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<?php
/*
* This file is part of the TYPO3 CMS project.
*
* It is free software; you can redistribute it and/or modify it under
* the terms of the GNU General Public License, either version 2
* of the License, or any later version.
*
* For the full copyright and license information, please read the
* LICENSE.txt file that was distributed with this source code.
*
* The TYPO3 project - inspiring people to share!
*/
namespace TYPO3\CMS\Core\Resource\Index;
use TYPO3\CMS\Core\Resource;
use TYPO3\CMS\Core\Resource\File;
/**
* An Interface for MetaData extractors the FAL Indexer uses
*/
interface ExtractorInterface
{
/**
* Returns an array of supported file types;
* An empty array indicates all filetypes
*
* @return array
*/
public function getFileTypeRestrictions();
/**
* Get all supported DriverClasses
*
* Since some extractors may only work for local files, and other extractors
* are especially made for grabbing data from remote.
*
* Returns array of string with driver names of Drivers which are supported,
* If the driver did not register a name, it's the classname.
* empty array indicates no restrictions
*
* @return array
*/
public function getDriverRestrictions();
/**
* Returns the data priority of the extraction Service.
* Defines the precedence of Data if several extractors
* extracted the same property.
*
* Should be between 1 and 100, 100 is more important than 1
*
* @return int
*/
public function getPriority();
/**
* Returns the execution priority of the extraction Service
* Should be between 1 and 100, 100 means runs as first service, 1 runs at last service
*
* @return int
*/
public function getExecutionPriority();
/**
* Checks if the given file can be processed by this Extractor
*
* @return bool
*/
public function canProcess(File $file);
/**
* The actual processing TASK
*
* Should return an array with database properties for sys_file_metadata to write
*
* @param Resource\File $file
* @param array $previousExtractedData optional, contains the array of already extracted data
* @return array
*/
public function extractMetaData(File $file, array $previousExtractedData = []);
}