gnu-social/extlib/XMPPHP/XMPP.php

<?php
/**
 * XMPPHP: The PHP XMPP Library
 * Copyright (C) 2008  Nathanael C. Fritz
 * This file is part of SleekXMPP.
 * 
 * XMPPHP is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 * 
 * XMPPHP is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with XMPPHP; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 *
 * @category   xmpphp 
 * @package	XMPPHP
 * @author	 Nathanael C. Fritz <JID: fritzy@netflint.net>
 * @author	 Stephan Wentz <JID: stephan@jabber.wentz.it>
 * @copyright  2008 Nathanael C. Fritz
 */

/** XMPPHP_XMLStream */
require_once "XMLStream.php";

/**
 * XMPPHP Main Class
 * 
 * @category   xmpphp 
 * @package	XMPPHP
 * @author	 Nathanael C. Fritz <JID: fritzy@netflint.net>
 * @author	 Stephan Wentz <JID: stephan@jabber.wentz.it>
 * @copyright  2008 Nathanael C. Fritz
 * @version	$Id$
 */
class XMPPHP_XMPP extends XMPPHP_XMLStream {
	/**
	 * @var string
	 */
	protected $server;

	/**
	 * @var string
	 */
	protected $user;
	
	/**
	 * @var string
	 */
	protected $password;
	
	/**
	 * @var string
	 */
	protected $resource;
	
	/**
	 * @var string
	 */
	protected $fulljid;
	
	/**
	 * @var string
	 */
	protected $basejid;
	
	/**
	 * @var boolean
	 */
	protected $authed = false;
	
	/**
	 * @var boolean
	 */
	protected $auto_subscribe = false;
	
	/**
	 * @var boolean
	 */
	protected $use_encryption = true;
	
	/**
	 * Constructor
	 *
	 * @param string  $host
	 * @param integer $port
	 * @param string  $user
	 * @param string  $password
	 * @param string  $resource
	 * @param string  $server
	 * @param boolean $printlog
	 * @param string  $loglevel
	 */
	public function __construct($host, $port, $user, $password, $resource, $server = null, $printlog = false, $loglevel = null) {
		parent::__construct($host, $port, $printlog, $loglevel);
		
		$this->user	 = $user;
		$this->password = $password;
		$this->resource = $resource;
		if(!$server) $server = $host;
		$this->basejid = $this->user . '@' . $this->host;

		$this->stream_start = '<stream:stream to="' . $server . '" xmlns:stream="http://etherx.jabber.org/streams" xmlns="jabber:client" version="1.0">';
		$this->stream_end   = '</stream:stream>';
		$this->default_ns   = 'jabber:client';
		
		$this->addHandler('features', 'http://etherx.jabber.org/streams', 'features_handler');
		$this->addHandler('success', 'urn:ietf:params:xml:ns:xmpp-sasl', 'sasl_success_handler');
		$this->addHandler('failure', 'urn:ietf:params:xml:ns:xmpp-sasl', 'sasl_failure_handler');
		$this->addHandler('proceed', 'urn:ietf:params:xml:ns:xmpp-tls', 'tls_proceed_handler');
		$this->addHandler('message', 'jabber:client', 'message_handler');
		$this->addHandler('presence', 'jabber:client', 'presence_handler');
	}

	/**
	 * Turn encryption on/ff
	 *
	 * @param boolean $useEncryption
	 */
	public function useEncryption($useEncryption = true) {
		$this->use_encryption = $useEncryption;
	}
	
	/**
	 * Turn on auto-authorization of subscription requests.
	 *
	 * @param boolean $autoSubscribe
	 */
	public function autoSubscribe($autoSubscribe = true) {
		$this->auto_subscribe = $autoSubscribe;
	}

	/**
	 * Send XMPP Message
	 *
	 * @param string $to
	 * @param string $body
	 * @param string $type
	 * @param string $subject
	 */
	public function message($to, $body, $type = 'chat', $subject = null, $payload = null) {

		if(is_null($type))
		{
			$type = 'chat';
		}
		
		$to	  = htmlspecialchars($to);
		$body	= htmlspecialchars($body);
		$subject = htmlspecialchars($subject);
		
		$out = "<message from='{$this->fulljid}' to='$to' type='$type'>";
		if($subject) $out .= "<subject>$subject</subject>";
		$out .= "<body>$body</body>";
		if($payload) $out .= $payload;
		$out .= "</message>";
		
		return $this->send($out);
	}

	/**
	 * Set Presence
	 *
	 * @param string $status
	 * @param string $show
	 * @param string $to
	 */
	public function presence($status = null, $show = 'available', $to = null, $type='available', $priority=NULL) {
		if($type == 'available') $type = '';
		$to	 = htmlspecialchars($to);
		$status = htmlspecialchars($status);
		if($show == 'unavailable') $type = 'unavailable';
		
