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class OffsetPage in Drupal 8

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

Value object for containing the requested offset and page parameters.

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

Hierarchy

Expanded class hierarchy of OffsetPage

See also

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

jsonapi.api.php

3 files declare their use of OffsetPage
EntityResource.php in core/modules/jsonapi/src/Controller/EntityResource.php
JsonApiFunctionalTest.php in core/modules/jsonapi/tests/src/Functional/JsonApiFunctionalTest.php
OffsetPageTest.php in core/modules/jsonapi/tests/src/Unit/Query/OffsetPageTest.php

File

core/modules/jsonapi/src/Query/OffsetPage.php, line 17

Namespace

Drupal\jsonapi\Query
View source
class OffsetPage {

  /**
   * The JSON:API pagination key name.
   *
   * @var string
   */
  const KEY_NAME = 'page';

  /**
   * The offset key in the page parameter: page[offset].
   *
   * @var string
   */
  const OFFSET_KEY = 'offset';

  /**
   * The size key in the page parameter: page[limit].
   *
   * @var string
   */
  const SIZE_KEY = 'limit';

  /**
   * Default offset.
   *
   * @var int
   */
  const DEFAULT_OFFSET = 0;

  /**
   * Max size.
   *
   * @var int
   */
  const SIZE_MAX = 50;

  /**
   * The offset for the query.
   *
   * @var int
   */
  protected $offset;

  /**
   * The size of the query.
   *
   * @var int
   */
  protected $size;

  /**
   * Instantiates an OffsetPage object.
   *
   * @param int $offset
   *   The query offset.
   * @param int $size
   *   The query size limit.
   */
  public function __construct($offset, $size) {
    $this->offset = $offset;
    $this->size = $size;
  }

  /**
   * Returns the current offset.
   *
   * @return int
   *   The query offset.
   */
  public function getOffset() {
    return $this->offset;
  }

  /**
   * Returns the page size.
   *
   * @return int
   *   The requested size of the query result.
   */
  public function getSize() {
    return $this->size;
  }

  /**
   * Creates an OffsetPage object from a query parameter.
   *
   * @param mixed $parameter
   *   The `page` query parameter from the Symfony request object.
   *
   * @return static
   *   An OffsetPage object with defaults.
   */
  public static function createFromQueryParameter($parameter) {
    if (!is_array($parameter)) {
      $cacheability = (new CacheableMetadata())
        ->addCacheContexts([
        'url.query_args:page',
      ]);
      throw new CacheableBadRequestHttpException($cacheability, 'The page parameter needs to be an array.');
    }
    $expanded = $parameter + [
      static::OFFSET_KEY => static::DEFAULT_OFFSET,
      static::SIZE_KEY => static::SIZE_MAX,
    ];
    if ($expanded[static::SIZE_KEY] > static::SIZE_MAX) {
      $expanded[static::SIZE_KEY] = static::SIZE_MAX;
    }
    return new static($expanded[static::OFFSET_KEY], $expanded[static::SIZE_KEY]);
  }

}

Members

Namesort descending Modifiers Type Description Overrides
OffsetPage::$offset protected property The offset for the query.
OffsetPage::$size protected property The size of the query.
OffsetPage::createFromQueryParameter public static function Creates an OffsetPage object from a query parameter.
OffsetPage::DEFAULT_OFFSET constant Default offset.
OffsetPage::getOffset public function Returns the current offset.
OffsetPage::getSize public function Returns the page size.
OffsetPage::KEY_NAME constant The JSON:API pagination key name.
OffsetPage::OFFSET_KEY constant The offset key in the page parameter: page[offset].
OffsetPage::SIZE_KEY constant The size key in the page parameter: page[limit].
OffsetPage::SIZE_MAX constant Max size.
OffsetPage::__construct public function Instantiates an OffsetPage object.