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<?php
/**
* @copyright Copyright 2022 Carl Schwan <carl@carlschwan.eu>
* @license AGPL-3.0-or-later
*
* This code is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License, version 3,
* along with this program. If not, see <http://www.gnu.org/licenses/>
*
*/
namespace OC\Metadata;
use OC\Metadata\Provider\ExifProvider;
use OCP\Files\File;
use OCP\IConfig;
use Psr\Log\LoggerInterface;
class MetadataManager implements IMetadataManager {
/** @var array<string, IMetadataProvider> */
private array $providers;
private array $providerClasses;
private FileMetadataMapper $fileMetadataMapper;
private IConfig $config;
private LoggerInterface $logger;
public function __construct(
FileMetadataMapper $fileMetadataMapper,
IConfig $config,
LoggerInterface $logger
) {
$this->providers = [];
$this->providerClasses = [];
$this->fileMetadataMapper = $fileMetadataMapper;
$this->config = $config;
$this->logger = $logger;
// TODO move to another place, where?
$this->registerProvider(ExifProvider::class);
}
/**
* @param class-string<IMetadataProvider> $className
*/
public function registerProvider(string $className):void {
if (in_array($className, $this->providerClasses)) {
return;
}
if (call_user_func([$className, 'isAvailable'])) {
$this->providers[call_user_func([$className, 'getMimetypesSupported'])] = \OC::$server->get($className);
}
}
public function generateMetadata(File $file, bool $checkExisting = false): void {
$existingMetadataGroups = [];
if ($checkExisting) {
$existingMetadata = $this->fileMetadataMapper->findForFile($file->getId());
foreach ($existingMetadata as $metadata) {
$existingMetadataGroups[] = $metadata->getGroupName();
}
}
foreach ($this->providers as $supportedMimetype => $provider) {
if (preg_match($supportedMimetype, $file->getMimeType())) {
if (count(array_diff($provider::groupsProvided(), $existingMetadataGroups)) > 0) {
$metaDataGroup = $provider->execute($file);
foreach ($metaDataGroup as $group => $metadata) {
$this->fileMetadataMapper->insertOrUpdate($metadata);
}
}
}
}
}
public function clearMetadata(int $fileId): void {
$this->fileMetadataMapper->clear($fileId);
}
public function fetchMetadataFor(string $group, array $fileIds): array {
return $this->fileMetadataMapper->findForGroupForFiles($fileIds, $group);
}
public function getCapabilities(): array {
$capabilities = [];
foreach ($this->providers as $supportedMimetype => $provider) {
$capabilities[$supportedMimetype] = $provider::groupsProvided();
}
return $capabilities;
}
}
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