memories/lib/Controller/FacesController.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 OCP\AppFramework\Http;
use OCP\AppFramework\Http\DataDisplayResponse;
use OCP\AppFramework\Http\DataResponse;
use OCP\AppFramework\Http\JSONResponse;
use OCP\Files\FileInfo;
class FacesController extends ApiBase
{
/**
* @NoAdminRequired
*
* Get list of faces with counts of images
*/
public function faces(): JSONResponse
{
$user = $this->userSession->getUser();
if (null === $user) {
return new JSONResponse([], Http::STATUS_PRECONDITION_FAILED);
}
// Check faces enabled for this user
if (!$this->recognizeIsEnabled()) {
return new JSONResponse(['message' => 'Recognize app not enabled or not v3+'], Http::STATUS_PRECONDITION_FAILED);
}
// If this isn't the timeline folder then things aren't going to work
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$root = $this->getRequestRoot();
if ($root->isEmpty()) {
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return new JSONResponse([], Http::STATUS_NOT_FOUND);
}
// Run actual query
$list = $this->timelineQuery->getFaces(
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$root,
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);
return new JSONResponse($list, Http::STATUS_OK);
}
/**
* @NoAdminRequired
*
* @NoCSRFRequired
*
* Get face preview image cropped with imagick
*
* @return DataResponse
*/
public function preview(string $id): Http\Response
{
$user = $this->userSession->getUser();
if (null === $user) {
return new DataResponse([], Http::STATUS_PRECONDITION_FAILED);
}
// Check faces enabled for this user
if (!$this->recognizeIsEnabled()) {
return new DataResponse([], Http::STATUS_PRECONDITION_FAILED);
}
// Get folder to search for
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$root = $this->getRequestRoot();
if ($root->isEmpty()) {
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return new JSONResponse([], Http::STATUS_NOT_FOUND);
}
// Run actual query
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$detections = $this->timelineQuery->getFacePreviewDetection($root, (int) $id);
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if (null === $detections || 0 === \count($detections)) {
return new DataResponse([], Http::STATUS_NOT_FOUND);
}
// Find the first detection that has a preview
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/** @var \Imagick */
$image = null;
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$userFolder = $this->rootFolder->getUserFolder($user->getUID());
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foreach ($detections as &$detection) {
// Get the file (also checks permissions)
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$files = $userFolder->getById($detection['file_id']);
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if (0 === \count($files) || FileInfo::TYPE_FILE !== $files[0]->getType()) {
continue;
}
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// Check read permission
if (!($files[0]->getPermissions() & \OCP\Constants::PERMISSION_READ)) {
continue;
}
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// Get (hopefully cached) preview image
try {
$preview = $this->previewManager->getPreview($files[0], 2048, 2048, false);
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$image = new \Imagick();
if (!$image->readImageBlob($preview->getContent())) {
throw new \Exception('Failed to read image blob');
}
$iw = $image->getImageWidth();
$ih = $image->getImageHeight();
if ($iw <= 0 || $ih <= 0) {
$image = null;
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throw new \Exception('Invalid image size');
}
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} catch (\Exception $e) {
continue;
}
// Got the preview
break;
}
// Make sure the preview is valid
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if (null === $image) {
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return new DataResponse([], Http::STATUS_NOT_FOUND);
}
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// Set quality and make progressive
$image->setImageCompressionQuality(80);
$image->setInterlaceScheme(\Imagick::INTERLACE_PLANE);
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// Crop image
$dw = (float) $detection['width'];
$dh = (float) $detection['height'];
$dcx = (float) $detection['x'] + (float) $detection['width'] / 2;
$dcy = (float) $detection['y'] + (float) $detection['height'] / 2;
$faceDim = max($dw * $iw, $dh * $ih) * 1.5;
$image->cropImage(
(int) $faceDim,
(int) $faceDim,
(int) ($dcx * $iw - $faceDim / 2),
(int) ($dcy * $ih - $faceDim / 2),
);
$image->scaleImage(256, 256, true);
$blob = $image->getImageBlob();
// Create and send response
$response = new DataDisplayResponse($blob, Http::STATUS_OK, [
'Content-Type' => $image->getImageMimeType(),
]);
$response->cacheFor(3600 * 24, false, false);
return $response;
}
}