webrtc/webrtc.bundle.js

(function(e){if("function"==typeof bootstrap)bootstrap("webrtc",e);else if("object"==typeof exports)module.exports=e();else if("function"==typeof define&&define.amd)define(e);else if("undefined"!=typeof ses){if(!ses.ok())return;ses.makeWebRTC=e}else"undefined"!=typeof window?window.WebRTC=e():global.WebRTC=e()})(function(){var define,ses,bootstrap,module,exports;
return (function(e,t,n){function i(n,s){if(!t[n]){if(!e[n]){var o=typeof require=="function"&&require;if(!s&&o)return o(n,!0);if(r)return r(n,!0);throw new Error("Cannot find module '"+n+"'")}var u=t[n]={exports:{}};e[n][0].call(u.exports,function(t){var r=e[n][1][t];return i(r?r:t)},u,u.exports)}return t[n].exports}var r=typeof require=="function"&&require;for(var s=0;s<n.length;s++)i(n[s]);return i})({1:[function(require,module,exports){
var webrtc = require('webrtcsupport');
var getUserMedia = require('getusermedia');
var PeerConnection = require('rtcpeerconnection');
var WildEmitter = require('wildemitter');
var hark = require('hark');
var GainController = require('mediastream-gain');
var mockconsole = require('mockconsole');


function WebRTC(opts) {
    var self = this;
    var options = opts || {};
    var config = this.config = {
            debug: false,
            localVideoEl: '',
            remoteVideosEl: '',
            autoRequestMedia: false,
            // makes the entire PC config overridable
            peerConnectionConfig: {
                iceServers: [{"url": "stun:stun.l.google.com:19302"}]
            },
            peerConnectionContraints: {
                optional: [
                    {DtlsSrtpKeyAgreement: true}
                ]
            },
            autoAdjustMic: false,
            media: {
                audio: true,
                video: true
            },
            receiveMedia: {
                mandatory: {
                    OfferToReceiveAudio: true,
                    OfferToReceiveVideo: true
                }
            },
            detectSpeakingEvents: true,
            enableDataChannels: true
        };
    var item, connection;

    // expose screensharing check
    this.screenSharingSupport = webrtc.screenSharing;

    // We also allow a 'logger' option. It can be any object that implements
    // log, warn, and error methods.
    // We log nothing by default, following "the rule of silence":
    // http://www.linfo.org/rule_of_silence.html
    this.logger = function () {
        // we assume that if you're in debug mode and you didn't
        // pass in a logger, you actually want to log as much as
        // possible.
        if (opts.debug) {
            return opts.logger || console;
        } else {
        // or we'll use your logger which should have its own logic
        // for output. Or we'll return the no-op.
            return opts.logger || mockconsole;
        }
    }();

    // set options
    for (item in options) {
        this.config[item] = options[item];
    }

    // check for support
    if (!webrtc.support) {
        this.logger.error('Your browser doesn\'t seem to support WebRTC');
    }

    // where we'll store our peer connections
    this.peers = [];

    WildEmitter.call(this);

    // log events in debug mode
    if (this.config.debug) {
        this.on('*', function (event, val1, val2) {
            var logger;
            // if you didn't pass in a logger and you explicitly turning on debug
            // we're just going to assume you're wanting log output with console
            if (self.config.logger === mockconsole) {
                logger = console;
            } else {
                logger = self.logger;
            }
            logger.log('event:', event, val1, val2);
        });
    }
}

WebRTC.prototype = Object.create(WildEmitter.prototype, {
    constructor: {
        value: WebRTC
    }
});

WebRTC.prototype.createPeer = function (opts) {
    var peer;
    opts.parent = this;
    peer = new Peer(opts);
    this.peers.push(peer);
    return peer;
};

WebRTC.prototype.startLocalMedia = function (mediaConstraints, cb) {
    var self = this;
    var constraints = mediaConstraints || {video: true, audio: true};

    getUserMedia(constraints, function (err, stream) {
        if (!err) {
            if (constraints.audio && self.config.detectSpeakingEvents) {
                self.setupAudioMonitor(stream);
            }
            self.localStream = stream;

            if (self.config.autoAdjustMic) {
                self.gainController = new GainController(stream);
                // start out somewhat muted if we can track audio
                self.setMicIfEnabled(0.5);
            }

            self.emit('localStream', stream);
        }
        if (cb) cb(err, stream);
    });
};

WebRTC.prototype.stopLocalMedia = function () {
    if (this.localStream) {
        this.localStream.stop();
        this.emit('localStreamStopped');
    }
};

// Audio controls
WebRTC.prototype.mute = function () {
    this._audioEnabled(false);
    this.hardMuted = true;
    this.emit('audioOff');
};
WebRTC.prototype.unmute = function () {
    this._audioEnabled(true);
    this.hardMuted = false;
    this.emit('audioOn');
};

// Audio monitor
WebRTC.prototype.setupAudioMonitor = function (stream) {
    this.logger.log('Setup audio');
    var audio = hark(stream);
    var self = this;
    var timeout;

    audio.on('speaking', function () {
        if (self.hardMuted) return;
        self.setMicIfEnabled(1);
        self.sendToAll('speaking', {});
        self.emit('speaking');
    });

    audio.on('stopped_speaking', function () {
        if (self.hardMuted) return;
        if (timeout) clearTimeout(timeout);

        timeout = setTimeout(function () {
            self.setMicIfEnabled(0.5);
            self.sendToAll('stopped_speaking', {});
            self.emit('stoppedSpeaking');
        }, 1000);
    });
    if (this.config.enableDataChannels) {
        // until https://code.google.com/p/chromium/issues/detail?id=121673 is fixed...
        audio.on('volume_change', function (volume, treshold) {
            if (self.hardMuted) return;
            self.emit('volumeChange', volume, treshold);
            self.peers.forEach(function (peer) {
                if (peer.enableDataChannels) {
                    var dc = peer.getDataChannel('hark');
                    if (dc.readyState != 'open') return;
                    dc.send(JSON.stringify({type: 'volume', volume: volume }));
                }
            });
        });
    }
};

// We do this as a seperate method in order to
// still leave the "setMicVolume" as a working
// method.
WebRTC.prototype.setMicIfEnabled = function (volume) {
    if (!this.config.autoAdjustMic) return;
    this.gainController.setGain(volume);
};

// Video controls
WebRTC.prototype.pauseVideo = function () {
    this._videoEnabled(false);
    this.emit('videoOff');
};
WebRTC.prototype.resumeVideo = function () {
    this._videoEnabled(true);
    this.emit('videoOn');
};

// Combined controls
WebRTC.prototype.pause = function () {
    this._audioEnabled(false);
    this.pauseVideo();
};
WebRTC.prototype.resume = function () {
    this._audioEnabled(true);
    this.resumeVideo();
};

// Internal methods for enabling/disabling audio/video
WebRTC.prototype._audioEnabled = function (bool) {
    // work around for chrome 27 bug where disabling tracks
    // doesn't seem to work (works in canary, remove when working)
    this.setMicIfEnabled(bool ? 1 : 0);
    this.localStream.getAudioTracks().forEach(function (track) {
        track.enabled = !!bool;
    });
};
WebRTC.prototype._videoEnabled = function (bool) {
    this.localStream.getVideoTracks().forEach(function (track) {
        track.enabled = !!bool;
    });
};

// removes peers
WebRTC.prototype.removePeers = function (id, type) {
    this.getPeers(id, type).forEach(function (peer) {
        peer.end();
    });
};

// fetches all Peer objects by session id and/or type
WebRTC.prototype.getPeers = function (sessionId, type) {
    return this.peers.filter(function (peer) {
        return (!sessionId || peer.id === sessionId) && (!type || peer.type === type);
    });
};

// sends message to all
WebRTC.prototype.sendToAll = function (message, payload) {
    this.peers.forEach(function (peer) {
        peer.send(message, payload);
    });
};

// sends message to all using a datachannel
WebRTC.prototype.sendDirectlyToAll = function (channel, message, payload) {
    this.peers.forEach(function (peer) {
        if (peer.enableDataChannels) {
            peer.sendDirectly(channel, message, payload);
        }
    });
};

function Peer(options) {
    var self = this;

    this.id = options.id;
    this.parent = options.parent;
    this.type = options.type || 'video';
    this.oneway = options.oneway || false;
    this.sharemyscreen = options.sharemyscreen || false;
    this.browserPrefix = options.prefix;
    this.stream = options.stream;
    this.enableDataChannels = options.enableDataChannels === undefined ? this.parent.config.enableDataChannels : options.enableDataChannels;
    this.receiveMedia = options.receiveMedia || this.parent.config.receiveMedia;
    this.channels = {};
    // Create an RTCPeerConnection via the polyfill
    this.pc = new PeerConnection(this.parent.config.peerConnectionConfig, this.parent.config.peerConnectionContraints);
    this.pc.on('ice', this.onIceCandidate.bind(this));
    this.pc.on('addStream', this.handleRemoteStreamAdded.bind(this));
    this.pc.on('addChannel', this.handleDataChannelAdded.bind(this));
    this.pc.on('removeStream', this.handleStreamRemoved.bind(this));
    // Just fire negotiation needed events for now
    // When browser re-negotiation handling seems to work
    // we can use this as the trigger for starting the offer/answer process
    // automatically. We'll just leave it be for now while this stabalizes.
    this.pc.on('negotiationNeeded', this.emit.bind(this, 'negotiationNeeded'));
    this.logger = this.parent.logger;

    // handle screensharing/broadcast mode
    if (options.type === 'screen') {
        if (this.parent.localScreen && this.sharemyscreen) {
            this.logger.log('adding local screen stream to peer connection');
            this.pc.addStream(this.parent.localScreen);
            this.broadcaster = options.broadcaster;
        }
    } else {
        this.pc.addStream(this.parent.localStream);
    }

    // call emitter constructor
    WildEmitter.call(this);

    // proxy events to parent
    this.on('*', function () {
        self.parent.emit.apply(self.parent, arguments);
    });
}

Peer.prototype = Object.create(WildEmitter.prototype, {
    constructor: {
        value: Peer
    }
});

Peer.prototype.handleMessage = function (message) {
    var self = this;

    this.logger.log('getting', message.type, message);

    if (message.prefix) this.browserPrefix = message.prefix;

    if (message.type === 'offer') {
        this.pc.handleOffer(message.payload, function (err) {
            if (err) {
                return;
            }
            // auto-accept
            self.pc.answer(self.receiveMedia, function (err, sessionDescription) {
                self.send('answer', sessionDescription);
            });
        });
    } else if (message.type === 'answer') {
        this.pc.handleAnswer(message.payload);
    } else if (message.type === 'candidate') {
        this.pc.processIce(message.payload);
    } else if (message.type === 'speaking') {
        this.parent.emit('speaking', {id: message.from});
    } else if (message.type === 'stopped_speaking') {
        this.parent.emit('stopped_speaking', {id: message.from});
    } else if (message.type === 'mute') {
        this.parent.emit('mute', {id: message.from, name: message.payload.name});
    } else if (message.type === 'unmute') {
        this.parent.emit('unmute', {id: message.from, name: message.payload.name});
    }
};

// send via signalling channel
Peer.prototype.send = function (messageType, payload) {
    var message = {
        to: this.id,
        broadcaster: this.broadcaster,
        roomType: this.type,
        type: messageType,
        payload: payload,
        prefix: webrtc.prefix
    };
    this.logger.log('sending', messageType, message);
    this.parent.emit('message', message);
};

// send via data channel
Peer.prototype.sendDirectly = function (channel, messageType, payload) {
    var message = {
        type: messageType,
        payload: payload
    };
    this.logger.log('sending via datachannel', channel, messageType, message);
    this.getDataChannel(channel).send(JSON.stringify(message));
};

// Internal method registering handlers for a data channel and emitting events on the peer
Peer.prototype._observeDataChannel = function (channel) {
    var self = this;
    channel.onclose = this.emit.bind(this, 'channelClose', channel);
    channel.onerror = this.emit.bind(this, 'channelError', channel);
    channel.onmessage = function (event) {
        self.emit('channelMessage', self, channel.label, JSON.parse(event.data), channel, event);
    };
    channel.onopen = this.emit.bind(this, 'channelOpen', channel);
};

// Fetch or create a data channel by the given name
Peer.prototype.getDataChannel = function (name, opts) {
    if (!webrtc.dataChannel) return this.emit('error', new Error('createDataChannel not supported'));
    var channel = this.channels[name];
    opts || (opts = {});
    if (channel) return channel;
    // if we don't have one by this label, create it
    channel = this.channels[name] = this.pc.createDataChannel(name, opts);
    this._observeDataChannel(channel);
    return channel;
};

Peer.prototype.onIceCandidate = function (candidate) {
    if (this.closed) return;
    if (candidate) {
        this.send('candidate', candidate);
    } else {
        this.logger.log("End of candidates.");
    }
};

Peer.prototype.start = function () {
    var self = this;

    // well, the webrtc api requires that we either
    // a) create a datachannel a priori
    // b) do a renegotiation later to add the SCTP m-line
    // Let's do (a) first...
    if (this.enableDataChannels) {
        this.getDataChannel('simplewebrtc');
    }

    this.pc.offer(this.receiveMedia, function (err, sessionDescription) {
        self.send('offer', sessionDescription);
    });
};

Peer.prototype.end = function () {
    if (this.closed) return;
    this.pc.close();
    this.handleStreamRemoved();
};

Peer.prototype.handleRemoteStreamAdded = function (event) {
    var self = this;
    if (this.stream) {
        this.logger.warn('Already have a remote stream');
    } else {
        this.stream = event.stream;
        this.stream.onended = function () {
            self.end();
        };
        this.parent.emit('peerStreamAdded', this);
    }
};

Peer.prototype.handleStreamRemoved = function () {
    this.parent.peers.splice(this.parent.peers.indexOf(this), 1);
    this.closed = true;
    this.parent.emit('peerStreamRemoved', this);
};

Peer.prototype.handleDataChannelAdded = function (channel) {
    this.channels[channel.label] = channel;
    this._observeDataChannel(channel);
};

module.exports = WebRTC;

},{"getusermedia":3,"hark":6,"mediastream-gain":7,"mockconsole":8,"rtcpeerconnection":4,"webrtcsupport":2,"wildemitter":5}],3:[function(require,module,exports){
// getUserMedia helper by @HenrikJoreteg
var func = (navigator.getUserMedia ||
            navigator.webkitGetUserMedia ||
            navigator.mozGetUserMedia ||
            navigator.msGetUserMedia);


module.exports = function (constraints, cb) {
    var options;
    var haveOpts = arguments.length === 2;
    var defaultOpts = {video: true, audio: true};
    var error;
    var denied = 'PERMISSION_DENIED';
    var notSatified = 'CONSTRAINT_NOT_SATISFIED';

    // make constraints optional
    if (!haveOpts) {
        cb = constraints;
        constraints = defaultOpts;
    }

