jwplayer-event-history.js

/*
  This script extends jwplayer api instances with a `_history`
  property which is a hash of event types including "all".

  After including this on the page, to check if a "play" event fired,
  call `jwplayer()._history.play`. Initially this returns `undefined`.
  Once the event is fired an array is populated with an object for each
  event fired.
  
  The `jwplayer()._history.all` array will always be present and contains
  all events fired by the player since this script attached it's "all" listener.
  
  Added `_getEvents(type)` and `_getLastEvent(type)`.
  `_getEvents` always returns an Array so you can check length.
  `_getLastEvent` always returns an Object so you can check event properties.
  
  This script will add player on embed and jQuery ready. You can require it
  or run the global `jwplayerEventHistory()` right after any player setup
  to add history to it.
*/

(function() {

    // this event callback adds history to jwplayer() instances
    var storeEventHistory = function(type, event) {
        event.__time = Date.now();
        this._history[type] = this._history[type] || [];
        this._history[type].push(event);
        this._history.all.push(event);
    };

    // this registers the above callback to all current jwplayer() instances
    var jwplayerEventHistory = function(jwplayer) {
        var players = [];
        jwplayer = jwplayer || window.jwplayer;
        if (!jwplayer) {
          return players;
        }
        for (var i=0; i<100; i++) {
            var jwInstance = jwplayer(i);
            if (typeof jwInstance.on !== 'function') {
                return players;
            }
            jwInstance._history = jwInstance._history || {
                all: []
            };
            jwInstance._getEvents = function(type) {
                return this._history[type] || [];
            };
            jwInstance._getLastEvent = function(type) {
                var history = this._getEvents(type);
                if (history.length) {
                    return history[history.length-1];
                }
                return {};
            };
            jwInstance.off('all'); //, storeEventHistory); // off('all', fn) does not work
            jwInstance.on('all', storeEventHistory);
            players.push(jwInstance);
        }
        return players;
    };

    // run above function to add players on page ready (jQuery), or require (AMD/CommonJS)
    if (typeof $ === 'function') {
        $(jwplayerEventHistory);
    }
    if (typeof define === 'function' && define.amd) {
        define(['jwplayerEventHistory'], jwplayerEventHistory);
    } else if (typeof module === 'object' && module.exports) {
        module.exports = jwplayerEventHistory;
    }
    
    window.jwplayerEventHistory = jwplayerEventHistory;

    return jwplayerEventHistory(window.jwplayer);
})();