<?php

/**

 * REST API: WP_REST_Sidebars_Controller class

 *

 * Original code from {@link https://github.com/martin-pettersson/wp-rest-api-sidebars Martin Pettersson (martin_pettersson@outlook.com)}.

 *

 * @package WordPress

 * @subpackage REST_API

 * @since 5.8.0

 */

/**

 * Core class used to manage a site's sidebars.

 *

 * @since 5.8.0

 *

 * @see WP_REST_Controller

 */

class WP_REST_Sidebars_Controller extends WP_REST_Controller {

	/**

	 * Sidebars controller constructor.

	 *

	 * @since 5.8.0

	 */

	public function __construct() {

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

		$this->rest_base = 'sidebars';

	}

	/**

	 * Registers the controllers routes.

	 *

	 * @since 5.8.0

	 */

	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' ),

					'args'                => array(

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

					),

				),

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

			)

		);

		register_rest_route(

			$this->namespace,

			'/' . $this->rest_base . '/(?P<id>[\w-]+)',

			array(

				array(

					'methods'             => WP_REST_Server::READABLE,

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

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

					'args'                => array(

						'id'      => array(

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

							'type'        => 'string',

						),

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

					),

				),

				array(

					'methods'             => WP_REST_Server::EDITABLE,

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

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

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

				),

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

			)

		);

	}

	/**

	 * Checks if a given request has access to get sidebars.

	 *

	 * @since 5.8.0

	 *

	 * @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 ) {

		return $this->do_permissions_check();

	}

	/**

	 * Retrieves the list of sidebars (active or inactive).

	 *

	 * @since 5.8.0

	 *

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

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

	 */

	public function get_items( $request ) {

		retrieve_widgets();

		$data = array();

		foreach ( wp_get_sidebars_widgets() as $id => $widgets ) {

			$sidebar = $this->get_sidebar( $id );

			if ( ! $sidebar ) {

				continue;

			}

			$data[] = $this->prepare_response_for_collection(

				$this->prepare_item_for_response( $sidebar, $request )

			);

		}

		return rest_ensure_response( $data );

	}

	/**

	 * Checks if a given request has access to get a single sidebar.

	 *

	 * @since 5.8.0

	 *

	 * @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_item_permissions_check( $request ) {

		return $this->do_permissions_check();

	}

	/**

	 * Retrieves one sidebar from the collection.

	 *

	 * @since 5.8.0

	 *

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

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

	 */

	public function get_item( $request ) {

		retrieve_widgets();

		$sidebar = $this->get_sidebar( $request['id'] );

		if ( ! $sidebar ) {

			return new WP_Error( 'rest_sidebar_not_found', __( 'No sidebar exists with that id.' ), array( 'status' => 404 ) );

		}

		return $this->prepare_item_for_response( $sidebar, $request );

	}

	/**

	 * Checks if a given request has access to update sidebars.

	 *

	 * @since 5.8.0

	 *

	 * @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 update_item_permissions_check( $request ) {

		return $this->do_permissions_check();

	}

	/**

	 * Updates a sidebar.

	 *

	 * @since 5.8.0

	 *

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

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

	 */

	public function update_item( $request ) {

		if ( isset( $request['widgets'] ) ) {

			$sidebars = wp_get_sidebars_widgets();

			foreach ( $sidebars as $sidebar_id => $widgets ) {

				foreach ( $widgets as $i => $widget_id ) {

					// This automatically removes the passed widget ids from any other sidebars in use.

					if ( $sidebar_id !== $request['id'] && in_array( $widget_id, $request['widgets'], true ) ) {

						unset( $sidebars[ $sidebar_id ][ $i ] );

					}

					// This automatically removes omitted widget ids to the inactive sidebar.

					if ( $sidebar_id === $request['id'] && ! in_array( $widget_id, $request['widgets'], true ) ) {

						$sidebars['wp_inactive_widgets'][] = $widget_id;

					}

				}

			}

			$sidebars[ $request['id'] ] = $request['widgets'];

			wp_set_sidebars_widgets( $sidebars );

		}

		$request['context'] = 'edit';

		$sidebar = $this->get_sidebar( $request['id'] );

		/**

		 * Fires after a sidebar is updated via the REST API.

