<?php
/**
* @version	$Id: favorites_eh.php 16513 2017-01-20 14:10:53Z alex $
* @package	In-Portal
* @copyright	Copyright (C) 1997 - 2009 Intechnic. All rights reserved.
* @license      GNU/GPL
* In-Portal is Open Source software.
* This means that this software may have been modified pursuant
* the GNU General Public License, and as distributed it includes
* or is derivative of works licensed under the GNU General Public License
* or other free or open source software licenses.
* See http://www.in-portal.org/license for copyright notices and details.
*/

defined('FULL_PATH') or die('restricted access!');

class FavoritesEventHandler extends kDBEventHandler {

	/**
	 * Allows to override standard permission mapping
	 *
	 * @return void
	 * @access protected
	 * @see kEventHandler::$permMapping
	 */
	protected function mapPermissions()
	{
		parent::mapPermissions();

		$permissions = Array (
			'OnFavoriteToggle' => Array ('subitem' => true),
		);

		$this->permMapping = array_merge($this->permMapping, $permissions);
	}

	/**
	 * Adds/removes item from favorites
	 *
	 * @param kEvent $event
	 */
	function OnFavoriteToggle($event)
	{
		$parent_prefix = $this->Application->getUnitOption($event->Prefix, 'ParentPrefix');

		/** @var kDBItem $parent_object */
		$parent_object = $this->Application->recallObject($parent_prefix);

		if (!$parent_object->isLoaded() || !$this->Application->CheckPermission('FAVORITES', 0, $parent_object->GetDBField('ParentPath'))) {
			$event->status = kEvent::erPERM_FAIL;
			return ;
		}

		$user_id = $this->Application->RecallVar('user_id');
		$sql = 'SELECT FavoriteId
				FROM '.$this->Application->getUnitOption($event->Prefix, 'TableName').'
				WHERE (PortalUserId = '.$user_id.') AND (ResourceId = '.$parent_object->GetDBField('ResourceId').')';
		$favorite_id = $this->Conn->GetOne($sql);

		/** @var kDBItem $object */
		$object = $event->getObject(Array('skip_autoload' => true));

		if ($favorite_id) {
			$object->Delete($favorite_id);
		}
		else {
			$object->Create();
		}

		$event->SetRedirectParam('pass', 'm,'.$parent_prefix);
	}

	/**
	 * Prepares Favorite record fields
	 *
	 * @param kEvent $event
	 * @return void
	 * @access protected
	 */
	protected function OnBeforeItemCreate(kEvent $event)
	{
		parent::OnBeforeItemCreate($event);

		/** @var kDBItem $object */
		$object = $event->getObject();

		$user_id = $this->Application->RecallVar('user_id');
		$object->SetDBField('PortalUserId', $user_id);

		$parent_prefix = $this->Application->getUnitOption($event->Prefix, 'ParentPrefix');

		/** @var kDBItem $parent_object */
		$parent_object = $this->Application->recallObject($parent_prefix);

		$object->SetDBField('ResourceId', $parent_object->GetDBField('ResourceId'));
		$object->SetDBField('ItemTypeId', $this->Application->getUnitOption($parent_prefix, 'ItemType'));
	}

	/**
	 * [HOOK] Deletes favorite record to item, that is beeing deleted
	 *
	 * @param kEvent $event
	 */
	function OnDeleteFavoriteItem($event)
	{
		$main_object = $event->MasterEvent->getObject();

		$sql = 'DELETE FROM '.$this->Application->getUnitOption($event->Prefix, 'TableName').'
				WHERE ResourceId = '.$main_object->GetDBField('ResourceId');
		$this->Conn->Query($sql);
	}

}