,
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connectionSocketQueueLength: connectionSocketQueue.length,
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isDisconnectBusy: isDisconnectBusy,
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disconnectSocketQueueLength: disconnectSocketQueue.length
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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 || !socket.handshake.headers) {
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return false;
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}
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var referer = socket.handshake.headers.referer;
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if (!referer) {
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return false;
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}
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var hostUrl = url.parse(referer);
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var noteId = config.urlpath ? hostUrl.pathname.slice(config.urlpath.length + 1, hostUrl.pathname.length).split('/')[1] : hostUrl.pathname.split('/')[1];
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return noteId;
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}
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function parseNoteIdFromSocket(socket, callback) {
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var 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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var noteId = socket.noteId;
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if (!noteId || !notes[noteId]) return;
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var users = [];
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Object.keys(notes[noteId].users).forEach(function (key) {
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var user = notes[noteId].users[key];
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if (user)
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users.push(buildUserOutData(user));
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});
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var out = {
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users: users
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};
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out = LZString.compressToUTF16(JSON.stringify(out));
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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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var noteId = socket.noteId;
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if (!noteId || !notes[noteId]) return;
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var out = buildUserOutData(users[socket.id]);
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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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var noteId = socket.noteId;
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if (!noteId || !notes[noteId]) return;
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var note = notes[noteId];
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var 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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out = LZString.compressToUTF16(JSON.stringify(out));
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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 (var 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 (var 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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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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function interruptConnection(socket, note, user) {
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if (note) delete note;
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if (user) delete user;
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if (socket)
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clearSocketQueue(connectionSocketQueue, socket);
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else
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connectionSocketQueue.shift();
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connectNextSocket();
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}
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var isConnectionBusy = false;
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var connectionSocketQueue = [];
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var isDisconnectBusy = false;
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var disconnectSocketQueue = [];
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function finishConnection(socket, note, user) {
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// if no valid info provided will drop the client
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if (!socket || !note || !user) {
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return interruptConnection(socket, note, user);
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}
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//check view permission
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if (note.permission == 'private') {
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if (socket.request.user && socket.request.user.logged_in && socket.request.user.id == note.owner) {
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//na
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} else {
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interruptConnection(socket, note, user);
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return failConnection(403, 'connection forbidden', socket);
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}
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}
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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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setTimeout(function () {
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var noteId = note.alias ? note.alias : LZString.compressToBase64(note.id);
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if (note.server) history.updateHistory(user.userid, noteId, note.server.document);
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}, 0);
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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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var noteId = socket.noteId;
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logger.info('SERVER connected a client to [' + noteId + ']:');
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logger.info(JSON.stringify(user));
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//logger.info(notes);
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getStatus(function (data) {
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logger.info(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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var 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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var 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: include
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}).then(function (note) {
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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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var owner = note.ownerId;
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var ownerprofile = note.owner ? models.User.getProfile(note.owner) : null;
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var lastchangeuser = note.lastchangeuserId;
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var lastchangeuserprofile = note.lastchangeuser ? models.User.getProfile(note.lastchangeuser) : null;
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var body = LZString.decompressFromBase64(note.content);
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var createtime = note.createdAt;
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var updatetime = note.lastchangeAt;
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var server = new ot.EditorSocketIOServer(body, [], noteId, ifMayEdit, operationCallback);
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var authors = {};
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for (var i = 0; i < note.authors.length; i++) {
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var author = note.authors[i];
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var profile = models.User.getProfile(author.user);
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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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notes[noteId] = {
