server/client.js

   1 var util             = require('util'),
   2     events           = require('events'),
   3     crypto           = require('crypto'),
   4     _                = require('lodash'),
   5     State            = require('./irc/state.js');
   6     IrcConnection    = require('./irc/connection.js').IrcConnection,
   7     ClientCommands   = require('./clientcommands.js');
   8
   9
  10 var Client = function (websocket) {
  11     var that = this;
  12
  13     events.EventEmitter.call(this);
  14     this.websocket = websocket;
  15
  16     // Clients address
  17     this.real_address = this.websocket.handshake.real_address;
  18
  19     // A hash to identify this client instance
  20     this.hash = crypto.createHash('sha256')
  21         .update(this.real_address)
  22         .update('' + Date.now())
  23         .update(Math.floor(Math.random() * 100000).toString())
  24         .digest('hex');
  25
  26     this.state = new State(this);
  27
  28     this.buffer = {
  29         list: [],
  30         motd: ''
  31     };
  32
  33     // Handler for any commands sent from the client
  34     this.client_commands = new ClientCommands(this);
  35
  36     websocket.on('irc', function () {
  37         handleClientMessage.apply(that, arguments);
  38     });
  39     websocket.on('kiwi', function () {
  40         kiwiCommand.apply(that, arguments);
  41     });
  42     websocket.on('disconnect', function () {
  43         websocketDisconnect.apply(that, arguments);
  44     });
  45     websocket.on('error', function () {
  46         websocketError.apply(that, arguments);
  47     });
  48 };
  49 util.inherits(Client, events.EventEmitter);
  50
  51 module.exports.Client = Client;
  52
  53 // Callback API:
  54 // Callbacks SHALL accept 2 arguments, error and response, in that order.
  55 // error MUST be null where the command is successul.
  56 // error MUST otherwise be a truthy value and SHOULD be a string where the cause of the error is known.
  57 // response MAY be given even if error is truthy
  58
  59 Client.prototype.sendIrcCommand = function (command, data, callback) {
  60     var c = {command: command, data: data};
  61     this.websocket.emit('irc', c, callback);
  62 };
  63
  64 Client.prototype.sendKiwiCommand = function (command, data, callback) {
  65     var c = {command: command, data: data};
  66     this.websocket.emit('kiwi', c, callback);
  67 };
  68
  69 Client.prototype.dispose = function () {
  70     this.emit('dispose');
  71     this.removeAllListeners();
  72 };
  73
  74 function handleClientMessage(msg, callback) {
  75     var server;
  76
  77     // Make sure we have a server number specified
  78     if ((msg.server === null) || (typeof msg.server !== 'number')) {
  79         return (typeof callback === 'function') ? callback('server not specified') : undefined;
  80     } else if (!this.state.irc_connections[msg.server]) {
  81         return (typeof callback === 'function') ? callback('not connected to server') : undefined;
  82     }
  83
  84     // The server this command is directed to
  85     server = this.state.irc_connections[msg.server];
  86
  87     if (typeof callback !== 'function') {
  88         callback = null;
  89     }
  90
  91     try {
  92         msg.data = JSON.parse(msg.data);
  93     } catch (e) {
  94         kiwi.log('[handleClientMessage] JSON parsing error ' + msg.data);
  95         return;
  96     }
  97
  98     // Run the client command
  99     this.client_commands.run(msg.data.method, msg.data.args, server, callback);
 100 }
 101
 102
 103
 104
 105 function kiwiCommand(command, callback) {
 106     if (typeof callback !== 'function') {
 107         callback = function () {};
 108     }
 109
 110     switch (command.command) {
 111         case 'connect':
 112             if (command.hostname && command.port && command.nick) {
 113                 var con;
 114
 115                 this.state.connect(
 116                     (global.config.restrict_server || command.hostname),
 117                     (global.config.restrict_server_port || command.port),
 118                     (global.config.restrict_server_ssl || command.ssl),
 119                     command.nick,
 120                     {hostname: this.websocket.handshake.revdns, address: this.websocket.handshake.real_address},
 121                     (global.config.restrict_server_password || command.password),
 122                     callback);
 123             } else {
 124                 return callback('Hostname, port and nickname must be specified');
 125             }
 126         break;
 127         default:
 128             callback();
 129     }
 130 }
 131
 132
 133 // Websocket has disconnected, so quit all the IRC connections
 134 function websocketDisconnect() {
 135     this.emit('disconnect');
 136
 137     this.dispose();
 138 }
 139
 140
 141 // TODO: Should this close all the websocket connections too?
 142 function websocketError() {
 143     this.dispose();
 144 }