<?php

/**

 * REST API: WP_REST_Template_Autosaves_Controller class.

 *

 * @package WordPress

 * @subpackage REST_API

 * @since 6.4.0

 */

/**

 * Core class used to access template autosaves via the REST API.

 *

 * @since 6.4.0

 *

 * @see WP_REST_Autosaves_Controller

 */

class WP_REST_Template_Autosaves_Controller extends WP_REST_Autosaves_Controller {

	/**

	 * Parent post type.

	 *

	 * @since 6.4.0

	 * @var string

	 */

	private $parent_post_type;

	/**

	 * Parent post controller.

	 *

	 * @since 6.4.0

	 * @var WP_REST_Controller

	 */

	private $parent_controller;

	/**

	 * Revision controller.

	 *

	 * @since 6.4.0

	 * @var WP_REST_Revisions_Controller

	 */

	private $revisions_controller;

	/**

	 * The base of the parent controller's route.

	 *

	 * @since 6.4.0

	 * @var string

	 */

	private $parent_base;

	/**

	 * Constructor.

	 *

	 * @since 6.4.0

	 *

	 * @param string $parent_post_type Post type of the parent.

	 */

	public function __construct( $parent_post_type ) {

		parent::__construct( $parent_post_type );

		$this->parent_post_type = $parent_post_type;

		$post_type_object       = get_post_type_object( $parent_post_type );

		$parent_controller      = $post_type_object->get_rest_controller();

		if ( ! $parent_controller ) {

			$parent_controller = new WP_REST_Templates_Controller( $parent_post_type );

		}

		$this->parent_controller = $parent_controller;

		$revisions_controller = $post_type_object->get_revisions_rest_controller();

		if ( ! $revisions_controller ) {

			$revisions_controller = new WP_REST_Revisions_Controller( $parent_post_type );

		}

		$this->revisions_controller = $revisions_controller;

		$this->rest_base            = 'autosaves';

		$this->parent_base          = ! empty( $post_type_object->rest_base ) ? $post_type_object->rest_base : $post_type_object->name;

		$this->namespace            = ! empty( $post_type_object->rest_namespace ) ? $post_type_object->rest_namespace : 'wp/v2';

	}

	/**

	 * Registers the routes for autosaves.

	 *

	 * @since 6.4.0

	 *

	 * @see register_rest_route()

	 */

	public function register_routes() {

		register_rest_route(

			$this->namespace,

			sprintf(

				'/%s/(?P<id>%s%s)/%s',

				$this->parent_base,

				/*

				 * Matches theme's directory: `/themes/<subdirectory>/<theme>/` or `/themes/<theme>/`.

				 * Excludes invalid directory name characters: `/:<>*?"|`.

				 */

				'([^\/:<>\*\?"\|]+(?:\/[^\/:<>\*\?"\|]+)?)',

				// Matches the template name.

				'[\/\w%-]+',

				$this->rest_base

			),

			array(

				'args'   => array(

					'id' => array(

						'description'       => __( 'The id of a template' ),

						'type'              => 'string',

						'sanitize_callback' => array( $this->parent_controller, '_sanitize_template_id' ),

					),

				),

				array(

					'methods'             => WP_REST_Server::READABLE,

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

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

					'args'                => $this->get_collection_params(),

				),

				array(

					'methods'             => WP_REST_Server::CREATABLE,

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

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

					'args'                => $this->parent_controller->get_endpoint_args_for_item_schema( WP_REST_Server::EDITABLE ),

				),

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

			)

		);

		register_rest_route(

			$this->namespace,

			sprintf(

				'/%s/(?P<parent>%s%s)/%s/%s',

				$this->parent_base,

				/*

				 * Matches theme's directory: `/themes/<subdirectory>/<theme>/` or `/themes/<theme>/`.

				 * Excludes invalid directory name characters: `/:<>*?"|`.

