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<?php
/**
* Copyright © Magento, Inc. All rights reserved.
* See COPYING.txt for license details.
*/
declare(strict_types=1);
namespace Magento\MediaGalleryMetadata\Model\Png\Segment;
use Magento\MediaGalleryMetadataApi\Api\Data\MetadataInterface;
use Magento\MediaGalleryMetadataApi\Api\Data\MetadataInterfaceFactory;
use Magento\MediaGalleryMetadataApi\Model\FileInterface;
use Magento\MediaGalleryMetadataApi\Model\ReadMetadataInterface;
use Magento\MediaGalleryMetadataApi\Model\SegmentInterface;
use Magento\Framework\Exception\LocalizedException;
/**
* Jpeg EXIF Reader
*/
class ReadExif implements ReadMetadataInterface
{
private const EXIF_SEGMENT_NAME = 'eXIf';
/**
* @var MetadataInterfaceFactory
*/
private $metadataFactory;
/**
* @param MetadataInterfaceFactory $metadataFactory
*/
public function __construct(
MetadataInterfaceFactory $metadataFactory
) {
$this->metadataFactory = $metadataFactory;
}
/**
* @inheritdoc
*/
public function execute(FileInterface $file): MetadataInterface
{
if (!is_callable('exif_read_data')) {
throw new LocalizedException(
__('exif_read_data() must be enabled in php configuration')
);
}
foreach ($file->getSegments() as $segment) {
if ($this->isExifSegment($segment)) {
return $this->getExifData($segment);
}
}
return $this->metadataFactory->create([
'title' => null,
'description' => null,
'keywords' => null
]);
}
/**
* Parese exif data from segment
*
* @param SegmentInterface $segment
*/
private function getExifData(SegmentInterface $segment): MetadataInterface
{
$title = null;
$description = null;
$keywords = [];
$data = exif_read_data('data://image/jpeg;base64,' . base64_encode($segment->getData()));
if ($data) {
$title = isset($data['DocumentName']) ? $data['DocumentName'] : null;
$description = isset($data['ImageDescription']) ? $data['ImageDescription'] : null;
}
return $this->metadataFactory->create([
'title' => $title,
'description' => $description,
'keywords' => !empty($keywords) ? $keywords : null
]);
}
/**
* Does segment contain Exif data
*
* @param SegmentInterface $segment
* @return bool
*/
private function isExifSegment(SegmentInterface $segment): bool
{
return strcmp($segment->getName(), self::EXIF_SEGMENT_NAME) === 0;
}
}