feat(fdc): Add GMP header

packages/firebase_data_connect/firebase_data_connect/example/android/app/src/main/AndroidManifest.xml

@@ -43,4 +43,4 @@
             <data android:mimeType="text/plain" />
         </intent>
     </queries>
-</manifest>
+</manifest>

packages/firebase_data_connect/firebase_data_connect/example/firebase.json

@@ -7,4 +7,4 @@
       "port": 9099
     }
   }
-}
+}

packages/firebase_data_connect/firebase_data_connect/lib/src/common/common_library.dart

@@ -30,7 +30,7 @@ class TransportOptions {
 /// Interface for transports connecting to the DataConnect backend.
 abstract class DataConnectTransport {
   /// Constructor.
-  DataConnectTransport(this.transportOptions, this.options);
+  DataConnectTransport(this.transportOptions, this.options, this.appId);
 
   /// Transport options.
   TransportOptions transportOptions;
@@ -44,17 +44,20 @@ abstract class DataConnectTransport {
   /// FirebaseAppCheck to use to get app check token.
   FirebaseAppCheck? appCheck;
 
+  /// Application ID
+  String appId;
+
   /// Invokes corresponding query endpoint.
   Future<Data> invokeQuery<Data, Variables>(
       String queryName,
       Deserializer<Data> deserializer,
-      Serializer<Variables>? serializer,
+      Serializer<Variables> serializer,
       Variables? vars);
 
   /// Invokes corresponding mutation endpoint.
   Future<Data> invokeMutation<Data, Variables>(
       String queryName,
       Deserializer<Data> deserializer,
-      Serializer<Variables>? serializer,
+      Serializer<Variables> serializer,
       Variables? vars);
 }

packages/firebase_data_connect/firebase_data_connect/lib/src/firebase_data_connect.dart

@@ -54,7 +54,8 @@ class FirebaseDataConnect extends FirebasePluginPlatform {
   void checkTransport() {
     transportOptions ??=
         TransportOptions('firebasedataconnect.googleapis.com', null, true);
-    transport = getTransport(transportOptions!, options, auth, appCheck);
+    transport = getTransport(
+        transportOptions!, options, app.options.appId, auth, appCheck);
   }
 
   /// Returns a [QueryRef] object.

packages/firebase_data_connect/firebase_data_connect/lib/src/network/grpc_transport.dart

@@ -7,7 +7,13 @@ part of firebase_data_connect_grpc;
 /// Transport used for Android/iOS. Uses a GRPC transport instead of REST.
 class GRPCTransport implements DataConnectTransport {
   /// GRPCTransport creates a new channel
-  GRPCTransport(this.transportOptions, this.options, this.auth, this.appCheck) {
+  GRPCTransport(
+    this.transportOptions,
+    this.options,
+    this.appId,
+    this.auth,
+    this.appCheck,
+  ) {
     bool isSecure =
         transportOptions.isSecure == null || transportOptions.isSecure == true;
     channel = ClientChannel(transportOptions.host,
@@ -46,6 +52,10 @@ class GRPCTransport implements DataConnectTransport {
   @override
   DataConnectOptions options;
 
+  /// Application ID
+  @override
+  String appId;
+
   Future<Map<String, String>> getMetadata() async {
     String? authToken;
     try {
@@ -70,6 +80,7 @@ class GRPCTransport implements DataConnectTransport {
     if (appCheckToken != null) {
       metadata['X-Firebase-AppCheck'] = appCheckToken;
     }
+    metadata['x-firebase-gmpid'] = appId;
     return metadata;
   }
 
@@ -134,6 +145,7 @@ class GRPCTransport implements DataConnectTransport {
 DataConnectTransport getTransport(
         TransportOptions transportOptions,
         DataConnectOptions options,
+        String appId,
         FirebaseAuth? auth,
         FirebaseAppCheck? appCheck) =>
-    GRPCTransport(transportOptions, options, auth, appCheck);
+    GRPCTransport(transportOptions, options, appId, auth, appCheck);

packages/firebase_data_connect/firebase_data_connect/lib/src/network/rest_transport.dart

@@ -7,7 +7,8 @@ part of firebase_data_connect_rest;
 /// RestTransport makes requests out to the REST endpoints of the configured backend.
 class RestTransport implements DataConnectTransport {
   /// Initializes necessary protocol and port.
-  RestTransport(this.transportOptions, this.options, this.auth, this.appCheck) {
+  RestTransport(this.transportOptions, this.options, this.appId, this.auth,
+      this.appCheck) {
     String protocol = 'http';
     if (transportOptions.isSecure == null ||
         transportOptions.isSecure == true) {
@@ -48,6 +49,10 @@ class RestTransport implements DataConnectTransport {
   @override
   DataConnectOptions options;
 
