Return settings prop as object in the REST API

src/Integration/WPCOMProxy.php

@@ -193,7 +193,7 @@ function ( $response, $handler, $request ) {
 					$response->set_data( array_values( $data ) );
 				}
 
-				$response->set_data( $this->prepare_data( $response->get_data() ) );
+				$response->set_data( $this->prepare_data( $response->get_data(), $request ) );
 				return $response;
 			},
 			10,
@@ -204,17 +204,18 @@ function ( $response, $handler, $request ) {
 	/**
 	 * Prepares the data converting the empty arrays in objects for consistency.
 	 *
-	 * @param array $data The response data to parse
+	 * @param array           $data The response data to parse
+	 * @param WP_REST_Request $request The request object.
 	 * @return mixed
 	 */
-	public function prepare_data( $data ) {
+	public function prepare_data( $data, $request ) {
 		if ( ! is_array( $data ) ) {
 			return $data;
 		}
 
-		foreach ( array_keys( $data ) as $key ) {
-			if ( is_array( $data[ $key ] ) && empty( $data[ $key ] ) ) {
-				$data[ $key ] = (object) $data[ $key ];
+		foreach ( $data as $key => $value ) {
+			if ( preg_match( '/^\/wc\/v3\/shipping\/zones\/\d+\/methods/', $request->get_route() ) && isset( $value['settings'] ) && empty( $value['settings'] ) ) {
+				$data[ $key ]['settings'] = (object) $value['settings'];
 			}
 		}
 

tests/Unit/Integration/WPCOMProxyTest.php

@@ -14,6 +14,7 @@
 use Automattic\WooCommerce\GoogleListingsAndAds\Vendor\Psr\Container\ContainerInterface;
 use WC_Meta_Data;
 use WP_REST_Response;
+use WP_REST_Request;
 
 
 /**
@@ -458,13 +459,15 @@ public function test_get_settings_with_gla_syncable_param() {
 		$this->assertArrayHasKey( 'gla_shipping_times', $response_mapped );
 	}
 
-	public function test_get_empty_data_as_object() {
+	public function test_get_empty_settings_for_shipping_zone_methods_as_object() {
+		$request = new WP_REST_Request( 'GET', '/wc/v3/shipping/zones/4/methods' );
+
 		// dummy data
 		$data = [
-			'foo'  => 'bar',
-			'var'  => [],
-			'baz'  => null,
-			'bool' => false,
+			[
+				'id'       => '1',
+				'settings' => [],
+			],
 		];
 
 		$proxy = new WPCOMProxy(
@@ -474,12 +477,25 @@ public function test_get_empty_data_as_object() {
 
 		$this->assertEquals(
 			[
-				'foo'  => 'bar',
-				'var'  => (object) [],
-				'baz'  => null,
-				'bool' => false,
+				[
+					'id'       => '1',
+					'settings' => (object) [],
+				],
+			],
+			$proxy->prepare_data( $data, $request )
+		);
+
+		// If the request is not for shipping zone methods, the data should not be modified.
+		$request = new WP_REST_Request( 'GET', '/wc/v3/products' );
+
+		$this->assertEquals(
+			[
+				[
+					'id'       => '1',
+					'settings' => [],
+				],
 			],
-			$proxy->prepare_data( $data )
+			$proxy->prepare_data( $data, $request )
 		);
 	}
 }