289 lines
8.1 KiB
JavaScript
289 lines
8.1 KiB
JavaScript
var OV;
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var session;
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var sessionId;
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var token;
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var nickName;
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var userName;
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var sessionName;
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/* OPENVIDU METHODS */
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function joinSession() {
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getSessionIdAndToken(function () {
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// --- 1) Get an OpenVidu object and init a session with the retrieved sessionId ---
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OV = new OpenVidu();
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session = OV.initSession(sessionId);
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// --- 2) Specify the actions when events take place ---
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// On every new Stream received...
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session.on('streamCreated', function (event) {
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// Subscribe to the Stream to receive it
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// HTML video will be appended to element with 'video-container' id
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var subscriber = session.subscribe(event.stream, 'video-container');
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// When the HTML video has been appended to DOM...
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subscriber.on('videoElementCreated', function (event) {
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// Add a new <p> element for the user's name and nickname just below its video
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appendUserData(event.element, subscriber.stream.connection);
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});
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});
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// On every Stream destroyed...
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session.on('streamDestroyed', function (event) {
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// Delete the HTML element with the user's name and nickname
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removeUserData(event.stream.connection);
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});
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// --- 3) Connect to the session passing the retrieved token and some more data from
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// the client (in this case a JSON with the nickname chosen by the user) ---
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session.connect(token, '{"clientData": "' + nickName + '"}', function (error) {
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// If the connection is successful, initialize a publisher and publish to the session
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if (!error) {
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// Here we check somehow if the user has at least 'PUBLISHER' role before
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// trying to publish its stream. Even if someone modified the client's code and
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// published the stream, it wouldn't work if the token sent in Session.connect
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// method doesn't belong to a 'PUBLIHSER' role
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if (isPublisher()) {
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// --- 4) Get your own camera stream ---
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var publisher = OV.initPublisher('video-container', {
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audio: true,
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video: true,
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quality: 'MEDIUM'
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});
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// When our HTML video has been added to DOM...
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publisher.on('videoElementCreated', function (event) {
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// Init the main video with ours and append our data
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var userData = {
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nickName: nickName,
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userName: userName
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};
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initMainVideo(event.element, userData);
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appendUserData(event.element, userData);
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$(event.element).prop('muted', true); // Mute lcoal video
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});
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// --- 5) Publish your stream ---
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session.publish(publisher);
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} else {
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console.warn('You don\'t have permissions to publish');
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initMainVideoThumbnail(); // Show SUBSCRIBER message in main video
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}
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} else {
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console.warn('There was an error connecting to the session:', error.code, error.message);
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}
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});
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$('#session-title').text(sessionName);
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$('#join').hide();
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$('#session').show();
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return false;
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});
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}
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function leaveSession() {
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// 6) Leave the session by calling 'disconnect' method over the Session object
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session.disconnect();
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session = null;
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// Removing all HTML elements with the user's nicknames
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cleanSessionView();
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$('#join').show();
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$('#session').hide();
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}
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/* OPENVIDU METHODS */
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/* APPLICATION REST METHODS */
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function logIn() {
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var user = $("#user").val(); // Username
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var pass = $("#pass").val(); // Password
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var jsonBody = JSON.stringify({ // Body of POST request
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'user': user,
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'pass': pass
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});
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userName = user;
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httpRequest('POST', '/api-login/login', jsonBody, 'Login WRONG', function successCallback(response){ // Send POST request
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console.warn(userName + ' login');
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$("#name-user").text(user);
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$("#not-logged").hide();
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$("#logged").show();
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// Random nickName and session
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$("#sessionName").val("Session " + Math.floor(Math.random() * 10));
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$("#participantName").val("Participant " + Math.floor(Math.random() * 100));
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});
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}
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function logOut() {
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httpRequest('GET', 'api-login/logout', null, 'Logout WRONG', function successCallback(response) {
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console.warn(userName + ' logout');
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$("#not-logged").show();
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$("#logged").hide();
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});
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}
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function getSessionIdAndToken(callback) {
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sessionName = $("#sessionName").val(); // Video-call chosen by the user
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nickName = $("#participantName").val(); // Nickname chosen by the user
