<?php
/**
 * @brief		Background Task: Move Files from one storage method to another
 * @since		28 May 2014
 */

namespace IPS\core\extensions\core\Queue;

/* 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;
}

/**
 * Background Task: Deleted Moved Files
 */
class _DeleteMovedFiles
{
	
	/**
	 * @brief Number of files to delete per cycle
	 */
	public $batch = \IPS\REBUILD_NORMAL;
	
	/**
	 * Run Background Task
	 *
	 * @param	mixed						$data	Data as it was passed to \IPS\Task::queue()
	 * @param	int							$offset	Offset
	 * @return	int							New offset
	 * @throws	\IPS\Task\Queue\OutOfRangeException	Indicates offset doesn't exist and thus task is complete
	 */
	public function run( &$data, $offset )
	{
		$ids   = array();

		/* Get a more accurate count when the task is needed instead of caching when the task is created
			This is required since the task is created before the relevant 'move' logs are created */
		if( empty( $data['realCount'] ) )
		{
			$data['realCount'] = \IPS\Db::i()->select( 'COUNT(log_id)', 'core_file_logs', array( 'log_type=?', 'move' ) )->first();
		}
		
		foreach( \IPS\Db::i()->select( '*', 'core_file_logs', array( 'log_type=?', 'move' ), 'log_date DESC', array( 0, $this->batch ) ) as $row )
		{
			$ids[] = $row['log_id'];
			try
			{
				/* We shouldn't need to make sure the image has moved because any issue would have been logged and the moved flag not set */
				\IPS\File::get( $row['log_configuration_id'], trim( ( ( ! empty( $row['log_container'] ) ) ? $row['log_container'] . '/'  : '' ) . $row['log_filename'], '/' ) )->delete();
			}
			catch( \Exception $e )
			{
				/* Any issues with deletion will be logged, so we can still remove this row */
			}
		}

		if ( \count( $ids ) )
		{
			\IPS\Db::i()->delete( 'core_file_logs', array( \IPS\Db::i()->in( 'log_id', array_values( $ids ) ) ) );
			
			return $this->batch + $offset;
		}
		
		throw new \IPS\Task\Queue\OutOfRangeException;
	}
	
	/**
	 * Get Progress
	 *
	 * @param	mixed					$data	Data as it was passed to \IPS\Task::queue()
	 * @param	int						$offset	Offset
	 * @return	array( 'text' => 'Doing something...', 'complete' => 50 )	Text explaining task and percentage complete
	 * @throws	\OutOfRangeException	Indicates offset doesn't exist and thus task is complete
	 */
	public function getProgress( $data, $offset )
	{
		/* If we have a more accurate total count, use that */
		if ( isset( $data['realCount'] ) )
		{
			$count = $data['realCount'];
		}
		/* Pre-populated count estimate */
		elseif ( isset( $data['count'] ) )
		{
			$count = $data['count'];
		}
		/* Get a count of the current move records, however this isn't completely accurate for a total since we remove rows */
		else
		{
			/* If a count wasn't provided, just query for it */
			$count = \IPS\Db::i()->select( 'COUNT(*)', 'core_file_logs', array( 'log_type=?', 'move' ) )->first();
		}
		return array( 'text' => \IPS\Member::loggedIn()->language()->addToStack('deleting_moved_files'), 'complete' => $count ? round( ( 100 / $count * $offset ), 2 ) : 100 );
	}	
}