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class ResourceObject in Drupal 8

Same name and namespace in other branches
  1. 9 core/modules/jsonapi/src/JsonApiResource/ResourceObject.php \Drupal\jsonapi\JsonApiResource\ResourceObject

Represents a JSON:API resource object.

This value object wraps a Drupal entity so that it can carry a JSON:API resource type object alongside it. It also helps abstract away differences between config and content entities within the JSON:API codebase.

@internal JSON:API maintains no PHP API. The API is the HTTP API. This class may change at any time and could break any dependencies on it.

Hierarchy

Expanded class hierarchy of ResourceObject

See also

https://www.drupal.org/project/drupal/issues/3032787

jsonapi.api.php

13 files declare their use of ResourceObject
EntityAccessChecker.php in core/modules/jsonapi/src/Access/EntityAccessChecker.php
EntityReferenceFieldNormalizer.php in core/modules/jsonapi/src/Normalizer/EntityReferenceFieldNormalizer.php
EntityResource.php in core/modules/jsonapi/src/Controller/EntityResource.php
FieldNormalizer.php in core/modules/jsonapi/src/Normalizer/FieldNormalizer.php
FileUpload.php in core/modules/jsonapi/src/Controller/FileUpload.php

... See full list

File

core/modules/jsonapi/src/JsonApiResource/ResourceObject.php, line 33

Namespace

Drupal\jsonapi\JsonApiResource
View source
class ResourceObject implements CacheableDependencyInterface, ResourceIdentifierInterface {
  use CacheableDependencyTrait;
  use ResourceIdentifierTrait;

  /**
   * The resource object's version identifier.
   *
   * @var string|null
   */
  protected $versionIdentifier;

  /**
   * The object's fields.
   *
   * This refers to "fields" in the JSON:API sense of the word. Config entities
   * do not have real fields, so in that case, this will be an array of values
   * for config entity attributes.
   *
   * @var \Drupal\Core\Field\FieldItemListInterface[]|mixed[]
   */
  protected $fields;

  /**
   * The resource object's links.
   *
   * @var \Drupal\jsonapi\JsonApiResource\LinkCollection
   */
  protected $links;

  /**
   * ResourceObject constructor.
   *
   * @param \Drupal\Core\Cache\CacheableDependencyInterface $cacheability
   *   The cacheability for the resource object.
   * @param \Drupal\jsonapi\ResourceType\ResourceType $resource_type
   *   The JSON:API resource type of the resource object.
   * @param string $id
   *   The resource object's ID.
   * @param mixed|null $revision_id
   *   The resource object's version identifier. NULL, if the resource object is
   *   not versionable.
   * @param array $fields
   *   An array of the resource object's fields, keyed by public field name.
   * @param \Drupal\jsonapi\JsonApiResource\LinkCollection $links
   *   The links for the resource object.
   */
  public function __construct(CacheableDependencyInterface $cacheability, ResourceType $resource_type, $id, $revision_id, array $fields, LinkCollection $links) {
    assert(is_null($revision_id) || $resource_type
      ->isVersionable());
    $this
      ->setCacheability($cacheability);
    $this->resourceType = $resource_type;
    $this->resourceIdentifier = new ResourceIdentifier($resource_type, $id);
    $this->versionIdentifier = $revision_id ? 'id:' . $revision_id : NULL;
    $this->fields = $fields;
    $this->links = $links
      ->withContext($this);
  }

  /**
   * Creates a new ResourceObject from an entity.
   *
   * @param \Drupal\jsonapi\ResourceType\ResourceType $resource_type
   *   The JSON:API resource type of the resource object.
   * @param \Drupal\Core\Entity\EntityInterface $entity
   *   The entity to be represented by this resource object.
   * @param \Drupal\jsonapi\JsonApiResource\LinkCollection $links
   *   (optional) Any links for the resource object, if a `self` link is not
   *   provided, one will be automatically added if the resource is locatable
   *   and is not an internal entity.
   *
   * @return static
   *   An instantiated resource object.
   */
  public static function createFromEntity(ResourceType $resource_type, EntityInterface $entity, LinkCollection $links = NULL) {
    return new static($entity, $resource_type, $entity
      ->uuid(), $resource_type
      ->isVersionable() && $entity instanceof RevisionableInterface ? $entity
      ->getRevisionId() : NULL, static::extractFieldsFromEntity($resource_type, $entity), static::buildLinksFromEntity($resource_type, $entity, $links ?: new LinkCollection([])));
  }

