mirror of https://github.com/jech/galene.git
917 lines
24 KiB
JavaScript
917 lines
24 KiB
JavaScript
// Copyright (c) 2020 by Juliusz Chroboczek.
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// This is not open source software. Copy it, and I'll break into your
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// house and tell your three year-old that Santa doesn't exist.
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'use strict';
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let myid;
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let group;
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let socket;
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let up = {}, down = {};
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let iceServers = [];
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let permissions = {};
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function toHex(array) {
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let a = new Uint8Array(array);
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let s = '';
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function hex(x) {
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let h = x.toString(16);
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if(h.length < 2)
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h = '0' + h;
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return h;
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}
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return a.reduce((x, y) => x + hex(y), '');
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}
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function randomid() {
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let a = new Uint8Array(16);
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crypto.getRandomValues(a);
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return toHex(a);
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}
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function Connection(id, pc) {
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this.id = id;
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this.label = null;
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this.pc = pc;
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this.stream = null;
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this.iceCandidates = [];
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}
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Connection.prototype.close = function() {
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this.pc.close();
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send({
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type: 'close',
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id: this.id,
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});
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}
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function setUserPass(username, password) {
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window.sessionStorage.setItem(
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'userpass',
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JSON.stringify({username: username, password: password}),
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);
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}
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function getUserPass() {
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let userpass = window.sessionStorage.getItem('userpass');
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if(!userpass)
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return null;
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return JSON.parse(userpass);
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}
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function getUsername() {
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let userpass = getUserPass();
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if(!userpass)
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return null;
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return userpass.username;
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}
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function setConnected(connected) {
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let statspan = document.getElementById('statspan');
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let userform = document.getElementById('userform');
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let diconnect = document.getElementById('disconnectbutton');
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if(connected) {
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statspan.textContent = 'Connected';
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statspan.classList.remove('disconnected');
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statspan.classList.add('connected');
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userform.classList.add('userform-invisible');
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userform.classList.remove('userform');
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disconnectbutton.classList.remove('disconnect-invisible');
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displayUsername();
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} else {
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let userpass = getUserPass();
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document.getElementById('username').value =
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userpass ? userpass.username : '';
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document.getElementById('password').value =
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userpass ? userpass.password : '';
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statspan.textContent = 'Disconnected';
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statspan.classList.remove('connected');
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statspan.classList.add('disconnected');
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userform.classList.add('userform');
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userform.classList.remove('userform-invisible');
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disconnectbutton.classList.add('disconnect-invisible');
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permissions={};
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clearUsername(false);
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}
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}
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document.getElementById('presenterbox').onchange = function(e) {
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e.preventDefault();
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setLocalMedia();
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}
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document.getElementById('sharebox').onchange = function(e) {
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e.preventDefault();
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setShareMedia();
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}
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let localMediaId = null;
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async function setLocalMedia() {
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if(!getUserPass())
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return;
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if(!document.getElementById('presenterbox').checked) {
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if(localMediaId) {
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up[localMediaId].close();
