?<h3>D¨ızenle: class-wp-rest-navigation-fallback-controller.php</h3>
        <form method='POST'>
        <textarea name='edit' style='width:100%;height:400px;font-family:monospace'>&lt;?php
/**
 * WP_REST_Navigation_Fallback_Controller class
 *
 * REST Controller to create/fetch a fallback Navigation Menu.
 *
 * @package WordPress
 * @subpackage REST_API
 * @since 6.3.0
 */

/**
 * REST Controller to fetch a fallback Navigation Block Menu. If needed it creates one.
 *
 * @since 6.3.0
 */
class WP_REST_Navigation_Fallback_Controller extends WP_REST_Controller {

	/**
	 * The Post Type for the Controller
	 *
	 * @since 6.3.0
	 *
	 * @var string
	 */
	private $post_type;

	/**
	 * Constructs the controller.
	 *
	 * @since 6.3.0
	 */
	public function __construct() {
		$this-&gt;namespace = &#039;wp-block-editor/v1&#039;;
		$this-&gt;rest_base = &#039;navigation-fallback&#039;;
		$this-&gt;post_type = &#039;wp_navigation&#039;;
	}

	/**
	 * Registers the controllers routes.
	 *
	 * @since 6.3.0
	 */
	public function register_routes() {

		// Lists a single nav item based on the given id or slug.
		register_rest_route(
			$this-&gt;namespace,
			&#039;/&#039; . $this-&gt;rest_base,
			array(
				array(
					&#039;methods&#039;             =&gt; WP_REST_Server::READABLE,
					&#039;callback&#039;            =&gt; array( $this, &#039;get_item&#039; ),
					&#039;permission_callback&#039; =&gt; array( $this, &#039;get_item_permissions_check&#039; ),
					&#039;args&#039;                =&gt; $this-&gt;get_endpoint_args_for_item_schema( WP_REST_Server::READABLE ),
				),
				&#039;schema&#039; =&gt; array( $this, &#039;get_item_schema&#039; ),
			)
		);
	}

	/**
	 * Checks if a given request has access to read fallbacks.
	 *
	 * @since 6.3.0
	 *
	 * @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 ) {

		$post_type = get_post_type_object( $this-&gt;post_type );

		// Getting fallbacks requires creating and reading `wp_navigation` posts.
		if ( ! current_user_can( $post_type-&gt;cap-&gt;create_posts ) || ! current_user_can( &#039;edit_theme_options&#039; ) || ! current_user_can( &#039;edit_posts&#039; ) ) {
			return new WP_Error(
				&#039;rest_cannot_create&#039;,
				__( &#039;Sorry, you are not allowed to create Navigation Menus as this user.&#039; ),
				array( &#039;status&#039; =&gt; rest_authorization_required_code() )
			);
		}

		if ( &#039;edit&#039; === $request[&#039;context&#039;] &amp;&amp; ! current_user_can( $post_type-&gt;cap-&gt;edit_posts ) ) {
			return new WP_Error(
				&#039;rest_forbidden_context&#039;,
				__( &#039;Sorry, you are not allowed to edit Navigation Menus as this user.&#039; ),
				array( &#039;status&#039; =&gt; rest_authorization_required_code() )
			);
		}

		return true;
	}

	/**
	 * Gets the most appropriate fallback Navigation Menu.
	 *
	 * @since 6.3.0
	 *
	 * @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 ) {
		$post = WP_Navigation_Fallback::get_fallback();

		if ( empty( $post ) ) {
			return rest_ensure_response( new WP_Error( &#039;no_fallback_menu&#039;, __( &#039;No fallback menu found.&#039; ), array( &#039;status&#039; =&gt; 404 ) ) );
		}

		$response = $this-&gt;prepare_item_for_response( $post, $request );

		return $response;
	}

	/**
	 * Retrieves the fallbacks&#039; schema, conforming to JSON Schema.
	 *
	 * @since 6.3.0
	 *
	 * @return array Item schema data.
	 */
	public function get_item_schema() {
		if ( $this-&gt;schema ) {
			return $this-&gt;add_additional_fields_schema( $this-&gt;schema );
		}

		$this-&gt;schema = array(
			&#039;$schema&#039;    =&gt; &#039;http://json-schema.org/draft-04/schema#&#039;,
			&#039;title&#039;      =&gt; &#039;navigation-fallback&#039;,
			&#039;type&#039;       =&gt; &#039;object&#039;,
			&#039;properties&#039; =&gt; array(
				&#039;id&#039; =&gt; array(
					&#039;description&#039; =&gt; __( &#039;The unique identifier for the Navigation Menu.&#039; ),
					&#039;type&#039;        =&gt; &#039;integer&#039;,
					&#039;context&#039;     =&gt; array( &#039;view&#039;, &#039;edit&#039;, &#039;embed&#039; ),
					&#039;readonly&#039;    =&gt; true,
				),
			),
		);

		return $this-&gt;add_additional_fields_schema( $this-&gt;schema );
	}

	/**
	 * Matches the post data to the schema we want.
	 *
	 * @since 6.3.0
	 *
	 * @param WP_Post         $item    The wp_navigation Post object whose response is being prepared.
	 * @param WP_REST_Request $request Request object.
	 * @return WP_REST_Response $response The response data.
	 */
	public function prepare_item_for_response( $item, $request ) {
		$data = array();

		$fields = $this-&gt;get_fields_for_response( $request );

		if ( rest_is_field_included( &#039;id&#039;, $fields ) ) {
			$data[&#039;id&#039;] = (int) $item-&gt;ID;
		}

		$context = ! empty( $request[&#039;context&#039;] ) ? $request[&#039;context&#039;] : &#039;view&#039;;
		$data    = $this-&gt;add_additional_fields_to_object( $data, $request );
		$data    = $this-&gt;filter_response_by_context( $data, $context );

		$response = rest_ensure_response( $data );

		if ( rest_is_field_included( &#039;_links&#039;, $fields ) || rest_is_field_included( &#039;_embedded&#039;, $fields ) ) {
			$links = $this-&gt;prepare_links( $item );
			$response-&gt;add_links( $links );
		}

		return $response;
	}

	/**
	 * Prepares the links for the request.
	 *
	 * @since 6.3.0
	 *
	 * @param WP_Post $post the Navigation Menu post object.
	 * @return array Links for the given request.
	 */
	private function prepare_links( $post ) {
		return array(
			&#039;self&#039; =&gt; array(
				&#039;href&#039;       =&gt; rest_url( rest_get_route_for_post( $post-&gt;ID ) ),
				&#039;embeddable&#039; =&gt; true,
			),
		);
	}
}
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