  /**
   * Whether the resource object has the given field.
   *
   * @param string $public_field_name
   *   A public field name.
   *
   * @return bool
   *   TRUE if the resource object has the given field, FALSE otherwise.
   */
  public function hasField($public_field_name) {
    return isset($this->fields[$public_field_name]);
  }

  /**
   * Gets the given field.
   *
   * @param string $public_field_name
   *   A public field name.
   *
   * @return mixed|\Drupal\Core\Field\FieldItemListInterface|null
   *   The field or NULL if the resource object does not have the given field.
   *
   * @see ::extractFields()
   */
  public function getField($public_field_name) {
    return $this
      ->hasField($public_field_name) ? $this->fields[$public_field_name] : NULL;
  }

  /**
   * Gets the ResourceObject's fields.
   *
   * @return array
   *   The resource object's fields, keyed by public field name.
   *
   * @see ::extractFields()
   */
  public function getFields() {
    return $this->fields;
  }

  /**
   * Gets the ResourceObject's links.
   *
   * @return \Drupal\jsonapi\JsonApiResource\LinkCollection
   *   The resource object's links.
   */
  public function getLinks() {
    return $this->links;
  }

  /**
   * Gets a version identifier for the ResourceObject.
   *
   * @return string
   *   The version identifier of the resource object, if the resource type is
   *   versionable.
   */
  public function getVersionIdentifier() {
    if (!$this->resourceType
      ->isVersionable()) {
      throw new \LogicException('Cannot get a version identifier for a non-versionable resource.');
    }
    return $this->versionIdentifier;
  }

  /**
   * Gets a Url for the ResourceObject.
   *
   * @return \Drupal\Core\Url
   *   The URL for the identified resource object.
   *
   * @throws \LogicException
   *   Thrown if the resource object is not locatable.
   *
   * @see \Drupal\jsonapi\ResourceType\ResourceTypeRepository::isLocatableResourceType()
   */
  public function toUrl() {
    foreach ($this->links as $key => $link) {
      if ($key === 'self') {
        $first = reset($link);
        return $first
          ->getUri();
      }
    }
    throw new \LogicException('A Url does not exist for this resource object because its resource type is not locatable.');
  }

  /**
   * Extracts the entity's fields.
   *
   * @param \Drupal\jsonapi\ResourceType\ResourceType $resource_type
   *   The JSON:API resource type of the given entity.
   * @param \Drupal\Core\Entity\EntityInterface $entity
   *   The entity from which fields should be extracted.
   *
   * @return mixed|\Drupal\Core\Field\FieldItemListInterface[]
   *   If the resource object represents a content entity, the fields will be
   *   objects satisfying FieldItemListInterface. If it represents a config
   *   entity, the fields will be scalar values or arrays.
   */
  protected static function extractFieldsFromEntity(ResourceType $resource_type, EntityInterface $entity) {
    assert($entity instanceof ContentEntityInterface || $entity instanceof ConfigEntityInterface);
    return $entity instanceof ContentEntityInterface ? static::extractContentEntityFields($resource_type, $entity) : static::extractConfigEntityFields($resource_type, $entity);
  }

  /**
   * Builds a LinkCollection for the given entity.
   *
   * @param \Drupal\jsonapi\ResourceType\ResourceType $resource_type
   *   The JSON:API resource type of the given entity.
   * @param \Drupal\Core\Entity\EntityInterface $entity
   *   The entity for which to build links.
   * @param \Drupal\jsonapi\JsonApiResource\LinkCollection $links
   *   (optional) Any extra links for the resource object, if a `self` link is
   *   not provided, one will be automatically added if the resource is
   *   locatable and is not an internal entity.
   *
   * @return \Drupal\jsonapi\JsonApiResource\LinkCollection
   *   The built links.
   */
  protected static function buildLinksFromEntity(ResourceType $resource_type, EntityInterface $entity, LinkCollection $links) {
    if ($resource_type
      ->isLocatable() && !$resource_type
      ->isInternal()) {
      $self_url = Url::fromRoute(Routes::getRouteName($resource_type, 'individual'), [
        'entity' => $entity
          ->uuid(),
      ]);
      if ($resource_type
        ->isVersionable()) {
        assert($entity instanceof RevisionableInterface);
        if (!$links
          ->hasLinkWithKey('self')) {