		$out = "<presence";
		if($to) $out .= " to='$to'";
		if($type) $out .= " type='$type'";
		if($show == 'available' and !$status and is_null($priority)) {
			$out .= "/>";
		} else {
			$out .= ">";
			if($show != 'available') $out .= "<show>$show</show>";
			if($status) $out .= "<status>$status</status>";
			if(!is_null($priority)) $out .= "<priority>$priority</priority>";
			$out .= "</presence>";
		}
		
		return $this->send($out);
	}

	/**
	 * Message handler
	 *
	 * @param string $xml
	 */
	public function message_handler($xml) {
		if(isset($xml->attrs['type'])) {
			$payload['type'] = $xml->attrs['type'];
		} else {
			$payload['type'] = 'chat';
		}
		$payload['from'] = $xml->attrs['from'];
		$payload['body'] = $xml->sub('body')->data;
		$payload['raw'] = $xml;
		$this->log->log("Message: {$xml->sub('body')->data}", XMPPHP_Log::LEVEL_DEBUG);
		$this->event('message', $payload);
	}

	/**
	 * Presence handler
	 *
	 * @param string $xml
	 */
	public function presence_handler($xml) {
		$payload['type'] = (isset($xml->attrs['type'])) ? $xml->attrs['type'] : 'available';
		$payload['show'] = (isset($xml->sub('show')->data)) ? $xml->sub('show')->data : $payload['type'];
		$payload['from'] = $xml->attrs['from'];
		$payload['status'] = (isset($xml->sub('status')->data)) ? $xml->sub('status')->data : '';
		$payload['raw'] = $xml;		
		$this->log->log("Presence: {$payload['from']} [{$payload['show']}] {$payload['status']}",  XMPPHP_Log::LEVEL_DEBUG);
		if(array_key_exists('type', $xml->attrs) and $xml->attrs['type'] == 'subscribe') {
			if($this->auto_subscribe) $this->send("<presence type='subscribed' to='{$xml->attrs['from']}' from='{$this->fulljid}' /><presence type='subscribe' to='{$xml->attrs['from']}' from='{$this->fulljid}' />");
			$this->event('subscription_requested', $payload);
		} elseif(array_key_exists('type', $xml->attrs) and $xml->attrs['type'] == 'subscribed') {
			$this->event('subscription_accepted', $payload);
		} else {
			$this->event('presence', $payload);
		}
	}

	/**
	 * Features handler
	 *
	 * @param string $xml
	 */
	protected function features_handler($xml) {
		if($xml->hasSub('starttls') and $this->use_encryption) {
			$this->send("<starttls xmlns='urn:ietf:params:xml:ns:xmpp-tls'><required /></starttls>");
		} elseif($xml->hasSub('bind')) {
			$id = $this->getId();
			$this->addIdHandler($id, 'resource_bind_handler');
			$this->send("<iq xmlns=\"jabber:client\" type=\"set\" id=\"$id\"><bind xmlns=\"urn:ietf:params:xml:ns:xmpp-bind\"><resource>{$this->resource}</resource></bind></iq>");
		} else {
			$this->log->log("Attempting Auth...");
			$this->send("<auth xmlns='urn:ietf:params:xml:ns:xmpp-sasl' mechanism='PLAIN'>" . base64_encode("\x00" . $this->user . "\x00" . $this->password) . "</auth>");
		}
	}

	/**
	 * SASL success handler
	 *
	 * @param string $xml
	 */
	protected function sasl_success_handler($xml) {
		$this->log->log("Auth success!");
		$this->authed = true;
		$this->reset();
	}
	
	/**
	 * SASL feature handler
	 *
	 * @param string $xml
	 */
	protected function sasl_failure_handler($xml) {
		$this->log->log("Auth failed!",  XMPPHP_Log::LEVEL_ERROR);
		$this->disconnect();
		
		throw new XMPPHP_Exception('Auth failed!');
	}

	/**
	 * Resource bind handler
	 *
	 * @param string $xml
	 */
	protected function resource_bind_handler($xml) {
		if($xml->attrs['type'] == 'result') {
			$this->log->log("Bound to " . $xml->sub('bind')->sub('jid')->data);
			$this->fulljid = $xml->sub('bind')->sub('jid')->data;
		}
		$id = $this->getId();
		$this->addIdHandler($id, 'session_start_handler');
		$this->send("<iq xmlns='jabber:client' type='set' id='$id'><session xmlns='urn:ietf:params:xml:ns:xmpp-session' /></iq>");
	}

	/**
	* Retrieves the roster
	*
	*/
	public function getRoster() {
		$id = $this->getID();
		$this->addIdHandler($id, 'roster_get_handler');
		$this->send("<iq xmlns='jabber:client' type='get' id='$id'><query xmlns='jabber:iq:roster' /></iq>");
	}

	/**
	* Roster retrieval handler
	*
	* @param string $xml
	*/
	protected function roster_get_handler($xml) {
		// TODO: make this work
	}

	/**
	 * Session start handler
	 *
	 * @param string $xml
	 */
	protected function session_start_handler($xml) {
		$this->log->log("Session started");
		$this->event('session_start');
	}

	/**
	 * TLS proceed handler
	 *
	 * @param string $xml
	 */
	protected function tls_proceed_handler($xml) {
		$this->log->log("Starting TLS encryption");
		stream_socket_enable_crypto($this->socket, true, STREAM_CRYPTO_METHOD_SSLv23_CLIENT);
		$this->reset();
	}
}