<?php

/**

 * REST API: WP_REST_Themes_Controller class

 *

 * @package WordPress

 * @subpackage REST_API

 * @since 5.0.0

 */

/**

 * Core class used to manage themes via the REST API.

 *

 * @since 5.0.0

 *

 * @see WP_REST_Controller

 */

class WP_REST_Themes_Controller extends WP_REST_Controller {

	/**

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

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

	 */

	const PATTERN = '[^\/:<>\*\?"\|]+(?:\/[^\/:<>\*\?"\|]+)?';

	/**

	 * Constructor.

	 *

	 * @since 5.0.0

	 */

	public function __construct() {

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

		$this->rest_base = 'themes';

	}

	/**

	 * Registers the routes for themes.

	 *

	 * @since 5.0.0

	 *

	 * @see register_rest_route()

	 */

	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'                => $this->get_collection_params(),

				),

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

			)

		);

		register_rest_route(

			$this->namespace,

			sprintf( '/%s/(?P<stylesheet>%s)', $this->rest_base, self::PATTERN ),

			array(

				'args'   => array(

					'stylesheet' => array(

						'description'       => __( "The theme's stylesheet. This uniquely identifies the theme." ),

						'type'              => 'string',

						'sanitize_callback' => array( $this, '_sanitize_stylesheet_callback' ),

					),

				),

				array(

					'methods'             => WP_REST_Server::READABLE,

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

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

				),

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

			)

		);

	}

	/**

	 * Sanitize the stylesheet to decode endpoint.

	 *

	 * @since 5.9.0

	 *

	 * @param string $stylesheet The stylesheet name.

	 * @return string Sanitized stylesheet.

	 */

	public function _sanitize_stylesheet_callback( $stylesheet ) {

		return urldecode( $stylesheet );

	}

	/**

	 * Checks if a given request has access to read the theme.

	 *

	 * @since 5.0.0

	 *

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

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

	 */

	public function get_items_permissions_check( $request ) {

		if ( current_user_can( 'switch_themes' ) || current_user_can( 'manage_network_themes' ) ) {

			return true;

		}

		$registered = $this->get_collection_params();

		if ( isset( $registered['status'], $request['status'] ) && is_array( $request['status'] ) && array( 'active' ) === $request['status'] ) {

			return $this->check_read_active_theme_permission();

		}

		return new WP_Error(

			'rest_cannot_view_themes',

			__( 'Sorry, you are not allowed to view themes.' ),

			array( 'status' => rest_authorization_required_code() )

		);

	}

	/**

	 * Checks if a given request has access to read the theme.

	 *

	 * @since 5.7.0

	 *

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

	 */

	public function get_item_permissions_check( $request ) {

		if ( current_user_can( 'switch_themes' ) || current_user_can( 'manage_network_themes' ) ) {

			return true;

		}

		$wp_theme      = wp_get_theme( $request['stylesheet'] );

		$current_theme = wp_get_theme();

		if ( $this->is_same_theme( $wp_theme, $current_theme ) ) {

			return $this->check_read_active_theme_permission();

		}

		return new WP_Error(

			'rest_cannot_view_themes',

			__( 'Sorry, you are not allowed to view themes.' ),

			array( 'status' => rest_authorization_required_code() )

		);

	}

	/**

	 * Checks if a theme can be read.

	 *

	 * @since 5.7.0

	 *

	 */

	protected function check_read_active_theme_permission() {

		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_active_theme',

			__( 'Sorry, you are not allowed to view the active theme.' ),

			array( 'status' => rest_authorization_required_code() )

		);

	}

	/**

	 * Retrieves a single theme.

	 *

	 * @since 5.7.0

	 *

	 * @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 ) {

		$wp_theme = wp_get_theme( $request['stylesheet'] );

		if ( ! $wp_theme->exists() ) {

			return new WP_Error(

				'rest_theme_not_found',

				__( 'Theme not found.' ),

				array( 'status' => 404 )

			);

		}

		$data = $this->prepare_item_for_response( $wp_theme, $request );

		return rest_ensure_response( $data );

	}

	/**

	 * Retrieves a collection of themes.