          // If the resource is versionable, the `self` link should be the exact
          // link for the represented version. This helps a client track
          // revision changes and to disambiguate resource objects with the same
          // `type` and `id` in a `version-history` collection.
          $self_with_version_url = $self_url
            ->setOption('query', [
            JsonApiSpec::VERSION_QUERY_PARAMETER => 'id:' . $entity
              ->getRevisionId(),
          ]);
          $links = $links
            ->withLink('self', new Link(new CacheableMetadata(), $self_with_version_url, 'self'));
        }
        if (!$entity
          ->isDefaultRevision()) {
          $latest_version_url = $self_url
            ->setOption('query', [
            JsonApiSpec::VERSION_QUERY_PARAMETER => 'rel:' . VersionByRel::LATEST_VERSION,
          ]);
          $links = $links
            ->withLink(VersionByRel::LATEST_VERSION, new Link(new CacheableMetadata(), $latest_version_url, VersionByRel::LATEST_VERSION));
        }
        if (!$entity
          ->isLatestRevision()) {
          $working_copy_url = $self_url
            ->setOption('query', [
            JsonApiSpec::VERSION_QUERY_PARAMETER => 'rel:' . VersionByRel::WORKING_COPY,
          ]);
          $links = $links
            ->withLink(VersionByRel::WORKING_COPY, new Link(new CacheableMetadata(), $working_copy_url, VersionByRel::WORKING_COPY));
        }
      }
      if (!$links
        ->hasLinkWithKey('self')) {
        $links = $links
          ->withLink('self', new Link(new CacheableMetadata(), $self_url, 'self'));
      }
    }
    return $links;
  }

  /**
   * Extracts a content entity's fields.
   *
   * @param \Drupal\jsonapi\ResourceType\ResourceType $resource_type
   *   The JSON:API resource type of the given entity.
   * @param \Drupal\Core\Entity\ContentEntityInterface $entity
   *   The config entity from which fields should be extracted.
   *
   * @return \Drupal\Core\Field\FieldItemListInterface[]
   *   The fields extracted from a content entity.
   */
  protected static function extractContentEntityFields(ResourceType $resource_type, ContentEntityInterface $entity) {
    $output = [];
    $fields = TypedDataInternalPropertiesHelper::getNonInternalProperties($entity
      ->getTypedData());

    // Filter the array based on the field names.
    $enabled_field_names = array_filter(array_keys($fields), [
      $resource_type,
      'isFieldEnabled',
    ]);

    // Special handling for user entities that allows a JSON:API user agent to
    // access the display name of a user. For example, this is useful when
    // displaying the name of a node's author.
    // @todo: eliminate this special casing in https://www.drupal.org/project/drupal/issues/3079254.
    $entity_type = $entity
      ->getEntityType();
    if ($entity_type
      ->id() == 'user' && $resource_type
      ->isFieldEnabled('display_name')) {
      assert($entity instanceof UserInterface);
      $display_name = $resource_type
        ->getPublicName('display_name');
      $output[$display_name] = $entity
        ->getDisplayName();
    }

    // Return a sub-array of $output containing the keys in $enabled_fields.
    $input = array_intersect_key($fields, array_flip($enabled_field_names));
    foreach ($input as $field_name => $field_value) {
      $public_field_name = $resource_type
        ->getPublicName($field_name);
      $output[$public_field_name] = $field_value;
    }
    return $output;
  }

  /**
   * Determines the entity type's (internal) label field name.
   *
   * @param \Drupal\Core\Entity\EntityInterface $entity
   *   The entity from which fields should be extracted.
   *
   * @return string
   *   The label field name.
   */
  protected static function getLabelFieldName(EntityInterface $entity) {
    $label_field_name = $entity
      ->getEntityType()
      ->getKey('label');

