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<?php
/**
 * @file        pop3mail.php     Task to handle incoming emails through POP3
 *~TERABYTE_DOC_READY~
 * $Copyright: (c) 2001 - 2011 Invision Power Services, Inc.$
 * $License: http://www.invisionpower.com/company/standards.php#license$
 * $Author: mark $
 * @since        25th June 2010
 * $LastChangedDate: 2012-05-08 11:35:49 -0400 (Tue, 08 May 2012) $
 * @version        v3.3.3
 * $Revision: 10705 $
 */

if ( ! defined( 'IN_IPB' ) )
{
    print "<h1>Incorrect access</h1>You cannot access this file directly. If you have recently upgraded, make sure you upgraded all the relevant files.";
    exit();
}

/**
 *
 * @class        task_item
 * @brief        Task to handle incoming emails through POP3
 *
 */
class task_item
{
    /**
     * Object that stores the parent task manager class
     *
     * @var        $class
     */
    protected $class;
    
    /**
     * Array that stores the task data
     *
     * @var        $task
     */
    protected $task = array();
    
    /**
     * Registry Object Shortcuts
     *
     * @var        $registry
     * @var        $settings
     * @var        $lang
     */
    protected $registry;
    protected $settings;
    protected $lang;
    
    /**
     * Constructor
     *
     * @param    object        $registry        Registry object
     * @param    object        $class            Task manager class object
     * @param    array        $task            Array with the task data
     * @return    @e void
     */
    public function __construct( ipsRegistry $registry, $class, $task )
    {
        /* Make registry objects */
        $this->registry    = $registry;
        $this->settings    =& $this->registry->fetchSettings();
        $this->lang        = $this->registry->getClass('class_localization');
        
        $this->class    = $class;
        $this->task        = $task;
    }
    
    /**
     * Run this task
     *
     * @return    @e void
     */
    public function runTask()
    {
        //--------------------------------------
        // Init
        //--------------------------------------
        
        require_once( IPS_KERNEL_PATH . '/pop3class/pop3.php' );/*noLibHook*/
        $this->pop3 = new pop3_class;
        
        $this->pop3->hostname                            = $this->settings['pop3_server'];
        $this->pop3->port                                = $this->settings['pop3_port'];
        $this->pop3->tls                                = $this->settings['pop3_tls'];
        $this->pop3->realm                            = '';
        $this->pop3->workstation                        = '';
        $this->pop3->authentication_mechanism            = 'USER';
        $this->pop3->debug                            = FALSE;
        $this->pop3->html_debug                        = FALSE;
        $this->pop3->join_continuation_header_lines    = FALSE;
        
        $user                    = $this->settings['pop3_user'];
        $password                = $this->settings['pop3_password'];
        $apop                    = FALSE;
        
        //--------------------------------------
        // Connect and login
        //--------------------------------------
        
        $open = $this->pop3->Open();
        if ( $open != '' )
        {
            return;
        }
        
        $login = $this->pop3->Login( $user, $password, $apop );
        if ( $login != '' )
        {
            return;
        }
        
        //--------------------------------------
        // Any messages?
        //--------------------------------------
        
        $messages = NULL;
        $size = NULL;
        $this->pop3->Statistics( $messages, $size );
                
        if ( !$messages )
        {
            $this->pop3->Close();
            
            /* Log to log table - modify but dont delete */
            $this->class->appendTaskLog( $this->task, $this->lang->words['task_pop3email'] );
            
            /* Unlock Task: DO NOT MODIFY! */
            $this->class->unlockTask( $this->task );
            
            return;
        }
        
        //--------------------------------------
        // Well get them then!
        //--------------------------------------
        
        require_once ( IPS_ROOT_PATH . 'sources/classes/incomingEmail/incomingEmail.php' );
        
        $result = $this->pop3->ListMessages( '', TRUE );
                        
        if ( is_array( $result ) and !empty( $result ) )
        {
            foreach ( $result as $id => $messageID )
            {
                $headers = NULL;
                $body = NULL;
                $getMessage = $this->RetrieveMessage( $id );
                if ( $getMessage === NULL )
                {
                    continue;
                }
                
                incomingEmail::parse( $getMessage );
                
                // And delete
                $this->pop3->DeleteMessage( $id );
            }
        }
        
        //--------------------------------------
        // Log off
        //--------------------------------------
        
        $this->pop3->Close();
        
        /* Log to log table - modify but dont delete */
        $this->class->appendTaskLog( $this->task, $this->lang->words['task_pop3email'] );
        
        /* Unlock Task: DO NOT MODIFY! */
        $this->class->unlockTask( $this->task );
    }
    
    protected function RetrieveMessage( $id )
    {
        if( $this->pop3->PutLine( "RETR {$id}" ) == 0 )
        {
            return NULL;
        }
        
        $response = $this->pop3->GetLine();
        if ( substr( $response, 0, 3 ) != '+OK' )
        {
            return NULL;
        }
        
        $message = '';
        while ( TRUE == TRUE )
        {
            $line = $this->pop3->GetLine();
            if ( $line == '.' )
            {
                break;
            }
            $message .= $line . "n";
        }
        
        return $message;
    }
}