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<?php |
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namespace App\Service; |
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use App\Entity\Image; |
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use Doctrine\ORM\EntityManagerInterface; |
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use Google\Cloud\Vision\V1\Feature; |
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use Google\Cloud\Vision\V1\Feature\Type; |
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use Google\Cloud\Vision\V1\ImageAnnotatorClient; |
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use Psr\Log\LoggerInterface; |
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class GoogleImageTaggingService implements ImageTaggingServiceInterface |
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{ |
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/** @var EntityManagerInterface */ |
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private $entityManager; |
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/** @var ImageAnnotatorClient */ |
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private $client; |
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/** @var LoggerInterface */ |
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private $logger; |
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public function __construct( |
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string $projectId, |
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string $serviceAccountFile, |
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EntityManagerInterface $entityManager, |
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LoggerInterface $logger |
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) |
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{ |
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$this->client = new ImageAnnotatorClient([ |
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'projectId' => $projectId, |
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'credentials' => $serviceAccountFile |
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]); |
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$this->entityManager = $entityManager; |
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$this->logger = $logger; |
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} |
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public function tagImage(Image $image, bool $overwriteExisting = false): bool |
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{ |
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if ($overwriteExisting === false && ($image->getAutoTagsCount() > 0 || $image->getTextTagsCount() > 0)) { |
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return false; |
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} |
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$labelDetection = new Feature(); |
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$labelDetection->setType(Type::LABEL_DETECTION); |
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$labelDetection->setMaxResults(15); |
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$textDetection = new Feature(); |
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$textDetection->setType(Type::TEXT_DETECTION); |
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$textDetection->setMaxResults(100); |
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$result = $this->client->annotateImage( |
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$this->getImageToSend($image), |
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[$labelDetection, $textDetection] |
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); |
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$tags = []; |
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foreach ($result->getLabelAnnotations() as $annotation) { |
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$tags[] = $annotation->getDescription(); |
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} |
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$image->setAutoTags($tags); |
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$tags = []; |
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foreach ($result->getTextAnnotations() as $annotation) { |
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$tags[] = $annotation->getDescription(); |
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} |
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$image->setTextTags($tags); |
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$this->entityManager->persist($image); |
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$this->entityManager->flush(); // Calling the API's a lot more overhead; we might as well flush on every image. |
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return true; |
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} |
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/** |
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* |
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* Can be overridden, e.g. our dev service overrides this to provide |
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* the actual image data through readfile as the dev service's URLs |
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* aren't public. |
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* |
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* @return mixed|string |
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*/ |
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protected function getImageToSend(Image $image) |
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{ |
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// We just send back a reasonable-resolution public URL |
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return $image->getMediumImageUri(); |
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} |
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} |
gothick /
omm
