<?php

/**

 * REST API: WP_REST_Block_Pattern_Catergories_Controller class

 *

 * @package    WordPress

 * @subpackage REST_API

 * @since      6.0.0

 */

/**

 * Core class used to access block pattern categories via the REST API.

 *

 * @since 6.0.0

 *

 * @see WP_REST_Controller

 */

class WP_REST_Block_Pattern_Categories_Controller extends WP_REST_Controller {

	/**

	 * Constructs the controller.

	 *

	 * @since 6.0.0

	 */

	public function __construct() {

		$this->namespace = 'wp/v2';

		$this->rest_base = 'block-patterns/categories';

	}

	/**

	 * Registers the routes for the objects of the controller.

	 *

	 * @since 6.0.0

	 */

	public function register_routes() {

		register_rest_route(

			$this->namespace,

			'/' . $this->rest_base,

			array(

				array(

					'methods'             => WP_REST_Server::READABLE,

					'callback'            => array( $this, 'get_items' ),

					'permission_callback' => array( $this, 'get_items_permissions_check' ),

				),

				'schema' => array( $this, 'get_public_item_schema' ),

			)

		);

	}

	/**

	 * Checks whether a given request has permission to read block patterns.

	 *

	 * @since 6.0.0

	 *

	 * @param WP_REST_Request $request Full details about the request.

	 * @return true|WP_Error True if the request has read access, WP_Error object otherwise.

	 */

	public function get_items_permissions_check( $request ) {

		if ( current_user_can( 'edit_posts' ) ) {

			return true;

		}

		foreach ( get_post_types( array( 'show_in_rest' => true ), 'objects' ) as $post_type ) {

			if ( current_user_can( $post_type->cap->edit_posts ) ) {

				return true;

			}

		}

		return new WP_Error(

			'rest_cannot_view',

			__( 'Sorry, you are not allowed to view the registered block pattern categories.' ),

			array( 'status' => rest_authorization_required_code() )

		);

	}

	/**

	 * Retrieves all block pattern categories.

	 *

	 * @since 6.0.0

	 *

	 * @param WP_REST_Request $request Full details about the request.

	 * @return WP_Error|WP_REST_Response Response object on success, or WP_Error object on failure.

	 */

	public function get_items( $request ) {

		$response   = array();

		$categories = WP_Block_Pattern_Categories_Registry::get_instance()->get_all_registered();

		foreach ( $categories as $category ) {

			$prepared_category = $this->prepare_item_for_response( $category, $request );

			$response[]        = $this->prepare_response_for_collection( $prepared_category );

		}

		return rest_ensure_response( $response );

	}

	/**

	 * Prepare a raw block pattern category before it gets output in a REST API response.

	 *

	 * @since 6.0.0

	 *

	 * @param array           $item    Raw category as registered, before any changes.

	 * @param WP_REST_Request $request Request object.

	 * @return WP_REST_Response|WP_Error Response object on success, or WP_Error object on failure.

	 */

	public function prepare_item_for_response( $item, $request ) {

		$fields = $this->get_fields_for_response( $request );

		$keys   = array( 'name', 'label' );

		$data   = array();

		foreach ( $keys as $key ) {

			if ( rest_is_field_included( $key, $fields ) ) {

				$data[ $key ] = $item[ $key ];

			}

		}

		$context = ! empty( $request['context'] ) ? $request['context'] : 'view';

		$data    = $this->add_additional_fields_to_object( $data, $request );

		$data    = $this->filter_response_by_context( $data, $context );

		return rest_ensure_response( $data );

	}

	/**

	 * Retrieves the block pattern category schema, conforming to JSON Schema.

	 *

	 * @since 6.0.0

	 *

	 * @return array Item schema data.

	 */

	public function get_item_schema() {

		$schema = array(

			'$schema'    => 'http://json-schema.org/draft-04/schema#',

			'title'      => 'block-pattern-category',

			'type'       => 'object',

			'properties' => array(

				'name'  => array(

					'description' => __( 'The category name.' ),

					'type'        => 'string',

					'readonly'    => true,

					'context'     => array( 'view', 'edit', 'embed' ),

				),

				'label' => array(

					'description' => __( 'The category label, in human readable format.' ),

					'type'        => 'string',

					'readonly'    => true,

					'context'     => array( 'view', 'edit', 'embed' ),

				),

			),

		);

		return $this->add_additional_fields_schema( $schema );

	}

}