padmaEssay/padma.layers.js

var padmaConfig = {
  'background': 'rgba(0,0,0,0.85)',
  'color': '#fff',
  'links_url': 'pad.ma/',
  'data_url': 'http://next.pad.ma/',
  'default_layers': ['transcripts', 'descriptions'],
};

(function($) {

var BASE_URL = padmaConfig.data_url;

var padmaVideo = function(videoId) {
  this.id = videoId;
//  this.videoUrl = BASE_URL + videoId + "/video.js";
//  this.layersUrl = BASE_URL + videoId + "/layers.js";
//  this.infoUrl = BASE_URL + videoId + "/info";
//  this.hasVideoData = false;
//  this.hasLayersData = false;
  this.hasAllData = false;
  this.video = {};
  this.layers = {};
  var that = this;
  padmaVideo.cache.push(that); 
}

padmaVideo.prototype.getAllData = function(callback, data) {
  var that = this;
  if (!this.hasAllData) {
    var keys = ['layers', 'title', 'duration']
    var d = JSON.stringify({
        'id': that.id,
        'keys': keys
    });
    var url = BASE_URL + "api/";
    $.post(url, {'action': 'get', 'data': d}, function(response) {
        var v = response.data;
        that.video.title = v.title;
        that.video.duration = v.duration;
        that.infoUrl = padmaConfig.data_url + that.id + "/info";
        that.layers = flattenLayers(v.layers);
        that.hasAllData = true;
        that.hasLayersData = true;
        that.videoSrc = that.getVideo(0, '240');

        callback(that, data);
    }, "json");    

/*
    $.getScript(that.videoUrl, function() {
      that.video = video;
      that.hasVideoData = true;
      $.getScript(that.layersUrl, function() {
        that.layers = layers;
        that.hasLayersData = true;
        that.hasAllData = true;
        callback(that, data);
      });
    });
*/
  } else {
    callback(that, data);
  }
}

//tc in npt
padmaVideo.prototype.getFrame = function(tc) {
  tc = npt2ms(tc) / 1000
  return BASE_URL + this.id + "/240p" + tc + ".jpg";
}

//tc in npt
padmaVideo.prototype.getVideo = function(tc, size) {
  if (!this.hasAllData) {
    return false;
  }
  if (typeof(size) == 'undefined') {
    size = '240';
  }
  return BASE_URL + this.id + "/" + size + "p.webm";
//  return this.video.urls[size] + "?t=npt:" + tc;   
}


padmaVideo.prototype.getDownloadLink = function(tcIn, tcOut) {
    var inSeconds = npt2ms(tcIn) / 1000;
    var outSeconds = npt2ms(tcOut) / 1000;
    return this.getVideo(0, "480") + "?t=" + inSeconds + "," + outSeconds;
//  return BASE_URL + this.id + "/download/" + tcIn + "-" + tcOut + ".ogv";  
}


padmaVideo.prototype.getLayerVideo = function(tcIn, tcOut) {
  return this.video.urls['320'] + "?t=" + tcIn + "/" + tcOut;
}

padmaVideo.prototype.noop = function() {
//  console.log("I'm done:)");
  $.noop();
}

padmaVideo.prototype.getVideoData = function(callback, data) {
  var that = this;
  if (this.hasVideoData) {
    callback(that, data);
  } else {
    $.getScript(that.videoUrl, function() {
      that.video = video;
      that.hasVideoData = true;
      callback(that, data);
    });
  }
}

padmaVideo.prototype.getLayersData = function(callback, data) {
  var that = this;
  if (this.hasLayersData) {
    callback(that, data);
  } else {
    $.getScript(that.layersUrl, function() {
      that.layers = layers;
      that.hasLayersData = true;
      callback(that, data);
    });
  }
}

padmaVideo.prototype.getLayerById = function(id) {
  var that = this;
  if (!this.hasLayersData) {
    return false;  
  }
  for (var i=0; i < that.layers.length; i++) {
    var thisLayer = that.layers[i];
    if (thisLayer.id == id) {
      return thisLayer;
    }
  }
  return null;     
}

//timecode in ms
padmaVideo.prototype.getLayersAtTimecode = function(tc) {
  var that = this;
  if (!this.hasLayersData) {
    return false;
  }
//  console.log(tc);
  var layers = [];
  for (var i=0; i < that.layers.length; i++) {
    var thisLayer = that.layers[i];
//    thisLayer.time_in = thisLayer.in * 1000;
//    thisLayer.time_out = thisLayer.out * 1000;
    if (tc > thisLayer.time_in && tc < thisLayer.time_out) {
      layers.push(thisLayer);
    }
  }
  return layers;
}

padmaVideo.prototype.getLayerById = function(id) {
  var that = this;
  var id = $.trim(id);
  for (var i=0; i < that.layers.length; i++) {
    var thisLayer = that.layers[i];
    if (thisLayer.id == id) {
      return thisLayer;
    } 
  }
  return false;
}

//convert layers format from new structure to old
function flattenLayers(layers) {
    var ret = [];
    for (var track in layers) {
        if (layers.hasOwnProperty(track)) {
           for (var i=0; i<layers[track].length; i++) {
                var thisLayer = layers[track][i];
                thisLayer.track = track;
                thisLayer.value_html = thisLayer.value;
                thisLayer.time_in = parseInt(thisLayer['in'] * 1000);
                thisLayer.time_out = parseInt(thisLayer['out'] * 1000);
                thisLayer.creator = thisLayer.user;
                ret.push(thisLayer);                
            } 
        }
    }
    return ret;
}


function filterLayersByTracks(layers, tracks) {
  var matchedLayers = [] 
  for (var i=0; i < layers.length; i++) {
    var layer = layers[i];
//    console.log(layer.track);
    if ($.inArray(layer.track, tracks) != -1) {
      matchedLayers.push(layer);
    }   
  }
  return matchedLayers;  
}

function filterLayersByContributors(layers, users) {
  var matchedLayers = [];
  for (var i=0; i < layers.length; i++) {
    var layer = layers[i];
    if ($.inArray(layer.contributor, users)) {
      matchedLayers.push(layer);
    }
  }
  return matchedLayers;
}

padmaVideo.cache = [];

padmaVideo.getFromCache = function(videoId) {
  var cache = padmaVideo.cache;
  for (var i=0; i<cache.length; i++) {
    var v = cache[i];
    if (v.id === videoId) {
      return v;
    }
  }
  return false;
}

window.padmaVideo = padmaVideo;
window.filterLayersByTracks = filterLayersByTracks;
window.filterLayersByContributors = filterLayersByContributors;



})(jQuery);