<?php
/**
 * @brief		iCalendar active record
 * @subpackage	Calendar
 * @since		19 Dec 2013
 */

namespace IPS\calendar;

/* To prevent PHP errors (extending class does not exist) revealing path */
if ( !\defined( '\IPS\SUITE_UNIQUE_KEY' ) )
{
	header( ( isset( $_SERVER['SERVER_PROTOCOL'] ) ? $_SERVER['SERVER_PROTOCOL'] : 'HTTP/1.0' ) . ' 403 Forbidden' );
	exit;
}

/**
 * iCalendar active record
 */
class _Icalendar extends \IPS\Patterns\ActiveRecord
{
	/**
	 * @brief	[ActiveRecord] Multiton Store
	 */
	protected static $multitons;

	/**
	 * @brief	[ActiveRecord] Database Table
	 */
	public static $databaseTable = 'calendar_import_feeds';
	
	/**
	 * @brief	[ActiveRecord] Database Prefix
	 */
	public static $databasePrefix = 'feed_';

	/**
	 * Set Default Values
	 *
	 * @return	void
	 */
	public function setDefaultValues()
	{
		$this->added		= time();
		$this->lastupdated	= time();
		$this->last_run		= time();
	}

	/**
	 * Reimport iCalendar events
	 *
	 * @return	int
	 * @throws	\UnexpectedValueException
	 * @note	PHP installs do not (at least typically) have stream wrappers for webcal://, so we have to change the scheme to http://
	 */
	public function refresh()
	{
		$this->last_run	= time();
		$this->save();

		$icsParser	= new \IPS\calendar\Icalendar\ICSParser;

		return $icsParser->parse( \IPS\Http\Url::external( str_replace( array( 'webcal://', 'webcals://' ), array( 'http://', 'https://' ), $this->url ) )->request()->get(), $this->calendar_id, $this->member_id, $this->id, $this->venue_id );
	}

	/**
	 * Delete events imported from an iCalendar feed
	 *
	 * @return	void
	 */
	public function deleteFeedEvents()
	{
		/* Looping over all event IDs this feed has imported, delete them */
		foreach( \IPS\Db::i()->select( '*', 'calendar_import_map', array( 'import_feed_id=?', $this->id ) ) as $mappedEvent )
		{
			try
			{
				\IPS\calendar\Event::load( $mappedEvent['import_event_id'] )->delete();
			}
			/* An out of range exception means the event no longer exists, so we can ignore the exception in this case */
			catch( \OutOfRangeException $e ){ }
		}
	}

	/**
	 * [ActiveRecord] Delete Record
	 *
	 * @return	void
	 */
	public function delete()
	{
		\IPS\Db::i()->delete( 'calendar_import_map', array( 'import_feed_id=?', $this->id ) );
		return parent::delete();
	}
}