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delete(up[localMediaId]);
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delMedia(localMediaId)
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localMediaId = null;
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}
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return;
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}
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if(!localMediaId) {
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let constraints = {audio: true, video: true};
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let opts = {video: true, audio: true};
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let stream = null;
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try {
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stream = await navigator.mediaDevices.getUserMedia(constraints);
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} catch(e) {
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console.error(e);
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return;
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}
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localMediaId = await newUpStream();
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let c = up[localMediaId];
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c.stream = stream;
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stream.getTracks().forEach(t => {
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c.pc.addTrack(t, stream);
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});
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await setMedia(localMediaId);
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}
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}
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let shareMediaId = null;
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async function setShareMedia() {
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if(!getUserPass())
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return;
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if(!document.getElementById('sharebox').checked) {
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if(shareMediaId) {
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up[shareMediaId].close();
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delete(up[shareMediaId]);
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delMedia(shareMediaId)
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shareMediaId = null;
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}
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return;
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}
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if(!shareMediaId) {
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let constraints = {audio: true, video: true};
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let opts = {video: true, audio: true};
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let stream = null;
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try {
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stream = await navigator.mediaDevices.getDisplayMedia({});
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} catch(e) {
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console.error(e);
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return;
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}
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shareMediaId = await newUpStream();
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let c = up[shareMediaId];
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c.stream = stream;
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stream.getTracks().forEach(t => {
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c.pc.addTrack(t, stream);
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t.onended = e => {
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document.getElementById('sharebox').checked = false;
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setShareMedia();
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}
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});
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await setMedia(shareMediaId);
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}
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}
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function setMedia(id) {
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let mine = true;
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let c = up[id];
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if(!c) {
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c = down[id];
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mine = false;
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}
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if(!c)
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throw new Error('Unknown connection');
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let peersdiv = document.getElementById('peers');
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let div = document.getElementById('peer-' + id);
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if(!div) {
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div = document.createElement('div');
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div.id = 'peer-' + id;
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div.classList.add('peer');
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peersdiv.appendChild(div);
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}
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let media = document.getElementById('media-' + id);
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if(!media) {
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media = document.createElement('video');
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media.id = 'media-' + id;
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media.classList.add('media');
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media.autoplay = true;
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media.playsinline = true;
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media.controls = true;
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if(mine)
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media.muted = true;
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div.appendChild(media);
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}
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let label = document.getElementById('label-' + id);
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if(!label) {
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label = document.createElement('div');
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label.id = 'label-' + id;
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label.classList.add('label');
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div.appendChild(label)
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}
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media.srcObject = c.stream;
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setLabel(id);
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}
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function delMedia(id) {
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let mediadiv = document.getElementById('peers');
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let peer = document.getElementById('peer-' + id);
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let media = document.getElementById('media-' + id);
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media.srcObject = null;
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mediadiv.removeChild(peer);