	 *

	 * @since 5.0.0

	 *

	 * @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 ) {

		$themes = array();

		$active_themes = wp_get_themes();

		$current_theme = wp_get_theme();

		$status        = $request['status'];

		foreach ( $active_themes as $theme_name => $theme ) {

			$theme_status = ( $this->is_same_theme( $theme, $current_theme ) ) ? 'active' : 'inactive';

			if ( is_array( $status ) && ! in_array( $theme_status, $status, true ) ) {

				continue;

			}

			$prepared = $this->prepare_item_for_response( $theme, $request );

			$themes[] = $this->prepare_response_for_collection( $prepared );

		}

		$response = rest_ensure_response( $themes );

		$response->header( 'X-WP-Total', count( $themes ) );

		$response->header( 'X-WP-TotalPages', 1 );

		return $response;

	}

	/**

	 * Prepares a single theme output for response.

	 *

	 * @since 5.0.0

	 * @since 5.9.0 Renamed `$theme` to `$item` to match parent class for PHP 8 named parameter support.

	 *

	 * @param WP_Theme        $item    Theme object.

	 * @param WP_REST_Request $request Request object.

	 * @return WP_REST_Response Response object.

	 */

	public function prepare_item_for_response( $item, $request ) {

		// Restores the more descriptive, specific name for use within this method.

		$data   = array();

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

			$data['stylesheet'] = $theme->get_stylesheet();

		}

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

			/**

			 * Use the get_template() method, not the 'Template' header, for finding the template.

			 * The 'Template' header is only good for what was written in the style.css, while

			 * get_template() takes into account where WordPress actually located the theme and

			 * whether it is actually valid.

			 */

			$data['template'] = $theme->get_template();

		}

		$plain_field_mappings = array(

			'requires_php' => 'RequiresPHP',

			'requires_wp'  => 'RequiresWP',

			'textdomain'   => 'TextDomain',

			'version'      => 'Version',

		);

		foreach ( $plain_field_mappings as $field => $header ) {

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

				$data[ $field ] = $theme->get( $header );

			}

		}

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

			// Using $theme->get_screenshot() with no args to get absolute URL.

			$data['screenshot'] = $theme->get_screenshot() ? $theme->get_screenshot() : '';

		}

		$rich_field_mappings = array(

			'author'      => 'Author',

			'author_uri'  => 'AuthorURI',

			'description' => 'Description',

			'name'        => 'Name',

			'tags'        => 'Tags',

			'theme_uri'   => 'ThemeURI',

		);

		foreach ( $rich_field_mappings as $field => $header ) {

			if ( rest_is_field_included( "{$field}.raw", $fields ) ) {

				$data[ $field ]['raw'] = $theme->display( $header, false, true );

			}

			if ( rest_is_field_included( "{$field}.rendered", $fields ) ) {

				$data[ $field ]['rendered'] = $theme->display( $header );

			}

		}

		$current_theme = wp_get_theme();

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

			$data['status'] = ( $this->is_same_theme( $theme, $current_theme ) ) ? 'active' : 'inactive';

		}

		if ( rest_is_field_included( 'theme_supports', $fields ) && $this->is_same_theme( $theme, $current_theme ) ) {

			foreach ( get_registered_theme_features() as $feature => $config ) {

				if ( ! is_array( $config['show_in_rest'] ) ) {

					continue;

				}

				$name = $config['show_in_rest']['name'];

				if ( ! rest_is_field_included( "theme_supports.{$name}", $fields ) ) {

					continue;

				}

				if ( ! current_theme_supports( $feature ) ) {

					$data['theme_supports'][ $name ] = $config['show_in_rest']['schema']['default'];

					continue;

				}

				$support = get_theme_support( $feature );

				if ( isset( $config['show_in_rest']['prepare_callback'] ) ) {

					$prepare = $config['show_in_rest']['prepare_callback'];

				} else {

					$prepare = array( $this, 'prepare_theme_support' );

				}

				$prepared = $prepare( $support, $config, $feature, $request );

				if ( is_wp_error( $prepared ) ) {

					continue;

				}

				$data['theme_supports'][ $name ] = $prepared;

			}

		}

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

		// Wrap the data in a response object.

		$response = rest_ensure_response( $data );

		}

		/**

		 * Filters theme data returned from the REST API.

		 *

		 * @since 5.0.0

		 *

		 * @param WP_REST_Response $response The response object.

		 * @param WP_Theme         $theme    Theme object used to create response.

		 * @param WP_REST_Request  $request  Request object.

		 */

		return apply_filters( 'rest_prepare_theme', $response, $theme, $request );

	}

	/**

	 * Prepares links for the request.

	 *

	 * @since 5.7.0

	 *

	 * @param WP_Theme $theme Theme data.

	 * @return array Links for the given block type.

	 */

	protected function prepare_links( $theme ) {

			'self'       => array(

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

			),

			'collection' => array(

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

			),

		);

	}

	/**

	 * Helper function to compare two themes.