    // treat lack of browser support like an error
    if (!func) {
        // throw proper error per spec
        error = new Error('NavigatorUserMediaError');
        error.name = 'NOT_SUPPORTED_ERROR';
        return cb(error);
    }

    func.call(navigator, constraints, function (stream) {
        cb(null, stream);
    }, function (err) {
        var error;
        // coerce into an error object since FF gives us a string
        // there are only two valid names according to the spec
        // we coerce all non-denied to "constraint not satisfied".
        if (typeof err === 'string') {
            error = new Error('NavigatorUserMediaError');
            if (err === denied) {
                error.name = denied;
            } else {
                error.name = notSatified;
            }
        } else {
            // if we get an error object make sure '.name' property is set
            // according to spec: http://dev.w3.org/2011/webrtc/editor/getusermedia.html#navigatorusermediaerror-and-navigatorusermediaerrorcallback
            error = err;
            if (!error.name) {
                // this is likely chrome which
                // sets a property called "ERROR_DENIED" on the error object
                // if so we make sure to set a name
                if (error[denied]) {
                    err.name = denied;
                } else {
                    err.name = notSatified;
                }
            }
        }

        cb(error);
    });
};

},{}],2:[function(require,module,exports){
// created by @HenrikJoreteg
var prefix;
var isChrome = false;
var isFirefox = false;
var ua = navigator.userAgent.toLowerCase();

// basic sniffing
if (ua.indexOf('firefox') !== -1) {
    prefix = 'moz';
    isFirefox = true;
} else if (ua.indexOf('chrome') !== -1) {
    prefix = 'webkit';
    isChrome = true;
}

var PC = window.mozRTCPeerConnection || window.webkitRTCPeerConnection;
var IceCandidate = window.mozRTCIceCandidate || window.RTCIceCandidate;
var SessionDescription = window.mozRTCSessionDescription || window.RTCSessionDescription;
var MediaStream = window.webkitMediaStream || window.MediaStream;
var screenSharing = navigator.userAgent.match('Chrome') && parseInt(navigator.userAgent.match(/Chrome\/(.*) /)[1], 10) >= 26;
var AudioContext = window.webkitAudioContext || window.AudioContext;


// export support flags and constructors.prototype && PC
module.exports = {
    support: !!PC,
    dataChannel: isChrome || isFirefox || (PC && PC.prototype && PC.prototype.createDataChannel),
    prefix: prefix,
    webAudio: !!(AudioContext && AudioContext.prototype.createMediaStreamSource),
    mediaStream: !!(MediaStream && MediaStream.prototype.removeTrack),
    screenSharing: !!screenSharing,
    AudioContext: AudioContext,
    PeerConnection: PC,
    SessionDescription: SessionDescription,
    IceCandidate: IceCandidate
};

},{}],5:[function(require,module,exports){
/*
WildEmitter.js is a slim little event emitter by @henrikjoreteg largely based 
on @visionmedia's Emitter from UI Kit.

Why? I wanted it standalone.

I also wanted support for wildcard emitters like this:

emitter.on('*', function (eventName, other, event, payloads) {
    
});

emitter.on('somenamespace*', function (eventName, payloads) {
    
});

Please note that callbacks triggered by wildcard registered events also get 
the event name as the first argument.
*/
module.exports = WildEmitter;

function WildEmitter() {
    this.callbacks = {};
}

// Listen on the given `event` with `fn`. Store a group name if present.
WildEmitter.prototype.on = function (event, groupName, fn) {
    var hasGroup = (arguments.length === 3),
        group = hasGroup ? arguments[1] : undefined, 
        func = hasGroup ? arguments[2] : arguments[1];
    func._groupName = group;
    (this.callbacks[event] = this.callbacks[event] || []).push(func);
    return this;
};

// Adds an `event` listener that will be invoked a single
// time then automatically removed.
WildEmitter.prototype.once = function (event, groupName, fn) {
    var self = this,
        hasGroup = (arguments.length === 3),
        group = hasGroup ? arguments[1] : undefined, 
        func = hasGroup ? arguments[2] : arguments[1];
    function on() {
        self.off(event, on);
        func.apply(this, arguments);
    }
    this.on(event, group, on);
    return this;
};

// Unbinds an entire group
WildEmitter.prototype.releaseGroup = function (groupName) {
    var item, i, len, handlers;
    for (item in this.callbacks) {
        handlers = this.callbacks[item];
        for (i = 0, len = handlers.length; i < len; i++) {
            if (handlers[i]._groupName === groupName) {
                //console.log('removing');
                // remove it and shorten the array we're looping through
                handlers.splice(i, 1);
                i--;
                len--;
            }
        }
    }
    return this;
};

// Remove the given callback for `event` or all
// registered callbacks.
WildEmitter.prototype.off = function (event, fn) {
    var callbacks = this.callbacks[event],
        i;
    
    if (!callbacks) return this;

    // remove all handlers
    if (arguments.length === 1) {
        delete this.callbacks[event];
        return this;
    }

    // remove specific handler
    i = callbacks.indexOf(fn);
    callbacks.splice(i, 1);
    return this;
};

// Emit `event` with the given args.
// also calls any `*` handlers
WildEmitter.prototype.emit = function (event) {
    var args = [].slice.call(arguments, 1),
        callbacks = this.callbacks[event],
        specialCallbacks = this.getWildcardCallbacks(event),
        i,
        len,
        item;

    if (callbacks) {
        for (i = 0, len = callbacks.length; i < len; ++i) {
            if (callbacks[i]) {
                callbacks[i].apply(this, args);
            } else {
                break;
            }
        }
    }

    if (specialCallbacks) {
        for (i = 0, len = specialCallbacks.length; i < len; ++i) {
            if (specialCallbacks[i]) {
                specialCallbacks[i].apply(this, [event].concat(args));
            } else {
                break;
            }
        }
    }

    return this;
};

// Helper for for finding special wildcard event handlers that match the event
WildEmitter.prototype.getWildcardCallbacks = function (eventName) {
    var item,
        split,
        result = [];

    for (item in this.callbacks) {
        split = item.split('*');
        if (item === '*' || (split.length === 2 && eventName.slice(0, split[1].length) === split[1])) {
            result = result.concat(this.callbacks[item]);
        }
    }
    return result;
};

},{}],8:[function(require,module,exports){
var methods = "assert,count,debug,dir,dirxml,error,exception,group,groupCollapsed,groupEnd,info,log,markTimeline,profile,profileEnd,time,timeEnd,trace,warn".split(",");
var l = methods.length;
var fn = function () {};
var mockconsole = {};

while (l--) {
    mockconsole[methods[l]] = fn;
}

module.exports = mockconsole;

},{}],6:[function(require,module,exports){
var WildEmitter = require('wildemitter');

function getMaxVolume (analyser, fftBins) {
  var maxVolume = -Infinity;
  analyser.getFloatFrequencyData(fftBins);

  for(var i=0, ii=fftBins.length; i < ii; i++) {
    if (fftBins[i] > maxVolume && fftBins[i] < 0) {
      maxVolume = fftBins[i];
    }
  };

  return maxVolume;
}


var audioContextType = window.webkitAudioContext || window.AudioContext;
// use a single audio context due to hardware limits
var audioContext = null;
module.exports = function(stream, options) {
  var harker = new WildEmitter();


  // make it not break in non-supported browsers
  if (!audioContextType) return harker;

  //Config
  var options = options || {},
      smoothing = (options.smoothing || 0.5),
      interval = (options.interval || 100),
      threshold = options.threshold,
      play = options.play,
      running = true;

  //Setup Audio Context
  if (!audioContext) {
    audioContext = new audioContextType();
  }
  var sourceNode, fftBins, analyser;

  analyser = audioContext.createAnalyser();
  analyser.fftSize = 512;
  analyser.smoothingTimeConstant = smoothing;
  fftBins = new Float32Array(analyser.fftSize);

  if (stream.jquery) stream = stream[0];
  if (stream instanceof HTMLAudioElement) {
    //Audio Tag
    sourceNode = audioContext.createMediaElementSource(stream);
    if (typeof play === 'undefined') play = true;
    threshold = threshold || -65;
  } else {
    //WebRTC Stream
    sourceNode = audioContext.createMediaStreamSource(stream);
    threshold = threshold || -45;
  }

  sourceNode.connect(analyser);
  if (play) analyser.connect(audioContext.destination);

  harker.speaking = false;

  harker.setThreshold = function(t) {
    threshold = t;
  };

  harker.setInterval = function(i) {
    interval = i;
  };
  
  harker.stop = function() {
    running = false;
    harker.emit('volume_change', -100, threshold);
    if (harker.speaking) {
      harker.speaking = false;
      harker.emit('stopped_speaking');
    }
  };

  // Poll the analyser node to determine if speaking
  // and emit events if changed
  var looper = function() {
    setTimeout(function() {
    
      //check if stop has been called
      if(!running) {
        return;
      }
      
      var currentVolume = getMaxVolume(analyser, fftBins);

      harker.emit('volume_change', currentVolume, threshold);

      if (currentVolume > threshold) {
        if (!harker.speaking) {
          harker.speaking = true;
          harker.emit('speaking');
        }
      } else {
        if (harker.speaking) {
          harker.speaking = false;
          harker.emit('stopped_speaking');
        }
      }

      looper();
    }, interval);
  };
  looper();


  return harker;
}

},{"wildemitter":9}],10:[function(require,module,exports){
var events = require('events');

exports.isArray = isArray;
exports.isDate = function(obj){return Object.prototype.toString.call(obj) === '[object Date]'};
exports.isRegExp = function(obj){return Object.prototype.toString.call(obj) === '[object RegExp]'};


exports.print = function () {};
exports.puts = function () {};
exports.debug = function() {};

exports.inspect = function(obj, showHidden, depth, colors) {
  var seen = [];

  var stylize = function(str, styleType) {
    // http://en.wikipedia.org/wiki/ANSI_escape_code#graphics
    var styles =
        { 'bold' : [1, 22],
          'italic' : [3, 23],
          'underline' : [4, 24],
          'inverse' : [7, 27],
          'white' : [37, 39],
          'grey' : [90, 39],
          'black' : [30, 39],
          'blue' : [34, 39],
          'cyan' : [36, 39],
          'green' : [32, 39],
          'magenta' : [35, 39],
          'red' : [31, 39],
          'yellow' : [33, 39] };

    var style =
        { 'special': 'cyan',
          'number': 'blue',
          'boolean': 'yellow',
          'undefined': 'grey',
          'null': 'bold',
          'string': 'green',
          'date': 'magenta',
          // "name": intentionally not styling
          'regexp': 'red' }[styleType];

    if (style) {
      return '\u001b[' + styles[style][0] + 'm' + str +
             '\u001b[' + styles[style][1] + 'm';
    } else {
      return str;
    }
  };
  if (! colors) {
    stylize = function(str, styleType) { return str; };
  }

  function format(value, recurseTimes) {
    // Provide a hook for user-specified inspect functions.
    // Check that value is an object with an inspect function on it
    if (value && typeof value.inspect === 'function' &&
        // Filter out the util module, it's inspect function is special
        value !== exports &&
        // Also filter out any prototype objects using the circular check.
        !(value.constructor && value.constructor.prototype === value)) {
      return value.inspect(recurseTimes);
    }

    // Primitive types cannot have properties
    switch (typeof value) {
      case 'undefined':
        return stylize('undefined', 'undefined');

      case 'string':
        var simple = '\'' + JSON.stringify(value).replace(/^"|"$/g, '')
                                                 .replace(/'/g, "\\'")
                                                 .replace(/\\"/g, '"') + '\'';
        return stylize(simple, 'string');

      case 'number':
        return stylize('' + value, 'number');

      case 'boolean':
        return stylize('' + value, 'boolean');
    }
    // For some reason typeof null is "object", so special case here.
    if (value === null) {
      return stylize('null', 'null');
    }

    // Look up the keys of the object.
    var visible_keys = Object_keys(value);
    var keys = showHidden ? Object_getOwnPropertyNames(value) : visible_keys;

    // Functions without properties can be shortcutted.
    if (typeof value === 'function' && keys.length === 0) {
      if (isRegExp(value)) {
        return stylize('' + value, 'regexp');
      } else {
        var name = value.name ? ': ' + value.name : '';
        return stylize('[Function' + name + ']', 'special');
      }
    }

    // Dates without properties can be shortcutted
    if (isDate(value) && keys.length === 0) {
      return stylize(value.toUTCString(), 'date');
    }

    var base, type, braces;
    // Determine the object type
    if (isArray(value)) {
      type = 'Array';
      braces = ['[', ']'];
    } else {
      type = 'Object';
      braces = ['{', '}'];
    }

    // Make functions say that they are functions
    if (typeof value === 'function') {
      var n = value.name ? ': ' + value.name : '';
      base = (isRegExp(value)) ? ' ' + value : ' [Function' + n + ']';
    } else {
      base = '';
    }

    // Make dates with properties first say the date
    if (isDate(value)) {
      base = ' ' + value.toUTCString();
    }

    if (keys.length === 0) {
      return braces[0] + base + braces[1];
    }

    if (recurseTimes < 0) {
      if (isRegExp(value)) {
        return stylize('' + value, 'regexp');
      } else {
        return stylize('[Object]', 'special');
      }
    }

    seen.push(value);

    var output = keys.map(function(key) {
      var name, str;
      if (value.__lookupGetter__) {
        if (value.__lookupGetter__(key)) {
          if (value.__lookupSetter__(key)) {
            str = stylize('[Getter/Setter]', 'special');
          } else {
            str = stylize('[Getter]', 'special');
          }
        } else {
          if (value.__lookupSetter__(key)) {
            str = stylize('[Setter]', 'special');
          }
        }
      }
      if (visible_keys.indexOf(key) < 0) {
        name = '[' + key + ']';
      }
      if (!str) {
        if (seen.indexOf(value[key]) < 0) {
          if (recurseTimes === null) {
            str = format(value[key]);
          } else {
            str = format(value[key], recurseTimes - 1);
          }
          if (str.indexOf('\n') > -1) {
            if (isArray(value)) {
              str = str.split('\n').map(function(line) {
                return '  ' + line;
              }).join('\n').substr(2);
            } else {
              str = '\n' + str.split('\n').map(function(line) {
                return '   ' + line;
              }).join('\n');
            }
          }
        } else {
          str = stylize('[Circular]', 'special');
        }
      }
      if (typeof name === 'undefined') {
        if (type === 'Array' && key.match(/^\d+$/)) {
          return str;
        }
        name = JSON.stringify('' + key);
        if (name.match(/^"([a-zA-Z_][a-zA-Z_0-9]*)"$/)) {
          name = name.substr(1, name.length - 2);
          name = stylize(name, 'name');
        } else {
          name = name.replace(/'/g, "\\'")
                     .replace(/\\"/g, '"')
                     .replace(/(^"|"$)/g, "'");
          name = stylize(name, 'string');
        }
      }

      return name + ': ' + str;
    });

    seen.pop();

    var numLinesEst = 0;
    var length = output.reduce(function(prev, cur) {
      numLinesEst++;
      if (cur.indexOf('\n') >= 0) numLinesEst++;
      return prev + cur.length + 1;
    }, 0);

    if (length > 50) {
      output = braces[0] +
               (base === '' ? '' : base + '\n ') +
               ' ' +
               output.join(',\n  ') +
               ' ' +
               braces[1];

    } else {
      output = braces[0] + base + ' ' + output.join(', ') + ' ' + braces[1];
    }

    return output;
  }
  return format(obj, (typeof depth === 'undefined' ? 2 : depth));
};


function isArray(ar) {
  return Array.isArray(ar) ||
         (typeof ar === 'object' && Object.prototype.toString.call(ar) === '[object Array]');
}


function isRegExp(re) {
  typeof re === 'object' && Object.prototype.toString.call(re) === '[object RegExp]';
}


function isDate(d) {
  return typeof d === 'object' && Object.prototype.toString.call(d) === '[object Date]';
}

function pad(n) {
  return n < 10 ? '0' + n.toString(10) : n.toString(10);
}

var months = ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep',
              'Oct', 'Nov', 'Dec'];

