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ImageDerivative.php
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ImageDerivative.php
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<?php
namespace Drupal\graphql\Plugin\GraphQL\DataProducer\Entity\Fields\Image;
use Drupal\Core\Cache\RefinableCacheableDependencyInterface;
use Drupal\Core\Plugin\ContainerFactoryPluginInterface;
use Drupal\Core\Render\RenderContext;
use Drupal\Core\Render\RendererInterface;
use Drupal\file\FileInterface;
use Drupal\graphql\Plugin\GraphQL\DataProducer\DataProducerPluginBase;
use Drupal\image\Entity\ImageStyle;
use Symfony\Component\DependencyInjection\ContainerInterface;
/**
* @DataProducer(
* id = "image_derivative",
* name = @Translation("Image Derivative"),
* description = @Translation("Returns an image derivative."),
* produces = @ContextDefinition("any",
* label = @Translation("Image derivative properties")
* ),
* consumes = {
* "entity" = @ContextDefinition("entity",
* label = @Translation("Entity"),
* required = FALSE
* ),
* "style" = @ContextDefinition("string",
* label = @Translation("Image style")
* )
* }
* )
*/
class ImageDerivative extends DataProducerPluginBase implements ContainerFactoryPluginInterface {
/**
* The rendering service.
*
* @var \Drupal\Core\Render\RendererInterface
*/
protected $renderer;
/**
* {@inheritdoc}
*
* @codeCoverageIgnore
*/
public static function create(ContainerInterface $container, array $configuration, $pluginId, $pluginDefinition) {
return new static(
$configuration,
$pluginId,
$pluginDefinition,
$container->get('renderer')
);
}
/**
* ImageDerivative constructor.
*
* @param array $configuration
* The plugin configuration array.
* @param string $pluginId
* The plugin id.
* @param mixed $pluginDefinition
* The plugin definition.
* @param \Drupal\Core\Render\RendererInterface $renderer
* The renderer service.
*
* @codeCoverageIgnore
*/
public function __construct(
array $configuration,
$pluginId,
$pluginDefinition,
RendererInterface $renderer
) {
parent::__construct($configuration, $pluginId, $pluginDefinition);
$this->renderer = $renderer;
}
/**
* @param \Drupal\file\FileInterface $entity
*
* @param string $style
* @param \Drupal\Core\Cache\RefinableCacheableDependencyInterface $metadata
*
* @return mixed
*/
public function resolve(FileInterface $entity = NULL, $style, RefinableCacheableDependencyInterface $metadata) {
// Return if we dont have an entity.
if (!$entity) {
return NULL;
}
$access = $entity->access('view', NULL, TRUE);
$metadata->addCacheableDependency($access);
if ($access->isAllowed() && $image_style = ImageStyle::load($style)) {
$width = $entity->width;
$height = $entity->height;
if (empty($width) || empty($height)) {
/** @var \Drupal\Core\Image\ImageInterface $image */
$image = \Drupal::service('image.factory')->get($entity->getFileUri());
if ($image->isValid()) {
$width = $image->getWidth();
$height = $image->getHeight();
}
}
// Determine the dimensions of the styled image.
$dimensions = [
'width' => $width,
'height' => $height,
];
$image_style->transformDimensions($dimensions, $entity->getFileUri());
$metadata->addCacheableDependency($image_style);
// The underlying URL generator that will be invoked will leak cache
// metadata, resulting in an exception. By wrapping within a new render
// context, we can capture the leaked metadata and make sure it gets
// incorporated into the response.
$context = new RenderContext();
$url = $this->renderer->executeInRenderContext($context, function () use ($image_style, $entity) {
return $image_style->buildUrl($entity->getFileUri());
});
if (!$context->isEmpty()) {
$metadata->addCacheableDependency($context->pop());
}
return [
'url' => $url,
'width' => $dimensions['width'],
'height' => $dimensions['height'],
];
}
return NULL;
}
}