gistfile1.txt

collaborativeLearningApp.service('screenShare', function($q, mainService) {
    var $scope = undefined;
    var that = this;
    this.socket = mainService.socket;
    this.getScope = function(s, room) {
        $scope = s;

        that.loadCount = 0;
        var countx = 0,
            county = 0;
        console.log("Link called");

        function drawImage(image) {
            var img = new Image;
            var elm = $('#screenShare canvas');
            console.log(elm);
            var ctx = elm[0].getContext('2d');
            img.onload = function() {
                that.loadCount = that.loadCount + 1;
                if (that.loadCount === 0) {
                    elm[0].width = img.width;
                    elm[0].height = img.height;
                }
                ctx.drawImage(img, 0, 0);
            };
            img.src = image;
        }

<<<<<<< HEAD
        var SERVER_URL = "ws://warm-chamber-3147.herokuapp.com/"; //"ws://" + window.location.hostname + ":8080/";
=======
        var SERVER_URL = "ws://" + tm.screenshareServer;
        console.log(tm.screenshareServer);
>>>>>>> 2901f21c3fcf4357fb16211d2ba50265a43fc41e
        //  var SERVER_URL = "ws://127.0.0.1:8080/";
        var connection = {};

        that.socket.on('screenShareCode', function(data) {
            if (!that.isConnector) {
                $('.lesson-control a').each(function() {
                    if ($(this).text() == 'Screen Share') {
                        $(this).addClass('active');
                        $scope.$apply(function() {
                            $scope.template = 'ScreenShare'
                        });
                    }
                });
                handleConnection(SERVER_URL + data.code, false);
            }
        });

        $scope.shareScreen = function() {
            $('.lesson-control a').each(function() {
                if ($(this).text() == 'Screen Share') {
                    $(this).addClass('active');
                    $scope.template = 'ScreenShare'
                }
            });
            handleConnection(SERVER_URL + $scope.code, true);
        };


        function handleConnection(url, isShareMode) {
            var deferred = $q.defer();
            var connection = new WebSocket(url);

            connection.binaryType = 'arraybuffer';
            connection.onopen = function() {
                deferred.resolve(connection);
                connection.send('{ "auth": { "apikey": "' + $scope.apikey + '", "appid": "' + $scope.appid + '" }}');
            };

            connection.onmessage = function(e) {
                console.log(typeof e.data);
                if (typeof e.data === 'string') {
                    if (isShareMode) {
                        that.isConnector = true;
                        if (e.data !== "") {
                            function docWriteWrapper(func) {
                                var writeTo = document.createElement('del'),
                                    oldwrite = document.write,
                                    content = '';
                                writeTo.id = "me";
                                document.write = function(text) {
                                    content += text;
                                };
                                func();
                                writeTo.innerHTML += content;
                                document.write = oldwrite;
                                document.body.appendChild(writeTo);
                            }
                            var attributes = { //codebase:'/embed/script/MainClass.class',
                                code: 'MainClass.class',
                                archive: tm.staticUrl + 'client/lib/ScreenSharingApple.jar',
                                width: 1,
                                height: 1
                            };
                            that.socket.emit('screenShareCode', {
                                code: e.data,
                                room: room
                            });
                            //$scope.screen_code = "Your code is: " + e.data;// code
                            console.log(e.data);
                            var parameters = {
                                Message: e.data,
                                serverURL: 'warm-chamber-3147.herokuapp.com', //window.location.hostname
                                port: 80
                            };
                            var version = '1.6';
                            docWriteWrapper(function() {
                                if (document.applets.length === 0)
                                    window.deployJava.writeAppletTag(attributes, parameters, version);
                            });
                        }
                    }

                }
                if (!that.isConnector) {
                    var image = arrayBufferToDataUri(e.data);
                    console.log("Data Recieved");
                    drawImage(image);
                }
            };
            return deferred.promise;
        }



        function arrayBufferToDataUri(arrayBuffer) {
            var base64 = '',
                encodings = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/',
                bytes = new Uint8Array(arrayBuffer),
                byteLength = bytes.byteLength,
                byteRemainder = byteLength % 3,
                mainLength = byteLength - byteRemainder,
                a, b, c, d, chunk;

            for (var i = 0; i < mainLength; i = i + 3) {
                chunk = (bytes[i] << 16) | (bytes[i + 1] << 8) | bytes[i + 2];
                a = (chunk & 16515072) >> 18;
                b = (chunk & 258048) >> 12;
                c = (chunk & 4032) >> 6;
                d = chunk & 63;
                base64 += encodings[a] + encodings[b] + encodings[c] + encodings[d];
            }

            if (byteRemainder == 1) {
                chunk = bytes[mainLength];
                a = (chunk & 252) >> 2;
                b = (chunk & 3) << 4;
                base64 += encodings[a] + encodings[b] + '==';
            } else if (byteRemainder == 2) {
                chunk = (bytes[mainLength] << 8) | bytes[mainLength + 1];
                a = (chunk & 16128) >> 8;
                b = (chunk & 1008) >> 4;
                c = (chunk & 15) << 2;
                base64 += encodings[a] + encodings[b] + encodings[c] + '=';
            }
            return "data:image/png;base64," + base64;
        }
    };
});