// 26 Feb 16:19:34
function timestamp() {
  var d = new Date();
  var time = [pad(d.getHours()),
              pad(d.getMinutes()),
              pad(d.getSeconds())].join(':');
  return [d.getDate(), months[d.getMonth()], time].join(' ');
}

exports.log = function (msg) {};

exports.pump = null;

var Object_keys = Object.keys || function (obj) {
    var res = [];
    for (var key in obj) res.push(key);
    return res;
};

var Object_getOwnPropertyNames = Object.getOwnPropertyNames || function (obj) {
    var res = [];
    for (var key in obj) {
        if (Object.hasOwnProperty.call(obj, key)) res.push(key);
    }
    return res;
};

var Object_create = Object.create || function (prototype, properties) {
    // from es5-shim
    var object;
    if (prototype === null) {
        object = { '__proto__' : null };
    }
    else {
        if (typeof prototype !== 'object') {
            throw new TypeError(
                'typeof prototype[' + (typeof prototype) + '] != \'object\''
            );
        }
        var Type = function () {};
        Type.prototype = prototype;
        object = new Type();
        object.__proto__ = prototype;
    }
    if (typeof properties !== 'undefined' && Object.defineProperties) {
        Object.defineProperties(object, properties);
    }
    return object;
};

exports.inherits = function(ctor, superCtor) {
  ctor.super_ = superCtor;
  ctor.prototype = Object_create(superCtor.prototype, {
    constructor: {
      value: ctor,
      enumerable: false,
      writable: true,
      configurable: true
    }
  });
};

var formatRegExp = /%[sdj%]/g;
exports.format = function(f) {
  if (typeof f !== 'string') {
    var objects = [];
    for (var i = 0; i < arguments.length; i++) {
      objects.push(exports.inspect(arguments[i]));
    }
    return objects.join(' ');
  }

  var i = 1;
  var args = arguments;
  var len = args.length;
  var str = String(f).replace(formatRegExp, function(x) {
    if (x === '%%') return '%';
    if (i >= len) return x;
    switch (x) {
      case '%s': return String(args[i++]);
      case '%d': return Number(args[i++]);
      case '%j': return JSON.stringify(args[i++]);
      default:
        return x;
    }
  });
  for(var x = args[i]; i < len; x = args[++i]){
    if (x === null || typeof x !== 'object') {
      str += ' ' + x;
    } else {
      str += ' ' + exports.inspect(x);
    }
  }
  return str;
};

},{"events":11}],12:[function(require,module,exports){
//     Underscore.js 1.6.0
//     http://underscorejs.org
//     (c) 2009-2014 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
//     Underscore may be freely distributed under the MIT license.

(function() {

  // Baseline setup
  // --------------

  // Establish the root object, `window` in the browser, or `exports` on the server.
  var root = this;

  // Save the previous value of the `_` variable.
  var previousUnderscore = root._;

  // Establish the object that gets returned to break out of a loop iteration.
  var breaker = {};

  // Save bytes in the minified (but not gzipped) version:
  var ArrayProto = Array.prototype, ObjProto = Object.prototype, FuncProto = Function.prototype;

  // Create quick reference variables for speed access to core prototypes.
  var
    push             = ArrayProto.push,
    slice            = ArrayProto.slice,
    concat           = ArrayProto.concat,
    toString         = ObjProto.toString,
    hasOwnProperty   = ObjProto.hasOwnProperty;

  // All **ECMAScript 5** native function implementations that we hope to use
  // are declared here.
  var
    nativeForEach      = ArrayProto.forEach,
    nativeMap          = ArrayProto.map,
    nativeReduce       = ArrayProto.reduce,
    nativeReduceRight  = ArrayProto.reduceRight,
    nativeFilter       = ArrayProto.filter,
    nativeEvery        = ArrayProto.every,
    nativeSome         = ArrayProto.some,
    nativeIndexOf      = ArrayProto.indexOf,
    nativeLastIndexOf  = ArrayProto.lastIndexOf,
    nativeIsArray      = Array.isArray,
    nativeKeys         = Object.keys,
    nativeBind         = FuncProto.bind;

  // Create a safe reference to the Underscore object for use below.
  var _ = function(obj) {
    if (obj instanceof _) return obj;
    if (!(this instanceof _)) return new _(obj);
    this._wrapped = obj;
  };

  // Export the Underscore object for **Node.js**, with
  // backwards-compatibility for the old `require()` API. If we're in
  // the browser, add `_` as a global object via a string identifier,
  // for Closure Compiler "advanced" mode.
  if (typeof exports !== 'undefined') {
    if (typeof module !== 'undefined' && module.exports) {
      exports = module.exports = _;
    }
    exports._ = _;
  } else {
    root._ = _;
  }

  // Current version.
  _.VERSION = '1.6.0';

  // Collection Functions
  // --------------------

  // The cornerstone, an `each` implementation, aka `forEach`.
  // Handles objects with the built-in `forEach`, arrays, and raw objects.
  // Delegates to **ECMAScript 5**'s native `forEach` if available.
  var each = _.each = _.forEach = function(obj, iterator, context) {
    if (obj == null) return obj;
    if (nativeForEach && obj.forEach === nativeForEach) {
      obj.forEach(iterator, context);
    } else if (obj.length === +obj.length) {
      for (var i = 0, length = obj.length; i < length; i++) {
        if (iterator.call(context, obj[i], i, obj) === breaker) return;
      }
    } else {
      var keys = _.keys(obj);
      for (var i = 0, length = keys.length; i < length; i++) {
        if (iterator.call(context, obj[keys[i]], keys[i], obj) === breaker) return;
      }
    }
    return obj;
  };

  // Return the results of applying the iterator to each element.
  // Delegates to **ECMAScript 5**'s native `map` if available.
  _.map = _.collect = function(obj, iterator, context) {
    var results = [];
    if (obj == null) return results;
    if (nativeMap && obj.map === nativeMap) return obj.map(iterator, context);
    each(obj, function(value, index, list) {
      results.push(iterator.call(context, value, index, list));
    });
    return results;
  };

  var reduceError = 'Reduce of empty array with no initial value';

  // **Reduce** builds up a single result from a list of values, aka `inject`,
  // or `foldl`. Delegates to **ECMAScript 5**'s native `reduce` if available.
  _.reduce = _.foldl = _.inject = function(obj, iterator, memo, context) {
    var initial = arguments.length > 2;
    if (obj == null) obj = [];
    if (nativeReduce && obj.reduce === nativeReduce) {
      if (context) iterator = _.bind(iterator, context);
      return initial ? obj.reduce(iterator, memo) : obj.reduce(iterator);
    }
    each(obj, function(value, index, list) {
      if (!initial) {
        memo = value;
        initial = true;
      } else {
        memo = iterator.call(context, memo, value, index, list);
      }
    });
    if (!initial) throw new TypeError(reduceError);
    return memo;
  };

  // The right-associative version of reduce, also known as `foldr`.
  // Delegates to **ECMAScript 5**'s native `reduceRight` if available.
  _.reduceRight = _.foldr = function(obj, iterator, memo, context) {
    var initial = arguments.length > 2;
    if (obj == null) obj = [];
    if (nativeReduceRight && obj.reduceRight === nativeReduceRight) {
      if (context) iterator = _.bind(iterator, context);
      return initial ? obj.reduceRight(iterator, memo) : obj.reduceRight(iterator);
    }
    var length = obj.length;
    if (length !== +length) {
      var keys = _.keys(obj);
      length = keys.length;
    }
    each(obj, function(value, index, list) {
      index = keys ? keys[--length] : --length;
      if (!initial) {
        memo = obj[index];
        initial = true;
      } else {
        memo = iterator.call(context, memo, obj[index], index, list);
      }
    });
    if (!initial) throw new TypeError(reduceError);
    return memo;
  };

  // Return the first value which passes a truth test. Aliased as `detect`.
  _.find = _.detect = function(obj, predicate, context) {
    var result;
    any(obj, function(value, index, list) {
      if (predicate.call(context, value, index, list)) {
        result = value;
        return true;
      }
    });
    return result;
  };

  // Return all the elements that pass a truth test.
  // Delegates to **ECMAScript 5**'s native `filter` if available.
  // Aliased as `select`.
  _.filter = _.select = function(obj, predicate, context) {
    var results = [];
    if (obj == null) return results;
    if (nativeFilter && obj.filter === nativeFilter) return obj.filter(predicate, context);
    each(obj, function(value, index, list) {
      if (predicate.call(context, value, index, list)) results.push(value);
    });
    return results;
  };

  // Return all the elements for which a truth test fails.
  _.reject = function(obj, predicate, context) {
    return _.filter(obj, function(value, index, list) {
      return !predicate.call(context, value, index, list);
    }, context);
  };

  // Determine whether all of the elements match a truth test.
  // Delegates to **ECMAScript 5**'s native `every` if available.
  // Aliased as `all`.
  _.every = _.all = function(obj, predicate, context) {
    predicate || (predicate = _.identity);
    var result = true;
    if (obj == null) return result;
    if (nativeEvery && obj.every === nativeEvery) return obj.every(predicate, context);
    each(obj, function(value, index, list) {
      if (!(result = result && predicate.call(context, value, index, list))) return breaker;
    });
    return !!result;
  };

  // Determine if at least one element in the object matches a truth test.
  // Delegates to **ECMAScript 5**'s native `some` if available.
  // Aliased as `any`.
  var any = _.some = _.any = function(obj, predicate, context) {
    predicate || (predicate = _.identity);
    var result = false;
    if (obj == null) return result;
    if (nativeSome && obj.some === nativeSome) return obj.some(predicate, context);
    each(obj, function(value, index, list) {
      if (result || (result = predicate.call(context, value, index, list))) return breaker;
    });
    return !!result;
  };

  // Determine if the array or object contains a given value (using `===`).
  // Aliased as `include`.
  _.contains = _.include = function(obj, target) {
    if (obj == null) return false;
    if (nativeIndexOf && obj.indexOf === nativeIndexOf) return obj.indexOf(target) != -1;
    return any(obj, function(value) {
      return value === target;
    });
  };

  // Invoke a method (with arguments) on every item in a collection.
  _.invoke = function(obj, method) {
    var args = slice.call(arguments, 2);
    var isFunc = _.isFunction(method);
    return _.map(obj, function(value) {
      return (isFunc ? method : value[method]).apply(value, args);
    });
  };

  // Convenience version of a common use case of `map`: fetching a property.
  _.pluck = function(obj, key) {
    return _.map(obj, _.property(key));
  };

  // Convenience version of a common use case of `filter`: selecting only objects
  // containing specific `key:value` pairs.
  _.where = function(obj, attrs) {
    return _.filter(obj, _.matches(attrs));
  };

  // Convenience version of a common use case of `find`: getting the first object
  // containing specific `key:value` pairs.
  _.findWhere = function(obj, attrs) {
    return _.find(obj, _.matches(attrs));
  };

  // Return the maximum element or (element-based computation).
  // Can't optimize arrays of integers longer than 65,535 elements.
  // See [WebKit Bug 80797](https://bugs.webkit.org/show_bug.cgi?id=80797)
  _.max = function(obj, iterator, context) {
    if (!iterator && _.isArray(obj) && obj[0] === +obj[0] && obj.length < 65535) {
      return Math.max.apply(Math, obj);
    }
    var result = -Infinity, lastComputed = -Infinity;
    each(obj, function(value, index, list) {
      var computed = iterator ? iterator.call(context, value, index, list) : value;
      if (computed > lastComputed) {
        result = value;
        lastComputed = computed;
      }
    });
    return result;
  };

  // Return the minimum element (or element-based computation).
  _.min = function(obj, iterator, context) {
    if (!iterator && _.isArray(obj) && obj[0] === +obj[0] && obj.length < 65535) {
      return Math.min.apply(Math, obj);
    }
    var result = Infinity, lastComputed = Infinity;
    each(obj, function(value, index, list) {
      var computed = iterator ? iterator.call(context, value, index, list) : value;
      if (computed < lastComputed) {
        result = value;
        lastComputed = computed;
      }
    });
    return result;
  };

  // Shuffle an array, using the modern version of the
  // [Fisher-Yates shuffle](http://en.wikipedia.org/wiki/Fisher–Yates_shuffle).
  _.shuffle = function(obj) {
    var rand;
    var index = 0;
    var shuffled = [];
    each(obj, function(value) {
      rand = _.random(index++);
      shuffled[index - 1] = shuffled[rand];
      shuffled[rand] = value;
    });
    return shuffled;
  };

  // Sample **n** random values from a collection.
  // If **n** is not specified, returns a single random element.
  // The internal `guard` argument allows it to work with `map`.
  _.sample = function(obj, n, guard) {
    if (n == null || guard) {
      if (obj.length !== +obj.length) obj = _.values(obj);
      return obj[_.random(obj.length - 1)];
    }
    return _.shuffle(obj).slice(0, Math.max(0, n));
  };

  // An internal function to generate lookup iterators.
  var lookupIterator = function(value) {
    if (value == null) return _.identity;
    if (_.isFunction(value)) return value;
    return _.property(value);
  };

  // Sort the object's values by a criterion produced by an iterator.
  _.sortBy = function(obj, iterator, context) {
    iterator = lookupIterator(iterator);
    return _.pluck(_.map(obj, function(value, index, list) {
      return {
        value: value,
        index: index,
        criteria: iterator.call(context, value, index, list)
      };
    }).sort(function(left, right) {
      var a = left.criteria;
      var b = right.criteria;
      if (a !== b) {
        if (a > b || a === void 0) return 1;
        if (a < b || b === void 0) return -1;
      }
      return left.index - right.index;
    }), 'value');
  };

  // An internal function used for aggregate "group by" operations.
  var group = function(behavior) {
    return function(obj, iterator, context) {
      var result = {};
      iterator = lookupIterator(iterator);
      each(obj, function(value, index) {
        var key = iterator.call(context, value, index, obj);
        behavior(result, key, value);
      });
      return result;
    };
  };

  // Groups the object's values by a criterion. Pass either a string attribute
  // to group by, or a function that returns the criterion.
  _.groupBy = group(function(result, key, value) {
    _.has(result, key) ? result[key].push(value) : result[key] = [value];
  });

  // Indexes the object's values by a criterion, similar to `groupBy`, but for
  // when you know that your index values will be unique.
  _.indexBy = group(function(result, key, value) {
    result[key] = value;
  });

  // Counts instances of an object that group by a certain criterion. Pass
  // either a string attribute to count by, or a function that returns the
  // criterion.
  _.countBy = group(function(result, key) {
    _.has(result, key) ? result[key]++ : result[key] = 1;
  });

  // Use a comparator function to figure out the smallest index at which
  // an object should be inserted so as to maintain order. Uses binary search.
  _.sortedIndex = function(array, obj, iterator, context) {
    iterator = lookupIterator(iterator);
    var value = iterator.call(context, obj);
    var low = 0, high = array.length;
    while (low < high) {
      var mid = (low + high) >>> 1;
      iterator.call(context, array[mid]) < value ? low = mid + 1 : high = mid;
    }
    return low;
  };

  // Safely create a real, live array from anything iterable.
  _.toArray = function(obj) {
    if (!obj) return [];
    if (_.isArray(obj)) return slice.call(obj);
    if (obj.length === +obj.length) return _.map(obj, _.identity);
    return _.values(obj);
  };

