464 lines
12 KiB
JavaScript
464 lines
12 KiB
JavaScript
/*
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The MIT License (MIT)
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Copyright (c) 2013 Calvin Montgomery
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Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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var ULList = require("./ullist").ULList;
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var AsyncQueue = require("./asyncqueue");
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var Media = require("./media").Media;
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var util = require("./utilities");
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var vimeoWorkaround = require("./get-info").vimeoWorkaround;
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var Config = require("./config");
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var AllPlaylists = {};
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function PlaylistItem(media, uid) {
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this.media = media;
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this.uid = uid;
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this.temp = false;
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this.queueby = "";
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this.prev = null;
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this.next = null;
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}
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PlaylistItem.prototype.pack = function() {
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return {
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media: this.media.pack(),
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uid: this.uid,
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temp: this.temp,
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queueby: this.queueby
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};
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}
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function Playlist(chan) {
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var name = chan.canonical_name;
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if(name in AllPlaylists && AllPlaylists[name]) {
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var pl = AllPlaylists[name];
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if(!pl.dead)
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pl.die();
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}
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this.items = new ULList();
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this.current = null;
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this.next_uid = 0;
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this._leadInterval = false;
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this._lastUpdate = 0;
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this._counter = 0;
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this.leading = true;
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this.callbacks = {
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"changeMedia": [],
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"mediaUpdate": [],
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"remove": [],
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};
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this.fnqueue = new AsyncQueue();
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AllPlaylists[name] = this;
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this.channel = chan;
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this.server = chan.server;
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var pl = this;
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this.on("mediaUpdate", function(m) {
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if (chan.dead) {
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pl.die();
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return;
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}
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chan.sendAll("mediaUpdate", m.timeupdate());
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});
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this.on("changeMedia", function(m) {
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if (chan.dead) {
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pl.die();
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return;
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}
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chan.resetVideo();
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chan.sendAll("setCurrent", pl.current.uid);
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chan.sendAll("changeMedia", m.fullupdate());
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chan.logger.log("[playlist] Now playing: " + m.title + " (" + m.type + ":" + m.id +
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")");
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});
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this.on("remove", function(item) {
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if (chan.dead) {
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pl.die();
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return;
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}
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chan.updatePlaylistMeta();
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chan.sendPlaylistMeta(chan.users);
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chan.sendAll("delete", {
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uid: item.uid
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});
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});
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}
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Playlist.prototype.dump = function() {
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var arr = this.items.toArray();
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var pos = 0;
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for(var i in arr) {
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if(this.current && arr[i].uid == this.current.uid) {
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pos = i;
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break;
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}
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}
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var time = 0;
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if(this.current)
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time = this.current.media.currentTime;
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return {
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pl: arr,
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pos: pos,
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time: time
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};
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}
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Playlist.prototype.die = function () {
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this.clear();
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if(this._leadInterval) {
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clearInterval(this._leadInterval);
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this._leadInterval = false;
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}
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if(this._qaInterval) {
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clearInterval(this._qaInterval);
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this._qaInterval = false;
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}
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//for(var key in this)
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// delete this[key];
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this.dead = true;
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}
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Playlist.prototype.load = function(data, callback) {
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this.clear();
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for(var i in data.pl) {
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var e = data.pl[i].media;
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var m = new Media(e.id, e.title, e.seconds, e.type);
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m.object = e.object;
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m.params = e.params;
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var it = this.makeItem(m);
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it.temp = data.pl[i].temp;
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it.queueby = data.pl[i].queueby;
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this.items.append(it);
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if(i == parseInt(data.pos)) {
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this.current = it;
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}
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}
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if(callback)
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callback();
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}
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Playlist.prototype.on = function(ev, fn) {
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if(typeof fn === "undefined") {
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var pl = this;
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return function() {
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for(var i = 0; i < pl.callbacks[ev].length; i++) {
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pl.callbacks[ev][i].apply(this, arguments);
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}
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}
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}
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else if(typeof fn === "function") {
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this.callbacks[ev].push(fn);
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}
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}
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Playlist.prototype.makeItem = function(media) {
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return new PlaylistItem(media, this.next_uid++);
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}
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Playlist.prototype.add = function(item, pos) {
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var self = this;
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if(this.items.length >= 4000) {
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return "Playlist limit reached (4,000)";
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}
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var it = this.items.findVideoId(item.media.id);
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if(it) {
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if(pos === "append" || it == this.current) {
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return "This item is already on the playlist";
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}
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self.remove(it.uid);
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self.channel.sendAll("delete", {
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uid: it.uid
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});
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self.channel.broadcastPlaylistMeta();
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}
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if(pos == "append") {
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if(!this.items.append(item)) {
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return "Playlist failure";
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}
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} else if(pos == "prepend") {
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if(!this.items.prepend(item)) {
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return "Playlist failure";
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}
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} else {
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if(!this.items.insertAfter(item, pos)) {
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return "Playlist failure";
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}
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}
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if(this.items.length == 1) {
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this.current = item;
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this.startPlayback();
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}
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return false;
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}
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Playlist.prototype.addMedia = function (data) {
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var pos = data.pos;
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if (pos === "next") {
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if (this.current !== null)
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pos = this.current.uid;
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else
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pos = "append";
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}
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var m = new Media(data.id, data.title, data.seconds, data.type);
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m.object = data.object;
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m.params = data.params;
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var item = this.makeItem(m);
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item.queueby = data.queueby;
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item.temp = data.temp;
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return {
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item: item,
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error: this.add(item, pos)
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};
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};