		 *

		 * @since 5.8.0

		 *

		 * @param array           $sidebar The updated sidebar.

		 * @param WP_REST_Request $request Request object.

		 */

		do_action( 'rest_save_sidebar', $sidebar, $request );

		return $this->prepare_item_for_response( $sidebar, $request );

	}

	/**

	 * Checks if the user has permissions to make the request.

	 *

	 * @since 5.8.0

	 *

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

	 */

	protected function do_permissions_check() {

		// Verify if the current user has edit_theme_options capability.

		// This capability is required to access the widgets screen.

		if ( ! current_user_can( 'edit_theme_options' ) ) {

			return new WP_Error(

				'rest_cannot_manage_widgets',

				__( 'Sorry, you are not allowed to manage widgets on this site.' ),

				array( 'status' => rest_authorization_required_code() )

			);

		}

		return true;

	}

	/**

	 * Retrieves the registered sidebar with the given id.

	 *

	 * @since 5.8.0

	 *

	 * @global array $wp_registered_sidebars The registered sidebars.

	 *

	 * @param string|int $id ID of the sidebar.

	 * @return array|null The discovered sidebar, or null if it is not registered.

	 */

	protected function get_sidebar( $id ) {

		global $wp_registered_sidebars;

		foreach ( (array) $wp_registered_sidebars as $sidebar ) {

			if ( $sidebar['id'] === $id ) {

				return $sidebar;

			}

		}

		if ( 'wp_inactive_widgets' === $id ) {

			return array(

				'id'   => 'wp_inactive_widgets',

				'name' => __( 'Inactive widgets' ),

			);

		}

		return null;

	}

	/**

	 * Prepares a single sidebar output for response.

	 *

	 * @since 5.8.0

	 *

	 * @global array $wp_registered_sidebars The registered sidebars.

	 * @global array $wp_registered_widgets  The registered widgets.

	 *

	 * @param array           $raw_sidebar Sidebar instance.

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

	 * @return WP_REST_Response Prepared response object.

	 */

	public function prepare_item_for_response( $raw_sidebar, $request ) {

		global $wp_registered_sidebars, $wp_registered_widgets;

		$id      = $raw_sidebar['id'];

		$sidebar = array( 'id' => $id );

		if ( isset( $wp_registered_sidebars[ $id ] ) ) {

			$registered_sidebar = $wp_registered_sidebars[ $id ];

			$sidebar['status']        = 'active';

			$sidebar['name']          = isset( $registered_sidebar['name'] ) ? $registered_sidebar['name'] : '';

			$sidebar['description']   = isset( $registered_sidebar['description'] ) ? wp_sidebar_description( $id ) : '';

			$sidebar['class']         = isset( $registered_sidebar['class'] ) ? $registered_sidebar['class'] : '';

			$sidebar['before_widget'] = isset( $registered_sidebar['before_widget'] ) ? $registered_sidebar['before_widget'] : '';

			$sidebar['after_widget']  = isset( $registered_sidebar['after_widget'] ) ? $registered_sidebar['after_widget'] : '';

			$sidebar['before_title']  = isset( $registered_sidebar['before_title'] ) ? $registered_sidebar['before_title'] : '';

			$sidebar['after_title']   = isset( $registered_sidebar['after_title'] ) ? $registered_sidebar['after_title'] : '';

		} else {

			$sidebar['status']      = 'inactive';

			$sidebar['name']        = $raw_sidebar['name'];

			$sidebar['description'] = '';

			$sidebar['class']       = '';