  // Return the number of elements in an object.
  _.size = function(obj) {
    if (obj == null) return 0;
    return (obj.length === +obj.length) ? obj.length : _.keys(obj).length;
  };

  // Array Functions
  // ---------------

  // Get the first element of an array. Passing **n** will return the first N
  // values in the array. Aliased as `head` and `take`. The **guard** check
  // allows it to work with `_.map`.
  _.first = _.head = _.take = function(array, n, guard) {
    if (array == null) return void 0;
    if ((n == null) || guard) return array[0];
    if (n < 0) return [];
    return slice.call(array, 0, n);
  };

  // Returns everything but the last entry of the array. Especially useful on
  // the arguments object. Passing **n** will return all the values in
  // the array, excluding the last N. The **guard** check allows it to work with
  // `_.map`.
  _.initial = function(array, n, guard) {
    return slice.call(array, 0, array.length - ((n == null) || guard ? 1 : n));
  };

  // Get the last element of an array. Passing **n** will return the last N
  // values in the array. The **guard** check allows it to work with `_.map`.
  _.last = function(array, n, guard) {
    if (array == null) return void 0;
    if ((n == null) || guard) return array[array.length - 1];
    return slice.call(array, Math.max(array.length - n, 0));
  };

  // Returns everything but the first entry of the array. Aliased as `tail` and `drop`.
  // Especially useful on the arguments object. Passing an **n** will return
  // the rest N values in the array. The **guard**
  // check allows it to work with `_.map`.
  _.rest = _.tail = _.drop = function(array, n, guard) {
    return slice.call(array, (n == null) || guard ? 1 : n);
  };

  // Trim out all falsy values from an array.
  _.compact = function(array) {
    return _.filter(array, _.identity);
  };

  // Internal implementation of a recursive `flatten` function.
  var flatten = function(input, shallow, output) {
    if (shallow && _.every(input, _.isArray)) {
      return concat.apply(output, input);
    }
    each(input, function(value) {
      if (_.isArray(value) || _.isArguments(value)) {
        shallow ? push.apply(output, value) : flatten(value, shallow, output);
      } else {
        output.push(value);
      }
    });
    return output;
  };

  // Flatten out an array, either recursively (by default), or just one level.
  _.flatten = function(array, shallow) {
    return flatten(array, shallow, []);
  };

  // Return a version of the array that does not contain the specified value(s).
  _.without = function(array) {
    return _.difference(array, slice.call(arguments, 1));
  };

  // Split an array into two arrays: one whose elements all satisfy the given
  // predicate, and one whose elements all do not satisfy the predicate.
  _.partition = function(array, predicate) {
    var pass = [], fail = [];
    each(array, function(elem) {
      (predicate(elem) ? pass : fail).push(elem);
    });
    return [pass, fail];
  };

  // Produce a duplicate-free version of the array. If the array has already
  // been sorted, you have the option of using a faster algorithm.
  // Aliased as `unique`.
  _.uniq = _.unique = function(array, isSorted, iterator, context) {
    if (_.isFunction(isSorted)) {
      context = iterator;
      iterator = isSorted;
      isSorted = false;
    }
    var initial = iterator ? _.map(array, iterator, context) : array;
    var results = [];
    var seen = [];
    each(initial, function(value, index) {
      if (isSorted ? (!index || seen[seen.length - 1] !== value) : !_.contains(seen, value)) {
        seen.push(value);
        results.push(array[index]);
      }
    });
    return results;
  };

  // Produce an array that contains the union: each distinct element from all of
  // the passed-in arrays.
  _.union = function() {
    return _.uniq(_.flatten(arguments, true));
  };

  // Produce an array that contains every item shared between all the
  // passed-in arrays.
  _.intersection = function(array) {
    var rest = slice.call(arguments, 1);
    return _.filter(_.uniq(array), function(item) {
      return _.every(rest, function(other) {
        return _.contains(other, item);
      });
    });
  };

  // Take the difference between one array and a number of other arrays.
  // Only the elements present in just the first array will remain.
  _.difference = function(array) {
    var rest = concat.apply(ArrayProto, slice.call(arguments, 1));
    return _.filter(array, function(value){ return !_.contains(rest, value); });
  };

  // Zip together multiple lists into a single array -- elements that share
  // an index go together.
  _.zip = function() {
    var length = _.max(_.pluck(arguments, 'length').concat(0));
    var results = new Array(length);
    for (var i = 0; i < length; i++) {
      results[i] = _.pluck(arguments, '' + i);
    }
    return results;
  };

  // Converts lists into objects. Pass either a single array of `[key, value]`
  // pairs, or two parallel arrays of the same length -- one of keys, and one of
  // the corresponding values.
  _.object = function(list, values) {
    if (list == null) return {};
    var result = {};
    for (var i = 0, length = list.length; i < length; i++) {
      if (values) {
        result[list[i]] = values[i];
      } else {
        result[list[i][0]] = list[i][1];
      }
    }
    return result;
  };

  // If the browser doesn't supply us with indexOf (I'm looking at you, **MSIE**),
  // we need this function. Return the position of the first occurrence of an
  // item in an array, or -1 if the item is not included in the array.
  // Delegates to **ECMAScript 5**'s native `indexOf` if available.
  // If the array is large and already in sort order, pass `true`
  // for **isSorted** to use binary search.
  _.indexOf = function(array, item, isSorted) {
    if (array == null) return -1;
    var i = 0, length = array.length;
    if (isSorted) {
      if (typeof isSorted == 'number') {
        i = (isSorted < 0 ? Math.max(0, length + isSorted) : isSorted);
      } else {
        i = _.sortedIndex(array, item);
        return array[i] === item ? i : -1;
      }
    }
    if (nativeIndexOf && array.indexOf === nativeIndexOf) return array.indexOf(item, isSorted);
    for (; i < length; i++) if (array[i] === item) return i;
    return -1;
  };

  // Delegates to **ECMAScript 5**'s native `lastIndexOf` if available.
  _.lastIndexOf = function(array, item, from) {
    if (array == null) return -1;
    var hasIndex = from != null;
    if (nativeLastIndexOf && array.lastIndexOf === nativeLastIndexOf) {
      return hasIndex ? array.lastIndexOf(item, from) : array.lastIndexOf(item);
    }
    var i = (hasIndex ? from : array.length);
    while (i--) if (array[i] === item) return i;
    return -1;
  };

  // Generate an integer Array containing an arithmetic progression. A port of
  // the native Python `range()` function. See
  // [the Python documentation](http://docs.python.org/library/functions.html#range).
  _.range = function(start, stop, step) {
    if (arguments.length <= 1) {
      stop = start || 0;
      start = 0;
    }
    step = arguments[2] || 1;

    var length = Math.max(Math.ceil((stop - start) / step), 0);
    var idx = 0;
    var range = new Array(length);

    while(idx < length) {
      range[idx++] = start;
      start += step;
    }

    return range;
  };

  // Function (ahem) Functions
  // ------------------

  // Reusable constructor function for prototype setting.
  var ctor = function(){};

  // Create a function bound to a given object (assigning `this`, and arguments,
  // optionally). Delegates to **ECMAScript 5**'s native `Function.bind` if
  // available.
  _.bind = function(func, context) {
    var args, bound;
    if (nativeBind && func.bind === nativeBind) return nativeBind.apply(func, slice.call(arguments, 1));
    if (!_.isFunction(func)) throw new TypeError;
    args = slice.call(arguments, 2);
    return bound = function() {
      if (!(this instanceof bound)) return func.apply(context, args.concat(slice.call(arguments)));
      ctor.prototype = func.prototype;
      var self = new ctor;
      ctor.prototype = null;
      var result = func.apply(self, args.concat(slice.call(arguments)));
      if (Object(result) === result) return result;
      return self;
    };
  };

  // Partially apply a function by creating a version that has had some of its
  // arguments pre-filled, without changing its dynamic `this` context. _ acts
  // as a placeholder, allowing any combination of arguments to be pre-filled.
  _.partial = function(func) {
    var boundArgs = slice.call(arguments, 1);
    return function() {
      var position = 0;
      var args = boundArgs.slice();
      for (var i = 0, length = args.length; i < length; i++) {
        if (args[i] === _) args[i] = arguments[position++];
      }
      while (position < arguments.length) args.push(arguments[position++]);
      return func.apply(this, args);
    };
  };

  // Bind a number of an object's methods to that object. Remaining arguments
  // are the method names to be bound. Useful for ensuring that all callbacks
  // defined on an object belong to it.
  _.bindAll = function(obj) {
    var funcs = slice.call(arguments, 1);
    if (funcs.length === 0) throw new Error('bindAll must be passed function names');
    each(funcs, function(f) { obj[f] = _.bind(obj[f], obj); });
    return obj;
  };

  // Memoize an expensive function by storing its results.
  _.memoize = function(func, hasher) {
    var memo = {};
    hasher || (hasher = _.identity);
    return function() {
      var key = hasher.apply(this, arguments);
      return _.has(memo, key) ? memo[key] : (memo[key] = func.apply(this, arguments));
    };
  };

  // Delays a function for the given number of milliseconds, and then calls
  // it with the arguments supplied.
  _.delay = function(func, wait) {
    var args = slice.call(arguments, 2);
    return setTimeout(function(){ return func.apply(null, args); }, wait);
  };

  // Defers a function, scheduling it to run after the current call stack has
  // cleared.
  _.defer = function(func) {
    return _.delay.apply(_, [func, 1].concat(slice.call(arguments, 1)));
  };

  // Returns a function, that, when invoked, will only be triggered at most once
  // during a given window of time. Normally, the throttled function will run
  // as much as it can, without ever going more than once per `wait` duration;
  // but if you'd like to disable the execution on the leading edge, pass
  // `{leading: false}`. To disable execution on the trailing edge, ditto.
  _.throttle = function(func, wait, options) {
    var context, args, result;
    var timeout = null;
    var previous = 0;
    options || (options = {});
    var later = function() {
      previous = options.leading === false ? 0 : _.now();
      timeout = null;
      result = func.apply(context, args);
      context = args = null;
    };
    return function() {
      var now = _.now();
      if (!previous && options.leading === false) previous = now;
      var remaining = wait - (now - previous);
      context = this;
      args = arguments;
      if (remaining <= 0) {
        clearTimeout(timeout);
        timeout = null;
        previous = now;
        result = func.apply(context, args);
        context = args = null;
      } else if (!timeout && options.trailing !== false) {
        timeout = setTimeout(later, remaining);
      }
      return result;
    };
  };

  // Returns a function, that, as long as it continues to be invoked, will not
  // be triggered. The function will be called after it stops being called for
  // N milliseconds. If `immediate` is passed, trigger the function on the
  // leading edge, instead of the trailing.
  _.debounce = function(func, wait, immediate) {
    var timeout, args, context, timestamp, result;

    var later = function() {
      var last = _.now() - timestamp;
      if (last < wait) {
        timeout = setTimeout(later, wait - last);
      } else {
        timeout = null;
        if (!immediate) {
          result = func.apply(context, args);
          context = args = null;
        }
      }
    };

    return function() {
      context = this;
      args = arguments;
      timestamp = _.now();
      var callNow = immediate && !timeout;
      if (!timeout) {
        timeout = setTimeout(later, wait);
      }
      if (callNow) {
        result = func.apply(context, args);
        context = args = null;
      }

      return result;
    };
  };

  // Returns a function that will be executed at most one time, no matter how
  // often you call it. Useful for lazy initialization.
  _.once = function(func) {
    var ran = false, memo;
    return function() {
      if (ran) return memo;
      ran = true;
      memo = func.apply(this, arguments);
      func = null;
      return memo;
    };
  };

  // Returns the first function passed as an argument to the second,
  // allowing you to adjust arguments, run code before and after, and
  // conditionally execute the original function.
  _.wrap = function(func, wrapper) {
    return _.partial(wrapper, func);
  };

  // Returns a function that is the composition of a list of functions, each
  // consuming the return value of the function that follows.
  _.compose = function() {
    var funcs = arguments;
    return function() {
      var args = arguments;
      for (var i = funcs.length - 1; i >= 0; i--) {
        args = [funcs[i].apply(this, args)];
      }
      return args[0];
    };
  };

  // Returns a function that will only be executed after being called N times.
  _.after = function(times, func) {
    return function() {
      if (--times < 1) {
        return func.apply(this, arguments);
      }
    };
  };

  // Object Functions
  // ----------------

  // Retrieve the names of an object's properties.
  // Delegates to **ECMAScript 5**'s native `Object.keys`
  _.keys = function(obj) {
    if (!_.isObject(obj)) return [];
    if (nativeKeys) return nativeKeys(obj);
    var keys = [];
    for (var key in obj) if (_.has(obj, key)) keys.push(key);
    return keys;
  };

  // Retrieve the values of an object's properties.
  _.values = function(obj) {
    var keys = _.keys(obj);
    var length = keys.length;
    var values = new Array(length);
    for (var i = 0; i < length; i++) {
      values[i] = obj[keys[i]];
    }
    return values;
  };

  // Convert an object into a list of `[key, value]` pairs.
  _.pairs = function(obj) {
    var keys = _.keys(obj);
    var length = keys.length;
    var pairs = new Array(length);
    for (var i = 0; i < length; i++) {
      pairs[i] = [keys[i], obj[keys[i]]];
    }
    return pairs;
  };

  // Invert the keys and values of an object. The values must be serializable.
  _.invert = function(obj) {
    var result = {};
    var keys = _.keys(obj);
    for (var i = 0, length = keys.length; i < length; i++) {
      result[obj[keys[i]]] = keys[i];
    }
    return result;
  };

  // Return a sorted list of the function names available on the object.
  // Aliased as `methods`
  _.functions = _.methods = function(obj) {
    var names = [];
    for (var key in obj) {
      if (_.isFunction(obj[key])) names.push(key);
    }
    return names.sort();
  };

  // Extend a given object with all the properties in passed-in object(s).
  _.extend = function(obj) {
    each(slice.call(arguments, 1), function(source) {
      if (source) {
        for (var prop in source) {
          obj[prop] = source[prop];
        }
      }
    });
    return obj;
  };

  // Return a copy of the object only containing the whitelisted properties.
  _.pick = function(obj) {
    var copy = {};
    var keys = concat.apply(ArrayProto, slice.call(arguments, 1));
    each(keys, function(key) {
      if (key in obj) copy[key] = obj[key];
    });
    return copy;
  };

   // Return a copy of the object without the blacklisted properties.
  _.omit = function(obj) {
    var copy = {};
    var keys = concat.apply(ArrayProto, slice.call(arguments, 1));
    for (var key in obj) {
      if (!_.contains(keys, key)) copy[key] = obj[key];
    }
    return copy;
  };

  // Fill in a given object with default properties.
  _.defaults = function(obj) {
    each(slice.call(arguments, 1), function(source) {
      if (source) {
        for (var prop in source) {
          if (obj[prop] === void 0) obj[prop] = source[prop];
        }
      }
    });
    return obj;
  };

  // Create a (shallow-cloned) duplicate of an object.
  _.clone = function(obj) {
    if (!_.isObject(obj)) return obj;
    return _.isArray(obj) ? obj.slice() : _.extend({}, obj);
  };

  // Invokes interceptor with the obj, and then returns obj.
  // The primary purpose of this method is to "tap into" a method chain, in
  // order to perform operations on intermediate results within the chain.
  _.tap = function(obj, interceptor) {
    interceptor(obj);
    return obj;
  };

