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/*
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* NOTE: the /mod/chat/gui_header_js/ is not a real plugin,
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* ideally this code should be in /mod/chat/module.js
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*/
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/**
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* @namespace M.mod_chat_ajax
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*/
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M.mod_chat_ajax = M.mod_chat_ajax || {};
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/**
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* Init ajax based Chat UI.
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* @namespace M.mod_chat_ajax
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* @function
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* @param {YUI} Y
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* @param {Object} cfg configuration data
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*/
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M.mod_chat_ajax.init = function(Y, cfg) {
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var gui_ajax = {
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// Properties.
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api : M.cfg.wwwroot + '/mod/chat/chat_ajax.php?sesskey=' + M.cfg.sesskey, // The path to the ajax callback script.
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cfg : {}, // A configuration variable.
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interval : null, // The interval object for refreshes.
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layout : null, // A reference to the layout used in this module.
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messages : [], // An array of messages.
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scrollable : true, // True is scrolling should occur.
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thememenu : null, // A reference to the menu for changing themes.
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// Elements
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messageinput : null,
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sendbutton : null,
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messagebox : null,
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init : function(cfg) {
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this.cfg = cfg;
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this.cfg.req_count = this.cfg.req_count || 0;
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participantswidth = 180;
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if (Y.one('#input-message').get('docWidth') < 640) {
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participantswidth = 120;
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}
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this.layout = new Y.YUI2.widget.Layout({
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units : [
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{position: 'right', width: participantswidth, resize: true, gutter: '1px', scroll: true, body: 'chat-userlist', animate: false},
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{position: 'bottom', height: 42, resize: false, body: 'chat-input-area', gutter: '1px', collapse: false, resize: false},
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{position: 'center', body: 'chat-messages', gutter: '0px', scroll: true}
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]
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});
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this.layout.on('render', function() {
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var unit = this.getUnitByPosition('right');
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if (unit) {
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unit.on('close', function() {
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closeLeft();
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});
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}
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}, this.layout);
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this.layout.render();
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// Gather the general elements.
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this.messageinput = Y.one('#input-message');
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this.sendbutton = Y.one('#button-send');
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this.messagebox = Y.one('#chat-messages');
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// Set aria attributes to messagebox and chat-userlist.
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this.messagebox.set('role', 'log');
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this.messagebox.set('aria-live', 'polite');
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var userlist = Y.one('#chat-userlist');
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userlist.set('aria-live', 'polite');
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userlist.set('aria-relevant', 'all');
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// Attach the default events for this module.
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this.sendbutton.on('click', this.send, this);
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this.messagebox.on('mouseenter', function() {
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this.scrollable = false;
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}, this);
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this.messagebox.on('mouseleave', function() {
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this.scrollable = true;
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}, this);
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// Send the message when the enter key is pressed.
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Y.on('key', this.send, this.messageinput, 'press:13', this);
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document.title = this.cfg.chatroom_name;
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// Prepare and execute the first AJAX request of information.
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Y.io(this.api,{
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method : 'POST',
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data : build_querystring({
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action : 'init',
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chat_init : 1,
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chat_sid : this.cfg.sid,
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chat_theme : this.cfg.theme
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}),
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on : {
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success : function(tid, outcome) {
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this.messageinput.removeAttribute('disabled');
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this.messageinput.set('value', '');
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this.messageinput.focus();
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try {
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var data = Y.JSON.parse(outcome.responseText);
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} catch (ex) {
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return;
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}
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this.update_users(data.users);
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}
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},
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context : this
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});
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var scope = this;
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this.interval = setInterval(function() {
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scope.update_messages();
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}, this.cfg.timer, this);
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// Create and initalise theme changing menu.
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this.thememenu = new Y.YUI2.widget.Menu('basicmenu', {xy:[0,0]});
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this.thememenu.addItems([
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{text: M.util.get_string('bubble', 'mod_chat'), url: this.cfg.chaturl + '&chat_theme=bubble'},
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{text: M.util.get_string('compact', 'mod_chat'), url: this.cfg.chaturl + '&chat_theme=compact'},
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{text: M.util.get_string('coursetheme', 'mod_chat'), url: this.cfg.chaturl + '&chat_theme=course_theme'}
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]);
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this.thememenu.render(document.body);
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Y.one('#choosetheme').on('click', function(e) {
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this.moveTo((e.pageX - 20), (e.pageY - 20));
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this.show();
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}, this.thememenu);
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// Set the data-placement for the help-icon to display all the content.
