<?php
/**
* @version	$Id: category_items_event_handler.php 15137 2012-03-04 08:06:21Z 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 CategoryItemsEventHander extends kDBEventHandler
	{
		/**
		 * Setting language dependant navigation bar as calculated field
		 *
		 * @param kEvent $event
		 * @return void
		 * @access protected
		 * @see kDBEventHandler::OnListBuild()
		 */
		protected function SetCustomQuery(kEvent $event)
		{
			parent::SetCustomQuery($event);

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

			$ml_formatter = $this->Application->recallObject('kMultiLanguage');
			/* @var $ml_formatter kMultiLanguage */

			$object->addCalculatedField('CategoryName', 'c.' . $ml_formatter->LangFieldName('CachedNavbar'));
		}

		/**
		 * Set's new category as primary for product
		 *
		 * @param kEvent $event
		 */
		function OnSetPrimary($event)
		{
			$object =& $event->getObject(Array ('skip_autoload' => true));
			/* @var $object kDBItem */

			$ids = $this->StoreSelectedIDs($event);

			if ( $ids ) {
				$id = array_shift($ids);
				$table_info = $object->getLinkedInfo();

				$this->Conn->Query('UPDATE ' . $object->TableName . ' SET PrimaryCat = 0 WHERE ' . $table_info['ForeignKey'] . ' = ' . $table_info['ParentId']);
				$this->Conn->Query('UPDATE ' . $object->TableName . ' SET PrimaryCat = 1 WHERE (' . $table_info['ForeignKey'] . ' = ' . $table_info['ParentId'] . ') AND (CategoryId = ' . $id . ')');
			}

			$event->SetRedirectParam('opener', 's');
		}

		/**
		 * Apply custom processing to item
		 *
		 * @param kEvent $event
		 * @param string $type
		 * @return void
		 * @access protected
		 */
		protected function customProcessing(kEvent $event, $type)
		{
			if ( $event->Name == 'OnMassDelete' ) {
				$object =& $event->getObject();
				$table_info = $object->getLinkedInfo();

				switch ($type) {
					case 'before':
						$ids = $event->getEventParam('ids');

						if ( $ids ) {
							$sql = 'SELECT CategoryId
									FROM ' . $object->TableName . '
									WHERE (PrimaryCat = 0) AND (' . $table_info['ForeignKey'] . '=' . $table_info['ParentId'] . ') AND CategoryId IN (' . implode(',', $ids) . ')';
							$event->setEventParam('ids', $this->Conn->GetCol($sql));
						}
						break;

					// not needed because 'before' does not allow to delete primary cat!
					/*case 'after':
						// set 1st not deleted category as primary
						$sql = 'SELECT COUNT(*)
								FROM ' . $object->TableName . '
								WHERE (PrimaryCat = 1) AND (' . $table_info['ForeignKey'] . ' = ' . $table_info['ParentId'] . ')';
						$has_primary = $this->Conn->GetOne($sql);

						if ( !$has_primary ) {
							$sql = 'SELECT CategoryId
									FROM ' . $object->TableName . '
									WHERE ' . $table_info['ForeignKey'] . ' = ' . $table_info['ParentId'];
							$cat_id = $this->Conn->GetOne($sql);

							$sql = 'UPDATE ' . $object->TableName . '
									SET PrimaryCat = 1
									WHERE (' . $table_info['ForeignKey'] . ' = ' . $table_info['ParentId'] . ') AND (CategoryId = ' . $cat_id . ')';
							$this->Conn->Query($sql);
						}
						break;*/
				}
			}
		}

		/**
		 * Removes primary mark from cloned category items record
		 *
		 * @param kEvent $event
		 * @return void
		 * @access protected
		 */
		protected function OnAfterClone(kEvent $event)
		{
			parent::OnAfterClone($event);

			$id = $event->getEventParam('id');
			$table = $this->Application->getUnitOption($event->Prefix, 'TableName');
			$id_field = $this->Application->getUnitOption($event->Prefix, 'IDField');

			$sql = 'UPDATE %s
					SET PrimaryCat = 0
					WHERE %s = %s';
			$this->Conn->Query(sprintf($sql, $table, $id_field, $id));
		}

		/**
		 * Deletes items of requested type from requested categories.
		 * In case if item is deleted from it's last category, then delete item too.
		 *
		 * @param kEvent $event
		 * @return void
		 * @access protected
		 */
		protected function OnDeleteFromCategory($event)
		{
			$category_ids = $event->getEventParam('category_ids');

			if ( !$category_ids ) {
				return ;
			}

			$item_prefix = $event->getEventParam('item_prefix');
			$item = $this->Application->recallObject($item_prefix . '.-item', null, Array ('skip_autoload' => true));
			/* @var $item kCatDBItem */

			$ci_table = $this->Application->getUnitOption($event->Prefix, 'TableName');
			$item_table = $this->Application->getUnitOption($item_prefix, 'TableName');

			$sql = 'SELECT ItemResourceId, CategoryId
					FROM %1$s
					INNER JOIN %2$s ON (%1$s.ResourceId = %2$s.ItemResourceId)
					WHERE CategoryId IN (%3$s)';
			$category_items = $this->Conn->Query( sprintf($sql, $item_table, $ci_table, implode(',', $category_ids)) );

			$item_hash = Array ();
			foreach ($category_items as $ci_row) {
				$item_hash[ $ci_row['ItemResourceId'] ][] = $ci_row['CategoryId'];
			}

			foreach ($item_hash as $item_resource_id => $delete_category_ids) {
				$item->Load($item_resource_id, 'ResourceId');
				$item->DeleteFromCategories($delete_category_ids);
			}
		}

	}