  // Internal recursive comparison function for `isEqual`.
  var eq = function(a, b, aStack, bStack) {
    // Identical objects are equal. `0 === -0`, but they aren't identical.
    // See the [Harmony `egal` proposal](http://wiki.ecmascript.org/doku.php?id=harmony:egal).
    if (a === b) return a !== 0 || 1 / a == 1 / b;
    // A strict comparison is necessary because `null == undefined`.
    if (a == null || b == null) return a === b;
    // Unwrap any wrapped objects.
    if (a instanceof _) a = a._wrapped;
    if (b instanceof _) b = b._wrapped;
    // Compare `[[Class]]` names.
    var className = toString.call(a);
    if (className != toString.call(b)) return false;
    switch (className) {
      // Strings, numbers, dates, and booleans are compared by value.
      case '[object String]':
        // Primitives and their corresponding object wrappers are equivalent; thus, `"5"` is
        // equivalent to `new String("5")`.
        return a == String(b);
      case '[object Number]':
        // `NaN`s are equivalent, but non-reflexive. An `egal` comparison is performed for
        // other numeric values.
        return a != +a ? b != +b : (a == 0 ? 1 / a == 1 / b : a == +b);
      case '[object Date]':
      case '[object Boolean]':
        // Coerce dates and booleans to numeric primitive values. Dates are compared by their
        // millisecond representations. Note that invalid dates with millisecond representations
        // of `NaN` are not equivalent.
        return +a == +b;
      // RegExps are compared by their source patterns and flags.
      case '[object RegExp]':
        return a.source == b.source &&
               a.global == b.global &&
               a.multiline == b.multiline &&
               a.ignoreCase == b.ignoreCase;
    }
    if (typeof a != 'object' || typeof b != 'object') return false;
    // Assume equality for cyclic structures. The algorithm for detecting cyclic
    // structures is adapted from ES 5.1 section 15.12.3, abstract operation `JO`.
    var length = aStack.length;
    while (length--) {
      // Linear search. Performance is inversely proportional to the number of
      // unique nested structures.
      if (aStack[length] == a) return bStack[length] == b;
    }
    // Objects with different constructors are not equivalent, but `Object`s
    // from different frames are.
    var aCtor = a.constructor, bCtor = b.constructor;
    if (aCtor !== bCtor && !(_.isFunction(aCtor) && (aCtor instanceof aCtor) &&
                             _.isFunction(bCtor) && (bCtor instanceof bCtor))
                        && ('constructor' in a && 'constructor' in b)) {
      return false;
    }
    // Add the first object to the stack of traversed objects.
    aStack.push(a);
    bStack.push(b);
    var size = 0, result = true;
    // Recursively compare objects and arrays.
    if (className == '[object Array]') {
      // Compare array lengths to determine if a deep comparison is necessary.
      size = a.length;
      result = size == b.length;
      if (result) {
        // Deep compare the contents, ignoring non-numeric properties.
        while (size--) {
          if (!(result = eq(a[size], b[size], aStack, bStack))) break;
        }
      }
    } else {
      // Deep compare objects.
      for (var key in a) {
        if (_.has(a, key)) {
          // Count the expected number of properties.
          size++;
          // Deep compare each member.
          if (!(result = _.has(b, key) && eq(a[key], b[key], aStack, bStack))) break;
        }
      }
      // Ensure that both objects contain the same number of properties.
      if (result) {
        for (key in b) {
          if (_.has(b, key) && !(size--)) break;
        }
        result = !size;
      }
    }
    // Remove the first object from the stack of traversed objects.
    aStack.pop();
    bStack.pop();
    return result;
  };

  // Perform a deep comparison to check if two objects are equal.
  _.isEqual = function(a, b) {
    return eq(a, b, [], []);
  };

  // Is a given array, string, or object empty?
  // An "empty" object has no enumerable own-properties.
  _.isEmpty = function(obj) {
    if (obj == null) return true;
    if (_.isArray(obj) || _.isString(obj)) return obj.length === 0;
    for (var key in obj) if (_.has(obj, key)) return false;
    return true;
  };

  // Is a given value a DOM element?
  _.isElement = function(obj) {
    return !!(obj && obj.nodeType === 1);
  };

  // Is a given value an array?
  // Delegates to ECMA5's native Array.isArray
  _.isArray = nativeIsArray || function(obj) {
    return toString.call(obj) == '[object Array]';
  };

  // Is a given variable an object?
  _.isObject = function(obj) {
    return obj === Object(obj);
  };

  // Add some isType methods: isArguments, isFunction, isString, isNumber, isDate, isRegExp.
  each(['Arguments', 'Function', 'String', 'Number', 'Date', 'RegExp'], function(name) {
    _['is' + name] = function(obj) {
      return toString.call(obj) == '[object ' + name + ']';
    };
  });

  // Define a fallback version of the method in browsers (ahem, IE), where
  // there isn't any inspectable "Arguments" type.
  if (!_.isArguments(arguments)) {
    _.isArguments = function(obj) {
      return !!(obj && _.has(obj, 'callee'));
    };
  }

  // Optimize `isFunction` if appropriate.
  if (typeof (/./) !== 'function') {
    _.isFunction = function(obj) {
      return typeof obj === 'function';
    };
  }

  // Is a given object a finite number?
  _.isFinite = function(obj) {
    return isFinite(obj) && !isNaN(parseFloat(obj));
  };

  // Is the given value `NaN`? (NaN is the only number which does not equal itself).
  _.isNaN = function(obj) {
    return _.isNumber(obj) && obj != +obj;
  };

  // Is a given value a boolean?
  _.isBoolean = function(obj) {
    return obj === true || obj === false || toString.call(obj) == '[object Boolean]';
  };

  // Is a given value equal to null?
  _.isNull = function(obj) {
    return obj === null;
  };

  // Is a given variable undefined?
  _.isUndefined = function(obj) {
    return obj === void 0;
  };

  // Shortcut function for checking if an object has a given property directly
  // on itself (in other words, not on a prototype).
  _.has = function(obj, key) {
    return hasOwnProperty.call(obj, key);
  };

  // Utility Functions
  // -----------------

  // Run Underscore.js in *noConflict* mode, returning the `_` variable to its
  // previous owner. Returns a reference to the Underscore object.
  _.noConflict = function() {
    root._ = previousUnderscore;
    return this;
  };

  // Keep the identity function around for default iterators.
  _.identity = function(value) {
    return value;
  };

  _.constant = function(value) {
    return function () {
      return value;
    };
  };

  _.property = function(key) {
    return function(obj) {
      return obj[key];
    };
  };

  // Returns a predicate for checking whether an object has a given set of `key:value` pairs.
  _.matches = function(attrs) {
    return function(obj) {
      if (obj === attrs) return true; //avoid comparing an object to itself.
      for (var key in attrs) {
        if (attrs[key] !== obj[key])
          return false;
      }
      return true;
    }
  };

  // Run a function **n** times.
  _.times = function(n, iterator, context) {
    var accum = Array(Math.max(0, n));
    for (var i = 0; i < n; i++) accum[i] = iterator.call(context, i);
    return accum;
  };

  // Return a random integer between min and max (inclusive).
  _.random = function(min, max) {
    if (max == null) {
      max = min;
      min = 0;
    }
    return min + Math.floor(Math.random() * (max - min + 1));
  };

  // A (possibly faster) way to get the current timestamp as an integer.
  _.now = Date.now || function() { return new Date().getTime(); };

  // List of HTML entities for escaping.
  var entityMap = {
    escape: {
      '&': '&amp;',
      '<': '&lt;',
      '>': '&gt;',
      '"': '&quot;',
      "'": '&#x27;'
    }
  };
  entityMap.unescape = _.invert(entityMap.escape);

  // Regexes containing the keys and values listed immediately above.
  var entityRegexes = {
    escape:   new RegExp('[' + _.keys(entityMap.escape).join('') + ']', 'g'),
    unescape: new RegExp('(' + _.keys(entityMap.unescape).join('|') + ')', 'g')
  };

  // Functions for escaping and unescaping strings to/from HTML interpolation.
  _.each(['escape', 'unescape'], function(method) {
    _[method] = function(string) {
      if (string == null) return '';
      return ('' + string).replace(entityRegexes[method], function(match) {
        return entityMap[method][match];
      });
    };
  });

  // If the value of the named `property` is a function then invoke it with the
  // `object` as context; otherwise, return it.
  _.result = function(object, property) {
    if (object == null) return void 0;
    var value = object[property];
    return _.isFunction(value) ? value.call(object) : value;
  };

  // Add your own custom functions to the Underscore object.
  _.mixin = function(obj) {
    each(_.functions(obj), function(name) {
      var func = _[name] = obj[name];
      _.prototype[name] = function() {
        var args = [this._wrapped];
        push.apply(args, arguments);
        return result.call(this, func.apply(_, args));
      };
    });
  };

  // Generate a unique integer id (unique within the entire client session).
  // Useful for temporary DOM ids.
  var idCounter = 0;
  _.uniqueId = function(prefix) {
    var id = ++idCounter + '';
    return prefix ? prefix + id : id;
  };

  // By default, Underscore uses ERB-style template delimiters, change the
  // following template settings to use alternative delimiters.
  _.templateSettings = {
    evaluate    : /<%([\s\S]+?)%>/g,
    interpolate : /<%=([\s\S]+?)%>/g,
    escape      : /<%-([\s\S]+?)%>/g
  };

  // When customizing `templateSettings`, if you don't want to define an
  // interpolation, evaluation or escaping regex, we need one that is
  // guaranteed not to match.
  var noMatch = /(.)^/;

  // Certain characters need to be escaped so that they can be put into a
  // string literal.
  var escapes = {
    "'":      "'",
    '\\':     '\\',
    '\r':     'r',
    '\n':     'n',
    '\t':     't',
    '\u2028': 'u2028',
    '\u2029': 'u2029'
  };

  var escaper = /\\|'|\r|\n|\t|\u2028|\u2029/g;

  // JavaScript micro-templating, similar to John Resig's implementation.
  // Underscore templating handles arbitrary delimiters, preserves whitespace,
  // and correctly escapes quotes within interpolated code.
  _.template = function(text, data, settings) {
    var render;
    settings = _.defaults({}, settings, _.templateSettings);

    // Combine delimiters into one regular expression via alternation.
    var matcher = new RegExp([
      (settings.escape || noMatch).source,
      (settings.interpolate || noMatch).source,
      (settings.evaluate || noMatch).source
    ].join('|') + '|$', 'g');

    // Compile the template source, escaping string literals appropriately.
    var index = 0;
    var source = "__p+='";
    text.replace(matcher, function(match, escape, interpolate, evaluate, offset) {
      source += text.slice(index, offset)
        .replace(escaper, function(match) { return '\\' + escapes[match]; });

      if (escape) {
        source += "'+\n((__t=(" + escape + "))==null?'':_.escape(__t))+\n'";
      }
      if (interpolate) {
        source += "'+\n((__t=(" + interpolate + "))==null?'':__t)+\n'";
      }
      if (evaluate) {
        source += "';\n" + evaluate + "\n__p+='";
      }
      index = offset + match.length;
      return match;
    });
    source += "';\n";

    // If a variable is not specified, place data values in local scope.
    if (!settings.variable) source = 'with(obj||{}){\n' + source + '}\n';

    source = "var __t,__p='',__j=Array.prototype.join," +
      "print=function(){__p+=__j.call(arguments,'');};\n" +
      source + "return __p;\n";

    try {
      render = new Function(settings.variable || 'obj', '_', source);
    } catch (e) {
      e.source = source;
      throw e;
    }

    if (data) return render(data, _);
    var template = function(data) {
      return render.call(this, data, _);
    };

    // Provide the compiled function source as a convenience for precompilation.
    template.source = 'function(' + (settings.variable || 'obj') + '){\n' + source + '}';

    return template;
  };

  // Add a "chain" function, which will delegate to the wrapper.
  _.chain = function(obj) {
    return _(obj).chain();
  };

  // OOP
  // ---------------
  // If Underscore is called as a function, it returns a wrapped object that
  // can be used OO-style. This wrapper holds altered versions of all the
  // underscore functions. Wrapped objects may be chained.

  // Helper function to continue chaining intermediate results.
  var result = function(obj) {
    return this._chain ? _(obj).chain() : obj;
  };

  // Add all of the Underscore functions to the wrapper object.
  _.mixin(_);

  // Add all mutator Array functions to the wrapper.
  each(['pop', 'push', 'reverse', 'shift', 'sort', 'splice', 'unshift'], function(name) {
    var method = ArrayProto[name];
    _.prototype[name] = function() {
      var obj = this._wrapped;
      method.apply(obj, arguments);
      if ((name == 'shift' || name == 'splice') && obj.length === 0) delete obj[0];
      return result.call(this, obj);
    };
  });

  // Add all accessor Array functions to the wrapper.
  each(['concat', 'join', 'slice'], function(name) {
    var method = ArrayProto[name];
    _.prototype[name] = function() {
      return result.call(this, method.apply(this._wrapped, arguments));
    };
  });

  _.extend(_.prototype, {

    // Start chaining a wrapped Underscore object.
    chain: function() {
      this._chain = true;
      return this;
    },

    // Extracts the result from a wrapped and chained object.
    value: function() {
      return this._wrapped;
    }

  });

  // AMD registration happens at the end for compatibility with AMD loaders
  // that may not enforce next-turn semantics on modules. Even though general
  // practice for AMD registration is to be anonymous, underscore registers
  // as a named module because, like jQuery, it is a base library that is
  // popular enough to be bundled in a third party lib, but not be part of
  // an AMD load request. Those cases could generate an error when an
  // anonymous define() is called outside of a loader request.
  if (typeof define === 'function' && define.amd) {
    define('underscore', [], function() {
      return _;
    });
  }
}).call(this);

},{}],13:[function(require,module,exports){
/*
WildEmitter.js is a slim little event emitter by @henrikjoreteg largely based 
on @visionmedia's Emitter from UI Kit.

Why? I wanted it standalone.

