xmpphp/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) {
        $to      = htmlspecialchars($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></message>";
        
        $this->send($out);
    }

    /**
     * Set Presence
     *
     * @param string $status
     * @param string $show
     * @param string $to
     */
    public function presence($status = null, $show = 'available', $to = null) {
        $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) {
            $out .= "/>";
        } else {
            $out .= ">";
            if($show != 'available') $out .= "<show>$show</show>";
            if($status) $out .= "<status>$status</status>";
            $out .= "</presence>";
        }
        
        $this->send($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;
        $this->log->log("Message: {$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 : '';
        $this->log->log("Presence: {$payload['from']} [{$payload['show']}] {$payload['status']}",  XMPPHP_Log::LEVEL_DEBUG);
        if($xml->attrs['type'] == 'subscribe') {
            if($this->auto_subscribe) $this->send("<presence type='subscribed' to='{$xml->attrs['from']}' from='{$this->basejid}' /><presence type='subscribe' to='{$xml->attrs['from']}' from='{$this->basejid}' />");
            $this->event('subscription_requested', $payload);
        } elseif($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>");
    }

    /**
     * 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();
    }
}