<?php

/**

 * EnanoBot - the Enano CMS IRC logging and help automation bot

 * GPL and no warranty, see the LICENSE file for more info

 */

// parse command line

if ( isset($argv[1]) )

{

  $arg =& $argv[1];

  if ( $arg == '--daemon' || $arg == '-d' )

  {

    // attempt to fork...

    if ( function_exists('pcntl_fork') )

    {

      $pid = pcntl_fork();

      if ( $pid == -1 )

      {

        echo "Forking process failed.\n";

        exit(1);

      }

      else if ( $pid )

      {

        echo "EnanoBot daemon started, pid $pid\n";

        exit(0);

      }

      else

      {

        // do nothing, just continue.

      }

    }

    else

    {

      echo "No pcntl support in PHP, continuing in foreground\n";

    }

  }

  else if ( $arg == '-v' || $arg == '--verbose' )

  {

    define('LIBIRC_DEBUG', '');

  }

  else

  {

    echo <<<EOF

Usage: {$argv[0]}

Options:

  -d, --daemon     Run in background (requires pcntl support)

  -v, --verbose    Log communication to stdout (ignored if -d specified)

  -h, --help       This help message

EOF;

    exit(1);

  }

}

$censored_words = array('cock', 'fuck', 'cuck', 'funt', 'cunt', 'bitch');

$_shutdown = false;

function eb_censor_words($text)

{

  // return $text;

  global $censored_words;

  foreach ( $censored_words as $word )

  {

    $replacement = substr($word, 0, 1) . preg_replace('/./', '*', substr($word, 1));

    while ( stristr($text, $word) )

    {

      $text = preg_replace("/$word/i", $replacement, $text);

    }

  }

  return $text;

}

require('libirc.php');

require('hooks.php');

require('config.php');

require('database.php');

require('permissions.php');

if ( !isset($permissions) )

{

  foreach ( $privileged_list as $user )

  {

    $permissions[$user] = array('admin');

  }

  if ( isset($alert_list) )

  {

    foreach ( $alert_list as $user )

    {

      $permissions[$user] = array('admin', 'alert');

    }

  }

}

$enanobot_version = '0.5-unstable';

@ini_set('display_errors', 'on');

error_reporting(E_ALL);

// load modules

foreach ( $modules as $module )

{

  $modulefile = "modules/$module.php";

  if ( file_exists($modulefile) )

  {

    require($modulefile);

  }

}

mysql_reconnect();

eval(eb_fetch_hook('startup_early'));

$libirc_channels = array();

$irc = new Request_IRC($server);

$irc->connect($nick, $user, $name, $pass);

$irc->set_privmsg_handler('enanobot_privmsg_event');

$irc->set_timeout_handlers(false, 'enanobot_timeout_event');

foreach ( $channels as $channel )

{

  $libirc_channels[$channel] = $irc->join($channel, 'enanobot_channel_event');

  $channel_clean = preg_replace('/^[#&]/', '', $channel);

  $libirc_channels[$channel_clean] =& $libirc_channels[$channel];

  $irc->privmsg('ChanServ', "OP $channel $nick");

}

$irc->event_loop();

$irc->close();

mysql_close($mysql_conn);

function enanobot_channel_event($sockdata, $chan)

{

  global $irc, $nick, $mysql_conn, $privileged_list;

  $sockdata = trim($sockdata);

  $message = Request_IRC::parse_message($sockdata);

  $channelname = $chan->get_channel_name();

  eval(eb_fetch_hook('event_raw_message'));

  switch ( $message['action'] )

  {

    case 'JOIN':

      eval(eb_fetch_hook('event_join'));

      break;

    case 'PART':

      eval(eb_fetch_hook('event_part'));

      break;

    case 'PRIVMSG':

      enanobot_process_channel_message($sockdata, $chan, $message);

      break;

  }

}

function enanobot_process_channel_message($sockdata, $chan, $message)

{

  global $irc, $nick, $mysql_conn, $privileged_list;

  if ( strpos($message['message'], $nick) && !check_permissions($message['nick'], array('context' => 'channel', 'channel' => $chan->get_channel_name())) && $message['nick'] != $nick )

  {

    $target_nick =& $message['nick'];

    // $chan->msg("{$target_nick}, I'm only a bot. :-) You should probably rely on the advice of humans if you need further assistance.", true);

  }

  else

  {

    eval(eb_fetch_hook('event_channel_msg'));

  }

}

function enanobot_privmsg_event($message)

{

  global $privileged_list, $irc, $nick;

  static $part_cache = array();

  if ( $message['message'] == 'Suspend' && $message['action'] == 'PRIVMSG' && check_permissions($message['nick'], array('context' => 'suspend'), false) )

  {

    foreach ( $irc->channels as $channel )

    {

      $part_cache[] = array($channel->get_channel_name(), $channel->get_handler());

      $channel->part("suspended by {$message['nick']}", true);