I also wanted support for wildcard emitters like this:

emitter.on('*', function (eventName, other, event, payloads) {
    
});

emitter.on('somenamespace*', function (eventName, payloads) {
    
});

Please note that callbacks triggered by wildcard registered events also get 
the event name as the first argument.
*/
module.exports = WildEmitter;

function WildEmitter() {
    this.callbacks = {};
}

// Listen on the given `event` with `fn`. Store a group name if present.
WildEmitter.prototype.on = function (event, groupName, fn) {
    var hasGroup = (arguments.length === 3),
        group = hasGroup ? arguments[1] : undefined,
        func = hasGroup ? arguments[2] : arguments[1];
    func._groupName = group;
    (this.callbacks[event] = this.callbacks[event] || []).push(func);
    return this;
};

// Adds an `event` listener that will be invoked a single
// time then automatically removed.
WildEmitter.prototype.once = function (event, groupName, fn) {
    var self = this,
        hasGroup = (arguments.length === 3),
        group = hasGroup ? arguments[1] : undefined,
        func = hasGroup ? arguments[2] : arguments[1];
    function on() {
        self.off(event, on);
        func.apply(this, arguments);
    }
    this.on(event, group, on);
    return this;
};

// Unbinds an entire group
WildEmitter.prototype.releaseGroup = function (groupName) {
    var item, i, len, handlers;
    for (item in this.callbacks) {
        handlers = this.callbacks[item];
        for (i = 0, len = handlers.length; i < len; i++) {
            if (handlers[i]._groupName === groupName) {
                //console.log('removing');
                // remove it and shorten the array we're looping through
                handlers.splice(i, 1);
                i--;
                len--;
            }
        }
    }
    return this;
};

// Remove the given callback for `event` or all
// registered callbacks.
WildEmitter.prototype.off = function (event, fn) {
    var callbacks = this.callbacks[event],
        i;

    if (!callbacks) return this;

    // remove all handlers
    if (arguments.length === 1) {
        delete this.callbacks[event];
        return this;
    }

    // remove specific handler
    i = callbacks.indexOf(fn);
    callbacks.splice(i, 1);
    return this;
};

/// Emit `event` with the given args.
// also calls any `*` handlers
WildEmitter.prototype.emit = function (event) {
    var args = [].slice.call(arguments, 1),
        callbacks = this.callbacks[event],
        specialCallbacks = this.getWildcardCallbacks(event),
        i,
        len,
        item,
        listeners;

    if (callbacks) {
        listeners = callbacks.slice();
        for (i = 0, len = listeners.length; i < len; ++i) {
            if (listeners[i]) {
                listeners[i].apply(this, args);
            } else {
                break;
            }
        }
    }

    if (specialCallbacks) {
        len = specialCallbacks.length;
        listeners = specialCallbacks.slice();
        for (i = 0, len = listeners.length; i < len; ++i) {
            if (listeners[i]) {
                listeners[i].apply(this, [event].concat(args));
            } else {
                break;
            }
        }
    }

    return this;
};

// Helper for for finding special wildcard event handlers that match the event
WildEmitter.prototype.getWildcardCallbacks = function (eventName) {
    var item,
        split,
        result = [];

    for (item in this.callbacks) {
        split = item.split('*');
        if (item === '*' || (split.length === 2 && eventName.slice(0, split[0].length) === split[0])) {
            result = result.concat(this.callbacks[item]);
        }
    }
    return result;
};

},{}],9:[function(require,module,exports){
/*
WildEmitter.js is a slim little event emitter by @henrikjoreteg largely based 
on @visionmedia's Emitter from UI Kit.

Why? I wanted it standalone.

I also wanted support for wildcard emitters like this:

emitter.on('*', function (eventName, other, event, payloads) {
    
});

emitter.on('somenamespace*', function (eventName, payloads) {
    
});

Please note that callbacks triggered by wildcard registered events also get 
the event name as the first argument.
*/
module.exports = WildEmitter;

function WildEmitter() {
    this.callbacks = {};
}

// Listen on the given `event` with `fn`. Store a group name if present.
WildEmitter.prototype.on = function (event, groupName, fn) {
    var hasGroup = (arguments.length === 3),
        group = hasGroup ? arguments[1] : undefined, 
        func = hasGroup ? arguments[2] : arguments[1];
    func._groupName = group;
    (this.callbacks[event] = this.callbacks[event] || []).push(func);
    return this;
};

// Adds an `event` listener that will be invoked a single
// time then automatically removed.
WildEmitter.prototype.once = function (event, groupName, fn) {
    var self = this,
        hasGroup = (arguments.length === 3),
        group = hasGroup ? arguments[1] : undefined, 
        func = hasGroup ? arguments[2] : arguments[1];
    function on() {
        self.off(event, on);
        func.apply(this, arguments);
    }
    this.on(event, group, on);
    return this;
};

// Unbinds an entire group
WildEmitter.prototype.releaseGroup = function (groupName) {
    var item, i, len, handlers;
    for (item in this.callbacks) {
        handlers = this.callbacks[item];
        for (i = 0, len = handlers.length; i < len; i++) {
            if (handlers[i]._groupName === groupName) {
                //console.log('removing');
                // remove it and shorten the array we're looping through
                handlers.splice(i, 1);
                i--;
                len--;
            }
        }
    }
    return this;
};

// Remove the given callback for `event` or all
// registered callbacks.
WildEmitter.prototype.off = function (event, fn) {
    var callbacks = this.callbacks[event],
        i;
    
    if (!callbacks) return this;

    // remove all handlers
    if (arguments.length === 1) {
        delete this.callbacks[event];
        return this;
    }

    // remove specific handler
    i = callbacks.indexOf(fn);
    callbacks.splice(i, 1);
    return this;
};

// Emit `event` with the given args.
// also calls any `*` handlers
WildEmitter.prototype.emit = function (event) {
    var args = [].slice.call(arguments, 1),
        callbacks = this.callbacks[event],
        specialCallbacks = this.getWildcardCallbacks(event),
        i,
        len,
        item;

    if (callbacks) {
        for (i = 0, len = callbacks.length; i < len; ++i) {
            if (callbacks[i]) {
                callbacks[i].apply(this, args);
            } else {
                break;
            }
        }
    }

    if (specialCallbacks) {
        for (i = 0, len = specialCallbacks.length; i < len; ++i) {
            if (specialCallbacks[i]) {
                specialCallbacks[i].apply(this, [event].concat(args));
            } else {
                break;
            }
        }
    }

    return this;
};

// Helper for for finding special wildcard event handlers that match the event
WildEmitter.prototype.getWildcardCallbacks = function (eventName) {
    var item,
        split,
        result = [];

    for (item in this.callbacks) {
        split = item.split('*');
        if (item === '*' || (split.length === 2 && eventName.slice(0, split[1].length) === split[1])) {
            result = result.concat(this.callbacks[item]);
        }
    }
    return result;
};

},{}],4:[function(require,module,exports){
var _ = require('underscore');
var util = require('util');
var webrtc = require('webrtcsupport');
var SJJ = require('sdp-jingle-json');
var WildEmitter = require('wildemitter');
var peerconn = require('traceablepeerconnection');

function PeerConnection(config, constraints) {
    var self = this;
    var item;
    WildEmitter.call(this);

    config = config || {};
    config.iceServers = config.iceServers || [];

    this.pc = new peerconn(config, constraints);
    // proxy events 
    this.pc.on('*', function () {
        self.emit.apply(self, arguments);
    });

    // proxy some events directly
    this.pc.onremovestream = this.emit.bind(this, 'removeStream');
    this.pc.onnegotiationneeded = this.emit.bind(this, 'negotiationNeeded');
    this.pc.oniceconnectionstatechange = this.emit.bind(this, 'iceConnectionStateChange');
    this.pc.onsignalingstatechange = this.emit.bind(this, 'signalingStateChange');

    // handle incoming ice and data channel events
    this.pc.onaddstream = this._onAddStream.bind(this);
    this.pc.onicecandidate = this._onIce.bind(this);
    this.pc.ondatachannel = this._onDataChannel.bind(this);

    this.localDescription = {
        contents: []
    };
    this.remoteDescription = {
        contents: []
    };

    this.localStream = null;
    this.remoteStreams = [];

    this.config = {
        debug: false,
        ice: {},
        sid: '',
        isInitiator: true,
        sdpSessionID: Date.now(),
        useJingle: false
    };

    // apply our config
    for (item in config) {
        this.config[item] = config[item];
    }

    if (this.config.debug) {
        this.on('*', function (eventName, event) {
            var logger = config.logger || console;
            logger.log('PeerConnection event:', arguments);
        });
    }
}

util.inherits(PeerConnection, WildEmitter);

PeerConnection.prototype.__defineGetter__('signalingState', function () {
    return this.pc.signalingState;
});
PeerConnection.prototype.__defineGetter__('iceConnectionState', function () {
    return this.pc.iceConnectionState;
});

// Add a stream to the peer connection object
PeerConnection.prototype.addStream = function (stream) {
    this.localStream = stream;
    this.pc.addStream(stream);
};


// Init and add ice candidate object with correct constructor
PeerConnection.prototype.processIce = function (update, cb) {
    cb = cb || function () {};
    var self = this;

    if (update.contents) {
        var contentNames = _.pluck(this.remoteDescription.contents, 'name');
        var contents = update.contents;

        contents.forEach(function (content) {
            var transport = content.transport || {};
            var candidates = transport.candidates || [];
            var mline = contentNames.indexOf(content.name);
            var mid = content.name;

            candidates.forEach(function (candidate) {
                console.log('addicecandidate');
                var iceCandidate = SJJ.toCandidateSDP(candidate) + '\r\n';
                self.pc.addIceCandidate(new webrtc.IceCandidate({
                    candidate: iceCandidate,
                    sdpMLineIndex: mline,
                    sdpMid: mid
                })
                /* not yet, breaks Chrome M32 */
                /*
                , function () {
                    // well, this success callback is pretty meaningless
                },
                function (err) {
                    self.emit('error', err);
                }
                */
                );
            });
        });
    } else {
        self.pc.addIceCandidate(new webrtc.IceCandidate(update.candidate));
    }
    cb();
};

// Generate and emit an offer with the given constraints
PeerConnection.prototype.offer = function (constraints, cb) {
    var self = this;
    var hasConstraints = arguments.length === 2;
    var mediaConstraints = hasConstraints ? constraints : {
            mandatory: {
                OfferToReceiveAudio: true,
                OfferToReceiveVideo: true
            }
        };
    cb = hasConstraints ? cb : constraints;
    cb = cb || function () {};

    // Actually generate the offer
    this.pc.createOffer(
        function (offer) {
            self.pc.setLocalDescription(offer,
                function () {
                    var jingle;
                    var expandedOffer = {
                        type: 'offer',
                        sdp: offer.sdp
                    };
                    if (self.config.useJingle) {
                        jingle = SJJ.toSessionJSON(offer.sdp, self.config.isInitiator ? 'initiator' : 'responder');
                        jingle.sid = self.config.sid;
                        self.localDescription = jingle;

                        // Save ICE credentials
                        _.each(jingle.contents, function (content) {
                            var transport = content.transport || {};
                            if (transport.ufrag) {
                                self.config.ice[content.name] = {
                                    ufrag: transport.ufrag,
                                    pwd: transport.pwd
                                };
                            }
                        });

                        expandedOffer.jingle = jingle;
                    }

                    self.emit('offer', expandedOffer);
                    cb(null, expandedOffer);
                },
                function (err) {
                    self.emit('error', err);
                    cb(err);
                }
            );
        },
        function (err) {
            self.emit('error', err);
            cb(err);
        },
        mediaConstraints
    );
};


// Process an incoming offer so that ICE may proceed before deciding
// to answer the request.
PeerConnection.prototype.handleOffer = function (offer, cb) {
    cb = cb || function () {};
    var self = this;
    offer.type = 'offer';
    if (offer.jingle) {
        offer.sdp = SJJ.toSessionSDP(offer.jingle, self.config.sdpSessionID);
    }
    self.pc.setRemoteDescription(new webrtc.SessionDescription(offer), function () {
        cb();
    }, cb);
};

// Answer an offer with audio only
PeerConnection.prototype.answerAudioOnly = function (cb) {
    var mediaConstraints = {
            mandatory: {
                OfferToReceiveAudio: true,
                OfferToReceiveVideo: false
            }
        };
    this._answer(mediaConstraints, cb);
};

// Answer an offer without offering to recieve
PeerConnection.prototype.answerBroadcastOnly = function (cb) {
    var mediaConstraints = {
            mandatory: {
                OfferToReceiveAudio: false,
                OfferToReceiveVideo: false
            }
        };
    this._answer(mediaConstraints, cb);
};

// Answer an offer with given constraints default is audio/video
PeerConnection.prototype.answer = function (constraints, cb) {
    var self = this;
    var hasConstraints = arguments.length === 2;
    var callback = hasConstraints ? cb : constraints;
    var mediaConstraints = hasConstraints ? constraints : {
            mandatory: {
                OfferToReceiveAudio: true,
                OfferToReceiveVideo: true
            }
        };

    this._answer(mediaConstraints, callback);
};

// Process an answer
PeerConnection.prototype.handleAnswer = function (answer, cb) {
    cb = cb || function () {};
    var self = this;
    if (answer.jingle) {
        answer.sdp = SJJ.toSessionSDP(answer.jingle, self.config.sdpSessionID);
        self.remoteDescription = answer.jingle;
    }
    self.pc.setRemoteDescription(
        new webrtc.SessionDescription(answer),
        function () {
            cb(null);
        },
        cb
    );
};

// Close the peer connection
PeerConnection.prototype.close = function () {
    this.pc.close();
    this.emit('close');
};

// Internal code sharing for various types of answer methods
PeerConnection.prototype._answer = function (constraints, cb) {
    cb = cb || function () {};
    var self = this;
    if (!this.pc.remoteDescription) {
        // the old API is used, call handleOffer
        throw new Error('remoteDescription not set');
    }
    self.pc.createAnswer(
        function (answer) {
            self.pc.setLocalDescription(answer,
                function () {
                    var expandedAnswer = {
                        type: 'answer',
                        sdp: answer.sdp
                    };
                    if (self.config.useJingle) {
                        var jingle = SJJ.toSessionJSON(answer.sdp);
                        jingle.sid = self.config.sid;
                        self.localDescription = jingle;
                        expandedAnswer.jingle = jingle;
                    }
                    self.emit('answer', expandedAnswer);
                    cb(null, expandedAnswer);
                },
                function (err) {
                    self.emit('error', err);
                    cb(err);
                }
            );
        },
        function (err) {
            self.emit('error', err);
            cb(err);
        },
        constraints
    );
};

// Internal method for emitting ice candidates on our peer object
PeerConnection.prototype._onIce = function (event) {
    var self = this;
    if (event.candidate) {
        var ice = event.candidate;

        var expandedCandidate = {
            candidate: event.candidate
        };

        if (self.config.useJingle) {
            if (!self.config.ice[ice.sdpMid]) {
                var jingle = SJJ.toSessionJSON(self.pc.localDescription.sdp, self.config.isInitiator ? 'initiator' : 'responder');
                _.each(jingle.contents, function (content) {
                    var transport = content.transport || {};
                    if (transport.ufrag) {
                        self.config.ice[content.name] = {
                            ufrag: transport.ufrag,
                            pwd: transport.pwd
                        };
                    }
                });
            }
            expandedCandidate.jingle = {
                contents: [{
                    name: ice.sdpMid,
                    creator: self.config.isInitiator ? 'initiator' : 'responder',
                    transport: {
                        transType: 'iceUdp',
                        ufrag: self.config.ice[ice.sdpMid].ufrag,
                        pwd: self.config.ice[ice.sdpMid].pwd,
                        candidates: [
                            SJJ.toCandidateJSON(ice.candidate)
                        ]
                    }
                }]
            };
        }

        this.emit('ice', expandedCandidate);
    } else {
        this.emit('endOfCandidates');
    }
};

// Internal method for processing a new data channel being added by the
// other peer.
PeerConnection.prototype._onDataChannel = function (event) {
    this.emit('addChannel', event.channel);
};

// Internal handling of adding stream
PeerConnection.prototype._onAddStream = function (event) {
    this.remoteStreams.push(event.stream);
    this.emit('addStream', event);
};

// Create a data channel spec reference:
// http://dev.w3.org/2011/webrtc/editor/webrtc.html#idl-def-RTCDataChannelInit
PeerConnection.prototype.createDataChannel = function (name, opts) {
    var channel = this.pc.createDataChannel(name, opts);
    return channel;
};

module.exports = PeerConnection;

},{"sdp-jingle-json":15,"traceablepeerconnection":14,"underscore":12,"util":10,"webrtcsupport":2,"wildemitter":13}],7:[function(require,module,exports){
var support = require('webrtcsupport');


function GainController(stream) {
    this.support = support.webAudio && support.mediaStream;

