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C:\xampp\htdocs\landing\wp-includes\rest-api\endpoints\class-wp-rest-themes-controller.php

<?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 {

    /**
     * Constructor.
     *
     * @since 5.0.0
     */
    public function __construct() {
        $this->namespace = 'wp/v2';
        $this->rest_base = 'themes';
    }

    /**
     * Registers the routes for the objects of the controller.
     *
     * @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' ),
            )
        );
    }

    /**
     * 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( '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_user_cannot_view',
            __( 'Sorry, you are not allowed to view themes.' ),
            array( 'status' => rest_authorization_required_code() )
        );
    }

    /**
     * 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 ) {
        // Retrieve the list of registered collection query parameters.
        $registered = $this->get_collection_params();
        $themes     = array();

        if ( isset( $registered['status'], $request['status'] ) && in_array( 'active', $request['status'], true ) ) {
            $active_theme = wp_get_theme();
            $active_theme = $this->prepare_item_for_response( $active_theme, $request );
            $themes[]     = $this->prepare_response_for_collection( $active_theme );
        }

        $response = rest_ensure_response( $themes );

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

        return $response;
    }

    /**
     * Prepares a single theme output for response.
     *
     * @since 5.0.0
     *
     * @param WP_Theme        $theme   Theme object.
     * @param WP_REST_Request $request Request object.
     * @return WP_REST_Response Response object.
     */
    public function prepare_item_for_response( $theme, $request ) {
        $data   = array();
        $fields = $this->get_fields_for_response( $request );

        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 );
            }
        }

        if ( rest_is_field_included( 'theme_supports', $fields ) ) {
            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 the theme support value for inclusion in the REST API response.
     *
     * @since 5.5.0
     *
     * @param mixed           $support The raw value from get_theme_support().
     * @param array           $args    The feature's registration args.
     * @param string          $feature The feature name.
     * @param WP_REST_Request $request The request object.
     * @return mixed The prepared support value.
     */
    protected function prepare_theme_support( $support, $args, $feature, $request ) {
        $schema = $args['show_in_rest']['schema'];

        if ( 'boolean' === $schema['type'] ) {
            return true;
        }

        if ( is_array( $support ) && ! $args['variadic'] ) {
            $support = $support[0];
        }

