View file PF.Base/module/forum/include/service/subscribe/process.class.php

<?php
defined('PHPFOX') or exit('NO DICE!');

/**
 * @copyright		[PHPFOX_COPYRIGHT]
 * @author  		Raymond Benc
 * @package 		Phpfox_Service
 */
class Forum_Service_Subscribe_Process extends Phpfox_Service 
{
	/**
	 * Class constructor
	 */	
	public function __construct()
	{	
		$this->_sTable = Phpfox::getT('forum_subscribe');
	}
    
    /**
     * @param int $iThreadId
     * @param int $iUserId
     *
     * @return bool
     */
	public function add($iThreadId, $iUserId)
	{
		Phpfox::isUser(true);
		
		$iCnt = $this->database()->select('COUNT(*)')
			->from($this->_sTable)
			->where('thread_id = ' . (int) $iThreadId . ' AND user_id = ' . (int) $iUserId)
			->execute('getSlaveField');
        
        if ($iCnt) {
            return false;
        }
        
        $this->database()->insert($this->_sTable, [
                'thread_id' => (int)$iThreadId,
                'user_id'   => (int)$iUserId
            ]);
        return true;
	}
    
    /**
     * @param int $iThreadId
     * @param int $iUserId
     *
     * @return void
     */
	public function delete($iThreadId, $iUserId)
	{
		$this->database()->delete($this->_sTable, 'thread_id = ' . (int) $iThreadId . ' AND user_id = ' . (int) $iUserId);
	}
	
	/**
	 * If a call is made to an unknown method attempt to connect
	 * it to a specific plug-in with the same name thus allowing 
	 * plug-in developers the ability to extend classes.
	 *
	 * @param string $sMethod is the name of the method
	 * @param array $aArguments is the array of arguments of being passed
     *
     * @return null
	 */
	public function __call($sMethod, $aArguments)
	{
		/**
		 * Check if such a plug-in exists and if it does call it.
		 */
        if ($sPlugin = Phpfox_Plugin::get('forum.service_subscribe_process__call')) {
            eval($sPlugin);
            return null;
        }
			
		/**
		 * No method or plug-in found we must throw a error.
		 */
		Phpfox_Error::trigger('Call to undefined method ' . __CLASS__ . '::' . $sMethod . '()', E_USER_ERROR);
	}	
}