    // set our starting value
    this.gain = 1;

    if (this.support) {
        var context = this.context = new support.AudioContext();
        this.microphone = context.createMediaStreamSource(stream);
        this.gainFilter = context.createGain();
        this.destination = context.createMediaStreamDestination();
        this.outputStream = this.destination.stream;
        this.microphone.connect(this.gainFilter);
        this.gainFilter.connect(this.destination);
        stream.removeTrack(stream.getAudioTracks()[0]);
        stream.addTrack(this.outputStream.getAudioTracks()[0]);
    }
    this.stream = stream;
}

// setting
GainController.prototype.setGain = function (val) {
    // check for support
    if (!this.support) return;
    this.gainFilter.gain.value = val;
    this.gain = val;
};

GainController.prototype.getGain = function () {
    return this.gain;
};

GainController.prototype.off = function () {
    return this.setGain(0);
};

GainController.prototype.on = function () {
    this.setGain(1);
};


module.exports = GainController;

},{"webrtcsupport":2}],16:[function(require,module,exports){
// shim for using process in browser

var process = module.exports = {};

process.nextTick = (function () {
    var canSetImmediate = typeof window !== 'undefined'
    && window.setImmediate;
    var canPost = typeof window !== 'undefined'
    && window.postMessage && window.addEventListener
    ;

    if (canSetImmediate) {
        return function (f) { return window.setImmediate(f) };
    }

    if (canPost) {
        var queue = [];
        window.addEventListener('message', function (ev) {
            var source = ev.source;
            if ((source === window || source === null) && ev.data === 'process-tick') {
                ev.stopPropagation();
                if (queue.length > 0) {
                    var fn = queue.shift();
                    fn();
                }
            }
        }, true);

        return function nextTick(fn) {
            queue.push(fn);
            window.postMessage('process-tick', '*');
        };
    }

    return function nextTick(fn) {
        setTimeout(fn, 0);
    };
})();

process.title = 'browser';
process.browser = true;
process.env = {};
process.argv = [];

process.binding = function (name) {
    throw new Error('process.binding is not supported');
}

// TODO(shtylman)
process.cwd = function () { return '/' };
process.chdir = function (dir) {
    throw new Error('process.chdir is not supported');
};

},{}],11:[function(require,module,exports){
var process=require("__browserify_process");if (!process.EventEmitter) process.EventEmitter = function () {};

var EventEmitter = exports.EventEmitter = process.EventEmitter;
var isArray = typeof Array.isArray === 'function'
    ? Array.isArray
    : function (xs) {
        return Object.prototype.toString.call(xs) === '[object Array]'
    }
;
function indexOf (xs, x) {
    if (xs.indexOf) return xs.indexOf(x);
    for (var i = 0; i < xs.length; i++) {
        if (x === xs[i]) return i;
    }
    return -1;
}

// By default EventEmitters will print a warning if more than
// 10 listeners are added to it. This is a useful default which
// helps finding memory leaks.
//
// Obviously not all Emitters should be limited to 10. This function allows
// that to be increased. Set to zero for unlimited.
var defaultMaxListeners = 10;
EventEmitter.prototype.setMaxListeners = function(n) {
  if (!this._events) this._events = {};
  this._events.maxListeners = n;
};


EventEmitter.prototype.emit = function(type) {
  // If there is no 'error' event listener then throw.
  if (type === 'error') {
    if (!this._events || !this._events.error ||
        (isArray(this._events.error) && !this._events.error.length))
    {
      if (arguments[1] instanceof Error) {
        throw arguments[1]; // Unhandled 'error' event
      } else {
        throw new Error("Uncaught, unspecified 'error' event.");
      }
      return false;
    }
  }

  if (!this._events) return false;
  var handler = this._events[type];
  if (!handler) return false;

  if (typeof handler == 'function') {
    switch (arguments.length) {
      // fast cases
      case 1:
        handler.call(this);
        break;
      case 2:
        handler.call(this, arguments[1]);
        break;
      case 3:
        handler.call(this, arguments[1], arguments[2]);
        break;
      // slower
      default:
        var args = Array.prototype.slice.call(arguments, 1);
        handler.apply(this, args);
    }
    return true;

  } else if (isArray(handler)) {
    var args = Array.prototype.slice.call(arguments, 1);

    var listeners = handler.slice();
    for (var i = 0, l = listeners.length; i < l; i++) {
      listeners[i].apply(this, args);
    }
    return true;

  } else {
    return false;
  }
};

// EventEmitter is defined in src/node_events.cc
// EventEmitter.prototype.emit() is also defined there.
EventEmitter.prototype.addListener = function(type, listener) {
  if ('function' !== typeof listener) {
    throw new Error('addListener only takes instances of Function');
  }

  if (!this._events) this._events = {};

  // To avoid recursion in the case that type == "newListeners"! Before
  // adding it to the listeners, first emit "newListeners".
  this.emit('newListener', type, listener);

  if (!this._events[type]) {
    // Optimize the case of one listener. Don't need the extra array object.
    this._events[type] = listener;
  } else if (isArray(this._events[type])) {

    // Check for listener leak
    if (!this._events[type].warned) {
      var m;
      if (this._events.maxListeners !== undefined) {
        m = this._events.maxListeners;
      } else {
        m = defaultMaxListeners;
      }

      if (m && m > 0 && this._events[type].length > m) {
        this._events[type].warned = true;
        console.error('(node) warning: possible EventEmitter memory ' +
                      'leak detected. %d listeners added. ' +
                      'Use emitter.setMaxListeners() to increase limit.',
                      this._events[type].length);
        console.trace();
      }
    }

    // If we've already got an array, just append.
    this._events[type].push(listener);
  } else {
    // Adding the second element, need to change to array.
    this._events[type] = [this._events[type], listener];
  }

  return this;
};

EventEmitter.prototype.on = EventEmitter.prototype.addListener;

EventEmitter.prototype.once = function(type, listener) {
  var self = this;
  self.on(type, function g() {
    self.removeListener(type, g);
    listener.apply(this, arguments);
  });

  return this;
};

EventEmitter.prototype.removeListener = function(type, listener) {
  if ('function' !== typeof listener) {
    throw new Error('removeListener only takes instances of Function');
  }

  // does not use listeners(), so no side effect of creating _events[type]
  if (!this._events || !this._events[type]) return this;

  var list = this._events[type];

  if (isArray(list)) {
    var i = indexOf(list, listener);
    if (i < 0) return this;
    list.splice(i, 1);
    if (list.length == 0)
      delete this._events[type];
  } else if (this._events[type] === listener) {
    delete this._events[type];
  }

  return this;
};

EventEmitter.prototype.removeAllListeners = function(type) {
  if (arguments.length === 0) {
    this._events = {};
    return this;
  }

  // does not use listeners(), so no side effect of creating _events[type]
  if (type && this._events && this._events[type]) this._events[type] = null;
  return this;
};

EventEmitter.prototype.listeners = function(type) {
  if (!this._events) this._events = {};
  if (!this._events[type]) this._events[type] = [];
  if (!isArray(this._events[type])) {
    this._events[type] = [this._events[type]];
  }
  return this._events[type];
};

EventEmitter.listenerCount = function(emitter, type) {
  var ret;
  if (!emitter._events || !emitter._events[type])
    ret = 0;
  else if (typeof emitter._events[type] === 'function')
    ret = 1;
  else
    ret = emitter._events[type].length;
  return ret;
};

},{"__browserify_process":16}],15:[function(require,module,exports){
var tosdp = require('./lib/tosdp');
var tojson = require('./lib/tojson');


exports.toSessionSDP = tosdp.toSessionSDP;
exports.toMediaSDP = tosdp.toMediaSDP;
exports.toCandidateSDP = tosdp.toCandidateSDP;

exports.toSessionJSON = tojson.toSessionJSON;
exports.toMediaJSON = tojson.toMediaJSON;
exports.toCandidateJSON = tojson.toCandidateJSON;

},{"./lib/tojson":18,"./lib/tosdp":17}],17:[function(require,module,exports){
var senders = {
    'initiator': 'sendonly',
    'responder': 'recvonly',
    'both': 'sendrecv',
    'none': 'inactive',
    'sendonly': 'initator',
    'recvonly': 'responder',
    'sendrecv': 'both',
    'inactive': 'none'
};


exports.toSessionSDP = function (session, sid, time) {
    var sdp = [
        'v=0',
        'o=- ' + (sid || session.sid || Date.now()) + ' ' + (time || Date.now()) + ' IN IP4 0.0.0.0',
        's=-',
        't=0 0'
    ];

    var groups = session.groups || [];
    groups.forEach(function (group) {
        sdp.push('a=group:' + group.semantics + ' ' + group.contents.join(' '));
    });

    var contents = session.contents || [];
    contents.forEach(function (content) {
        sdp.push(exports.toMediaSDP(content));
    });

    return sdp.join('\r\n') + '\r\n';
};

exports.toMediaSDP = function (content) {
    var sdp = [];

    var desc = content.description;
    var transport = content.transport;
    var payloads = desc.payloads || [];
    var fingerprints = (transport && transport.fingerprints) || [];

    var mline = [desc.media, '1'];

    if ((desc.encryption && desc.encryption.length > 0) || (fingerprints.length > 0)) {
        mline.push('RTP/SAVPF');
    } else {
        mline.push('RTP/AVPF');
    }
    payloads.forEach(function (payload) {
        mline.push(payload.id);
    });


    sdp.push('m=' + mline.join(' '));

    sdp.push('c=IN IP4 0.0.0.0');
    sdp.push('a=rtcp:1 IN IP4 0.0.0.0');

    if (transport) {
        if (transport.ufrag) {
            sdp.push('a=ice-ufrag:' + transport.ufrag);
        }
        if (transport.pwd) {
            sdp.push('a=ice-pwd:' + transport.pwd);
        }
        if (transport.setup) {
            sdp.push('a=setup:' + transport.setup);
        }
        fingerprints.forEach(function (fingerprint) {
            sdp.push('a=fingerprint:' + fingerprint.hash + ' ' + fingerprint.value);
        });
    }

    sdp.push('a=' + (senders[content.senders] || 'sendrecv'));
    sdp.push('a=mid:' + content.name);

    if (desc.mux) {
        sdp.push('a=rtcp-mux');
    }

    var encryption = desc.encryption || [];
    encryption.forEach(function (crypto) {
        sdp.push('a=crypto:' + crypto.tag + ' ' + crypto.cipherSuite + ' ' + crypto.keyParams + (crypto.sessionParams ? ' ' + crypto.sessionParams : ''));
    });

    payloads.forEach(function (payload) {
        var rtpmap = 'a=rtpmap:' + payload.id + ' ' + payload.name + '/' + payload.clockrate;
        if (payload.channels && payload.channels != '1') {
            rtpmap += '/' + payload.channels;
        }
        sdp.push(rtpmap);

        if (payload.parameters && payload.parameters.length) {
            var fmtp = ['a=fmtp:' + payload.id];
            payload.parameters.forEach(function (param) {
                fmtp.push((param.key ? param.key + '=' : '') + param.value);
            });
            sdp.push(fmtp.join(' '));
        }

        if (payload.feedback) {
            payload.feedback.forEach(function (fb) {
                if (fb.type === 'trr-int') {
                    sdp.push('a=rtcp-fb:' + payload.id + ' trr-int ' + fb.value ? fb.value : '0');
                } else {
                    sdp.push('a=rtcp-fb:' + payload.id + ' ' + fb.type + (fb.subtype ? ' ' + fb.subtype : ''));
                }
            });
        }
    });

    if (desc.feedback) {
        desc.feedback.forEach(function (fb) {
            if (fb.type === 'trr-int') {
                sdp.push('a=rtcp-fb:* trr-int ' + fb.value ? fb.value : '0');
            } else {
                sdp.push('a=rtcp-fb:* ' + fb.type + (fb.subtype ? ' ' + fb.subtype : ''));
            }
        });
    }

    var hdrExts = desc.headerExtensions || [];
    hdrExts.forEach(function (hdr) {
        sdp.push('a=extmap:' + hdr.id + (hdr.senders ? '/' + senders[hdr.senders] : '') + ' ' + hdr.uri);
    });

    var ssrcGroups = desc.sourceGroups || [];
    ssrcGroups.forEach(function (ssrcGroup) {
        sdp.push('a=ssrc-group:' + ssrcGroup.semantics + ' ' + ssrcGroup.sources.join(' '));
    });

    var ssrcs = desc.sources || [];
    ssrcs.forEach(function (ssrc) {
        for (var i = 0; i < ssrc.parameters.length; i++) {
            var param = ssrc.parameters[i];
            sdp.push('a=ssrc:' + (ssrc.ssrc || desc.ssrc) + ' ' + param.key + (param.value ? (':' + param.value) : ''));
        }
    });

    var candidates = transport.candidates || [];
    candidates.forEach(function (candidate) {
        sdp.push(exports.toCandidateSDP(candidate));
    });

    return sdp.join('\r\n');
};

exports.toCandidateSDP = function (candidate) {
    var sdp = [];

    sdp.push(candidate.foundation);
    sdp.push(candidate.component);
    sdp.push(candidate.protocol);
    sdp.push(candidate.priority);
    sdp.push(candidate.ip);
    sdp.push(candidate.port);

    var type = candidate.type;
    sdp.push('typ');
    sdp.push(type);
    if (type === 'srflx' || type === 'prflx' || type === 'relay') {
        if (candidate.relAddr && candidate.relPort) {
            sdp.push('raddr');
            sdp.push(candidate.relAddr);
            sdp.push('rport');
            sdp.push(candidate.relPort);
        }
    }

    sdp.push('generation');
    sdp.push(candidate.generation || '0');

    return 'a=candidate:' + sdp.join(' ');
};

},{}],18:[function(require,module,exports){
var parsers = require('./parsers');
var idCounter = Math.random();

exports._setIdCounter = function (counter) {
    idCounter = counter;
};

exports.toSessionJSON = function (sdp, creator) {
    // Divide the SDP into session and media sections.
    var media = sdp.split('\r\nm=');
    for (var i = 1; i < media.length; i++) {
        media[i] = 'm=' + media[i];
        if (i !== media.length - 1) {
            media[i] += '\r\n';
        }
    }
    var session = media.shift() + '\r\n';
    var sessionLines = parsers.lines(session);
    var parsed = {};

    var contents = [];
    media.forEach(function (m) {
        contents.push(exports.toMediaJSON(m, session, creator));
    });
    parsed.contents = contents;

    var groupLines = parsers.findLines('a=group:', sessionLines);
    if (groupLines.length) {
        parsed.groups = parsers.groups(groupLines);
    }

    return parsed;
};

exports.toMediaJSON = function (media, session, creator) {
    var lines = parsers.lines(media);
    var sessionLines = parsers.lines(session);
    var mline = parsers.mline(lines[0]);

    var content = {
        creator: creator,
        name: mline.media,
        description: {
            descType: 'rtp',
            media: mline.media,
            payloads: [],
            encryption: [],
            feedback: [],
            headerExtensions: []
        },
        transport: {
            transType: 'iceUdp',
            candidates: [],
            fingerprints: []
        }
    };
    var desc = content.description;
    var trans = content.transport;

    var ssrc = parsers.findLine('a=ssrc:', lines);
    if (ssrc) {
        desc.ssrc = ssrc.substr(7).split(' ')[0];
    }

