<?php

/**

 * REST API: WP_REST_Search_Handler class

 *

 * @package WordPress

 * @subpackage REST_API

 * @since 5.0.0

 */

/**

 * Core base class representing a search handler for an object type in the REST API.

 *

 * @since 5.0.0

 */

abstract class WP_REST_Search_Handler {

	/**

	 * Field containing the IDs in the search result.

	 */

	const RESULT_IDS = 'ids';

	/**

	 * Field containing the total count in the search result.

	 */

	const RESULT_TOTAL = 'total';

	/**

	 * Object type managed by this search handler.

	 *

	 * @since 5.0.0

	 * @var string

	 */

	protected $type = '';

	/**

	 * Object subtypes managed by this search handler.

	 *

	 * @since 5.0.0

	 * @var array

	 */

	protected $subtypes = array();

	/**

	 * Gets the object type managed by this search handler.

	 *

	 * @since 5.0.0

	 *

	 * @return string Object type identifier.

	 */

	public function get_type() {

		return $this->type;

	}

	/**

	 * Gets the object subtypes managed by this search handler.

	 *

	 * @since 5.0.0

	 *

	 * @return array Array of object subtype identifiers.

	 */

	public function get_subtypes() {

		return $this->subtypes;

	}

	/**

	 * Searches the object type content for a given search request.

	 *

	 * @since 5.0.0

	 *

	 * @param WP_REST_Request $request Full REST request.

	 * @return array Associative array containing an `WP_REST_Search_Handler::RESULT_IDS` containing

	 *               an array of found IDs and `WP_REST_Search_Handler::RESULT_TOTAL` containing the

	 *               total count for the matching search results.

	 */

	abstract public function search_items( WP_REST_Request $request );

	/**

	 * Prepares the search result for a given ID.

	 *

	 * @since 5.0.0

	 *

	 * @param int   $id     Item ID.

	 * @param array $fields Fields to include for the item.

	 * @return array Associative array containing all fields for the item.

	 */

	abstract public function prepare_item( $id, array $fields );

	/**

	 * Prepares links for the search result of a given ID.

	 *

	 * @since 5.0.0

	 *

	 * @param int $id Item ID.

	 * @return array Links for the given item.

	 */

	abstract public function prepare_item_links( $id );

}