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Playlist.prototype.remove = function (uid) {
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var self = this;
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var item = self.items.find(uid);
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if (item && self.items.remove(uid)) {
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if (item === self.current) {
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self._next();
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}
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return true;
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} else {
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return false;
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}
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}
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Playlist.prototype.move = function (from, after) {
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var it = this.items.find(from);
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if (!this.items.remove(from))
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return false;
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if (after === "prepend") {
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if (!this.items.prepend(it))
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return false;
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} else if (after === "append") {
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if (!this.items.append(it))
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return false;
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} else if (!this.items.insertAfter(it, after)) {
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return false;
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}
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return true;
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}
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Playlist.prototype.next = function() {
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if(!this.current)
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return;
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var it = this.current;
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if (it.temp) {
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if (this.remove(it.uid)) {
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this.on("remove")(it);
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}
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} else {
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this._next();
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}
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return this.current;
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}
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Playlist.prototype._next = function() {
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if(!this.current)
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return;
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this.current = this.current.next;
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if(this.current === null && this.items.first !== null)
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this.current = this.items.first;
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if(this.current) {
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this.startPlayback();
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}
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}
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Playlist.prototype.jump = function(uid) {
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if(!this.current)
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return false;
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var jmp = this.items.find(uid);
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if(!jmp)
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return false;
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var it = this.current;
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this.current = jmp;
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if(this.current) {
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this.startPlayback();
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}
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if(it.temp) {
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if (this.remove(it.uid)) {
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this.on("remove")(it);
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}
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}
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return this.current;
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}
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Playlist.prototype.clear = function() {
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this.items.clear();
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this.next_uid = 0;
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this.current = null;
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clearInterval(this._leadInterval);
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}
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Playlist.prototype.count = function (id) {
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var count = 0;
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this.items.forEach(function (i) {
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if(i.media.id === id)
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count++;
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});
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return count;
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}
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Playlist.prototype.getFullUpdate = function () {
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if (!this.current) {
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return null;
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} else if (!this.current.media) {
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return null;
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} else {
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return this.current.media.fullupdate();
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}
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};
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Playlist.prototype.lead = function(lead) {
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this.leading = lead;
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var pl = this;
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if(!this.leading && this._leadInterval) {
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clearInterval(this._leadInterval);
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this._leadInterval = false;
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}
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else if(this.leading && !this._leadInterval) {
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this._lastUpdate = Date.now();
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this._leadInterval = setInterval(function() {
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pl._leadLoop();
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}, 1000);
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}
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}
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Playlist.prototype.startPlayback = function (time) {
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var self = this;
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if(!self.current || !self.current.media)
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return false;
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if (self.current.media.type === "vi" &&
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!self.current.media.direct &&
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Config.get("vimeo-workaround")) {
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vimeoWorkaround(self.current.media.id, function (direct) {
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if (self.current != null && self.current.media != null) {
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self.current.media.direct = direct;
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self.startPlayback(time);
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}
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});
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return;
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}
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if (!self.leading) {
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self.current.media.paused = false;
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self.current.media.currentTime = time || 0;
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self.on("changeMedia")(self.current.media);
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return;
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}
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time = time || -3;
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self.current.media.paused = time < 0;
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self.current.media.currentTime = time;
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if(self._leadInterval) {
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clearInterval(self._leadInterval);
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self._leadInterval = false;
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}
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self.on("changeMedia")(self.current.media);
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if(!util.isLive(self.current.media.type)) {
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self._lastUpdate = Date.now();
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self._leadInterval = setInterval(function() {
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self._leadLoop();
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}, 1000);
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}
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}
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const UPDATE_INTERVAL = 5;
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Playlist.prototype._leadLoop = function() {
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if(this.current == null)
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return;
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if(this.channel.name == "") {
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this.die();
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return;
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}
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var dt = (Date.now() - this._lastUpdate) / 1000.0;
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var t = this.current.media.currentTime;
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// Transition from lead-in
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if (t < 0 && (t + dt) >= 0) {
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this.current.media.currentTime = 0;
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this.current.media.paused = false;
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this._counter = 0;
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this._lastUpdate = Date.now();
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this.on("mediaUpdate")(this.current.media);
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return;
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}
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this.current.media.currentTime += dt;
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this._lastUpdate = Date.now();
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this._counter++;
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if(this.current.media.currentTime >= this.current.media.seconds + 2) {
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this.next();
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}
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else if(this._counter % UPDATE_INTERVAL == 0) {
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this.on("mediaUpdate")(this.current.media);
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}
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}
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/*
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Delete items from the playlist for which filter(item) returns
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a truthy value
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based on code contributed by http://github.com/unbibium
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*/
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Playlist.prototype.clean = function (filter) {
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var self = this;
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var matches = self.items.findAll(filter);
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var count = 0;
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var deleteNext = function () {
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if (count < matches.length) {
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var uid = matches[count].uid;
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count++;
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if (self.remove(uid)) {
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self.channel.sendAll("delete", {
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uid: uid
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});
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}
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deleteNext();
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} else {
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// refresh meta only once, at the end
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self.channel.broadcastPlaylistMeta();
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}
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};
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// start initial callback
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deleteNext();
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};
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module.exports = Playlist;
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