    // If we have a mid, use that for the content name instead.
    var mid = parsers.findLine('a=mid:', lines);
    if (mid) {
        content.name = mid.substr(6);
    }

    if (parsers.findLine('a=sendrecv', lines, sessionLines)) {
        content.senders = 'both';
    } else if (parsers.findLine('a=sendonly', lines, sessionLines)) {
        content.senders = 'initiator';
    } else if (parsers.findLine('a=recvonly', lines, sessionLines)) {
        content.senders = 'responder';
    } else if (parsers.findLine('a=inactive', lines, sessionLines)) {
        content.senders = 'none';
    }

    var rtpmapLines = parsers.findLines('a=rtpmap:', lines);
    rtpmapLines.forEach(function (line) {
        var payload = parsers.rtpmap(line);
        payload.feedback = [];

        var fmtpLines = parsers.findLines('a=fmtp:' + payload.id, lines);
        fmtpLines.forEach(function (line) {
            payload.parameters = parsers.fmtp(line);
        });

        var fbLines = parsers.findLines('a=rtcp-fb:' + payload.id, lines);
        fbLines.forEach(function (line) {
            payload.feedback.push(parsers.rtcpfb(line));
        });

        desc.payloads.push(payload);
    });

    var cryptoLines = parsers.findLines('a=crypto:', lines, sessionLines);
    cryptoLines.forEach(function (line) {
        desc.encryption.push(parsers.crypto(line));
    });

    if (parsers.findLine('a=rtcp-mux', lines)) {
        desc.mux = true;
    }

    var fbLines = parsers.findLines('a=rtcp-fb:*', lines);
    fbLines.forEach(function (line) {
        desc.feedback.push(parsers.rtcpfb(line));
    });

    var extLines = parsers.findLines('a=extmap:', lines);
    extLines.forEach(function (line) {
        var ext = parsers.extmap(line);

        var senders = {
            sendonly: 'responder',
            recvonly: 'initiator',
            sendrecv: 'both',
            inactive: 'none'
        };
        ext.senders = senders[ext.senders];

        desc.headerExtensions.push(ext);
    });

    var ssrcGroupLines = parsers.findLines('a=ssrc-group:', lines);
    desc.sourceGroups = parsers.sourceGroups(ssrcGroupLines || []);

    var ssrcLines = parsers.findLines('a=ssrc:', lines);
    desc.sources = parsers.sources(ssrcLines || []);

    var fingerprintLines = parsers.findLines('a=fingerprint:', lines, sessionLines);
    fingerprintLines.forEach(function (line) {
        var fp = parsers.fingerprint(line);
        var setup = parsers.findLine('a=setup:', lines, sessionLines);
        if (setup) {
            fp.setup = setup.substr(8);
        }
        trans.fingerprints.push(fp);
    });

    var ufragLine = parsers.findLine('a=ice-ufrag:', lines, sessionLines);
    var pwdLine = parsers.findLine('a=ice-pwd:', lines, sessionLines);
    if (ufragLine && pwdLine) {
        trans.ufrag = ufragLine.substr(12);
        trans.pwd = pwdLine.substr(10);
        trans.candidates = [];

        var candidateLines = parsers.findLines('a=candidate:', lines, sessionLines);
        candidateLines.forEach(function (line) {
            trans.candidates.push(exports.toCandidateJSON(line));
        });
    }

    return content;
};

exports.toCandidateJSON = function (line) {
    var candidate = parsers.candidate(line.split('\r\n')[0]);
    candidate.id = (idCounter++).toString(36).substr(0, 12);
    return candidate;
};

},{"./parsers":19}],14:[function(require,module,exports){
// based on https://github.com/ESTOS/strophe.jingle/
// adds wildemitter support
var util = require('util');
var webrtc = require('webrtcsupport');
var WildEmitter = require('wildemitter');

function dumpSDP(description) {
    return 'type: ' + description.type + '\r\n' + description.sdp;
}

function TraceablePeerConnection(config, constraints) {
    var self = this;
    WildEmitter.call(this);

    this.peerconnection = new webrtc.PeerConnection(config, constraints);

    this.trace = function (what, info) {
        self.emit('PeerConnectionTrace', {
            time: new Date(),
            type: what,
            value: info || ""
        });
    };

    this.onicecandidate = null;
    this.peerconnection.onicecandidate = function (event) {
        self.trace('onicecandidate', JSON.stringify(event.candidate, null, ' '));
        if (self.onicecandidate !== null) {
            self.onicecandidate(event);
        }
    };
    this.onaddstream = null;
    this.peerconnection.onaddstream = function (event) {
        self.trace('onaddstream', event.stream.id);
        if (self.onaddstream !== null) {
            self.onaddstream(event);
        }
    };
    this.onremovestream = null;
    this.peerconnection.onremovestream = function (event) {
        self.trace('onremovestream', event.stream.id);
        if (self.onremovestream !== null) {
            self.onremovestream(event);
        }
    };
    this.onsignalingstatechange = null;
    this.peerconnection.onsignalingstatechange = function (event) {
        self.trace('onsignalingstatechange', self.signalingState);
        if (self.onsignalingstatechange !== null) {
            self.onsignalingstatechange(event);
        }
    };
    this.oniceconnectionstatechange = null;
    this.peerconnection.oniceconnectionstatechange = function (event) {
        self.trace('oniceconnectionstatechange', self.iceConnectionState);
        if (self.oniceconnectionstatechange !== null) {
            self.oniceconnectionstatechange(event);
        }
    };
    this.onnegotiationneeded = null;
    this.peerconnection.onnegotiationneeded = function (event) {
        self.trace('onnegotiationneeded');
        if (self.onnegotiationneeded !== null) {
            self.onnegotiationneeded(event);
        }
    };
    self.ondatachannel = null;
    this.peerconnection.ondatachannel = function (event) {
        self.trace('ondatachannel', event);
        if (self.ondatachannel !== null) {
            self.ondatachannel(event);
        }
    };
}

util.inherits(TraceablePeerConnection, WildEmitter);

if (TraceablePeerConnection.prototype.__defineGetter__ !== undefined) {
    TraceablePeerConnection.prototype.__defineGetter__('signalingState', function () { return this.peerconnection.signalingState; });
    TraceablePeerConnection.prototype.__defineGetter__('iceConnectionState', function () { return this.peerconnection.iceConnectionState; });
    TraceablePeerConnection.prototype.__defineGetter__('localDescription', function () { return this.peerconnection.localDescription; });
    TraceablePeerConnection.prototype.__defineGetter__('remoteDescription', function () { return this.peerconnection.remoteDescription; });
}

TraceablePeerConnection.prototype.addStream = function (stream) {
    this.trace('addStream', stream.id);
    this.peerconnection.addStream(stream);
};

TraceablePeerConnection.prototype.removeStream = function (stream) {
    this.trace('removeStream', stream.id);
    this.peerconnection.removeStream(stream);
};

TraceablePeerConnection.prototype.createDataChannel = function (label, opts) {
    this.trace('createDataChannel', label, opts);
    return this.peerconnection.createDataChannel(label, opts);
};

TraceablePeerConnection.prototype.setLocalDescription = function (description, successCallback, failureCallback) {
    var self = this;
    this.trace('setLocalDescription', dumpSDP(description));
    this.peerconnection.setLocalDescription(description,
        function () {
            self.trace('setLocalDescriptionOnSuccess');
            successCallback();
        },
        function (err) {
            self.trace('setLocalDescriptionOnFailure', err);
            failureCallback(err);
        }
    );
};

TraceablePeerConnection.prototype.setRemoteDescription = function (description, successCallback, failureCallback) {
    var self = this;
    this.trace('setRemoteDescription', dumpSDP(description));
    this.peerconnection.setRemoteDescription(description,
        function () {
            self.trace('setRemoteDescriptionOnSuccess');
            successCallback();
        },
        function (err) {
            self.trace('setRemoteDescriptionOnFailure', err);
            failureCallback(err);
        }
    );
};

TraceablePeerConnection.prototype.close = function () {
    this.trace('stop');
    if (this.statsinterval !== null) {
        window.clearInterval(this.statsinterval);
        this.statsinterval = null;
    }
    this.peerconnection.close();
};

TraceablePeerConnection.prototype.createOffer = function (successCallback, failureCallback, constraints) {
    var self = this;
    this.trace('createOffer', JSON.stringify(constraints, null, ' '));
    this.peerconnection.createOffer(
        function (offer) {
            self.trace('createOfferOnSuccess', dumpSDP(offer));
            successCallback(offer);
        },
        function (err) {
            self.trace('createOfferOnFailure', err);
            failureCallback(err);
        },
        constraints
    );
};

TraceablePeerConnection.prototype.createAnswer = function (successCallback, failureCallback, constraints) {
    var self = this;
    this.trace('createAnswer', JSON.stringify(constraints, null, ' '));
    this.peerconnection.createAnswer(
        function (answer) {
            self.trace('createAnswerOnSuccess', dumpSDP(answer));
            successCallback(answer);
        },
        function (err) {
            self.trace('createAnswerOnFailure', err);
            failureCallback(err);
        },
        constraints
    );
};

TraceablePeerConnection.prototype.addIceCandidate = function (candidate, successCallback, failureCallback) {
    var self = this;
    this.trace('addIceCandidate', JSON.stringify(candidate, null, ' '));
    this.peerconnection.addIceCandidate(candidate);
    /* maybe later
    this.peerconnection.addIceCandidate(candidate, 
        function () {                                
            self.trace('addIceCandidateOnSuccess');
            successCallback();
        },
        function (err) {
            self.trace('addIceCandidateOnFailure', err);
            failureCallback(err);
        }
    );
    */
};

TraceablePeerConnection.prototype.getStats = function (callback, errback) {
    if (navigator.mozGetUserMedia) {
        // ignore for now...
    } else {
        this.peerconnection.getStats(callback);
    }
};

module.exports = TraceablePeerConnection;

},{"util":10,"webrtcsupport":2,"wildemitter":13}],19:[function(require,module,exports){
exports.lines = function (sdp) {
    return sdp.split('\r\n').filter(function (line) {
        return line.length > 0;
    });
};

exports.findLine = function (prefix, mediaLines, sessionLines) {
    var prefixLength = prefix.length;
    for (var i = 0; i < mediaLines.length; i++) {
        if (mediaLines[i].substr(0, prefixLength) === prefix) {
            return mediaLines[i];
        }
    }
    // Continue searching in parent session section
    if (!sessionLines) {
        return false;
    }

    for (var j = 0; j < sessionLines.length; j++) {
        if (sessionLines[j].substr(0, prefixLength) === prefix) {
            return sessionLines[j];
        }
    }

    return false;
};

exports.findLines = function (prefix, mediaLines, sessionLines) {
    var results = [];
    var prefixLength = prefix.length;
    for (var i = 0; i < mediaLines.length; i++) {
        if (mediaLines[i].substr(0, prefixLength) === prefix) {
            results.push(mediaLines[i]);
        }
    }
    if (results.length || !sessionLines) {
        return results;
    }
    for (var j = 0; j < sessionLines.length; j++) {
        if (sessionLines[j].substr(0, prefixLength) === prefix) {
            results.push(sessionLines[j]);
        }
    }
    return results;
};

exports.mline = function (line) {
    var parts = line.substr(2).split(' ');
    var parsed = {
        media: parts[0],
        port: parts[1],
        proto: parts[2],
        formats: []
    };
    for (var i = 3; i < parts.length; i++) {
        if (parts[i]) {
            parsed.formats.push(parts[i]);
        }
    }
    return parsed;
};

exports.rtpmap = function (line) {
    var parts = line.substr(9).split(' ');
    var parsed = {
        id: parts.shift()
    };

    parts = parts[0].split('/');

    parsed.name = parts[0];
    parsed.clockrate = parts[1];
    parsed.channels = parts.length == 3 ? parts[2] : '1';
    return parsed;
};

exports.fmtp = function (line) {
    var kv, key, value;
    var parts = line.substr(line.indexOf(' ') + 1).split(';');
    var parsed = [];
    for (var i = 0; i < parts.length; i++) {
        kv = parts[i].split('=');
        key = kv[0].trim();
        value = kv[1];
        if (key && value) {
            parsed.push({key: key, value: value});
        } else if (key) {
            parsed.push({key: '', value: key});
        }
    }
    return parsed;
};

exports.crypto = function (line) {
    var parts = line.substr(9).split(' ');
    var parsed = {
        tag: parts[0],
        cipherSuite: parts[1],
        keyParams: parts[2],
        sessionParams: parts.slice(3).join(' ')
    };
    return parsed;
};

exports.fingerprint = function (line) {
    var parts = line.substr(14).split(' ');
    return {
        hash: parts[0],
        value: parts[1]
    };
};

exports.extmap = function (line) {
    var parts = line.substr(9).split(' ');
    var parsed = {};

    var idpart = parts.shift();
    var sp = idpart.indexOf('/');
    if (sp >= 0) {
        parsed.id = idpart.substr(0, sp);
        parsed.senders = idpart.substr(sp + 1);
    } else {
        parsed.id = idpart;
        parsed.senders = 'sendrecv';
    }

    parsed.uri = parts.shift() || '';

    return parsed;
};

exports.rtcpfb = function (line) {
    var parts = line.substr(10).split(' ');
    var parsed = {};
    parsed.id = parts.shift();
    parsed.type = parts.shift();
    if (parsed.type === 'trr-int') {
        parsed.value = parts.shift();
    } else {
        parsed.subtype = parts.shift() || '';
    }
    parsed.parameters = parts;
    return parsed;
};

exports.candidate = function (line) {
    var parts = line.substring(12).split(' ');

    var candidate = {
        foundation: parts[0],
        component: parts[1],
        protocol: parts[2].toLowerCase(),
        priority: parts[3],
        ip: parts[4],
        port: parts[5],
        // skip parts[6] == 'typ'
        type: parts[7],
        generation: '0'
    };

    for (var i = 8; i < parts.length; i += 2) {
        if (parts[i] === 'raddr') {
            candidate.relAddr = parts[i + 1];
        } else if (parts[i] === 'rport') {
            candidate.relPort = parts[i + 1];
        } else if (parts[i] === 'generation') {
            candidate.generation = parts[i + 1];
        }
    }

    candidate.network = '1';

    return candidate;
};

exports.sourceGroups = function (lines) {
    var parsed = [];
    for (var i = 0; i < lines.length; i++) {
        var parts = lines[i].substr(13).split(' ');
        parsed.push({
            semantics: parts.shift(),
            sources: parts
        });
    }
    return parsed;
};

exports.sources = function (lines) {
    // http://tools.ietf.org/html/rfc5576
    var parsed = [];
    var sources = {};
    for (var i = 0; i < lines.length; i++) {
        var parts = lines[i].substr(7).split(' ');
        var ssrc = parts.shift();

        if (!sources[ssrc]) {
            var source = {
                ssrc: ssrc,
                parameters: []
            };
            parsed.push(source);

            // Keep an index
            sources[ssrc] = source;
        }

        parts = parts.join(' ').split(':');
        var attribute = parts.shift();
        var value = parts.join(':') || null;

        sources[ssrc].parameters.push({
            key: attribute,
            value: value
        });
    }

    return parsed;
};

exports.groups = function (lines) {
    // http://tools.ietf.org/html/rfc5888
    var parsed = [];
    var parts;
    for (var i = 0; i < lines.length; i++) {
        parts = lines[i].substr(8).split(' ');
        parsed.push({
            semantics: parts.shift(),
            contents: parts
        });
    }
    return parsed;
};

},{}]},{},[1])(1)
});
;