snapdrop/app/elements/p2p-network/connection-wrapper.html

<link rel="import" href="p2p-network.html">
<link rel="import" href="web-socket.html">
<dom-module id="connection-wrapper">
    <template>
        <p2p-network id="p2p" me="{{me}}"></p2p-network>
        <web-socket id="ws" me="{{me}}"></web-socket>
    </template>
    <script>
    'use strict';
    (function() {
        function guid() {
            function s4() {
                return Math.floor((1 + Math.random()) * 0x10000)
                    .toString(16)
                    .substring(1);
            }
            return s4() + s4() + '-' + s4() + '-' + s4() + '-' +
                s4() + '-' + s4() + s4() + s4();
        }
        var webRTCSupported = window.RTCPeerConnection || window.mozRTCPeerConnection || window.webkitRTCPeerConnection || window.webkitRTCPeerConnection;

        function rtcConnectionSupported(peerId) {
            return webRTCSupported && (peerId.indexOf('rtc_') === 0);
        }
        Polymer({
            is: 'connection-wrapper',
            properties: {
                me: {
                    notify: true,
                    value: (webRTCSupported ? 'rtc_' : 'ws_') + guid()
                }
            },
            behaviors: [Chat.FileTransferProtocol],
            _sendFile: function(toPeer, file) {
                if (!rtcConnectionSupported(toPeer)) {
                    this.$.ws._sendFile(toPeer, file);
                } else {
                    this.$.p2p._sendFile(toPeer, file);
                }
            },
            _sendSystemEvent: function(toPeer, event) {
                console.log('system event', toPeer, event);
                if (!rtcConnectionSupported(toPeer)) {
                    this.$.ws._sendSystemEvent(toPeer, event);
                } else {
                    this.$.p2p._sendSystemEvent(toPeer, event);
                }
            },
            connectToPeer: function(toPeer, callback) {
                if (!rtcConnectionSupported(toPeer)) {
                    callback();
                } else {
                    this.$.p2p.connectToPeer(toPeer,callback);
                }
            },
        });
    })();
    </script>
</dom-module>