<?php

	class ReviewsEventHandler extends kDBEventHandler
	{
		/**
		 * Get's special of main item for linking with subitem
		 *
		 * @param kEvent $event
		 * @return string
		 */
		function getMainSpecial(&$event)
		{
			if ($event->Special == 'product' && !$this->Application->IsAdmin()) {
				// rev.product should auto-link
				return '';
			}

			return parent::getMainSpecial($event);
		}

		/**
		 * Checks REVIEW/REVIEW.PENDING permission by main object primary category (not current category)
		 *
		 * @param kEvent $event
		 */
		function CheckPermission(&$event)
		{
			if ($event->Name == 'OnAddReview' || $event->Name == 'OnCreate') {
				$perm_helper =& $this->Application->recallObject('PermissionsHelper');
				/* @var $perm_helper kPermissionsHelper */

				$parent_prefix = $this->Application->getUnitOption($event->Prefix, 'ParentPrefix');
				$main_object =& $this->Application->recallObject($parent_prefix);
				/* @var $main_object kCatDBItem */

				$perm_name = $this->getPermPrefix($event).'.REVIEW';
				$res = 	$this->Application->CheckPermission($perm_name, 0, $main_object->GetDBField('CategoryId')) ||
						$this->Application->CheckPermission($perm_name.'.PENDING', 0, $main_object->GetDBField('CategoryId'));

				if (!$res) {
					$event->status = erPERM_FAIL;
				}
				return $res;
			}

			return parent::CheckPermission($event);
		}

		/**
		 * Returns prefix for permissions
		 *
		 * @param kEvent $event
		 */
		function getPermPrefix(&$event)
		{
			$main_prefix = $this->Application->GetTopmostPrefix($event->Prefix);
			// this will return LINK for l, ARTICLE for n, TOPIC for bb, PRODUCT for p
			$item_prefix = $this->Application->getUnitOption($main_prefix, 'PermItemPrefix');

			return $item_prefix;
		}

		/**
		 * Apply any custom changes to list's sql query
		 *
		 * @param kEvent $event
		 * @access protected
		 * @see OnListBuild
		 */
		function SetCustomQuery(&$event)
		{
			$object =& $event->getObject();
			/* @var $object kDBList */

			if (!$this->Application->IsAdmin()) {
				$object->addFilter('active', '%1$s.Status = '.STATUS_ACTIVE);
			}

			switch ($event->Special)
			{
				case 'showall':
					$object->clearFilters();
					break;

				case 'item': // used ?
					$object->clearFilters();
					$info = $object->getLinkedInfo();
					$this->Application->setUnitOption($info['ParentPrefix'], 'AutoLoad', true);
					$parent =& $this->Application->recallObject($info['ParentPrefix']);
					$object->addFilter('item_reviews', '%1$s.ItemId = '.$parent->GetDBField('ResourceId'));
					break;

				case 'products': // used ?
					$object->removeFilter('parent_filter');	// this is important
					$object->addFilter('product_reviews', '%1$s.ItemId = pr.ResourceId');
					break;

				case 'product':
					$object->addFilter('product_reviews', '%1$s.ItemId = pr.ResourceId'); // for LEFT JOIN
					break;
			}

			if ($event->getEventParam('type') == 'current_user') {
				$object->removeFilter('active');
				$object->addFilter('current_user', '%1$s.CreatedById = '.$this->Application->RecallVar('user_id'));
				$object->addFilter('current_ip', '%1$s.IPAddress = "'.$_SERVER['REMOTE_ADDR'].'"');
			}
		}

		/**
		 * Adds review from front in case if user is logged in
		 *
		 * @param kEvent $event
		 */
		function OnAddReview(&$event)
		{
			$event->CallSubEvent('OnCreate');
		}

		/**
		 * Get new review status on user review permission
		 *
		 * @param kEvent $event
		 * @return int
		 */
		function getReviewStatus(&$event)
		{
			$parent_prefix = $this->Application->getUnitOption($event->Prefix, 'ParentPrefix');
			$main_object =& $this->Application->recallObject($parent_prefix);
			/* @var $main_object kCatDBItem */