    // Special handling for user entities that allows a JSON:API user agent to
    // access the display name of a user. This is useful when displaying the
    // name of a node's author.
    // @see \Drupal\jsonapi\JsonApiResource\ResourceObject::extractContentEntityFields()
    // @todo: eliminate this special casing in https://www.drupal.org/project/drupal/issues/3079254.
    if ($entity
      ->getEntityTypeId() === 'user') {
      $label_field_name = 'display_name';
    }
    return $label_field_name;
  }

  /**
   * Extracts a config entity's fields.
   *
   * @param \Drupal\jsonapi\ResourceType\ResourceType $resource_type
   *   The JSON:API resource type of the given entity.
   * @param \Drupal\Core\Config\Entity\ConfigEntityInterface $entity
   *   The config entity from which fields should be extracted.
   *
   * @return array
   *   The fields extracted from a config entity.
   */
  protected static function extractConfigEntityFields(ResourceType $resource_type, ConfigEntityInterface $entity) {
    $enabled_public_fields = [];
    $fields = $entity
      ->toArray();

    // Filter the array based on the field names.
    $enabled_field_names = array_filter(array_keys($fields), function ($internal_field_name) use ($resource_type) {

      // Config entities have "fields" which aren't known to the resource type,
      // these fields should not be excluded because they cannot be enabled or
      // disabled.
      return !$resource_type
        ->hasField($internal_field_name) || $resource_type
        ->isFieldEnabled($internal_field_name);
    });

    // Return a sub-array of $output containing the keys in $enabled_fields.
    $input = array_intersect_key($fields, array_flip($enabled_field_names));

    /* @var \Drupal\Core\Config\Entity\ConfigEntityInterface $entity */
    foreach ($input as $field_name => $field_value) {
      $public_field_name = $resource_type
        ->getPublicName($field_name);
      $enabled_public_fields[$public_field_name] = $field_value;
    }
    return $enabled_public_fields;
  }

}

Members

Namesort descending Modifiers Type Description Overrides
CacheableDependencyTrait::$cacheContexts protected property Cache contexts.
CacheableDependencyTrait::$cacheMaxAge protected property Cache max-age.
CacheableDependencyTrait::$cacheTags protected property Cache tags.
CacheableDependencyTrait::getCacheContexts public function 3
CacheableDependencyTrait::getCacheMaxAge public function 3
CacheableDependencyTrait::getCacheTags public function 3
CacheableDependencyTrait::setCacheability protected function Sets cacheability; useful for value object constructors.
ResourceIdentifierTrait::$resourceIdentifier protected property A ResourceIdentifier object.
ResourceIdentifierTrait::$resourceType protected property The JSON:API resource type of the identified resource object.
ResourceIdentifierTrait::getId public function
ResourceIdentifierTrait::getResourceType public function
ResourceIdentifierTrait::getTypeName public function
ResourceObject::$fields protected property The object's fields.
ResourceObject::$links protected property The resource object's links.
ResourceObject::$versionIdentifier protected property The resource object's version identifier.
ResourceObject::buildLinksFromEntity protected static function Builds a LinkCollection for the given entity.
ResourceObject::createFromEntity public static function Creates a new ResourceObject from an entity. 1
ResourceObject::extractConfigEntityFields protected static function Extracts a config entity's fields.
ResourceObject::extractContentEntityFields protected static function Extracts a content entity's fields.
ResourceObject::extractFieldsFromEntity protected static function Extracts the entity's fields. 1
ResourceObject::getField public function Gets the given field.
ResourceObject::getFields public function Gets the ResourceObject's fields.
ResourceObject::getLabelFieldName protected static function Determines the entity type's (internal) label field name.
ResourceObject::getLinks public function Gets the ResourceObject's links.
ResourceObject::getVersionIdentifier public function Gets a version identifier for the ResourceObject.
ResourceObject::hasField public function Whether the resource object has the given field.
ResourceObject::toUrl public function Gets a Url for the ResourceObject.
ResourceObject::__construct public function ResourceObject constructor.