<?php
/**
 * @brief		Background Task

 * @since		21 Aug 2018
 */

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
 */
class _IndexSingleItem
{
	/**
	 * Parse data before queuing
	 *
	 * @param	array	$data
	 * @return	array
	 */
	public function preQueueData( $data )
	{
		$classname = $data['class'];
		
		\IPS\Log::debug( "Getting preQueueData for {$classname}", 'index_single_item' );
		
		if ( \in_array( 'IPS\Content\Comment', class_parents( $classname ) ) )
		{
			$where = array( array( $classname::$databasePrefix . $classname::$databaseColumnMap['item'] . '=?', $data['id'] ) );

			if( \IPS\Settings::i()->search_method == 'mysql' and \IPS\Settings::i()->search_index_timeframe )
			{
				if( isset( $classname::$databaseColumnMap['date'] ) )
				{
					$where[] = array( $classname::$databasePrefix . $classname::$databaseColumnMap['date'] . '> ?', \IPS\DateTime::ts( time() - ( 86400 * \IPS\Settings::i()->search_index_timeframe ) )->getTimestamp() );
				}
			}
		}
		else
		{
			/* Just in case an item slips in here */
			$where = array( array( $classname::$databasePrefix . $classname::$databaseColumnId . '=?', $data['id'] ) );
		}
		
		$data['count']		= \IPS\Db::i()->select( 'COUNT(*)', $classname::$databaseTable, $where )->first();
		$data['indexed']	= 0;
		$data['lastId']     = 0;
		$data['where']      = $where;

		if( $data['count'] == 0 )
		{
			return null;
		}

		return $data;
	}

	/**
	 * 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 )
	{
		$classname = $data['class'];
		$idColumn = $classname::$databaseColumnId;
		if ( !is_subclass_of( $classname, 'IPS\Content\Searchable' ) )
		{
			throw new \IPS\Task\Queue\OutOfRangeException;
		}
		
		$where = $data['where']; // We do not want to modify the stored where clause

		/* Refine results for ones we haven't done */
		$where[] = array( $classname::$databasePrefix . $classname::$databaseColumnId . '>?', $data['lastId'] );
		
		$done = 0;
		foreach( new \IPS\Patterns\ActiveRecordIterator( \IPS\Db::i()->select( '*', $classname::$databaseTable, $where, $classname::$databasePrefix . $classname::$databaseColumnId . ' ASC', 50 ), $classname ) AS $object )
		{
			/* If this comment is queued for deleting or pbr, skip it */
			if ( !\in_array( $object->hidden(), [ -2, -3 ] ) )
			{
				try
				{
					if ( !$object->isFutureDate() )
					{
						\IPS\Content\Search\Index::i()->index( $object );
					}
				}
				catch( \Exception $e )
				{
					\IPS\Log::log( $e, 'index_single_item' );
				}
				catch( \Throwable $e )
				{
					\IPS\Log::log( $e, 'index_single_item' );
				}
			}

			$data['lastId'] = $object->$idColumn;
			$done++;
		}
		
		if ( !$done )
		{
			throw new \IPS\Task\Queue\OutOfRangeException;
		}
		
		return $offset + $done;
	}
	
	/**
	 * 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 )
	{
		$class = $data['class'];
		$exploded = explode( '\\', $class );
		if ( !class_exists( $class ) or !\IPS\Application::appIsEnabled( $exploded[1] ) )
		{
			throw new \OutOfRangeException;
		}
		
		if ( \in_array( 'IPS\Content\Review', class_parents( $class ) ) )
		{
			$lang = \IPS\Member::loggedIn()->language()->addToStack('reindexing_single_item_reviews', FALSE, array( 'sprintf' => array( $data['url'], $data['title'] ) ) );
		}
		elseif ( \in_array( 'IPS\Content\Comment', class_parents( $class ) ) )
		{
			$lang = \IPS\Member::loggedIn()->language()->addToStack('reindexing_single_item_comments', FALSE, array( 'sprintf' => array( $data['url'], $data['title'] ) ) );
		}
		else
		{
			$lang = \IPS\Member::loggedIn()->language()->addToStack('reindexing_single_item', FALSE, array( 'sprintf' => array( $data['url'], $data['title'] ) ) );
		}
		
		return array( 'text' => $lang, 'complete' => $data['count'] ? ( round( 100 / $data['count'] * $offset, 2 ) ) : 100 );
	}
}