				 */

				'([^\/:<>\*\?"\|]+(?:\/[^\/:<>\*\?"\|]+)?)',

				// Matches the template name.

				'[\/\w%-]+',

				$this->rest_base,

				'(?P<id>[\d]+)'

			),

			array(

				'args'   => array(

					'parent' => array(

						'description'       => __( 'The id of a template' ),

						'type'              => 'string',

						'sanitize_callback' => array( $this->parent_controller, '_sanitize_template_id' ),

					),

					'id'     => array(

						'description' => __( 'The ID for the autosave.' ),

						'type'        => 'integer',

					),

				),

				array(

					'methods'             => WP_REST_Server::READABLE,

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

					'permission_callback' => array( $this->revisions_controller, 'get_item_permissions_check' ),

					'args'                => array(

						'context' => $this->get_context_param( array( 'default' => 'view' ) ),

					),

				),

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

			)

		);

	}

	/**

	 * Prepares the item for the REST response.

	 *

	 * @since 6.4.0

	 *

	 * @param WP_Post         $item    Post revision object.

	 * @param WP_REST_Request $request Request object.

	 * @return WP_REST_Response Response object.

	 */

	public function prepare_item_for_response( $item, $request ) {

		$template = _build_block_template_result_from_post( $item );

		$response = $this->parent_controller->prepare_item_for_response( $template, $request );

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

		$data   = $response->get_data();

		if ( in_array( 'parent', $fields, true ) ) {

			$data['parent'] = (int) $item->post_parent;

		}

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

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

		// Wrap the data in a response object.

		$response = new WP_REST_Response( $data );

		if ( rest_is_field_included( '_links', $fields ) || rest_is_field_included( '_embedded', $fields ) ) {

			$links = $this->prepare_links( $template );

			$response->add_links( $links );

		}

		return $response;

	}

	/**

	 * Gets the autosave, if the ID is valid.

	 *

	 * @since 6.4.0

	 *

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

	 * @return WP_Post|WP_Error Autosave post object if ID is valid, WP_Error otherwise.

	 */

	public function get_item( $request ) {

		$parent = $this->get_parent( $request['parent'] );

		if ( is_wp_error( $parent ) ) {

			return $parent;

		}

		$autosave = wp_get_post_autosave( $parent->ID );

		if ( ! $autosave ) {

			return new WP_Error(

				'rest_post_no_autosave',

				__( 'There is no autosave revision for this template.' ),

				array( 'status' => 404 )

			);

		}

		$response = $this->prepare_item_for_response( $autosave, $request );

		return $response;

	}

	/**

	 * Get the parent post.

	 *

	 * @since 6.4.0

	 *

	 * @param int $parent_id Supplied ID.

	 * @return WP_Post|WP_Error Post object if ID is valid, WP_Error otherwise.

	 */

	protected function get_parent( $parent_id ) {

		return $this->revisions_controller->get_parent( $parent_id );

	}

	/**

	 * Prepares links for the request.

	 *

	 * @since 6.4.0

	 *

	 * @param WP_Block_Template $template Template.

	 * @return array Links for the given post.

	 */

	protected function prepare_links( $template ) {

		$links = array(

			'self'   => array(

				'href' => rest_url( sprintf( '/%s/%s/%s/%s/%d', $this->namespace, $this->parent_base, $template->id, $this->rest_base, $template->wp_id ) ),

			),

			'parent' => array(

				'href' => rest_url( sprintf( '/%s/%s/%s', $this->namespace, $this->parent_base, $template->id ) ),

			),

		);

		return $links;

	}

	/**

	 * Retrieves the autosave's schema, conforming to JSON Schema.

	 *

	 * @since 6.4.0

	 *

	 * @return array Item schema data.

	 */

	public function get_item_schema() {

		if ( $this->schema ) {

			return $this->add_additional_fields_schema( $this->schema );

		}

		$this->schema = $this->revisions_controller->get_item_schema();

		return $this->add_additional_fields_schema( $this->schema );

	}

}