        return rest_sanitize_value_from_schema( $support, $schema );
    }

    /**
     * Retrieves the theme's schema, conforming to JSON Schema.
     *
     * @since 5.0.0
     *
     * @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'      => 'theme',
            'type'       => 'object',
            'properties' => array(
                'stylesheet'     => array(
                    'description' => __( 'The theme\'s stylesheet. This uniquely identifies the theme.' ),
                    'type'        => 'string',
                    'readonly'    => true,
                ),
                'template'       => array(
                    'description' => __( 'The theme\'s template. If this is a child theme, this refers to the parent theme, otherwise this is the same as the theme\'s stylesheet.' ),
                    'type'        => 'string',
                    'readonly'    => true,
                ),
                'author'         => array(
                    'description' => __( 'The theme author.' ),
                    'type'        => 'object',
                    'readonly'    => true,
                    'properties'  => array(
                        'raw'      => array(
                            'description' => __( 'The theme author\'s name, as found in the theme header.' ),
                            'type'        => 'string',
                        ),
                        'rendered' => array(
                            'description' => __( 'HTML for the theme author, transformed for display.' ),
                            'type'        => 'string',
                        ),
                    ),
                ),
                'author_uri'     => array(
                    'description' => __( 'The website of the theme author.' ),
                    'type'        => 'object',
                    'readonly'    => true,
                    'properties'  => array(
                        'raw'      => array(
                            'description' => __( 'The website of the theme author, as found in the theme header.' ),
                            'type'        => 'string',
                            'format'      => 'uri',
                        ),
                        'rendered' => array(
                            'description' => __( 'The website of the theme author, transformed for display.' ),
                            'type'        => 'string',
                            'format'      => 'uri',
                        ),
                    ),
                ),
                'description'    => array(
                    'description' => __( 'A description of the theme.' ),
                    'type'        => 'object',
                    'readonly'    => true,
                    'properties'  => array(
                        'raw'      => array(
                            'description' => __( 'The theme description, as found in the theme header.' ),
                            'type'        => 'string',
                        ),
                        'rendered' => array(
                            'description' => __( 'The theme description, transformed for display.' ),
                            'type'        => 'string',
                        ),
                    ),
                ),
                'name'           => array(
                    'description' => __( 'The name of the theme.' ),
                    'type'        => 'object',
                    'readonly'    => true,
                    'properties'  => array(
                        'raw'      => array(
                            'description' => __( 'The theme name, as found in the theme header.' ),
                            'type'        => 'string',
                        ),
                        'rendered' => array(
                            'description' => __( 'The theme name, transformed for display.' ),
                            'type'        => 'string',
                        ),
                    ),
                ),
                'requires_php'   => array(
                    'description' => __( 'The minimum PHP version required for the theme to work.' ),
                    'type'        => 'string',
                    'readonly'    => true,
                ),
                'requires_wp'    => array(
                    'description' => __( 'The minimum WordPress version required for the theme to work.' ),
                    'type'        => 'string',
                    'readonly'    => true,
                ),
                'screenshot'     => array(
                    'description' => __( 'The theme\'s screenshot URL.' ),
                    'type'        => 'string',
                    'format'      => 'uri',
                    'readonly'    => true,
                ),
                'tags'           => array(
                    'description' => __( 'Tags indicating styles and features of the theme.' ),
                    'type'        => 'object',
                    'readonly'    => true,
                    'properties'  => array(
                        'raw'      => array(
                            'description' => __( 'The theme tags, as found in the theme header.' ),
                            'type'        => 'array',
                            'items'       => array(
                                'type' => 'string',
                            ),
                        ),
                        'rendered' => array(
                            'description' => __( 'The theme tags, transformed for display.' ),
                            'type'        => 'string',
                        ),
                    ),
                ),
                'textdomain'     => array(
                    'description' => __( 'The theme\'s text domain.' ),
                    'type'        => 'string',
                    'readonly'    => true,
                ),
                'theme_supports' => array(
                    'description' => __( 'Features supported by this theme.' ),
                    'type'        => 'object',
                    'readonly'    => true,
                    'properties'  => array(),
                ),
                'theme_uri'      => array(
                    'description' => __( 'The URI of the theme\'s webpage.' ),
                    'type'        => 'object',
                    'readonly'    => true,
                    'properties'  => array(
                        'raw'      => array(
                            'description' => __( 'The URI of the theme\'s webpage, as found in the theme header.' ),
                            'type'        => 'string',
                            'format'      => 'uri',
                        ),
                        'rendered' => array(
                            'description' => __( 'The URI of the theme\'s webpage, transformed for display.' ),
                            'type'        => 'string',
                            'format'      => 'uri',
                        ),
                    ),
                ),
                'version'        => array(
                    'description' => __( 'The theme\'s current version.' ),
                    'type'        => 'string',
                    'readonly'    => true,
                ),
            ),
        );

        foreach ( get_registered_theme_features() as $feature => $config ) {
            if ( ! is_array( $config['show_in_rest'] ) ) {
                continue;
            }

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

            $schema['properties']['theme_supports']['properties'][ $name ] = $config['show_in_rest']['schema'];
        }

        $this->schema = $schema;

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

    /**
     * Retrieves the search params for the themes collection.
     *
     * @since 5.0.0
     *
     * @return array Collection parameters.
     */
    public function get_collection_params() {
        $query_params = parent::get_collection_params();

        $query_params['status'] = array(
            'description'       => __( 'Limit result set to themes assigned one or more statuses.' ),
            'type'              => 'array',
            'items'             => array(
                'enum' => array( 'active' ),
                'type' => 'string',
            ),
            'required'          => true,
            'sanitize_callback' => array( $this, 'sanitize_theme_status' ),
        );

        /**
         * Filters collection parameters for the themes controller.
         *
         * @since 5.0.0
         *
         * @param array $query_params JSON Schema-formatted collection parameters.
         */
        return apply_filters( 'rest_themes_collection_params', $query_params );
    }

    /**
     * Sanitizes and validates the list of theme status.
     *
     * @since 5.0.0
     *
     * @param string|array    $statuses  One or more theme statuses.
     * @param WP_REST_Request $request   Full details about the request.
     * @param string          $parameter Additional parameter to pass to validation.
     * @return array|WP_Error A list of valid statuses, otherwise WP_Error object.
     */
    public function sanitize_theme_status( $statuses, $request, $parameter ) {
        $statuses = wp_parse_slug_list( $statuses );

        foreach ( $statuses as $status ) {
            $result = rest_validate_request_arg( $status, $request, $parameter );

            if ( is_wp_error( $result ) ) {
                return $result;
            }
        }

        return $statuses;
    }
}
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