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<?php |
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/** |
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* ownCloud - galleryplus |
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* |
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* This file is licensed under the Affero General Public License version 3 or |
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* later. See the COPYING file. |
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* |
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* @author Olivier Paroz <[email protected]> |
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* @author Robin Appelman <[email protected]> |
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* |
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* @copyright Olivier Paroz 2014-2015 |
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* @copyright Robin Appelman 2012-2014 |
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*/ |
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namespace OCA\GalleryPlus\Controller; |
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use OCP\IURLGenerator; |
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use OCP\ILogger; |
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use OCP\Files\File; |
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use OCP\AppFramework\Http; |
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use OCA\GalleryPlus\Service\ServiceException; |
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use OCA\GalleryPlus\Service\NotFoundServiceException; |
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use OCA\GalleryPlus\Service\ConfigService; |
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use OCA\GalleryPlus\Service\ThumbnailService; |
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use OCA\GalleryPlus\Service\PreviewService; |
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use OCA\GalleryPlus\Service\DownloadService; |
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/** |
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* Class Preview |
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* |
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* @package OCA\GalleryPlus\Controller |
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*/ |
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trait Preview { |
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use HttpError; |
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/** @var IURLGenerator */ |
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private $urlGenerator; |
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/** @var ConfigService */ |
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private $configService; |
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/** @var ThumbnailService */ |
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private $thumbnailService; |
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/** @var PreviewService */ |
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private $previewService; |
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/** @var DownloadService */ |
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private $downloadService; |
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/** @var ILogger */ |
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private $logger; |
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/** @type bool */ |
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private $download = false; |
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/** |
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* Exits the controller in a live environment and throws an exception when testing |
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*/ |
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protected function exitController() { |
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if (defined('PHPUNIT_RUN')) { |
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throw new \Exception(); |
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// @codeCoverageIgnoreStart |
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} else { |
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exit(); |
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} |
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// @codeCoverageIgnoreEnd |
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} |
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/** |
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* Retrieves the thumbnail to send back to the browser |
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* |
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* The thumbnail is either a resized preview of the file or the original file |
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* Thumbnails are base64encoded before getting sent back |
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* |
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* |
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* @param int $fileId the ID of the file of which we need a thumbnail preview of |
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* @param bool $square whether the thumbnail should be square |
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* @param double $scale whether we're allowed to scale the preview up |
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* |
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* @return array<string,array|string> |
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*/ |
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private function getThumbnail($fileId, $square, $scale) { |
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list($width, $height, $aspect, $animatedPreview, $base64Encode) = |
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$this->thumbnailService->getThumbnailSpecs($square, $scale); |
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/** @type File $file */ |
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list($file, $preview, $status, $type) = |
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$this->getData( |
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$fileId, $width, $height, $aspect, $animatedPreview, $base64Encode |
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); |
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if ($preview === null) { |
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$preview = $this->prepareEmptyThumbnail($file, $status); |
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} else { |
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if ($type === 'preview') { |
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$preview['preview'] = |
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$this->previewService->previewValidator($square, $base64Encode); |
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} |
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} |
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return [$preview, $status]; |
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} |
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/** |
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* Returns either a generated preview, the file as-is or an empty object |
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* |
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* @param int $fileId |
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* @param int $width |
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* @param int $height |
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* @param bool $keepAspect |
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* @param bool $animatedPreview |
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* @param bool $base64Encode |
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* |
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* @return array<string,\OC_Image|string> |
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* |
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* @throws NotFoundServiceException |
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*/ |
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private function getData( |
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$fileId, $width, $height, $keepAspect = true, $animatedPreview = true, $base64Encode = false |
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) { |
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/** @type File $file */ |
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list($file, $status) = $this->getFile($fileId); |
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try { |
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if (!is_null($file)) { |
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$data = $this->getPreviewData( |
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$file, $animatedPreview, $width, $height, $keepAspect, $base64Encode |
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); |
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} else { |
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$data = $this->getErrorData($status); |
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} |
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} catch (ServiceException $exception) { |
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$data = $this->getExceptionData($exception); |
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} |
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array_unshift($data, $file); |
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return $data; |
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} |
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/** |
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* Returns the file of which a preview will be generated |
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* |
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* @param int $fileId |
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* |
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* @return array<File|int|null> |
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*/ |
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private function getFile($fileId) { |
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$status = Http::STATUS_OK; |
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try { |
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/** @type File $file */ |
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$file = $this->previewService->getResourceFromId($fileId); |
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$this->configService->validateMimeType($file->getMimeType()); |
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} catch (ServiceException $exception) { |
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$file = null; |
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$status = $this->getHttpStatusCode($exception); |
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} |
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return [$file, $status]; |
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} |
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/** |
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* @param File $file |
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* @param bool $animatedPreview |
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* @param int $width |
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* @param int $height |
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* @param bool $keepAspect |
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* @param bool $base64Encode |
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* |
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* @return array |
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*/ |
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private function getPreviewData( |
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$file, $animatedPreview, $width, $height, $keepAspect, $base64Encode |
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) { |
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$status = Http::STATUS_OK; |
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if ($this->previewService->isPreviewRequired($file, $animatedPreview)) { |
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$type = 'preview'; |
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$preview = $this->previewService->createPreview( |
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$file, $width, $height, $keepAspect, $base64Encode |
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); |
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} else { |
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$type = 'download'; |
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$preview = $this->downloadService->downloadFile($file, $base64Encode); |
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} |
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if (!$preview) { |
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list($preview, $status, $type) = $this->getErrorData(); |
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} |
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return [$preview, $status, $type]; |
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} |
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/** |
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* Returns an error array |
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* |
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* @param $status |
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* |
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* @return array<null|int|string> |
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*/ |
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private function getErrorData($status = Http::STATUS_INTERNAL_SERVER_ERROR) { |
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return [null, $status, 'error']; |
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} |
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/** |
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* Returns an error array |
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* |
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* @param ServiceException $exception |
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* |
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* @return array<null|int|string> |
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*/ |
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private function getExceptionData($exception) { |
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$code = $this->getHttpStatusCode($exception); |
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return $this->getErrorData($code); |
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} |
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/** |
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* Prepares an empty Thumbnail array to send back |
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* |
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* When we can't even get the file information, we send an empty mimeType |
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* |
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* @param File $file |
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* @param int $status |
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* |
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* @return array<string,null|string> |
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*/ |
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private function prepareEmptyThumbnail($file, $status) { |
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$thumbnail = []; |
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if ($status !== Http::STATUS_NOT_FOUND) { |
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$mimeType = ''; |
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if ($file) { |
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$mimeType = $file->getMimeType(); |
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} |
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$thumbnail = ['preview' => null, 'mimetype' => $mimeType]; |
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} |
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return $thumbnail; |
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} |
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} |
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interfasys /
galleryplus
