Allow meta to be edited via REST API

assets/src/js/panel-body.js

@@ -22,16 +22,16 @@ const View = ( { setTarget, setType, target, type } ) => {
 					'To restore the original permalink, remove the link entered above.',
 					'external-permalinks-redux'
 				) }
+				onChange={ setTarget }
 				type="url"
 				value={ target }
-				onChange={ setTarget }
 			/>
 
 			<SelectControl
 				label={ __( 'Redirect Type:', 'external-permalinks-redux' ) }
-				options={ statusCodes }
-				selected={ type }
 				onChange={ setType }
+				options={ statusCodes }
+				value={ type }
 			/>
 		</>
 	);

inc/class-external-permalinks-redux-block-editor.php

@@ -42,6 +42,7 @@ class External_Permalinks_Redux_Block_Editor {
 	 */
 	protected function _setup() {
 		add_action( 'rest_api_init', array( $this, 'register_meta' ) );
+		add_filter( 'is_protected_meta', array( $this, 'allow_meta_updates' ), 10, 3 );
 		add_action( 'enqueue_block_editor_assets', array( $this, 'enqueue' ) );
 	}
 
@@ -93,6 +94,29 @@ class External_Permalinks_Redux_Block_Editor {
 		);
 	}
 
+	/**
+	 * Allow meta updates from REST API.
+	 *
+	 * @param bool   $protected Whether meta is protected or not.
+	 * @param string $meta_key  Meta key.
+	 * @param string $meta_type Meta key type.
+	 * @return bool
+	 */
+	public function allow_meta_updates( $protected, $meta_key, $meta_type ) {
+		if ( 'post' !== $meta_type ) {
+			return $protected;
+		}
+
+		if (
+			$meta_key === external_permalinks_redux::get_instance()->meta_key_target
+			|| $meta_key === external_permalinks_redux::get_instance()->meta_key_type
+		) {
+			return false;
+		}
+
+		return $protected;
+	}
+
 	/**
 	 * Enqueue block-editor script.
 	 *