CyTube/channel.js

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2013-02-16 17:19:59 +00:00
/**
* Copyright 2013 Calvin 'calzoneman' Montgomery
*
* Licensed under Creative Commons Attribution-NonCommercial 3.0
* See http://creativecommons.org/licenses/by-nc/3.0/
*
*/
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var mysql = require('mysql-libmysqlclient');
var Config = require('./config.js');
var Rank = require('./rank.js');
// I should use the <noun><verb>er naming scheme more often
var InfoGetter = require('./get-info.js');
var Media = require('./media.js').Media;
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var ChatCommand = require('./chatcommand.js');
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var Channel = function(name) {
console.log("Opening channel " + name);
this.name = name;
this.registered = false;
this.users = [];
this.queue = [];
this.library = {};
this.currentPosition = -1;
this.currentMedia = null;
this.leader = null;
this.recentChat = [];
this.loadMysql();
};
// Check if this channel is registered
// If it is, fetch the library
Channel.prototype.loadMysql = function() {
var db = mysql.createConnectionSync();
db.connectSync(Config.MYSQL_SERVER, Config.MYSQL_USER,
Config.MYSQL_PASSWORD, Config.MYSQL_DB);
if(!db.connectedSync()) {
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console.log("MySQL Connection Failed");
return false;
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}
// Check if channel exists
var query = 'SELECT * FROM channels WHERE name="{}"'
.replace(/\{\}/, this.name);
var results = db.querySync(query);
var rows = results.fetchAllSync();
if(rows.length == 0) {
console.log("Channel " + this.name + " is unregistered");
return;
}
this.registered = true;
// Load library
var query = 'SELECT * FROM chan_{}_library'
.replace(/\{\}/, this.name);
var results = db.querySync(query);
var rows = results.fetchAllSync();
for(var i = 0; i < rows.length; i++) {
this.library[rows[i].id] = new Media(rows[i].id, rows[i].title, rows[i].seconds, rows[i].type);
}
console.log("Loaded channel " + this.name + " from MySQL DB");
db.closeSync();
}
// Creates a new channel record in the MySQL Database
// Currently unused, but might be useful if I add a registration page
Channel.prototype.createTables = function() {
var db = mysql.createConnectionSync();
db.connectSync(Config.MYSQL_SERVER, Config.MYSQL_USER,
Config.MYSQL_PASSWORD, Config.MYSQL_DB);
if(!db.connectedSync()) {
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console.log("MySQL Connection Failed");
return false;
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}
// Create library table
var query= "CREATE TABLE `chan_{}_library` \
(`id` VARCHAR(255) NOT NULL, \
`title` VARCHAR(255) NOT NULL, \
`seconds` INT NOT NULL, \
`playtime` VARCHAR(8) NOT NULL, \
`type` VARCHAR(2) NOT NULL, \
PRIMARY KEY (`id`)) \
ENGINE = MyISAM;"
.replace(/\{\}/, this.name);
var results = db.querySync(query);
// Create rank table
var query = "CREATE TABLE `chan_{}_ranks` (\
`name` VARCHAR( 32 ) NOT NULL ,\
`rank` INT NOT NULL ,\
UNIQUE (\
`name`\
)\
) ENGINE = MYISAM"
.replace(/\{\}/, this.name);
results = db.querySync(query) || results;
// Insert into global channel table
var query = 'INSERT INTO channels VALUES (NULL, "{}")'
.replace(/\{\}/, this.name);
db.closeSync();
return results;
}
// Retrieves a user's rank from the database
Channel.prototype.getRank = function(name) {
if(!this.isRegistered)
return Rank.Guest;
var db = mysql.createConnectionSync();
db.connectSync(Config.MYSQL_SERVER, Config.MYSQL_USER,
Config.MYSQL_PASSWORD, Config.MYSQL_DB);
if(!db.connectedSync()) {
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console.log("MySQL Connection Failed");
return Rank.Guest;
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}
var query = 'SELECT * FROM chan_{1}_ranks WHERE name="{2}"'
.replace(/\{1\}/, this.name)
.replace(/\{2\}/, name);
var results = db.querySync(query);
var rows = results.fetchAllSync();
if(rows.length == 0) {
return Rank.Guest;
}
db.closeSync();
return rows[0].rank;
}
// Saves a user's rank to the database
Channel.prototype.saveRank = function(user) {
if(!this.registered)
return false;
var db = mysql.createConnectionSync();
db.connectSync(Config.MYSQL_SERVER, Config.MYSQL_USER,
Config.MYSQL_PASSWORD, Config.MYSQL_DB);
if(!db.connectedSync()) {
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console.log("MySQL Connection Failed");
return false;
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}
var query = 'UPDATE chan_{1}_ranks SET rank={2} WHERE name={3}'
.replace(/\{1\}/, this.name)
.replace(/\{2\}/, user.rank)
.replace(/\{3\}/, user.name);
var results = db.querySync(query);
// Gonna have to insert a new one, bugger
if(!results) {
var query = 'INSERT INTO chan_{1}_ranks SET VALUES({2}, {3})'
.replace(/\{1\}/, this.name)
.replace(/\{2\}/, user.name)
.replace(/\{3\}/, user.rank);
results = db.querySync(query);
}
db.closeSync();
return results;
}
// Caches media metadata to the channel library.
