memories/lib/Controller/ClustersController.php

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<?php
declare(strict_types=1);
/**
* @copyright Copyright (c) 2022 Varun Patil <radialapps@gmail.com>
* @author Varun Patil <radialapps@gmail.com>
* @license AGPL-3.0-or-later
*
* 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 OCA\Memories\Controller;
use OCA\Memories\ClustersBackend;
use OCA\Memories\Exceptions;
use OCA\Memories\Util;
use OCP\AppFramework\Http;
use OCP\AppFramework\Http\DataDisplayResponse;
use OCP\AppFramework\Http\JSONResponse;
class ClustersController extends GenericApiController
{
/** Current backend for this instance */
protected ClustersBackend\Backend $backend;
/**
* @NoAdminRequired
*
* Get list of clusters
*/
public function list(string $backend): Http\Response
{
return Util::guardEx(function () use ($backend) {
$this->init($backend);
$list = $this->backend->getClusters();
// Set cluster_id and cluster_type for each cluster
foreach ($list as &$cluster) {
$cluster['cluster_id'] = $this->backend->getClusterId($cluster);
$cluster['cluster_type'] = $this->backend->clusterType();
}
return new JSONResponse($list, Http::STATUS_OK);
});
}
/**
* @NoAdminRequired
*
* @NoCSRFRequired
*
* Get preview for a cluster
*/
public function preview(string $backend, string $name): Http\Response
{
return Util::guardEx(function () use ($backend, $name) {
$this->init($backend);
// Get list of some photos in this cluster
$photos = $this->backend->getPhotos($name, 8);
// If no photos found then return 404
if (0 === \count($photos)) {
return new JSONResponse([], Http::STATUS_NOT_FOUND);
}
// Put the photos in the correct order
$this->backend->sortPhotosForPreview($photos);
// Get preview from image list
return $this->getPreviewFromPhotoList($photos);
});
}
/**
* @NoAdminRequired
*
* @UseSession
*
* Download a cluster as a zip file
*/
public function download(string $backend, string $name): Http\Response
{
return Util::guardEx(function () use ($backend, $name) {
$this->init($backend);
// Get list of all files in this cluster
$photos = $this->backend->getPhotos($name);
$fileIds = array_map(fn ($p) => $this->backend->getFileId($p), $photos);
// Get download handle
$filename = $this->backend->clusterName($name);
$handle = \OCA\Memories\Controller\DownloadController::createHandle($filename, $fileIds);
return new JSONResponse(['handle' => $handle], Http::STATUS_OK);
});
}
/**
* Initialize and check if the app is enabled.
* Gets the root node if required.
*/
protected function init(string $backend): void
{
Util::getUser();
$this->backend = ClustersBackend\Manager::get($backend);
if (!$this->backend->isEnabled()) {
throw Exceptions::NotEnabled($this->backend->appName());
}
}
/**
* Given a list of photo objects, return the first preview image possible.
*/
private function getPreviewFromPhotoList(array $photos): Http\Response
{
// Get preview manager
$previewManager = \OC::$server->get(\OCP\IPreview::class);
// Try to get a preview
foreach ($photos as $img) {
// Get preview image
try {
$quality = $this->backend->getPreviewQuality();
$file = $this->fs->getUserFile($this->backend->getFileId($img));
$file = $previewManager->getPreview($file, $quality, $quality, false);
[$blob, $mimetype] = $this->backend->getPreviewBlob($file, $img);
$response = new DataDisplayResponse($blob, Http::STATUS_OK, [
'Content-Type' => $mimetype,
]);
$response->cacheFor(3600 * 24, false, false);
return $response;
} catch (\Exception $e) {
continue;
}
}
throw Exceptions::NotFound('preview from photos list');
}
}