diff -r 000000000000 -r d02690a8552c libirc.php
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/libirc.php	Sat Mar 15 19:53:27 2008 -0400
@@ -0,0 +1,476 @@
+<?php
+
+/**
+ * PHP IRC Client library
+ * Copyright (C) 2008 Dan Fuhry. All rights reserved.
+ */
+
+/**
+ * Version number
+ * @const string
+ */
+
+define('REQUEST_IRC_VERSION', '0.1');
+
+/**
+ * The base class for an IRC session.
+ */
+
+class Request_IRC
+{
+  
+  /**
+   * Hostname
+   * @var string
+   */
+  
+  private $host = '';
+  
+  /**
+   * Port number
+   * @var int
+   */
+  
+  private $port = 6667;
+  
+  /**
+   * The socket for the connection.
+   * @var resource
+   */
+  
+  public $sock = false;
+  
+  /**
+   * Channel objects, associative array
+   * @var array
+   */
+  
+  public $channels = array();
+  
+  /**
+   * The function called when a private message is received.
+   * @var string
+   */
+  
+  private $privmsg_handler = false;
+  
+  /**
+   * Switch to track if quitted or not. Helps avoid quitting the connection twice thus causing write errors.
+   * @var bool
+   * @access private
+   */
+  
+  protected $quitted = false;
+  
+  /**
+   * The nickname we're connected as. Not modified once connected.
+   * @var string
+   */
+  
+  public $nick = '';
+  
+  /**
+   * The username we're connected as. Not modified once connected.
+   * @var string
+   */
+  
+  public $user = '';
+  
+  /**
+   * Constructor.
+   * @param string Hostname
+   * @param int Port number, defaults to 6667
+   */
+  
+  public function __construct($host, $port = 6667)
+  {
+    // Check hostname
+    if ( !preg_match('/^(([a-z0-9-]+\.)*?)([a-z0-9-]+)$/', $host) )
+      die(__CLASS__ . ': Invalid hostname');
+    $this->host = $host;
+    
+    // Check port
+    if ( is_int($port) && $port >= 1 && $port <= 65535 )
+      $this->port = $port;
+    else
+      die(__CLASS__ . ': Invalid port');
+  }
+  
+  /**
+   * Sets parameters and opens the connection.
+   * @param string Nick
+   * @param string User
+   * @param string Real name
+   * @param string NickServ password
+   * @param int Flags, defaults to 0.
+   */
+  
+  public function connect($nick, $username, $realname, $pass, $flags = 0)
+  {
+    // Init connection
+    $this->sock = fsockopen($this->host, $this->port);
+    if ( !$this->sock )
+      throw new Exception('Could not make socket connection to host.');
+    
+    stream_set_timeout($this->sock, 5);
+    
+    // Wait for initial ident messages
+    while ( $msg = $this->get() )
+    {
+    }
+    
+    // Send nick and username
+    $this->put("NICK $nick\r\n");
+    $this->put("USER $username 0 * :$realname\r\n");
+    
+    // Wait for response and end of motd
+    $motd = '';
+    while ( $msg = $this->get() )
+    {
+      // Match particles
+      $msg = trim($msg);
+      $mc = preg_match('/^:([A-z0-9\.-]+) ([0-9]+) [A-z0-9_-]+ :(.+)$/', $msg, $match);
+      if ( !$mc )
+      {
+        $mc = preg_match('/^:([A-z0-9_-]+)!([A-z0-9_-]+)@([A-z0-9_\.-]+) NOTICE [A-z0-9_-]+ :(.+)$/', $msg, $match);
+        if ( !$mc )
+          continue;
+        // Look for a response from NickServ
+        if ( $match[1] == 'NickServ' )
+        {
+          // Asking for auth?
+          if ( strpos($match[4], 'IDENTIFY') )
+          {
+            // Yes, send password
+            $this->privmsg('NickServ', "IDENTIFY $pass");
+          }
+        }
+      }
+      list(, $host, $stat, $msg) = $match;
+      $motd .= "$msg";
+    }
+    
+    $this->nick = $nick;
+    $this->user = $username;
+  }
+  
+  /**
+   * Writes some data to the socket, abstracted for debugging purposes.
