cryptalk/public/js/cryptalk_modules/console.js

/*

	Accepts:
		mediator.on('console:clear', clear);
		mediator.on('console:torch', ttl)
		mediator.on('console:motd', motd);
		mediator.on('console:info', info);
		mediator.on('console:error', error);
		mediator.on('console:server', server);
		mediator.on('console:message', message);
		mediator.on('console:lockinput', lockInput);
		mediator.on('console:unlockInput', unlockInput);
		mediator.on('console:param', param);

	Emits:
		mediator.emit('notification:send',...);
		mediator.emit('audio:play',...);
		ToDo
*/
define({
	compiles: ['$'],
	requires: ['castrato', 'fandango', 'settings', 'templates', 'sounds', 'room', 'notifications', 'audio']
}, function ($, requires, data) {

	var // Require shortcuts
		fandango = requires.fandango,
		mediator = requires.castrato,
		settings = requires.settings,
		templates = requires.templates,
		sounds = requires.sounds,

		// Collection of DOM components
		components = {
			chat: 	$('#chat'),
			input: 	$('#input'),
			inputWrapper: $('#input_wrapper')
		},

		// Collection of parameters
		parameters = {},

		// Adds a new message to the DOM
		commands = {
			post: function (type, text, nick) {
				var tpl = templates.post[type],
					uniqueId = 'msg_' + new Date().getTime() + '_' + Math.round(Math.random()*1000000),
					post,
					data = fandango.merge({}, settings, {
						nick: nick,
						timestamp: new Date().toLocaleTimeString(),
						id: uniqueId
					});

				data.text = $.template(text, data);
				post = $.template(tpl, data);

				// Request a notification
				commands.showNotification(type, nick, text);

				// Expire message
				setTimeout(function() {
					var parent = components.chat.first(),
						child = $('#'+uniqueId).first();
					parent.removeChild(child);
				}, settings.ttl);

				// Append the post to the chat DOM element
				components.chat.append(post);
			},

			torch: function (ttl) {
				var ttl = parseInt(ttl);
				if( ttl > 0 && ttl < 3600) {
					mediator.emit('console:info', $.template(templates.messages.torch_is_now, { ttl: ttl }) );
					settings.ttl = ttl*1000;
				} else {
					mediator.emit('console:error', $.template(templates.messages.torch_not_set) );
				}
			},

			param: function (p) {
				parameters = fandango.merge({}, parameters, p);
			},

			showNotification: function (type, nick, text) {
				var title = type !== 'message' ? 'Cryptalk' : nick,
					icon = type === 'message'? 'gfx/icon_128x128.png' : (type == 'error' ? 'gfx/icon_128x128_error.png' : 'gfx/icon_128x128_info.png');

				// Emit notification
				mediator.emit('notification:send', { 
					title: 	title.substring(0, 20), 
					body: 	text.substring(0, 80), 
					icon: 	icon
				});

				// Emit sound
				if (type === 'message') {
					mediator.emit('audio:play', sounds.message);
				}
			},

			motd: function (message) {
				commands.post('motd', message);
			},

			info: function (message) {
				commands.post('info', message);
			},

			error: function (message) {
				commands.post('error', message);
			},

			server: function (message) {
				commands.post('server', message);
			},

			message: function (data) {
				commands.post('message', data.message, data.nick);
			},

			clearInput: function () {  
				fandango.subordinate(function () {
					components.input[0].value = '';
				});
			},

			clear: function () { 
				fandango.subordinate(function () {
					components.chat[0].innerHTML = '';
				});
			},

			lockInput: function () {
				components.input[0].setAttribute('disabled', 'disabled');
				components.inputWrapper[0].className = 'loading';
			},

			unlockInput: function () {
				components.input[0].removeAttribute('disabled');
				components.inputWrapper[0].className = '';
				components.input.focus();
			},

			_require: function (filepath, done) {
				commands.lockInput();
				commands.post('info', 'Requiring ' + filepath + '...');
				require([filepath], function () {
					commands.post('info', 'Successfully required ' + filepath + '.');
					commands.unlockInput();
					done();
				}, function (e) {
					commands.post('error', 'An error occurred while trying to load "' + filepath + '":\n' + e);
					commands.unlockInput();
					done();
				});
			}
		},

		// Handler for the document`s keyDown-event.
		onKeyDown = function (e) {
			var buffer,
				parts,
				payload,
				command,
				save;

			// The Document object is bound to this element.
			// If the active element is not the input, focus on it and exit the function.
			// Ignore this when ctrl and/or alt is pressed!
			if (!e.ctrlKey && !e.altKey && components.input[0] !== $.activeElement()) {
				return components.input.focus();
			}

			// Return immediatly if the buffer is empty or if the hit key was not <enter>
			if (e.keyCode !== 13 || !(buffer = components.input[0].value)) {
				return;
			}

			// Handle command
			if ((buffer[0] || buffer.slice(0, 1)) === '/') {
				parts = $.ssplit(buffer.slice(1), ' ');
				command = parts[0];
				payload = parts[1];

				// Shout this command to all modules
				mediator.emit(
					'command:' + command,
					payload,
					function(retvals, recipients) {
						if(!recipients) {
							return commands.post('error', $.template(templates.messages.unrecognized_command, { commandName: command }));
						} else {
							commands.clearInput();
						}
					}
				);

			} else /* Handle ordinary message */ {

				if(!parameters.room || !parameters.key ) {
					// Make sure that the user has joined a room and the key is set
					return (!parameters.room) ? commands.post('error', templates.messages.msg_no_room) : commands.post('error', templates.messages.msg_no_key);
				}

				// Before sending the message.
				// Encrypt message using room UUID as salt and key as pepper.
				mediator.emit(
					'socket:emit',
					{ 
						data: 'message:send', 
						payload: {
							room: $.SHA1(parameters.room),
							msg: $.AES.encrypt(buffer, $.SHA1(parameters.room) + parameters.key).toString(),
							nick: parameters.nick ? $.AES.encrypt(parameters.nick, $.SHA1(parameters.room) + parameters.key).toString() : false
						}
					}
				);

				// And clear the the buffer
				commands.clearInput();
			}
		};

	// Bind the necessary DOM events
	$(document).on('keydown', onKeyDown);

	// Put focus on the message input
	components.input.focus();

	// Connect events
	for (var commandName in commands) {
		if (commandName !== '_require' && commandName !== 'post') {
			mediator.on('console:' + commandName, commands[commandName]);
		}
	}

	mediator.on('console:require', commands._require);

	mediator.on('console:post', function (data) {
		commands.post(data.type, data.data, data.nick);
	});
});