<?php
defined('FULL_PATH') or die('restricted access!');

/**
 * Widgets Event Handler (sample)
 *
 */
class WidgetEventHandler extends kDBEventHandler {

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

		$permissions = array(
			'OnItemBuild' => array('self' => true),
			'OnRecalculatePriorities' => array('self' => 'add|edit'),
			'OnCustomEvent' => array('self' => true),
		);

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

	/**
	 * Checks user permission to execute given $event
	 *
	 * @param kEvent $event
	 * @return bool
	 * @access public
	 */
	public function CheckPermission(kEvent $event)
	{
		$skip_permissions_check_events = Array (
			'OnAnotherCustomEvent',
		);

		if ( in_array($event->Name, $skip_permissions_check_events) ) {
			return true;
		}

		return parent::CheckPermission($event);
	}

	/**
	 * Define alternative event processing method names
	 *
	 * @return void
	 */
	protected function mapEvents()
	{
		parent::mapEvents();

		$events_map = array(
			'OnMassMoveUp' => 'OnChangePriority',
			'OnMassMoveDown' => 'OnChangePriority',
		);

		$this->eventMethods = array_merge($this->eventMethods, $events_map);
	}

	/**
	 * Processes OnMassMoveUp, OnMassMoveDown events
	 *
	 * @param kEvent $event Event.
	 *
	 * @return void
	 */
	protected function OnChangePriority(kEvent $event)
	{
		$this->Application->SetVar('priority_prefix', $event->getPrefixSpecial());
		$event->CallSubEvent('priority:' . $event->Name);
	}

	/**
	 * Completely recalculates priorities in current category
	 *
	 * @param kEvent $event Event.
	 *
	 * @return void
	 */
	protected function OnRecalculatePriorities(kEvent $event)
	{
		$this->Application->SetVar('priority_prefix', $event->getPrefixSpecial());
		$event->CallSubEvent('priority:' . $event->Name);
	}

	/**
	 * [HOOK] Connects to priority unit.
	 *
	 * @param kEvent $event Event.
	 *
	 * @return void
	 */
	protected function OnModifyPrioritiesConfig(kEvent $event)
	{
		$config = $event->MasterEvent->getUnitConfig();

		$prefixes = $config->getProcessPrefixes();
		$prefixes[] = $event->Prefix;
		$config->setProcessPrefixes($prefixes);
	}

	/**
	 * Set custom query for the list
	 *
	 * @param kEvent $event
	 */
	function OnCustomEvent($event)
	{
		$object = $event->getObject();
		/* @var $object kDBList */

	}

	/**
	 * Apply any custom changes to list's sql query
	 *
	 * @param kEvent $event
	 * @return void
	 * @access protected
	 * @see kDBEventHandler::OnListBuild()
	 */
	protected function SetCustomQuery(kEvent $event)
	{
		parent::SetCustomQuery($event);

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

		# identifying event based on special and setting filter
		if ( $event->Special == 'custom-special' ) {
//				$object->addFilter('primary_filter', '%1$s.Status = ' . STATUS_DISABLED);
		}
	}

	/**
	 * Occurs before creating item
	 *
	 * @param kEvent $event
	 * @return void
	 * @access protected
	 */
	protected function OnBeforeItemCreate(kEvent $event)
	{
		parent::OnBeforeItemCreate($event);

	}

	/**
	 * Occurs before updating item
	 *
	 * @param kEvent $event
	 * @return void
	 * @access protected
	 */
	protected function OnBeforeItemUpdate(kEvent $event)
	{
		parent::OnBeforeItemUpdate($event);

	}

	/**
	 * Occurs before deleting item, id of item being
	 * deleted is stored as 'id' event param
	 *
	 * @param kEvent $event
	 * @return void
	 * @access protected
	 */
	protected function OnBeforeItemDelete(kEvent $event)
	{
		parent::OnBeforeItemDelete($event);


	}

	/**
	 * Occurs before loading item, 'id' parameter
	 * allows to get id of item being loaded
	 *
	 * @param kEvent $event
	 * @return void
	 * @access protected
	 */
	protected function OnBeforeItemLoad(kEvent $event)
	{
		parent::OnBeforeItemLoad($event);


	}


	/**
	 * Occurs after creating item
	 *
	 * @param kEvent $event
	 * @return void
	 * @access protected
	 */
	protected function OnAfterItemCreate(kEvent $event)
	{
		parent::OnAfterItemCreate($event);


	}

	/**
	 * Occurs after updating item
	 *
	 * @param kEvent $event
	 * @return void
	 * @access protected
	 */
	protected function OnAfterItemUpdate(kEvent $event)
	{
		parent::OnAfterItemUpdate($event);


	}

	/**
	 * Occurs after deleting item, id of deleted item
	 * is stored as 'id' param of event
	 *
	 * @param kEvent $event
	 * @return void
	 * @access protected
	 */
	protected function OnAfterItemDelete(kEvent $event)
	{
		parent::OnAfterItemDelete($event);


	}

	/**
	 * Loads user images
	 *
	 * @param kEvent $event
	 * @return void
	 * @access protected
	 */
	protected function OnAfterItemLoad(kEvent $event)
	{
		parent::OnAfterItemLoad($event);


	}

}