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     IrcCommands      = require('./irc/commands.js'),
   8     ClientCommands   = require('./clientcommands.js');
   9
  10
  11 var Client = function (websocket) {
  12     var that = this;
  13
  14     events.EventEmitter.call(this);
  15     this.websocket = websocket;
  16
  17     // Clients address
  18     this.real_address = this.websocket.handshake.real_address;
  19
  20     // A hash to identify this client instance
  21     this.hash = crypto.createHash('sha256')
  22         .update(this.real_address)
  23         .update('' + Date.now())
  24         .update(Math.floor(Math.random() * 100000).toString())
  25         .digest('hex');
  26
  27     this.state = new State(this);
  28
  29     this.buffer = {
  30         list: [],
  31         motd: ''
  32     };
  33
  34     // Handler for any commands sent from the client
  35     this.client_commands = new ClientCommands(this);
  36
  37     websocket.on('irc', function () {
  38         handleClientMessage.apply(that, arguments);
  39     });
  40     websocket.on('kiwi', function () {
  41         kiwiCommand.apply(that, arguments);
  42     });
  43     websocket.on('disconnect', function () {
  44         websocketDisconnect.apply(that, arguments);
  45     });
  46     websocket.on('error', function () {
  47         websocketError.apply(that, arguments);
  48     });
  49 };
  50 util.inherits(Client, events.EventEmitter);
  51
  52 module.exports.Client = Client;
  53
  54 // Callback API:
  55 // Callbacks SHALL accept 2 arguments, error and response, in that order.
  56 // error MUST be null where the command is successul.
  57 // error MUST otherwise be a truthy value and SHOULD be a string where the cause of the error is known.
  58 // response MAY be given even if error is truthy
  59
  60 Client.prototype.sendIrcCommand = function (command, data, callback) {
  61     var c = {command: command, data: data};
  62     this.websocket.emit('irc', c, callback);
  63 };
  64
  65 Client.prototype.sendKiwiCommand = function (command, data, callback) {
  66     var c = {command: command, data: data};
  67     this.websocket.emit('kiwi', c, callback);
  68 };
  69
  70 Client.prototype.dispose = function () {
  71     this.emit('dispose');
  72     this.removeAllListeners();
  73 };
  74
  75 function handleClientMessage(msg, callback) {
  76     var server, args, obj, channels, keys;
  77
  78     // Make sure we have a server number specified
  79     if ((msg.server === null) || (typeof msg.server !== 'number')) {
  80         return (typeof callback === 'function') ? callback('server not specified') : undefined;
  81     } else if (!this.state.irc_connections[msg.server]) {
  82         return (typeof callback === 'function') ? callback('not connected to server') : undefined;
  83     }
  84
  85     // The server this command is directed to
  86     server = this.state.irc_connections[msg.server];
  87
  88     if (typeof callback !== 'function') {
  89         callback = null;
  90     }
  91
  92     try {
  93         msg.data = JSON.parse(msg.data);
  94     } catch (e) {
  95         kiwi.log('[handleClientMessage] JSON parsing error ' + msg.data);
  96         return;
  97     }
  98
  99     // Run the client command
 100     this.client_commands.run(msg.data.method, msg.data.args, server, callback);
 101 }
 102
 103
 104
 105
 106 function kiwiCommand(command, callback) {
 107     var that = this;
 108
 109     if (typeof callback !== 'function') {
 110         callback = function () {};
 111     }
 112     switch (command.command) {
 113         case 'connect':
 114             if (command.hostname && command.port && command.nick) {
 115                 var con;
 116
 117                 this.state.connect(
 118                     (global.config.restrict_server || command.hostname),
 119                     (global.config.restrict_server_port || command.port),
 120                     (global.config.restrict_server_ssl || command.ssl),
 121                     command.nick,
 122                     {hostname: this.websocket.handshake.revdns, address: this.websocket.handshake.real_address},
 123                     (global.config.restrict_server_password || command.password),
 124                     callback);
 125             } else {
 126                 return callback('Hostname, port and nickname must be specified');
 127             }
 128         break;
 129         default:
 130             callback();
 131     }
 132 }
 133
 134
 135 // Websocket has disconnected, so quit all the IRC connections
 136 function websocketDisconnect() {
 137     this.emit('disconnect');
 138
 139     this.dispose();
 140 }
 141
 142
 143 // TODO: Should this close all the websocket connections too?
 144 function websocketError() {
 145     this.dispose();
 146 }