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<?php
/**
* ownCloud - gallery
*
* This file is licensed under the Affero General Public License version 3 or
* later. See the COPYING file.
*
* @author Olivier Paroz <owncloud@interfasys.ch>
*
* @copyright Olivier Paroz 2015
*/
namespace OCA\Gallery\Controller;
use OCP\IRequest;
use OCP\IURLGenerator;
use OCP\ILogger;
use OCP\Files\File;
use OCP\AppFramework\Controller;
use OCP\AppFramework\Http;
use OCP\AppFramework\Http\JSONResponse;
use OCA\Gallery\Http\ImageResponse;
use OCA\Gallery\Service\ConfigService;
use OCA\Gallery\Service\ThumbnailService;
use OCA\Gallery\Service\PreviewService;
use OCA\Gallery\Service\DownloadService;
use OCA\Gallery\Utility\EventSource;
/**
* Class PreviewController
*
* @package OCA\Gallery\Controller
*/
class PreviewController extends Controller {
use Preview;
/** @var EventSource */
private $eventSource;
/**
* Constructor
*
* @param string $appName
* @param IRequest $request
* @param IURLGenerator $urlGenerator
* @param ConfigService $configService
* @param ThumbnailService $thumbnailService
* @param PreviewService $previewService
* @param DownloadService $downloadService
* @param EventSource $eventSource
* @param ILogger $logger
*/
public function __construct(
$appName,
IRequest $request,
IURLGenerator $urlGenerator,
ConfigService $configService,
ThumbnailService $thumbnailService,
PreviewService $previewService,
DownloadService $downloadService,
EventSource $eventSource,
ILogger $logger
) {
parent::__construct($appName, $request);
$this->urlGenerator = $urlGenerator;
$this->configService = $configService;
$this->thumbnailService = $thumbnailService;
$this->previewService = $previewService;
$this->downloadService = $downloadService;
$this->eventSource = $eventSource;
$this->logger = $logger;
}
/**
* @NoAdminRequired
*
* Generates thumbnails
*
* Uses EventSource to send thumbnails back as soon as they're created
*
* FIXME: @LukasReschke says: The exit is required here because
* otherwise the AppFramework is trying to add headers as well after
* dispatching the request which results in a "Cannot modify header
* information" notice.
*
* WARNING: Returning a JSON response does not get rid of the problem
*
* @param string $ids the ID of the files of which we need thumbnail previews of
* @param bool $square
* @param double $scale
*
* @return array<string,array|string|null>
*/
public function getThumbnails($ids, $square, $scale) {
$idsArray = explode(';', $ids);
foreach ($idsArray as $id) {
// Casting to integer here instead of using array_map to extract IDs from the URL
list($thumbnail, $status) = $this->getThumbnail((int)$id, $square, $scale);
$thumbnail['fileid'] = $id;
$thumbnail['status'] = $status;
$this->eventSource->send('preview', $thumbnail);
}
$this->eventSource->close();
$this->exitController();
// @codeCoverageIgnoreStart
} // @codeCoverageIgnoreEnd
/**
* @NoAdminRequired
*
* Sends either a large preview of the requested file or the original file itself
*
* @param int $fileId the ID of the file of which we need a large preview of
* @param int $width
* @param int $height
*
* @return ImageResponse|Http\JSONResponse
*/
public function getPreview($fileId, $width, $height) {
/** @type File $file */
list($file, $preview, $status) = $this->getData($fileId, $width, $height);
if (!$preview) {
return new JSONResponse(
[
'message' => "I'm truly sorry, but we were unable to generate a preview for this file",
'success' => false
], $status
);
}
$preview['name'] = $file->getName();
return new ImageResponse($preview, $status);
}
}
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