rebase from live enviornment

wp/plugins/woocommerce/includes/rest-api/Controllers/Version3/class-wc-rest-coupons-controller.php

@@ -0,0 +1,50 @@
+<?php
+/**
+ * REST API Coupons controller
+ *
+ * Handles requests to the /coupons endpoint.
+ *
+ * @package WooCommerce\RestApi
+ * @since   2.6.0
+ */
+
+defined( 'ABSPATH' ) || exit;
+
+/**
+ * REST API Coupons controller class.
+ *
+ * @package WooCommerce\RestApi
+ * @extends WC_REST_Coupons_V2_Controller
+ */
+class WC_REST_Coupons_Controller extends WC_REST_Coupons_V2_Controller {
+
+	/**
+	 * Endpoint namespace.
+	 *
+	 * @var string
+	 */
+	protected $namespace = 'wc/v3';
+
+	/**
+	 * Prepare objects query.
+	 *
+	 * @param  WP_REST_Request $request Full details about the request.
+	 * @return array
+	 */
+	protected function prepare_objects_query( $request ) {
+		$args = parent::prepare_objects_query( $request );
+
+		// Set post_status.
+		$args['post_status'] = $request['status'];
+
+		if ( ! empty( $request['code'] ) ) {
+			$id               = wc_get_coupon_id_by_code( $request['code'] );
+			$args['post__in'] = array( $id );
+		}
+
+		// Get only ids.
+		$args['fields'] = 'ids';
+
+		return $args;
+	}
+}