rip out chat component
This commit is contained in:
Michael Q Larson
71
app.js
71
app.js
@ -246,73 +246,4 @@ app.listen(app.get('port'), function() {
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console.log('Express server listening on port %d in %s mode', app.get('port'), app.get('env'));
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});
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module.exports = app;
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/**
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* Chat
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*/
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var usernames = {};
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var numUsers = 0;
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io.on('connection', function (socket) {
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var addedUser = false;
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// when the client emits 'new message', this listens and executes
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socket.on('new message', function (data) {
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// we tell the client to execute 'new message'
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socket.broadcast.emit('new message', {
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username: socket.username,
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message: data
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});
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});
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// when the client emits 'add user', this listens and executes
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socket.on('add user', function (username) {
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// we store the username in the socket session for this client
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socket.username = username;
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// add the client's username to the global list
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usernames[username] = username;
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++numUsers;
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addedUser = true;
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socket.emit('login', {
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numUsers: numUsers
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});
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// echo globally (all clients) that a person has connected
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socket.broadcast.emit('user joined', {
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username: socket.username,
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numUsers: numUsers
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});
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});
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// when the client emits 'typing', we broadcast it to others
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socket.on('typing', function () {
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socket.broadcast.emit('typing', {
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username: socket.username
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});
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});
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// when the client emits 'stop typing', we broadcast it to others
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socket.on('stop typing', function () {
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socket.broadcast.emit('stop typing', {
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username: socket.username
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});
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});
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// when the user disconnects.. perform this
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socket.on('disconnect', function () {
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// remove the username from global usernames list
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if (addedUser) {
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delete usernames[socket.username];
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--numUsers;
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// echo globally that this client has left
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socket.broadcast.emit('user left', {
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username: socket.username,
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numUsers: numUsers
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});
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}
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});
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});
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module.exports = app;
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@ -1,269 +0,0 @@
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$(document).ready(function() {
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var FADE_TIME = 150; // ms
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var TYPING_TIMER_LENGTH = 400; // ms
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var COLORS = [
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'#e21400', '#91580f', '#f8a700', '#f78b00',
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'#58dc00', '#287b00', '#a8f07a', '#4ae8c4',
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'#3b88eb', '#3824aa', '#a700ff', '#d300e7'
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];
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// Initialize varibles
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var $window = $(window);
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var $usernameInput = $('.usernameInput'); // Input for username
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var $messages = $('.messages'); // Messages area
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var $inputMessage = $('.inputMessage'); // Input message input box
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var $loginPage = $('.login.page'); // The login page
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var $chatPage = $('.chat.page'); // The chatroom page
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// Prompt for setting a username
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var username;
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var connected = false;
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var typing = false;
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var lastTypingTime;
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var $currentInput = $usernameInput.focus();
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var socket = io("http://localhost:2999");
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function addParticipantsMessage (data) {
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var message = '';
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if (data.numUsers === 1) {
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message += "there's 1 participant";
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} else {
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message += "there are " + data.numUsers + " participants";
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}
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log(message);
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}
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// Sets the client's username
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function setUsername () {
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username = auth.username;
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// If the username is valid
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if (username) {
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$loginPage.fadeOut();
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$chatPage.show();
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$loginPage.off('click');
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$currentInput = $inputMessage.focus();
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// Tell the server your username
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socket.emit('add user', username);
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}
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}
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// Sends a chat message
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function sendMessage () {
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var message = $inputMessage.val();
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// Prevent markup from being injected into the message
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message = cleanInput(message);
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// if there is a non-empty message and a socket connection
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if (message && connected) {
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$inputMessage.val('');
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addChatMessage({
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username: username,
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message: message
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});
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// tell server to execute 'new message' and send along one parameter
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socket.emit('new message', message);
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}
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}
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// Log a message
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function log (message, options) {
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var $el = $('<li>').addClass('log').text(message);
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addMessageElement($el, options);
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}
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// Adds the visual chat message to the message list
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function addChatMessage (data, options) {
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// Don't fade the message in if there is an 'X was typing'
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var $typingMessages = getTypingMessages(data);
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options = options || {};
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if ($typingMessages.length !== 0) {
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options.fade = false;
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$typingMessages.remove();
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}
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var $usernameDiv = $('<span class="username"/>')
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.text(data.username)
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.css('color', getUsernameColor(data.username));
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var $messageBodyDiv = $('<span class="messageBody">')
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.text(data.message);
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var typingClass = data.typing ? 'typing' : '';
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var $messageDiv = $('<li class="message"/>')
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.data('username', data.username)
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.addClass(typingClass)
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.append($usernameDiv, $messageBodyDiv);
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addMessageElement($messageDiv, options);
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}
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// Adds the visual chat typing message
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function addChatTyping (data) {
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data.typing = true;
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data.message = 'is typing';
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addChatMessage(data);
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}
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// Removes the visual chat typing message
