Registers 'prefix', 'suffix' and 'term' string fields for the 'CorePo…

…stTerms' block.

includes/Blocks/CorePostTerms.php

@@ -15,15 +15,51 @@
  * Class CorePostTerms.
  */
 class CorePostTerms extends Block {
+	/**
+	 * String fields for the block.
+	 */
+	public const STRING_FIELDS = [ 'prefix', 'suffix', 'term' ];
+
 	/**
 	 * {@inheritDoc}
 	 */
 	public function __construct( WP_Block_Type $block, Registry $block_registry ) {
 		parent::__construct( $block, $block_registry );
 
+		foreach ( self::STRING_FIELDS as $field ) {
+			$this->register_string_field( $field );
+		}
+
 		$this->register_list_of_terms_field();
 	}
 
+	/**
+	 * Registers a string field for the block.
+	 *
+	 * @param string $name The name of the field.
+	 *
+	 * @return void
+	 * @throws \Exception
+	 */
+	protected function register_string_field( $name ) {
+		register_graphql_field(
+			$this->type_name,
+			$name,
+			[
+				'type'        => 'String',
+				'description' => sprintf(
+					// translators: %1$s is the field name, %2$s is the block type name.
+					__( '%1$s of the "%2$s" Block Type', 'wp-graphql-content-blocks' ),
+					ucfirst( $name ),
+					$this->type_name
+				),
+				'resolve'     => static function ( $block ) use ( $name ) {
+					return isset($block['attrs'][$name]) ? (string) $block['attrs'][$name] : null;
+				},
+			]
+		);
+	}
+
 	/**
 	 * Registers a list of terms field for the block.
 	 *