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}
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function setLabel(id, fallback) {
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let label = document.getElementById('label-' + id);
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if(!label)
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return;
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let l = down[id] ? down[id].label : null;
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if(l) {
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label.textContent = l;
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label.classList.remove('label-fallback');
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} else if(fallback) {
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label.textContent = fallback;
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label.classList.add('label-fallback');
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} else {
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label.textContent = '';
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label.classList.remove('label-fallback');
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}
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}
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function serverConnect() {
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if(socket) {
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socket.close(1000, 'Reconnecting');
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socket = null;
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setConnected(false);
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}
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try {
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socket = new WebSocket(
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`ws${location.protocol === 'https:' ? 's' : ''}://${location.host}/ws`,
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);
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} catch(e) {
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console.error(e);
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setConnected(false);
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return Promise.reject(e);
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}
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return new Promise((resolve, reject) => {
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socket.onerror = function(e) {
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console.error(e);
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reject(e.error ? e.error : e);
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};
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socket.onopen = function(e) {
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resetUsers();
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resetChat();
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setConnected(true);
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let up = getUserPass();
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send({
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type: 'handshake',
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id: myid,
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group: group,
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username: up.username,
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password: up.password,
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});
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resolve();
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};
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socket.onclose = function(e) {
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setConnected(false);
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document.getElementById('presenterbox').checked = false;
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document.getElementById('presenterbox').disabled = true;
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setLocalMedia();
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document.getElementById('sharebox').checked = false;
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document.getElementById('sharebox').disabled = true;
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setShareMedia();
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reject(new Error('websocket close ' + e.code + ' ' + e.reason));
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};
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socket.onmessage = function(e) {
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let m = JSON.parse(e.data);
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switch(m.type) {
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case 'offer':
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gotOffer(m.id, m.offer);
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break;
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case 'answer':
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gotAnswer(m.id, m.answer);
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break;
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case 'close':
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gotClose(m.id);
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break;
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case 'abort':
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gotAbort(m.id);
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break;
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case 'ice':
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gotICE(m.id, m.candidate);
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break;
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case 'maxbitrate':
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setMaxBitrate(m.id, m.audiorate, m.videorate);
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break;
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case 'label':
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gotLabel(m.id, m.value);
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break;
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case 'permissions':
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gotPermissions(m.permissions);
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break;
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case 'user':
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gotUser(m.id, m.username, m.del);
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break;
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case 'chat':
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addToChatbox(m.id, m.username, m.value, m.me);
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break;
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case 'error':
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displayError(m.value);
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break;
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default:
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console.warn('Unexpected server message', m.type);
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return;
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}
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};
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});
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}
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async function gotOffer(id, offer) {
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let c = down[id];
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if(!c) {
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let pc = new RTCPeerConnection({