    }

  }

  else if ( $message['message'] == 'Resume' && $message['action'] == 'PRIVMSG' && check_permissions($message['nick'], array('context' => 'suspend'), false) )

  {

    global $nick;

    foreach ( $part_cache as $chan_data )

    {

      $chan_name = substr($chan_data[0], 1);

      $GLOBALS[$chan_name] = $irc->join($chan_data[0], $chan_data[1]);

      $GLOBALS[$chan_name]->msg("(resumed by {$message['nick']})", true);

      $irc->privmsg('ChanServ', "OP {$chan_data[0]} $nick");

    }

    $part_cache = array();

  }

  else if ( preg_match('/^Shutdown(?: (.+))?$/i', $message['message'], $match) && $message['action'] == 'PRIVMSG' && check_permissions($message['nick'], array('context' => 'shutdown'), false) )

  {

    $GLOBALS['_shutdown'] = true;

    $quitmessage = empty($match[1]) ? "Remote bot shutdown requested by {$message['nick']}" : $match[1];

    $irc->close($quitmessage, true);

    return 'BREAK';

  }

  else if ( preg_match('/^re(?:hash|load)?(?:config)?(?: |$)/', $message['message']) && check_permissions($message['nick'], array('context' => 'rehash'), false) )

  {

    $oldnick = $GLOBALS['nick'];

    require('config.php');

    $GLOBALS['privileged_list'] = $privileged_list;

    $GLOBALS['alert_list'] = $alert_list;

    $GLOBALS['channels'] = $channels;

    $GLOBALS['permissions'] = $permissions;

    if ( $nick != $oldnick )

    {

      $irc->change_nick($nick, $pass);

      $GLOBALS['nick'] = $nick;

      $GLOBALS['pass'] = $pass;

    }

    $in = array();

    foreach ( $irc->channels as $channel )

    {

      $channame = $channel->get_channel_name();

      if ( !in_array($channame, $channels) )

      {

        $channel->part("Leaving");

      }

      else

      {

        $in[] = $channame;

      }

    }

    unset($channel);

    foreach ( $channels as $channel )

    {

      if ( !in_array($channel, $in) )

      {

        $GLOBALS[ preg_replace('/^(#|&)/', '', $channel) ] = $irc->join($channel, 'enanobot_channel_event');

      }

    }

    $irc->privmsg($message['nick'], "Config has been reloaded.");

  }

  else if ( substr($message['message'], 0, 1) == "\x01" && substr($message['message'], -1) == "\x01" )

  {

    $msg = trim($message['message'], "\x01");

    list($ctcp) = explode(' ', $msg);

    $params = substr($msg, strlen($ctcp)+1);

    eval(eb_fetch_hook('event_ctcp'));

  }

  else if ( $message['action'] == 'PRIVMSG' )

  {

    eval(eb_fetch_hook('event_privmsg'));

  }

  else

  {

    eval(eb_fetch_hook('event_other'));

  }

}

function enanobot_timeout_event($irc)

{

  // uh-oh.

  $irc->close('client ping timeout (restarting connection)');

  if ( defined('LIBIRC_DEBUG') )

  {

    $now = date('r');

    echo "!!! [$now] Connection timed out; waiting 10 seconds and reconnecting\n";

  }

  // re-init

  global $server, $nick, $user, $name, $pass, $channels, $libirc_channels;

  // wait until we can get into the server

  while ( true )

  {

    sleep(10);

    if ( defined('LIBIRC_DEBUG') )

    {

      $now = date('r');

      echo "... [$now] Attempting reconnect\n";

    }

    $conn = @fsockopen($server, 6667, $errno, $errstr, 5);

    if ( $conn )

    {

      if ( defined('LIBIRC_DEBUG') )

      {

        $now = date('r');

        echo "!!! [$now] Reconnection successful, ghosting old login (waiting 5 seconds to avoid throttling)\n";

      }

      fputs($conn, "QUIT :This bot needs better exception handling. But until then I'm going to need to make repeated TCP connection attempts when my ISP craps out. Sorry :-/\r\n");

      fclose($conn);

      sleep(5);

      break;

    }

    else

    {

      if ( defined('LIBIRC_DEBUG') )

      {

        $now = date('r');

        echo "!!! [$now] Still waiting for connection to come back up\n";

      }

    }

  }

  $libirc_channels = array();

  // we were able to get back in; ask NickServ to GHOST the old nick

  $irc->connect($nick, $user, $name, false);

  foreach ( $channels as $channel )

  {

    $libirc_channels[$channel] = $irc->join($channel, 'enanobot_channel_event');

    $channel_clean = preg_replace('/^[#&]/', '', $channel);

    $libirc_channels[$channel_clean] =& $libirc_channels[$channel];

    $irc->privmsg('ChanServ', "OP $channel $nick");

  }

}

if ( $_shutdown )

{

  exit(2);

}