+   * @param string Message to send, this should include a CRLF.
+   */
+  
+  public function put($message)
+  {
+    if ( !$this->sock )
+    {
+      if ( defined('LIBIRC_DEBUG') )
+        echo ">>> WRITE FAILED: $message";
+      return false;
+    }
+    if ( defined('LIBIRC_DEBUG') )
+      echo ">>> $message";
+    fwrite($this->sock, $message);
+  }
+  
+  /**
+   * Reads from the socket...
+   * @return string
+   */
+  
+  public function get()
+  {
+    if ( !$this->sock )
+    {
+      if ( defined('LIBIRC_DEBUG') )
+        echo "<<< READ FAILED\n";
+      return false;
+    }
+    $out = fgets($this->sock, 4096);
+    if ( defined('LIBIRC_DEBUG') )
+      if ( !empty($out) )
+        echo "<<< $out";
+    return $out;
+  }
+  
+  /**
+   * Sends a message to a nick or channel.
+   * @param string Nick or channel
+   * @param string Message
+   */
+  
+  public function privmsg($nick, $message)
+  {
+    $message = str_replace("\r\n", "\n", $message);
+    $message = explode("\n", $message);
+    foreach ( $message as $line )
+    {
+      $this->put("PRIVMSG $nick :$line\r\n");
+    }
+  }
+  
+  /**
+   * The main event loop.
+   */
+  
+  public function event_loop()
+  {
+    stream_set_timeout($this->sock, 0xFFFFFFFE);
+    while ( $data = $this->get() )
+    {
+      $data_trim = trim($data);
+      $match = self::parse_message($data_trim);
+      if ( preg_match('/^PING :(.+?)$/', $data_trim, $pmatch) )
+      {
+        $this->put("PONG :{$pmatch[1]}\r\n");
+      }
+      else if ( $match )
+      {
+        // Received PRIVMSG or other mainstream action
+        if ( $match['action'] == 'JOIN' )
+          $channel =& $match['message'];
+        else
+          $channel =& $match['target'];
+          
+        if ( !preg_match('/^[#!&\+]/', $channel) )
+        {
+          // Private message from user
+          $result = $this->handle_privmsg($data);
+          stream_set_timeout($this->sock, 0xFFFFFFFE);
+        }
+        else if ( isset($this->channels[strtolower($channel)]) )
+        {
+          // Message into channel
+          $chan =& $this->channels[strtolower($channel)];
+          $func = $chan->get_handler();
+          $result = @call_user_func($func, $data, $chan);
+          stream_set_timeout($this->sock, 0xFFFFFFFE);
+        }
+        if ( $result == 'BREAK' )
+        {
+          break;
+        }
+      }
+    }
+  }
+  
+  /**
+   * Processor for when a private message is received.
+   * @access private
+   */
+  
+  private function handle_privmsg($message)
+  {
+    $message = self::parse_message($message);
+    $ph = $this->privmsg_handler;
+    if ( @function_exists($ph) )
+      return @call_user_func($ph, $message);
+  }
+  
+  /**
+   * Changes the function called upon receipt of a private message.
+   * @param string Function to call, will be passed a parsed message.
+   */
+  
+  function set_privmsg_handler($func)
+  {
+    if ( !function_exists($func) )
+      return false;
+    $this->privmsg_handler = $func;
+    return true;
+  }
+  
+  /**
+   * Parses a message line.
+   * @param string Message text
+   * @return array Associative with keys: nick, user, host, action, target, message
+   */
+   
+  public static function parse_message($message)
+  {
+    // Indices:          12       3       4        5        67                         8
+    $mc = preg_match('/^:(([^ ]+)!([^ ]+)@([^ ]+)) ([A-Z]+) (([#!&\+]*[A-z0-9_-]+) )?:?(.*?)$/', $message, $match);
+    if ( !$mc )
+    {
+      return false;
+    }
+    // Indices: 0 1 2      3      4      5        6 7        8
+    list(       , , $nick, $user, $host, $action, , $target, $message) = $match;
+    return array(
+        'nick' => $nick,
+        'user' => $user,
+        'host' => $host,
+        'action' => $action,
+        'target' => $target,
+        'message' => trim($message)
+      );
+  }
+  
+  /**
+   * Joins a channel, and returns a Request_IRC_Channel object.