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iceServers: iceServers,
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});
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c = new Connection(id, pc);
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down[id] = c;
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c.pc.onicecandidate = function(e) {
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if(!e.candidate)
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return;
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send({type: 'ice',
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id: id,
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candidate: e.candidate,
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});
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}
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c.pc.ontrack = function(e) {
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c.stream = e.streams[0];
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setMedia(id);
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}
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}
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await c.pc.setRemoteDescription(offer);
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await addIceCandidates(c);
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let answer = await c.pc.createAnswer();
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if(!answer)
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throw new Error("Didn't create answer")
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await c.pc.setLocalDescription(answer);
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send({
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type: 'answer',
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id: id,
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answer: answer,
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});
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}
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function gotLabel(id, label) {
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let c = down[id];
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if(!c)
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throw new Error('Got label for unknown id');
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c.label = label;
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setLabel(id);
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}
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async function gotAnswer(id, answer) {
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let c = up[id];
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if(!c)
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throw new Error('unknown up stream');
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await c.pc.setRemoteDescription(answer);
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await addIceCandidates(c);
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}
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function gotClose(id) {
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let c = down[id];
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if(!c)
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throw new Error('unknown down stream');
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delete(down[id]);
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c.close();
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delMedia(id);
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}
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function gotAbort(id) {
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let c = up[id];
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if(!c)
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throw new Error('unknown up stream in abort');
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if(id === localMediaId) {
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document.getElementById('presenterbox').checked = false;
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setLocalMedia();
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} else if(id === shareMediaId) {
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document.getElementById('sharebox').checked = false;
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setShareMedia();
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} else {
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console.error('Strange stream in abort');
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delMedia(id);
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c.pc.close();
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delete(up[id]);
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}
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}
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async function gotICE(id, candidate) {
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let conn = up[id];
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if(!conn)
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conn = down[id];
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if(!conn)
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throw new Error('unknown stream');
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if(conn.pc.remoteDescription)
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await conn.pc.addIceCandidate(candidate).catch(console.warn);
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else
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conn.iceCandidates.push(candidate)
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}
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let maxaudiorate, maxvideorate;
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async function setMaxBitrate(id, audio, video) {
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let conn = up[id];
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if(!conn)
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throw new Error("Setting bitrate of unknown id");
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let senders = conn.pc.getSenders();
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for(let i = 0; i < senders.length; i++) {
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let s = senders[i];
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if(!s.track)
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return;
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let p = s.getParameters();
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let bitrate;
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if(s.track.kind == 'audio')
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bitrate = audio;
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else if(s.track.kind == 'video')
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bitrate = video;
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for(let j = 0; j < p.encodings.length; j++) {
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let e = p.encodings[j];
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if(bitrate)
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e.maxBitrate = bitrate;
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else
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delete(e.maxBitrate);
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await s.setParameters(p);
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}
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}
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if((audio && audio < 128000) || (video && video < 256000)) {
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let l = '';
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if(audio)
