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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\Jpeg\Segment;
use Magento\MediaGalleryMetadata\Model\GetIptcMetadata;
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;
/**
* IPTC Reader to read IPTC data for jpeg image
*/
class ReadIptc implements ReadMetadataInterface
{
private const IPTC_SEGMENT_NAME = 'APP13';
private const IPTC_SEGMENT_START = 'Photoshop 3.0';
private const IPTC_DATA_START_POSITION = 0;
/**
* @var MetadataInterfaceFactory
*/
private $metadataFactory;
/**
* @var GetIptcMetadata
*/
private $getIptcData;
/**
* @param GetIptcMetadata $getIptcData
* @param MetadataInterfaceFactory $metadataFactory
*/
public function __construct(
GetIptcMetadata $getIptcData,
MetadataInterfaceFactory $metadataFactory
) {
$this->getIptcData = $getIptcData;
$this->metadataFactory = $metadataFactory;
}
/**
* @inheritdoc
*/
public function execute(FileInterface $file): MetadataInterface
{
foreach ($file->getSegments() as $segment) {
if ($this->isIptcSegment($segment)) {
return $this->getIptcData->execute($segment->getData());
}
}
return $this->metadataFactory->create([
'title' => null,
'description' => null,
'keywords' => null
]);
}
/**
* Does segment contain IPTC data
*
* @param SegmentInterface $segment
* @return bool
*/
private function isIptcSegment(SegmentInterface $segment): bool
{
return $segment->getName() === self::IPTC_SEGMENT_NAME
&& strncmp($segment->getData(), self::IPTC_SEGMENT_START, self::IPTC_DATA_START_POSITION) == 0;
}
}