Adds link to audio guestbook

[rbdr/r.bdr.sh] / jekyll / js / unlimited_pizza / pepperoni.js

Class(UnlimitedPizza, "Pepperoni").inherits(Widget)({
  INNER_HTML : ' \
<a class="record-button">&#11044</a> \
<div class="record-info"> \
  <div class="record-progress"> \
    <div class="record-progress-bar-container"> \
      <div class="record-progress-bar"></div> \
    </div> \
    <a class="record-clear">X</a> \
  </div> \
  <audio class="record-preview" controls></audio> \
</div> \
  ',
  PAUSE : '&#9616;&#9616;',
  RECORD : '&#11044;',
  prototype : {
    maxSize : 1048576,
    recording : false,
    source : null,
    recorder : null,
    context : null,
    workerPath : '/js/vendor/recorderjs/recorderWorker.js',
    init : function init(config) {
      Widget.prototype.init.call(this, config);

      if (!this.context) {
        this.context = new (window.AudioContext || window.webkitAudioContext)();
      }

      if (!this.source) {
        this._getUserMedia({
          audio : true
        }, this._onUserMedia.bind(this), this._onUserMediaError.bind(this))
      }

      this.element.html(this.constructor.INNER_HTML);

      this.controlButton = this.element.find('.record-button');
      this.clearButton = this.element.find('.record-clear');
      this.audioElement = this.element.find('audio');
      this.progressBarContainer = this.element.find('.record-progress-bar-container');
      this.progressBar = this.element.find('.record-progress-bar');

      this._bindEvents();
    },

    record : function record() {
      if (this.recorder && !this.recording) {
        this._canRecord(function handleCanRecord(canRecord) {
          if (canRecord) {
            this.recording = true;
            this.controlButton.addClass('recording')
            this.controlButton.html(this.constructor.PAUSE);
            this._interval = setInterval(this._onRecordCheck.bind(this), 100);
            this.recorder.record();
          }
        }.bind(this));
      }
    },

    stop : function stop() {
      if (this.recorder && this.recording) {
        this.recording = false;
        this.controlButton.removeClass('recording')
        this.controlButton.html(this.constructor.RECORD);
        clearInterval(this._interval);
        this.recorder.stop();
        this.recorder.exportWAV();
      }
    },

    clear : function clear() {
      if (this.recorder) {
        this.progressBar.width(0);
        this.audioElement.attr('src', '');
        this.audioElement[0].load();
        this.recorder.clear()
      }
    },

    finalize : function finalize(callback) {
      if (this.recorder) {
        this.recorder.exportWAV(callback);
      }
    },

    getBuffer : function getBuffer(callback) {
      if (this.recorder) {
        this.recorder.getBuffer(callback);
      }
    },

    _bindEvents : function bindEvents() {
      this.controlButton.on('click', function () {
        if (this.recording) {
          this.stop();
        } else {
          this.record();
        }
      }.bind(this))

      this.clearButton.on('click', function () {
        if (!this.recording) {
          this.clear();
        }
      }.bind(this))
    },

    _onRecording : function _onRecording(buffer) {
      this._buffer = buffer;

      this.audioElement.attr('src', URL.createObjectURL(buffer));
      this.audioElement[0].load();
    },

    _onUserMedia : function _onUserMedia(localMediaStream) {
      this.source = this.context.createMediaStreamSource(localMediaStream);
      this.recorder = new Recorder(this.source, {
        workerPath : this.workerPath,
        callback : this._onRecording.bind(this)
      });
    },

    _onUserMediaError : function _onUserMediaError(error) {
      console.log("Something went wrong", error);
      this.disable();
    },

    _onRecordCheck : function _onRecordCheck() {
      this._canRecord(function (canRecord, bufferSize) {
        var width =  bufferSize * this.progressBarContainer.width() / this.maxSize;
        this.progressBar.width(width);
        if (!canRecord) {
          this.stop();
        }
      }.bind(this));
    },

    _canRecord : function _canRecord(callback) {
      this.recorder.getBuffer(function getBuffer(buffer) {
        var bufferSize = buffer[0].length + buffer[1].length;
         callback && callback(bufferSize <= this.maxSize, bufferSize);
      }.bind(this));
    },

    // Normalize get user media
    _getUserMedia : (navigator.getUserMedia ||
                     navigator.webkitGetUserMedia ||
                     navigator.mozGetUserMedia ||
                     navigator.msGetUserMedia).bind(navigator)
  }
});