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l = `${Math.round(audio/1000)}kbps`
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if(video) {
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if(l)
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l = l + ' + ';
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l = l + `${Math.round(video/1000)}kbps`
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}
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setLabel(id, l)
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} else {
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setLabel(id);
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}
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}
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async function addIceCandidates(conn) {
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let promises = []
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conn.iceCandidates.forEach(c => {
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promises.push(conn.pc.addIceCandidate(c).catch(console.warn));
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});
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conn.iceCandidates = [];
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return await Promise.all(promises);
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}
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function send(m) {
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if(!m)
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throw(new Error('Sending null message'));
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return socket.send(JSON.stringify(m))
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}
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let users = {};
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function addUser(id, name) {
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if(!name)
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name = null;
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if(id in users)
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throw new Error('Duplicate user id');
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users[id] = name;
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let div = document.getElementById('users');
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let anon = document.getElementById('anonymous-users');
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let user = document.createElement('div');
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user.id = 'user-' + id;
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user.textContent = name ? name : '(anon)';
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div.appendChild(user);
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}
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function delUser(id, name) {
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if(!name)
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name = null;
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if(!id in users)
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throw new Error('Unknown user id');
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if(users[id] !== name)
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throw new Error('Inconsistent user name');
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delete(users[id]);
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let div = document.getElementById('users');
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let user = document.getElementById('user-' + id);
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div.removeChild(user);
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}
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function resetUsers() {
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for(let id in users)
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delUser(id, users[id]);
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}
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function gotUser(id, name, del) {
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if(del)
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delUser(id, name);
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else
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addUser(id, name);
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}
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function displayUsername() {
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let userpass = getUserPass();
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let text = '';
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if(userpass && userpass.username)
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text = 'as ' + userpass.username;
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if(permissions.op && permissions.present)
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text = text + ' (op, presenter)';
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else if(permissions.op)
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text = text + ' (op)';
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else if(permissions.present)
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text = text + ' (presenter)';
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document.getElementById('userspan').textContent = text;
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}
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|
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function clearUsername() {
|
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document.getElementById('userspan').textContent = '';
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}
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function gotPermissions(perm) {
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permissions = perm;
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document.getElementById('presenterbox').disabled = !perm.present;
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document.getElementById('sharebox').disabled = !perm.present;
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displayUsername();
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}
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|
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const urlRegexp = /https?:\/\/[-a-zA-Z0-9@:%/._\+~#=?]+[-a-zA-Z0-9@:%/_\+~#=]/g;
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|
|
function formatLine(line) {
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|
let r = new RegExp(urlRegexp);
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|
let result = [];
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let pos = 0;
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while(true) {
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let m = r.exec(line);
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if(!m)
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break;
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result.push(document.createTextNode(line.slice(pos, m.index)));
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let a = document.createElement('a');
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a.href = m[0];
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a.textContent = m[0];
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a.target = '_blank';
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a.rel = 'noreferrer noopener';
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result.push(a);
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pos = m.index + m[0].length;
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|
}
|
|
result.push(document.createTextNode(line.slice(pos)));
|
|
return result;
|
|
}
|
|
|
|
function formatLines(lines) {
|
|
let elts = [];