+   * @param string Channel name (remember # prefix)
+   * @param string Event handler function, will be called with param 0 = socket output and param 1 = channel object
+   * @return object
+   */
+  
+  function join($channel, $handler)
+  {
+    $chan = new Request_IRC_Channel(strtolower($channel), $handler, $this);
+    $this->channels[strtolower($channel)] = $chan;
+    return $chan;
+  }
+  
+  /**
+   * Closes the connection and quits.
+   * @param string Optional part message
+   */
+  
+  public function close($partmsg = false)
+  {
+    if ( $this->quitted )
+      return true;
+    
+    $this->quitted = true;
+    // Part all channels
+    if ( !$partmsg )
+      $partmsg = 'IRC bot powered by PHP/' . PHP_VERSION . ' libirc/' . REQUEST_IRC_VERSION;
+    
+    foreach ( $this->channels as $channel )
+    {
+      $channel->part($partmsg);
+    }
+    
+    $this->put("QUIT\r\n");
+    
+    while ( $msg = $this->get() )
+    {
+      // Do nothing.
+    }
+    
+    fclose($this->sock);
+  }
+  
+}
+
+/**
+ * Wrapper for channels.
+ */
+
+class Request_IRC_Channel extends Request_IRC
+{
+  
+  /**
+   * The name of the channel
+   * @var string
+   */
+  
+  private $channel_name = '';
+  
+  /**
+   * The event handler function.
+   * @var string
+   */
+  
+  private $handler = '';
+  
+  /**
+   * The parent connection.
+   * @var object
+   */
+  
+  public $parent = false;
+  
+  /**
+   * Whether the channel has been parted or not, used to kill the destructor.
+   * @var bool
+   */
+  
+  protected $parted = false;
+  
+  /**
+   * Constructor.
+   * @param string Channel name
+   * @param string Handler function
+   * @param object IRC connection (Request_IRC object)
+   */
+  
+  function __construct($channel, $handler, $parent)
+  {
+    $this->parent = $parent;
+    $this->parent->put("JOIN $channel\r\n");
+    stream_set_timeout($this->parent->sock, 3);
+    while ( $msg = $this->parent->get() )
+    {
+      // Do nothing
+    }
+    $this->channel_name = $channel;
+    $this->handler = $handler;
+  }
+  
+  /**
+   * Returns the channel name
+   * @return string
+   */
+  
+  function get_channel_name()
+  {
+    return $this->channel_name;
+  }
+  
+  /**
+   * Returns the handler function
+   * @return string
+   */
+  
+  function get_handler()
+  {
+    return $this->handler;
+  }
+  
+  /**
+   * Sends a message.
+   * @param string message
+   * @param bool If true, will fire a message event when the message is sent.
+   */
+  
+  function msg($msg, $fire_event = false)
+  {
+    $this->parent->privmsg($this->channel_name, $msg);
+    if ( $fire_event )
+    {
+      $func = $this->get_handler();
+      // format: :nick!user@host PRIVMSG #channel :msg.
+      $lines = explode("\n", $msg);
+      foreach ( $lines as $line )
+      {
+        $data = ":{$this->parent->nick}!{$this->parent->user}@localhost PRIVMSG {$this->channel_name} :$line";
+        $result = @call_user_func($func, $data, $this);
+        stream_set_timeout($this->parent->sock, 0xFFFFFFFE);
+      }
+    }
+  }
+  
+  /**
+   * Destructor, automatically parts the channel.
+   */
+  
+  function __destruct()
+  {
+    if ( !$this->parted )
+      $this->part('IRC bot powered by PHP/' . PHP_VERSION . ' libirc/' . REQUEST_IRC_VERSION);
+  }
+  
+  /**
+   * Parts the channel.
+   * @param string Optional message
+   */
+  
+  function part($msg = '')
+  {
+    $this->parent->put("PART {$this->channel_name} :$msg\r\n");
+    $this->parted = true;
+    unset($this->parent->channels[$this->channel_name]);
+  }
+  
+}
+
+?>