// If the channel is registered, stores it in the database as well
Channel.prototype.addToLibrary = function(media) {
this.library[media.id] = media;
if(!this.registered)
return;
var db = mysql.createConnectionSync();
db.connectSync(Config.MYSQL_SERVER, Config.MYSQL_USER,
Config.MYSQL_PASSWORD, Config.MYSQL_DB);
if(!db.connectedSync()) {
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console.log("MySQL Connection Failed");
return false;
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}
var query = 'INSERT INTO chan_{1}_library VALUES ("{2}", "{3}", {4}, "{5}", "{6}")'
.replace(/\{1\}/, this.name)
.replace(/\{2\}/, media.id)
.replace(/\{3\}/, media.title)
.replace(/\{4\}/, media.seconds)
.replace(/\{5\}/, media.duration)
.replace(/\{6\}/, media.type);
var results = db.querySync(query);
db.closeSync();
return results;
}
// Searches the local library for media titles containing query
Channel.prototype.searchLibrary = function(query) {
query = query.toLowerCase();
var results = [];
for(var id in this.library) {
if(this.library[id].title.toLowerCase().indexOf(query) != -1) {
results.push(this.library[id]);
}
}
results.sort(function(a, b) {
var x = a.title.toLowerCase();
var y = b.title.toLowerCase();
return (x == y) ? 0 : (x < y ? -1 : 1);
});
return results;
}
// Called when a new user enters the channel
Channel.prototype.userJoin = function(user) {
// If the channel is empty and isn't registered, the first person
// gets ownership of the channel (temporarily)
if(this.users.length == 0 && !this.registered) {
user.rank = (user.rank < Rank.Owner) ? Rank.Owner : user.rank;
}
this.users.push(user);
if(user.name != "") {
this.broadcastNewUser(user);
}
// Set the new guy up
this.sendPlaylist(user);
this.sendUserlist(user);
this.sendRecentChat(user);
if(user.playerReady)
this.sendMediaUpdate(user);
console.log(user.ip + " joined channel " + this.name);
}
// Called when a user leaves the channel
Channel.prototype.userLeave = function(user) {
this.users.splice(this.users.indexOf(user), 1);
if(user.name != "") {
this.sendAll('userLeave', {
name: user.name
});
}
}
// Queues a new media
Channel.prototype.enqueue = function(data) {
var idx = data.pos == "next" ? this.currentPosition + 1 : this.queue.length;
// Try to look up cached metadata first
if(data.id in this.library) {
this.queue.splice(idx, 0, this.library[data.id]);
this.sendAll('queue', {
media: this.library[data.id].pack(),
pos: idx
});
}
// Query metadata from YouTube
else if(data.type == "yt") {
var callback = (function(chan, id) { return function(res, data) {
if(res != 200) {
return;
}
// Whoever decided on this variable name should be fired
var seconds = data.entry.media$group.yt$duration.seconds;
// This one's slightly better
var title = data.entry.title.$t;
var vid = new Media(id, title, seconds, "yt");
chan.queue.splice(idx, 0, vid);
chan.sendAll('queue', {
media: vid.pack(),
pos: idx
});
chan.addToLibrary(vid);
}})(this, data.id);
InfoGetter.getYTInfo(data.id, callback);
}
// Set up twitch metadata
else if(data.type == "tw") {
var media = new Media(data.id, "Twitch ~ " + data.id, 0, "tw");
this.queue.splice(idx, 0, media);
this.sendAll('queue', {
media: media.pack(),
pos: idx
});
}
// Query metadata from Soundcloud
else if(data.type == "sc") {
var callback = (function(chan, id) { return function(res, data) {
if(res != 200) {
return;
}
var seconds = data.duration / 1000;
var title = data.title;
var vid = new Media(id, title, seconds, "sc");
chan.queue.splice(idx, 0, vid);
chan.sendAll('queue', {
media: vid.pack(),
pos: idx
});
chan.addToLibrary(vid);
}})(this, data.id);
InfoGetter.getSCInfo(data.id, callback);
}
// Query metadata from Vimeo
else if(data.type == "vi") {
var callback = (function(chan, id) { return function(res, data) {
if(res != 200) {
return;
}
data = data[0];
var seconds = data.duration;
var title = data.title;
var vid = new Media(id, title, seconds, "vi");
chan.queue.splice(idx, 0, vid);
chan.sendAll('queue', {
media: vid.pack(),
pos: idx
});
chan.addToLibrary(vid);
}})(this, data.id);
InfoGetter.getVIInfo(data.id, callback);
}
}
// Removes a media from the play queue
Channel.prototype.unqueue = function(data) {
// Stop trying to break my server
if(data.pos < 0 || data.pos >= this.queue.length)
return;
this.queue.splice(data.pos, 1);