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function removeChatTyping (data) {
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getTypingMessages(data).fadeOut(function () {
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$(this).remove();
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});
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}
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// Adds a message element to the messages and scrolls to the bottom
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// el - The element to add as a message
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// options.fade - If the element should fade-in (default = true)
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// options.prepend - If the element should prepend
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// all other messages (default = false)
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function addMessageElement (el, options) {
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var $el = $(el);
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// Setup default options
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if (!options) {
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options = {};
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}
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if (typeof options.fade === 'undefined') {
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options.fade = true;
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}
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if (typeof options.prepend === 'undefined') {
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options.prepend = false;
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}
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// Apply options
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if (options.fade) {
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$el.hide().fadeIn(FADE_TIME);
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}
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if (options.prepend) {
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$messages.prepend($el);
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} else {
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$messages.append($el);
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}
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$messages[0].scrollTop = $messages[0].scrollHeight;
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}
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// Prevents input from having injected markup
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function cleanInput (input) {
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return $('<div/>').text(input).text();
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}
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// Updates the typing event
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function updateTyping () {
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if (connected) {
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if (!typing) {
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typing = true;
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socket.emit('typing');
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}
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lastTypingTime = (new Date()).getTime();
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setTimeout(function () {
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var typingTimer = (new Date()).getTime();
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var timeDiff = typingTimer - lastTypingTime;
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if (timeDiff >= TYPING_TIMER_LENGTH && typing) {
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socket.emit('stop typing');
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typing = false;
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}
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}, TYPING_TIMER_LENGTH);
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}
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}
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// Gets the 'X is typing' messages of a user
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function getTypingMessages (data) {
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return $('.typing.message').filter(function (i) {
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return $(this).data('username') === data.username;
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});
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}
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// Gets the color of a username through our hash function
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function getUsernameColor (username) {
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// Compute hash code
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var hash = 7;
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for (var i = 0; i < username.length; i++) {
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hash = username.charCodeAt(i) + (hash << 5) - hash;
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}
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// Calculate color
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var index = Math.abs(hash % COLORS.length);
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return COLORS[index];
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}
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// Keyboard events
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$window.keydown(function (event) {
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// Auto-focus the current input when a key is typed
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if (!(event.ctrlKey || event.metaKey || event.altKey)) {
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$currentInput.focus();
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}
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// When the client hits ENTER on their keyboard
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if (event.which === 13) {
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if (username) {
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sendMessage();
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socket.emit('stop typing');
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typing = false;
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} else {
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setUsername();
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}
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}
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});
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$inputMessage.on('input', function() {
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updateTyping();
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});
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// Click events
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// Focus input when clicking anywhere on login page
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$loginPage.click(function () {
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$currentInput.focus();
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});
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// Focus input when clicking on the message input's border
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$inputMessage.click(function () {
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$inputMessage.focus();
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});
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// Socket events
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// Whenever the server emits 'login', log the login message
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socket.on('login', function (data) {
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connected = true;
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// Display the welcome message
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var message = "Welcome to Socket.IO Chat – ";
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log(message, {
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prepend: true
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});
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addParticipantsMessage(data);
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});
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// Whenever the server emits 'new message', update the chat body
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socket.on('new message', function (data) {
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addChatMessage(data);
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});
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// Whenever the server emits 'user joined', log it in the chat body
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socket.on('user joined', function (data) {
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log(data.username + ' joined');
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addParticipantsMessage(data);
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});
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// Whenever the server emits 'user left', log it in the chat body
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socket.on('user left', function (data) {
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log(data.username + ' left');
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addParticipantsMessage(data);
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removeChatTyping(data);
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});
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// Whenever the server emits 'typing', show the typing message
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socket.on('typing', function (data) {
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addChatTyping(data);
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});
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// Whenever the server emits 'stop typing', kill the typing message
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socket.on('stop typing', function (data) {
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removeChatTyping(data);
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});
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});
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@ -9,29 +9,4 @@ block content
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li= course.name
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script(type="text/javascript") var username = '#{username}';
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//ul.pages
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// li.chat.page
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// div.chatArea
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// ul.messages
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// input.inputMessage(placeholder='Type here...')
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// li.login.page
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// div.form
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// h3.title What's your nickname?
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// input.usernameInput(type='text', maxlength='14')
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// for course in courses
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// p #{course.name}
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// .row
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// .col-sm-6
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// h3 Your Curriculum
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// .col-sm-6
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// .chat
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// .chat-messages
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// .chat-input.row
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// .col-sm-3
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// input.usernameInput(placeholder='Nickanem', type='text', maxlength='14')
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// .col-sm-9
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// input.inputMessage(placeholder='Type here...')
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//
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// https://www.hipchat.com/invite/178107/cc2f6ea4dfac9e48b9a88b305adae48a
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