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this.helpicon = Y.one('#button-send + a');
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this.dataset = this.helpicon.get('dataset');
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this.dataset.placement = 'top';
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this.helpicon.set('dataset', this.dataset);
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},
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append_message : function(key, message, row) {
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var item = Y.Node.create('<li id="mdl-chat-entry-' + key + '">' + message.message + '</li>');
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item.addClass((message.mymessage) ? 'mdl-chat-my-entry' : 'mdl-chat-entry');
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Y.one('#messages-list').append(item);
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if (message.type && message.type == 'beep') {
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var audioElement = document.createElement('audio');
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audioElement.setAttribute('src', '../beep.mp3');
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audioElement.play();
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}
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},
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send : function(e, beep) {
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if((this.messageinput.get('value') != '') || (typeof beep != 'undefined')) {
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this.sendbutton.set('value', M.util.get_string('sending', 'chat'));
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var data = {
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chat_message : (!beep) ? this.messageinput.get('value') : '',
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chat_sid : this.cfg.sid,
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chat_theme : this.cfg.theme
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};
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if (beep) {
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data.beep = beep
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}
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data.action = 'chat';
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Y.io(this.api, {
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method : 'POST',
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data : build_querystring(data),
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on : {
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success : this.send_callback
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},
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context : this
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});
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}
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},
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send_callback : function(tid, outcome, args) {
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try {
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var data = Y.JSON.parse(outcome.responseText);
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} catch (ex) {
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return;
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}
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this.sendbutton.set('value', M.util.get_string('send', 'chat'));
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this.messageinput.set('value', '');
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clearInterval(this.interval);
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this.update_messages();
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var scope = this;
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this.interval = setInterval(function() {
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scope.update_messages();
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}, this.cfg.timer, this);
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},
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talkto: function (e, name) {
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this.messageinput.set('value', "To " + name + ": ");
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this.messageinput.focus();
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},
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update_messages : function() {
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this.cfg.req_count++;
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Y.io(this.api, {
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method : 'POST',
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data : build_querystring({
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action: 'update',
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chat_lastrow : this.cfg.chat_lastrow || false,
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chat_lasttime : this.cfg.chat_lasttime,
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chat_sid : this.cfg.sid,
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chat_theme : this.cfg.theme
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}),
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on : {
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success : this.update_messages_callback
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},
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context : this
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});
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},
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update_messages_callback : function(tid, outcome) {
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try {
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var data = Y.JSON.parse(outcome.responseText);
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} catch (ex) {
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return;
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}
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if (data.error) {
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clearInterval(this.interval);
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alert(data.error);
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window.location = this.cfg.home;
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}
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this.cfg.chat_lasttime = data.lasttime;
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this.cfg.chat_lastrow = data.lastrow;
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// Update messages.
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for (var key in data.msgs){
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if (!M.util.in_array(key, this.messages)) {
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this.messages.push(key);
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this.append_message(key, data.msgs[key], data.lastrow);
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}
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}
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// Update users.
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this.update_users(data.users);
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// Scroll to the bottom of the message list
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if (this.scrollable) {
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Y.Node.getDOMNode(this.messagebox).parentNode.scrollTop += 500;
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}
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this.messageinput.focus();
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},
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update_users : function(users) {
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if (!users) {
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return;
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}
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var list = Y.one('#users-list');
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list.get('children').remove();
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for (var i in users) {
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var li = Y.Node.create('<li><table><tr><td>' + users[i].picture + '</td><td></td></tr></table></li>');
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if (users[i].id == this.cfg.userid) {
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li.all('td').item(1).append(Y.Node.create('<strong><a target="_blank" href="' + users[i].url + '">' + users[i].name + '</a></strong>'));
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} else {
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li.all('td').item(1).append(Y.Node.create('<div><a target="_blank" href="' + users[i].url + '">' + users[i].name + '</a></div>'));
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var talk = Y.Node.create('<a href="###">' + M.util.get_string('talk', 'chat') + '</a>');
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talk.on('click', this.talkto, this, users[i].name);
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var beep = Y.Node.create('<a href="###">' + M.util.get_string('beep', 'chat') + '</a>');
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beep.on('click', this.send, this, users[i].id);
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li.all('td').item(1).append(Y.Node.create('<div></div>').append(talk).append(' ').append(beep));
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}
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list.append(li);
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}
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}
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};
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gui_ajax.init(cfg);
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};
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