this.sendAll('unqueue', {
pos: data.pos
});
if(data.pos < this.currentPosition) {
this.currentPosition--;
this.sendAll('updatePlaylistIdx', {
idx: this.currentPosition
});
}
if(data.pos == this.currentPosition) {
this.currentPosition--;
this.playNext();
}
}
// Play the next media in the queue
Channel.prototype.playNext = function() {
if(this.currentPosition + 1 >= this.queue.length)
return;
this.currentPosition++;
this.currentMedia = this.queue[this.currentPosition];
this.currentMedia.currentTime = 0;
this.sendAll('mediaUpdate', this.currentMedia.packupdate());
this.sendAll('updatePlaylistIdx', {
idx: this.currentPosition
});
// Enable autolead for non-twitch
if(this.leader == null && this.currentMedia.type != "tw") {
time = new Date().getTime();
channelVideoUpdate(this, this.currentMedia.id);
}
}
// Synchronize to a sync packet from the leader
Channel.prototype.update = function(data) {
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if(this.currentMedia == null) {
this.currentMedia = new Media(data.id, data.title, data.seconds, data.type);
this.currentMedia.currentTime = data.currentTime;
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}
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else
this.currentMedia.currentTime = data.seconds;
this.sendAll('mediaUpdate', this.currentMedia.packupdate());
}
// Move something around in the queue
Channel.prototype.moveMedia = function(data) {
if(data.src < 0 || data.src >= this.queue.length)
return;
if(data.dest < 0 || data.dest > this.queue.length)
return;
var media = this.queue[data.src];
this.queue.splice(data.src, 1);
this.queue.splice(data.dest, 0, media);
this.sendAll('moveVideo', {
src: data.src,
dest: data.dest
});
if(data.src < this.currentPosition && data.dest >= this.currentPosition) {
this.currentPosition--;
}
if(data.src > this.currentPosition && data.dest < this.currentPosition) {
this.currentPosition++
}
}
// Chat message from a user
Channel.prototype.chatMessage = function(user, msg) {
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if(msg.indexOf("/") == 0)
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ChatCommand.handle(this, user, msg);
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else if(msg.indexOf(">") == 0)
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this.sendMessage(user.name, msg, "greentext");
else
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this.sendMessage(user.name, msg, "");
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}
Channel.prototype.sendMessage = function(username, msg, msgclass) {
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// I don't want HTML from strangers
msg = msg.replace(/</g, "&lt;").replace(/>/g, "&gt;");
// Match URLs
msg = msg.replace(/(((https?)|(ftp))(:\/\/[0-9a-zA-Z\.]+(:[0-9]+)?[^\s$]+))/, "<a href=\"$1\">$1</a>");
this.sendAll('chatMsg', {
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username: username,
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msg: msg,
msgclass: msgclass
});
this.recentChat.push({
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username: username,
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msg: msg,
msgclass: msgclass
});
if(this.recentChat.length > 15)
this.recentChat.shift();
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};
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// Promotion! Actor is the client who initiated the promotion, name is the
// name of the person being promoted
Channel.prototype.promoteUser = function(actor, name) {
var receiver;
for(var i = 0; i < this.users.length; i++) {
if(this.users[i].name == name) {
receiver = this.users[i];
break;
}
}
if(receiver) {
// You can only promote someone if you are 2 ranks or higher above
// them. This way you can't promote them to your rank and end
// up in a situation where you can't demote them
if(actor.rank > receiver.rank + 1) {
receiver.rank++;
if(receiver.loggedIn) {
this.saveRank(receiver);
}
this.broadcastRankUpdate(receiver);
}
}
}
// You're fired
Channel.prototype.demoteUser = function(actor, name) {
var receiver;
for(var i = 0; i < this.users.length; i++) {
if(this.users[i].name == name) {
receiver = this.users[i];
break;
}
}
if(receiver) {
// Wouldn't it be funny if you could demote people who rank higher
// than you? No, it wouldn't.
