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- <?php
-
- declare(strict_types=1);
-
- /**
- * @copyright Copyright (c) 2019 Robin Appelman <robin@icewind.nl>
- *
- * @author Robin Appelman <robin@icewind.nl>
- *
- * @license GNU AGPL version 3 or any later version
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU Affero General Public License as
- * published by the Free Software Foundation, either version 3 of the
- * License, or (at your option) any later version.
- *
- * 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
- * along with this program. If not, see <http://www.gnu.org/licenses/>.
- *
- */
-
- namespace OC\Preview;
-
- use OCP\Files\File;
- use OCP\Files\FileInfo;
- use OCP\IImage;
- use OCP\Preview\IProviderV2;
-
- abstract class ProviderV2 implements IProviderV2 {
- private $options;
-
- private $tmpFiles = [];
-
- /**
- * Constructor
- *
- * @param array $options
- */
- public function __construct(array $options = []) {
- $this->options = $options;
- }
-
- /**
- * @return string Regex with the mimetypes that are supported by this provider
- */
- abstract public function getMimeType(): string ;
-
- /**
- * Check if a preview can be generated for $path
- *
- * @param FileInfo $file
- * @return bool
- */
- public function isAvailable(FileInfo $file): bool {
- return true;
- }
-
- /**
- * get thumbnail for file at path $path
- *
- * @param File $file
- * @param int $maxX The maximum X size of the thumbnail. It can be smaller depending on the shape of the image
- * @param int $maxY The maximum Y size of the thumbnail. It can be smaller depending on the shape of the image
- * @return null|\OCP\IImage false if no preview was generated
- * @since 17.0.0
- */
- abstract public function getThumbnail(File $file, int $maxX, int $maxY): ?IImage;
-
- /**
- * Get a path to either the local file or temporary file
- *
- * @param File $file
- * @param int $maxSize maximum size for temporary files
- * @return string
- */
- protected function getLocalFile(File $file, int $maxSize = null): string {
- $useTempFile = $file->isEncrypted() || !$file->getStorage()->isLocal();
- if ($useTempFile) {
- $absPath = \OC::$server->getTempManager()->getTemporaryFile();
-
- $content = $file->fopen('r');
-
- if ($maxSize) {
- $content = stream_get_contents($content, $maxSize);
- }
-
- file_put_contents($absPath, $content);
- $this->tmpFiles[] = $absPath;
- return $absPath;
- } else {
- return $file->getStorage()->getLocalFile($file->getInternalPath());
- }
- }
-
- /**
- * Clean any generated temporary files
- */
- protected function cleanTmpFiles() {
- foreach ($this->tmpFiles as $tmpFile) {
- unlink($tmpFile);
- }
-
- $this->tmpFiles = [];
- }
- }
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