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<!doctype html>
<html>
  <head>
    <meta charset=utf-8>
    <title>Encrypted Media Extensions: persistent-license, retrieve and destroy, ClearKey</title>
    <link rel="help" href="https://w3c.github.io/encrypted-media/">

    <!-- Helper scripts for Encrypted Media Extensions tests  -->
    <script src=/encrypted-media/util/utils.js></script>
    <script src=/encrypted-media/util/fetch.js></script>
    <script src=/encrypted-media/util/utf8.js></script>
    <script src=/encrypted-media/util/testmediasource.js></script>

    <!-- Message handler for Clear Key keysystem -->
    <script src=/encrypted-media/util/clearkey-messagehandler.js></script>

  </head>
  <body>
    <div id='log'></div>

    <div id='video'>
      <video id="videoelement" width="200px"></video>
    </div>

    <script>
    // Wait for a message from the main window with details of our task
    window.addEventListener( 'message', function( event ) {

        var config = event.data.config,
            configuration = {   initDataTypes: [ config.initDataType ],
                                audioCapabilities: [ { contentType: config.audioType } ],
                                videoCapabilities: [ { contentType: config.videoType } ],
                                sessionTypes: [ 'persistent-license' ] },
            assertions = [ ];

            var _mediaKeys,
                _mediaKeySession;

            config.video = document.getElementById('videoelement');
            config.messagehandler = (new MessageHandler( 'org.w3.clearkey')).messagehandler;

        function onComplete() {
            window.opener.postMessage(assertions, '*');
        }

        function onFailure(error) {
            assertions.push( { actual: false, expected: true, message: error.toString() } );
            onComplete();
        }

        function onMessage( messageevent )
        {
            assertions.push( { expected: true, actual: messageevent instanceof window.MediaKeyMessageEvent, message: "event is of correct class" } );
            assertions.push( { expected: 'message', actual: messageevent.type, message: "event type is message" } );
            assertions.push( { expected: 'license-release', actual: messageevent.messageType, message: "message type is license-release" } );

            config.messagehandler( messageevent.messageType, messageevent.message )
            .then( function( response ) {
                messageevent.target.update( response ).catch(onFailure);
            });
        }

        function onTimeupdate(event) {
            if ( config.video.currentTime > ( config.duration || 1 ) ) {
                config.video.pause();
                config.video.removeAttribute('src');
                config.video.load();
                _mediaKeySession.remove();
            }
        }

        function onClosed() {
            // Try and reload and check this fails
            var mediaKeySession = _mediaKeys.createSession( 'persistent-license' );
            mediaKeySession.load( event.data.sessionId ).then( function( success ) {
                assertions.push( { expected: false, actual: success, message: "Load of removed session should fail" } );
                onComplete();
            }).catch(onFailure);
        }

        navigator.requestMediaKeySystemAccess(config.keysystem, [ configuration ] )
        .then(function(access) {
            return access.createMediaKeys();
        }).then(function(mediaKeys) {
            _mediaKeys = mediaKeys;
            return config.video.setMediaKeys(mediaKeys);
        }).then(function() {
            config.video.addEventListener('timeupdate', onTimeupdate, true);
            _mediaKeySession = _mediaKeys.createSession( 'persistent-license' );
            _mediaKeySession.addEventListener( 'message', onMessage );
            _mediaKeySession.closed.then(onClosed);
            return _mediaKeySession.load( event.data.sessionId );
        }).then(function( success ) {
            assertions.push( { actual: success, expected: true, message: "Expect load session to succeed" } );
            if ( !success ) throw new DOMException();
            return testmediasource(config);
        }).then(function(source) {
            config.video.src = URL.createObjectURL(source);
            config.video.play();
        })
        .catch(onFailure);
    } );

    </script>
  </body>
</html>