Track Wistia videos using Vertster

vswap.wistia-tracker.js

/*
 * Tracks a video's play progress via Vertster
 *
 * Usage:
 *
 *   Vswap.trackWistiaVideo(560, 'wistia_123', 63.0);
 *
 * Note: This currently only works with a Wistia video embed but could be easily adapted to
 *       work with YouTube or other video players.
 */
Vswap.trackWistiaVideo = function(vertsterId, playerId, videoDuration) {
  // wistia player states
  var PLAYING = 1;
  var ENDED = 0;
  
  // keep track of what events have been sent to vertster (we should only send each one once)
  var events = {
    play: { triggered: false, conditions: function(s,t){ return(s == PLAYING) } },
    'video-progress-25': { triggered: false, conditions: function(s,t){ return(t/videoDuration >= 0.25) } },
    'video-progress-50': { triggered: false, conditions: function(s,t){ return(t/videoDuration >= 0.5) } },
    'video-progress-75': { triggered: false, conditions: function(s,t){ return(t/videoDuration >= 0.75) } },
    'video-progress-100': { triggered: false, conditions: function(s,t){ return(s == ENDED) } }
  };
  
  // poll the player and determine what events to send
  var pollPlayer = function() {
    var video = document[playerId];
  
    try {
      var state = video.getCurrentState();
      var time = video.getCurrentTime();
    } catch(e) {
      return;
    }
    
    // check each event to see if it's been triggered
    for (var event in events) {
      if (!events[event].triggered && events[event].conditions(state, time)) {
        // shoot the info to the vertster hivemind
        events[event].triggered = true;
        Vswap.track.conversion(vertsterId + '-' + event, 0);
      }
    }
  };
  
  // poll the player once a second
  setInterval(pollPlayer, 1000);
};