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var jsonBody = JSON.stringify({ // Body of POST request
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'session': sessionName
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});
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// Send POST request
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httpRequest('POST', 'api-sessions/get-sessionid-token', jsonBody, 'Request of SESSIONID and TOKEN gone WRONG:', function successCallback(response) {
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sessionId = response[0]; // Get sessionId from response
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token = response[1]; // Get token from response
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console.warn('Request of SESSIONID and TOKEN gone WELL (SESSIONID:' + sessionId + ", TOKEN:" + token + ")");
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callback(); // Continue the join operation
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});
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}
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function removeUser() {
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// Body of POST request with the name of the session and the token of the leaving user
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var jsonBody = JSON.stringify({
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'sessionName': sessionName,
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'token': token
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});
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// Send POST request
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httpRequest('POST', 'api-sessions/remove-user', jsonBody, 'User couldn\'t be removed from session', function successCallback(response) {
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console.warn(userName + " correctly removed from session");
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});
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}
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function httpRequest(method, url, body, errorMsg, callback) {
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var http = new XMLHttpRequest();
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http.open(method, url, true);
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http.setRequestHeader('Content-type', 'application/json');
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http.addEventListener('readystatechange', processRequest, false);
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http.send(body);
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function processRequest() {
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if (http.readyState == 4) {
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if (http.status == 200) {
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try {
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callback(JSON.parse(http.responseText));
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} catch (e) {
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callback();
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}
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} else {
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console.warn(errorMsg);
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console.warn(http.responseText);
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}
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}
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}
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}
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/* APPLICATION REST METHODS */
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/* APPLICATION BROWSER METHODS */
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window.onbeforeunload = function () { // Gracefully leave session
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if (session) {
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removeUser();
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leaveSession();
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}
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logOut();
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}
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function appendUserData(videoElement, connection) {
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var clientData;
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var serverData;
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var nodeId;
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if (connection.nickName) { // Appending local video data
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clientData = connection.nickName;
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serverData = connection.userName;
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nodeId = 'main-videodata';
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} else {
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clientData = JSON.parse(connection.data.split('%/%')[0]).clientData;
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serverData = JSON.parse(connection.data.split('%/%')[1]).serverData;
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nodeId = connection.connectionId;
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}
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var dataNode = document.createElement('div');
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dataNode.className = "data-node";
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dataNode.id = "data-" + nodeId;
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dataNode.innerHTML = "<p class='nickName'>" + clientData + "</p><p class='userName'>" + serverData + "</p>";
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videoElement.parentNode.insertBefore(dataNode, videoElement.nextSibling);
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addClickListener(videoElement, clientData, serverData);
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}
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function removeUserData(connection) {
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var userNameRemoved = $("#data-" + connection.connectionId);
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if ($(userNameRemoved).find('p.userName').html() === $('#main-video p.userName').html()) {
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cleanMainVideo(); // The participant focused in the main video has left
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}
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$("#data-" + connection.connectionId).remove();
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}
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function removeAllUserData() {
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$(".data-node").remove();
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}
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function cleanMainVideo() {
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$('#main-video video').attr('src', '');
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$('#main-video p').each(function () {
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$(this).html('');
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});
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}
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function addClickListener(videoElement, clientData, serverData) {
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videoElement.addEventListener('click', function () {
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var mainVideo = $('#main-video video');
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if (mainVideo.attr('src') !== videoElement.src) {
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$('#main-video p.nickName').html(clientData);
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$('#main-video p.userName').html(serverData);
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mainVideo.attr('src', videoElement.src);
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}
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});
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}
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function initMainVideo(videoElement, userData) {
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$('#main-video video').attr("src", videoElement.src);
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$('#main-video p.nickName').html(userData.nickName);
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$('#main-video p.userName').html(userData.userName);
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$('#main-video video').prop('muted', true);
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}
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function initMainVideoThumbnail() {
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$('#main-video video').css("background", "url('images/subscriber-msg.jpg') round");
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}
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function isPublisher() {
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return userName.includes('publisher');
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}
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function cleanSessionView() {
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removeAllUserData();
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cleanMainVideo();
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$('#main-video video').css("background", "");
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}
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/* APPLICATION BROWSER METHODS */ |