		}

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

		if ( rest_is_field_included( 'widgets', $fields ) ) {

			$sidebars = wp_get_sidebars_widgets();

			$widgets  = array_filter(

				isset( $sidebars[ $sidebar['id'] ] ) ? $sidebars[ $sidebar['id'] ] : array(),

				static function ( $widget_id ) use ( $wp_registered_widgets ) {

					return isset( $wp_registered_widgets[ $widget_id ] );

				}

			);

			$sidebar['widgets'] = array_values( $widgets );

		}

		$schema = $this->get_item_schema();

		$data   = array();

		foreach ( $schema['properties'] as $property_id => $property ) {

			if ( isset( $sidebar[ $property_id ] ) && true === rest_validate_value_from_schema( $sidebar[ $property_id ], $property ) ) {

				$data[ $property_id ] = $sidebar[ $property_id ];

			} elseif ( isset( $property['default'] ) ) {

				$data[ $property_id ] = $property['default'];

			}

		}

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

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

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

		$response = rest_ensure_response( $data );

		$response->add_links( $this->prepare_links( $sidebar ) );

		/**

		 * Filters the REST API response for a sidebar.

		 *

		 * @since 5.8.0

		 *

		 * @param WP_REST_Response $response    The response object.

		 * @param array            $raw_sidebar The raw sidebar data.

		 * @param WP_REST_Request  $request     The request object.

		 */

		return apply_filters( 'rest_prepare_sidebar', $response, $raw_sidebar, $request );

	}

	/**

	 * Prepares links for the sidebar.

	 *

	 * @since 5.8.0

	 *

	 * @param array $sidebar Sidebar.

	 * @return array Links for the given widget.

	 */

	protected function prepare_links( $sidebar ) {

		return array(

			'collection'               => array(

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

			),

			'self'                     => array(

				'href' => rest_url( sprintf( '%s/%s/%s', $this->namespace, $this->rest_base, $sidebar['id'] ) ),

			),

			'https://api.w.org/widget' => array(

				'href'       => add_query_arg( 'sidebar', $sidebar['id'], rest_url( '/wp/v2/widgets' ) ),

				'embeddable' => true,

			),

		);

	}

	/**

	 * Retrieves the block type' schema, conforming to JSON Schema.

	 *

	 * @since 5.8.0

	 *

	 * @return array Item schema data.

	 */

	public function get_item_schema() {

		if ( $this->schema ) {

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

		}

		$schema = array(

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

			'title'      => 'sidebar',

			'type'       => 'object',

			'properties' => array(

				'id'            => array(

					'description' => __( 'ID of sidebar.' ),

					'type'        => 'string',

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

					'readonly'    => true,

				),

				'name'          => array(

					'description' => __( 'Unique name identifying the sidebar.' ),

					'type'        => 'string',

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

					'readonly'    => true,

				),

				'description'   => array(

					'description' => __( 'Description of sidebar.' ),

					'type'        => 'string',

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

					'readonly'    => true,

				),

				'class'         => array(

					'description' => __( 'Extra CSS class to assign to the sidebar in the Widgets interface.' ),

					'type'        => 'string',

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

					'readonly'    => true,

				),

				'before_widget' => array(

					'description' => __( 'HTML content to prepend to each widget\'s HTML output when assigned to this sidebar. Default is an opening list item element.' ),

					'type'        => 'string',

					'default'     => '',

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

					'readonly'    => true,

				),

				'after_widget'  => array(

					'description' => __( 'HTML content to append to each widget\'s HTML output when assigned to this sidebar. Default is a closing list item element.' ),

					'type'        => 'string',

					'default'     => '',

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

					'readonly'    => true,

				),

				'before_title'  => array(

					'description' => __( 'HTML content to prepend to the sidebar title when displayed. Default is an opening h2 element.' ),

					'type'        => 'string',

					'default'     => '',

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

					'readonly'    => true,

				),

				'after_title'   => array(