if(actor.rank > receiver.rank) {
receiver.rank--;
if(receiver.loggedIn) {
this.saveRank(receiver);
}
this.broadcastRankUpdate(receiver);
}
}
}
// Manual leader. This shouldn't be necessary since the server autoleads,
// but you never know
Channel.prototype.changeLeader = function(name) {
if(this.leader != null) {
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var old = this.leader;
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this.leader = null;
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this.broadcastRankUpdate(old);
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}
if(name == "") {
channelVideoUpdate(this, this.currentMedia.id);
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return;
}
for(var i = 0; i < this.users.length; i++) {
if(this.users[i].name == name) {
this.leader = this.users[i];
this.broadcastRankUpdate(this.leader);
}
}
}
// Send the userlist to a client
// Do you know you're all my very best friends?
Channel.prototype.sendUserlist = function(user) {
var users = [];
for(var i = 0; i < this.users.length; i++) {
// Skip people who haven't logged in
if(this.users[i].name != "") {
users.push({
name: this.users[i].name,
rank: this.users[i].rank,
leader: this.users[i] == this.leader
});
}
}
user.socket.emit('userlist', users)
}
// Send the play queue
Channel.prototype.sendPlaylist = function(user) {
user.socket.emit('playlist', {
pl: this.queue
});
user.socket.emit('updatePlaylistIdx', {
idx: this.currentPosition
});
}
// Send the last 15 messages for context
Channel.prototype.sendRecentChat = function(user) {
for(var i = 0; i < this.recentChat.length; i++) {
user.socket.emit('chatMsg', this.recentChat[i]);
}
}
// Send a sync packet
Channel.prototype.sendMediaUpdate = function(user) {
if(this.currentMedia != null)
user.socket.emit('mediaUpdate', this.currentMedia.packupdate());
}
// Sent when someone logs in, to add them to the user list
Channel.prototype.broadcastNewUser = function(user) {
this.sendAll('addUser', {
name: user.name,
rank: user.rank,
leader: this.leader == user
});
}
// Someone's rank changed, or their leadership status changed
Channel.prototype.broadcastRankUpdate = function(user) {
this.sendAll('updateUser', {
name: user.name,
rank: user.rank,
leader: this.leader == user
});
}
// Send to ALL the clients!
Channel.prototype.sendAll = function(message, data) {
for(var i = 0; i < this.users.length; i++) {
this.users[i].socket.emit(message, data);
}
}
// Accumulator
var i = 0;
// Time of last update
var time = new Date().getTime();
// Autolead yay
function channelVideoUpdate(chan, id) {
// Someone changed the video or there's a manual leader, so your
// argument is invalid
if(id != chan.currentMedia.id || chan.leader != null)
return;
// Add dt since last update
chan.currentMedia.currentTime += (new Date().getTime() - time)/1000.0;
time = new Date().getTime();
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// Video over, move on to next
if(chan.currentMedia.currentTime > chan.currentMedia.seconds) {
chan.playNext();
}
// Every ~5 seconds send a sync packet to everyone
else if(i % 5 == 0)
chan.sendAll('mediaUpdate', chan.currentMedia.packupdate());
i++;
// Do it all over again in about a second
setTimeout(function() { channelVideoUpdate(chan, id); }, 1000);
}
exports.Channel = Channel;