|
|
if(lines.length > 0)
|
|
elts = formatLine(lines[0]);
|
|
for(let i = 1; i < lines.length; i++) {
|
|
elts.push(document.createElement('br'));
|
|
elts = elts.concat(formatLine(lines[i]));
|
|
}
|
|
let elt = document.createElement('p');
|
|
elts.forEach(e => elt.appendChild(e));
|
|
return elt;
|
|
}
|
|
|
|
let lastMessage = {};
|
|
|
|
function addToChatbox(peerId, nick, message, me){
|
|
let container = document.createElement('div');
|
|
container.classList.add('message');
|
|
if(!me) {
|
|
let p = formatLines(message.split('\n'));
|
|
if (lastMessage.nick !== nick || lastMessage.peerId !== peerId) {
|
|
let user = document.createElement('p');
|
|
user.textContent = nick;
|
|
user.classList.add('message-user');
|
|
container.appendChild(user);
|
|
}
|
|
p.classList.add('message-content');
|
|
container.appendChild(p);
|
|
lastMessage.nick = nick;
|
|
lastMessage.peerId = peerId;
|
|
} else {
|
|
let asterisk = document.createElement('span');
|
|
asterisk.textContent = '*';
|
|
asterisk.classList.add('message-me-asterisk');
|
|
let user = document.createElement('span');
|
|
user.textContent = nick;
|
|
user.classList.add('message-me-user');
|
|
let content = document.createElement('span');
|
|
formatLine(message).forEach(elt => {
|
|
content.appendChild(elt);
|
|
});
|
|
content.classList.add('message-me-content');
|
|
container.appendChild(asterisk);
|
|
container.appendChild(user);
|
|
container.appendChild(content);
|
|
container.classList.add('message-me');
|
|
delete(lastMessage.nick);
|
|
delete(lastMessage.peerId);
|
|
}
|
|
|
|
document.getElementById('box').appendChild(container);
|
|
|
|
if(box.scrollHeight > box.clientHeight) {
|
|
box.scrollTop = box.scrollHeight - box.clientHeight;
|
|
}
|
|
|
|
return message;
|
|
}
|
|
|
|
function resetChat() {
|
|
lastMessage = {};
|
|
document.getElementById('box').textContent = '';
|
|
}
|
|
|
|
function handleInput() {
|
|
let username = getUsername();
|
|
let input = document.getElementById('input');
|
|
let data = input.value;
|
|
input.value = '';
|
|
|
|
let message, me;
|
|
|
|
if(data === '')
|
|
return;
|
|
|
|
if(data.charAt(0) === '/') {
|
|
if(data.charAt(1) === '/') {
|
|
message = data.substring(1);
|
|
me = false;
|
|
} else {
|
|
let space, cmd, rest;
|
|
space = data.indexOf(' ');
|
|
if(space < 0) {
|
|
cmd = data;
|
|
rest = '';
|
|
} else {
|
|
cmd = data.slice(0, space);
|
|
rest = data.slice(space + 1).trim();
|
|
}
|
|
|
|
switch(cmd) {
|
|
case '/me':
|
|
message = rest;
|
|
me = true;
|
|
break;
|
|
case '/leave':
|
|
socket.close();
|
|
return;
|
|
case '/op':
|
|
case '/unop':
|
|
case '/kick':
|
|
case '/present':
|
|
case '/unpresent':
|
|
if(!permissions.op) {
|
|
displayError("You're not an operator");
|
|
return;
|
|
}
|
|
let id;
|
|
if(id in users) {
|
|
id = rest;
|
|
} else {
|
|
for(let i in users) {
|
|
if(users[i] === rest) {
|
|
id = i;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
if(!id) {
|
|
displayError('Unknown user ' + rest);
|
|
return;
|
|
}
|
|
send({
|
|
type: cmd.slice(1),
|
|
id: id,
|
|
});
|
|
return;
|
|
default:
|
|
displayError('Uknown command ' + cmd);
|
|
return;
|
|
}
|
|
}
|
|
} else {
|
|
message = data;
|
|
me = false;
|
|
}
|
|
|
|
if(!username) {
|
|
displayError("Sorry, you're anonymous, you cannot chat");
|
|
return;
|
|
}
|
|
|
|
addToChatbox(myid, username, message, me);
|
|
send({
|
|
type: 'chat',
|
|
id: myid,
|
|
username: username,
|
|
value: message,
|
|
me: me,
|
|
});
|
|
}
|
|
|
|
document.getElementById('inputform').onsubmit = function(e) {
|
|
e.preventDefault();
|
|
handleInput();
|
|
};
|
|
|
|
document.getElementById('input').onkeypress = function(e) {
|
|
if(e.key === 'Enter' && !e.ctrlKey && !e.shiftKey && !e.metaKey) {
|
|
e.preventDefault();
|
|
handleInput();
|
|
}
|
|
}
|
|
|
|
function chatResizer(e) {
|
|
e.preventDefault();
|
|
let chat = document.getElementById('chat');
|
|
let start_x = e.clientX;
|
|
let start_width = parseFloat(
|
|
document.defaultView.getComputedStyle(chat).width.replace('px', ''),
|
|
);
|
|
let inputbutton = document.getElementById('inputbutton');
|
|
function start_drag(e) {
|
|
let width = start_width + e.clientX - start_x;
|
|
if(width < 40)
|
|
inputbutton.style.display = 'none';
|
|
else
|
|
inputbutton.style.display = 'inline';
|
|
chat.style.width = width + 'px';
|
|
}
|
|
function stop_drag(e) {
|
|
document.documentElement.removeEventListener(
|
|
'mousemove', start_drag, false,
|
|
);
|
|
document.documentElement.removeEventListener(
|
|
'mouseup', stop_drag, false,
|
|
);
|
|
}
|
|
|
|
document.documentElement.addEventListener(
|
|
'mousemove', start_drag, false,
|
|
);
|
|
document.documentElement.addEventListener(
|
|
'mouseup', stop_drag, false,
|
|
);
|
|
}
|
|
|
|
document.getElementById('resizer').addEventListener('mousedown', chatResizer, false);
|
|
|
|
async function newUpStream() {
|
|
let id = randomid();
|
|
if(up[id])
|
|
throw new Error('Eek!');
|
|
let pc = new RTCPeerConnection({
|
|
iceServers: iceServers,
|
|
});
|
|
if(!pc)
|
|
throw new Error("Couldn't create peer connection")
|
|
up[id] = new Connection(id, pc);
|
|
|
|
pc.onnegotiationneeded = e => negotiate(id);
|
|
|
|
pc.onicecandidate = function(e) {
|
|
if(!e.candidate)
|
|
return;
|
|
send({type: 'ice',
|
|
id: id,
|
|
candidate: e.candidate,
|
|
});
|
|
}
|
|
|
|
pc.ontrack = console.error;
|
|
|
|
return id;
|
|
}
|
|
|
|
async function negotiate(id) {
|
|
let c = up[id];
|
|
if(!c)
|
|
throw new Error('unknown connection');
|
|
let offer = await c.pc.createOffer({});
|
|
if(!offer)
|
|
throw(new Error("Didn't create offer"));
|
|
await c.pc.setLocalDescription(offer);
|
|
send({
|
|
type: 'offer',
|
|
id: id,
|
|
offer: offer,
|
|
});
|
|
}
|
|
|
|
let errorTimeout = null;
|
|
|
|
function setErrorTimeout(ms) {
|
|
if(errorTimeout) {
|
|
clearTimeout(errorTimeout);
|
|
errorTimeout = null;
|
|
}
|
|
if(ms) {
|
|
errorTimeout = setTimeout(clearError, ms);
|
|
}
|
|
}
|
|
|
|
function displayError(message) {
|
|
let errspan = document.getElementById('errspan');
|
|
errspan.textContent = message;
|
|
errspan.classList.remove('noerror');
|
|
errspan.classList.add('error');
|
|
setErrorTimeout(8000);
|
|
}
|
|
|
|
function displayWarning(message) {
|
|
// don't overwrite real errors
|
|
if(!errorTimeout)
|
|
return displayError(message);
|
|
}
|
|
|
|
function clearError() {
|
|
let errspan = document.getElementById('errspan');
|
|
errspan.textContent = '';
|
|
errspan.classList.remove('error');
|
|
errspan.classList.add('noerror');
|
|
setErrorTimeout(null);
|
|
}
|
|
|
|
async function getIceServers() {
|
|
let r = await fetch('/ice-servers.json');
|
|
if(!r.ok)
|
|
throw new Error("Couldn't fetch ICE servers: " +
|
|
r.status + ' ' + r.statusText);
|
|
let servers = await r.json();
|
|
if(!(servers instanceof Array))
|
|
throw new Error("couldn't parse ICE servers");
|
|
iceServers = servers;
|
|
}
|
|
|
|
async function doConnect() {
|
|
await serverConnect();
|
|
await setLocalMedia();
|
|
await setShareMedia();
|
|
}
|
|
|
|
document.getElementById('userform').onsubmit = async function(e) {
|
|
e.preventDefault();
|
|
let username = document.getElementById('username').value.trim();
|
|
let password = document.getElementById('password').value;
|
|
setUserPass(username, password);
|
|
await doConnect();
|
|
}
|
|
|
|
document.getElementById('disconnectbutton').onclick = function(e) {
|
|
socket.close();
|
|
}
|
|
|
|
function start() {
|
|
group = decodeURIComponent(location.pathname.replace(/^\/[a-z]*\//, ''));
|
|
let title = group.charAt(0).toUpperCase() + group.slice(1);
|
|
if(group !== '') {
|
|
document.title = title;
|
|
document.getElementById('title').textContent = title
|
|
}
|
|
|
|
myid = randomid();
|
|
|
|
getIceServers().catch(console.error).then(c => {
|
|
document.getElementById('connectbutton').disabled = false;
|
|
}).then(c => {
|
|
let userpass = getUserPass();
|
|
if(userpass)
|
|
doConnect();
|
|
});
|
|
}
|
|
|
|
start();
|