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id: noteId,
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alias: note.alias,
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title: LZString.decompressFromBase64(note.title),
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owner: owner,
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ownerprofile: ownerprofile,
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permission: note.permission,
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lastchangeuser: lastchangeuser,
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lastchangeuserprofile: lastchangeuserprofile,
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socks: [],
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users: {},
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createtime: moment(createtime).valueOf(),
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updatetime: moment(updatetime).valueOf(),
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server: server,
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authors: authors,
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authorship: note.authorship ? JSON.parse(LZString.decompressFromBase64(note.authorship)) : []
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};
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return finishConnection(socket, notes[noteId], users[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, notes[noteId], users[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: 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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if (config.debug) {
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logger.info("SERVER disconnected a client");
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logger.info(JSON.stringify(users[socket.id]));
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}
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if (users[socket.id]) {
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delete users[socket.id];
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}
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var noteId = socket.noteId;
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var note = notes[noteId];
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if (note) {
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// delete user in users
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delete note.users[socket.id];
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// remove sockets in the note socks
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do {
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var 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);
|
|
// remove note in notes if no user inside
|
|
if (Object.keys(note.users).length <= 0) {
|
|
if (note.server.isDirty) {
|
|
updateNote(note, function (err, _note) {
|
|
if (err) return logger.error('disconnect note failed: ' + err);
|
|
// clear server before delete to avoid memory leaks
|
|
note.server.document = "";
|
|
note.server.operations = [];
|
|
delete note.server;
|
|
delete notes[noteId];
|
|
if (config.debug) {
|
|
//logger.info(notes);
|
|
getStatus(function (data) {
|
|
logger.info(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.info(notes);
|
|
getStatus(function (data) {
|
|
logger.info(JSON.stringify(data));
|
|
});
|
|
}
|
|
}
|
|
|
|
function buildUserOutData(user) {
|
|
var 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) {
|
|
var 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) {
|
|
var noteId = socket.noteId;
|
|
if (!noteId || !notes[noteId]) return;
|
|
var note = notes[noteId];
|
|
var mayEdit = true;
|
|
switch (note.permission) {
|
|
case "freely":
|
|
//not blocking anyone
|
|
break;
|
|
case "editable":
|
|
//only login user can change
|
|
if (!socket.request.user || !socket.request.user.logged_in)
|
|
mayEdit = false;
|
|
break;
|
|
case "locked": case "private":
|
|
//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) {
|
|
var noteId = socket.noteId;
|
|
if (!noteId || !notes[noteId]) return;
|
|
var note = notes[noteId];
|
|
var userId = null;
|
|
// save authors
|
|
if (socket.request.user && socket.request.user.logged_in) {
|
|
var socketId = socket.id;
|
|
var user = users[socketId];
|
|
userId = socket.request.user.id;
|
|
if (!note.authors[userId]) {
|
|
models.Author.create({
|
|
noteId: noteId,
|
|
userId: userId,
|
|
color: users[socketId].color
|
|
}).then(function (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);
|
|
});
|
|
}
|
|
// update user note history
|
|
setTimeout(function() {
|
|
var noteId = note.alias ? note.alias : LZString.compressToBase64(note.id);
|
|
if (note.server) history.updateHistory(userId, noteId, note.server.document);
|
|
}, 0);
|
|
|
|
}
|
|
// save authorship
|
|
note.authorship = models.Note.updateAuthorshipByOperation(operation, userId, note.authorship);
|
|
}
|
|
|
|
function connection(socket) {
|
|
if (config.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(socket, connectionSocketQueue)) return;
|
|
|
|
// store noteId in this socket session
|
|
socket.noteId = noteId;
|
|
|
|
//initialize user data
|
|
//random color
|
|
var color = randomcolor();
|
|
//make sure color not duplicated or reach max random count
|
|
if (notes[noteId]) {
|
|
var randomcount = 0;
|
|
var maxrandomcount = 10;
|
|
var found = false;
|
|
do {
|
|
Object.keys(notes[noteId].users).forEach(function (user) {
|
|
if (user.color == color) {
|
|
found = true;
|
|
return;
|
|
}
|
|
});
|
|
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: 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) {
|
|
var noteId = socket.noteId;
|
|
if (!noteId || !notes[noteId]) return;
|
|
if (config.debug)
|
|
logger.info('SERVER received [' + noteId + '] user status from [' + socket.id + ']: ' + JSON.stringify(data));
|
|
if (data) {
|
|
var user = users[socket.id];
|
|
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) {
|
|
var noteId = socket.noteId;
|
|
if (!noteId || !notes[noteId]) return;
|
|
var note = notes[noteId];
|
|
//Only owner can change permission
|
|
if (note.owner && note.owner == socket.request.user.id) {
|
|
note.permission = permission;
|
|
models.Note.update({
|
|
permission: permission
|
|
}, {
|
|
where: {
|
|
id: noteId
|
|
}
|
|
}).then(function (count) {
|
|
if (!count) {
|
|
return;
|
|
}
|
|
var out = {
|
|
permission: permission
|
|
};
|
|
realtime.io.to(note.id).emit('permission', out);
|
|
for (var i = 0, l = note.socks.length; i < l; i++) {
|
|
var sock = note.socks[i];
|
|
if (typeof sock !== 'undefined' && sock) {
|
|
//check view permission
|
|
if (permission == 'private') {
|
|
if (sock.request.user && sock.request.user.logged_in && sock.request.user.id == note.owner) {
|
|
//na
|
|
} else {
|
|
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) {
|
|
var noteId = socket.noteId;
|
|
if (!noteId || !notes[noteId]) return;
|
|
var 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 (var i = 0, l = note.socks.length; i < l; i++) {
|
|
var 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');
|
|
var noteId = socket.noteId;
|
|
if (!noteId || !notes[noteId]) return;
|
|
updateUserData(socket, notes[noteId].users[socket.id]);
|
|
emitOnlineUsers(socket);
|
|
});
|
|
|
|
//received sync of online users request
|
|
socket.on('online users', function () {
|
|
var noteId = socket.noteId;
|
|
if (!noteId || !notes[noteId]) return;
|
|
var users = [];
|
|
Object.keys(notes[noteId].users).forEach(function (key) {
|
|
var user = notes[noteId].users[key];
|
|
if (user)
|
|
users.push(buildUserOutData(user));
|
|
});
|
|
var out = {
|
|
users: users
|
|
};
|
|
out = LZString.compressToUTF16(JSON.stringify(out));
|
|
socket.emit('online users', out);
|
|
});
|
|
|
|
//check version
|
|
socket.on('version', function () {
|
|
socket.emit('version', {
|
|
version: config.version,
|
|
minimumCompatibleVersion: config.minimumCompatibleVersion
|
|
});
|
|
});
|
|
|
|
//received cursor focus
|
|
socket.on('cursor focus', function (data) {
|
|
var noteId = socket.noteId;
|
|
if (!noteId || !notes[noteId]) return;
|
|
users[socket.id].cursor = data;
|
|
var out = buildUserOutData(users[socket.id]);
|
|
socket.broadcast.to(noteId).emit('cursor focus', out);
|
|
});
|
|
|
|
//received cursor activity
|
|
socket.on('cursor activity', function (data) {
|
|
var noteId = socket.noteId;
|
|
if (!noteId || !notes[noteId]) return;
|
|
users[socket.id].cursor = data;
|
|
var out = buildUserOutData(users[socket.id]);
|
|
socket.broadcast.to(noteId).emit('cursor activity', out);
|
|
});
|
|
|
|
//received cursor blur
|
|
socket.on('cursor blur', function () {
|
|
var noteId = socket.noteId;
|
|
if (!noteId || !notes[noteId]) return;
|
|
users[socket.id].cursor = null;
|
|
var 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; |