			$ret = STATUS_DISABLED;
			$perm_name = $this->getPermPrefix($event).'.REVIEW';
			if ($this->Application->CheckPermission($perm_name, 0, $main_object->GetDBField('CategoryId'))) {
				$ret = STATUS_ACTIVE;
			}
			else if ($this->Application->CheckPermission($perm_name.'.PENDING', 0, $main_object->GetDBField('CategoryId'))) {
				$ret = STATUS_PENDING;
			}

			return $ret;
		}

		/**
		 * Prefills all fields on front-end
		 *
		 * @param kEvent $event
		 */
		function OnBeforeItemCreate(&$event)
		{
			if ($this->Application->IsAdmin()) {
				return ;
			}

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

			$parent_info = $object->getLinkedInfo();

			$spam_helper =& $this->Application->recallObject('SpamHelper');
			/* @var $spam_helper SpamHelper */

			$spam_helper->InitHelper($parent_info['ParentId'], 'Review', 0);

			if ($spam_helper->InSpamControl()) {
				$event->status = erFAIL;
				$object->SetError('ReviewText', 'too_frequent', 'lu_ferror_review_duplicate');
				return ;
			}

			$item_type = $this->Application->getUnitOption($parent_info['ParentPrefix'], 'ItemType');

			$object->SetDBField('IPAddress', $_SERVER['REMOTE_ADDR']);
			$object->SetDBField('ItemId', $parent_info['ParentId']); // ResourceId
			$object->SetDBField('CreatedById', $this->Application->RecallVar('user_id'));
			$object->SetDBField('ItemType', $item_type);
			$object->SetDBField('Status', $this->getReviewStatus($event));
			$object->SetDBField('TextFormat', 0); // set plain text format directly
			$object->SetDBField('Module', $this->Application->findModule('Var', $parent_info['ParentPrefix'], 'Name'));
		}

		/**
		 * Updates item review counter
		 *
		 * @param kEvent $event
		 */
		function OnAfterItemCreate(&$event)
		{
			$this->updateReviewsCounter($event);

			if (!$this->Application->IsAdmin()) {
				$spam_helper =& $this->Application->recallObject('SpamHelper');
				/* @var $spam_helper SpamHelper */

				$object =& $event->getObject();
				$parent_info = $object->getLinkedInfo();

				$config_mapping = $this->Application->getUnitOption($event->Prefix, 'ConfigMapping');
				$review_settings = $config_mapping['ReviewDelayValue'].':'.$config_mapping['ReviewDelayInterval'];
				$spam_helper->InitHelper($parent_info['ParentId'], 'Review', $review_settings);

				$spam_helper->AddToSpamControl();
			}
		}

		/**
		 * Updates total review counter
		 *
		 * @param kEvent $event
		 */
		function updateReviewsCounter(&$event)
		{
			$parent_prefix = $this->Application->getUnitOption($event->Prefix, 'ParentPrefix');
			$main_object =& $this->Application->recallObject($parent_prefix, null, Array ('raise_warnings' => 0));
			/* @var $main_object kCatDBItem */

			if (!$main_object->isLoaded()) {
				// deleting main item / cloning main item
				return ;
			}

			$object =& $event->getObject(); // for temp tables

			$sql = 'SELECT COUNT(ReviewId)
					FROM '.$object->TableName.'
					WHERE ItemId = '.$main_object->GetDBField('ResourceId');
			$review_count = $this->Conn->GetOne($sql);
			$main_object->SetDBField('CachedReviewsQty', $review_count);
			$main_object->Update();
		}


		/**
		 * Updates main item cached review counter
		 *
		 * @param kEvent $event
		 */
		function OnAfterItemDelete(&$event)
		{
			$this->updateReviewsCounter($event);
		}

		/**
		 * Creates review & redirect to confirmation template
		 *
		 * @param kEvent $event
		 */
		function OnCreate(&$event)
		{
			parent::OnCreate($event);

			if ($event->status != erSUCCESS || $this->Application->IsAdmin()) {
				return ;
			}

			$object =& $event->getObject();
			$next_template = $object->GetDBField('Status') == STATUS_ACTIVE ? 'success_template' : 'success_pending_template';
			$event->redirect = $this->Application->GetVar($next_template);
			$event->SetRedirectParam('opener', 's');

			$parent_prefix = $this->Application->getUnitOption($event->Prefix, 'ParentPrefix');
			$event->SetRedirectParam('pass', 'm,'.$parent_prefix);
		}
	}

?>