+  /// Firebase application ID.
+  @override
+  String appId;
+
   /// Invokes the current operation, whether its a query or mutation.
   Future<Data> invokeOperation<Data, Variables>(
       String queryName,
@@ -82,6 +87,7 @@ class RestTransport implements DataConnectTransport {
     if (appCheckToken != null) {
       headers['X-Firebase-AppCheck'] = appCheckToken;
     }
+    headers['x-firebase-gmpid'] = appId;
 
     Map<String, dynamic> body = {
       'name':
@@ -148,6 +154,7 @@ class RestTransport implements DataConnectTransport {
 DataConnectTransport getTransport(
         TransportOptions transportOptions,
         DataConnectOptions options,
+        String appId,
         FirebaseAuth? auth,
         FirebaseAppCheck? appCheck) =>
-    RestTransport(transportOptions, options, auth, appCheck);
+    RestTransport(transportOptions, options, appId, auth, appCheck);

packages/firebase_data_connect/firebase_data_connect/lib/src/network/transport_stub.dart

@@ -7,7 +7,13 @@ part of firebase_data_connect_transport;
 /// Default TransportStub to satisfy compilation of the library.
 class TransportStub implements DataConnectTransport {
   /// Constructor.
-  TransportStub(this.transportOptions, this.options, this.auth, this.appCheck);
+  TransportStub(
+    this.transportOptions,
+    this.options,
+    this.appId,
+    this.auth,
+    this.appCheck,
+  );
 
   /// FirebaseAuth
   @override
@@ -25,6 +31,9 @@ class TransportStub implements DataConnectTransport {
   @override
   TransportOptions transportOptions;
 
+  @override
+  String appId;
+
   /// Stub for invoking a mutation.
   @override
   Future<Data> invokeMutation<Data, Variables>(
@@ -49,8 +58,10 @@ class TransportStub implements DataConnectTransport {
 }
 
 DataConnectTransport getTransport(
-        TransportOptions transportOptions,
-        DataConnectOptions options,
-        FirebaseAuth? auth,
-        FirebaseAppCheck? appCheck) =>
-    TransportStub(transportOptions, options, auth, appCheck);
+  TransportOptions transportOptions,
+  DataConnectOptions options,
+  String appId,
+  FirebaseAuth? auth,
+  FirebaseAppCheck? appCheck,
+) =>
+    TransportStub(transportOptions, options, appId, auth, appCheck);

packages/firebase_data_connect/firebase_data_connect/test/src/common/common_library_test.dart

@@ -65,6 +65,7 @@ void main() {
       transport = TestDataConnectTransport(
         transportOptions,
         dataConnectOptions,
+        'testAppId',
         auth: mockFirebaseAuth,
         appCheck: mockFirebaseAppCheck,
       );
@@ -79,17 +80,17 @@ void main() {
     test('should handle invokeQuery with proper deserializer', () async {
       final queryName = 'testQuery';
       final deserializer = (json) => json;
-      final result =
-          await transport.invokeQuery(queryName, deserializer, null, null);
+      final result = await transport.invokeQuery(
+          queryName, deserializer, emptySerializer, null);
 
       expect(result, isNotNull);
     });
 
     test('should handle invokeMutation with proper deserializer', () async {
       final queryName = 'testMutation';
       final deserializer = (json) => json;
-      final result =
-          await transport.invokeMutation(queryName, deserializer, null, null);
+      final result = await transport.invokeMutation(
+          queryName, deserializer, emptySerializer, null);
 
       expect(result, isNotNull);
     });
@@ -98,10 +99,10 @@ void main() {
 
 // Test class extending DataConnectTransport for testing purposes
 class TestDataConnectTransport extends DataConnectTransport {
-  TestDataConnectTransport(
-      TransportOptions transportOptions, DataConnectOptions options,
+  TestDataConnectTransport(TransportOptions transportOptions,
+      DataConnectOptions options, String appId,
       {FirebaseAuth? auth, FirebaseAppCheck? appCheck})
-      : super(transportOptions, options) {
+      : super(transportOptions, options, appId) {
     this.auth = auth;
     this.appCheck = appCheck;
   }

packages/firebase_data_connect/firebase_data_connect/test/src/network/rest_transport_test.dart

@@ -40,6 +40,7 @@ void main() {
         'testConnector',
         'testService',
       ),
+      'testAppId',
       mockAuth,
       mockAppCheck,
     );
@@ -64,6 +65,7 @@ void main() {
           'testConnector',
           'testService',
         ),
+        'testAppId',
         mockAuth,
         mockAppCheck,
       );

packages/firebase_data_connect/firebase_data_connect/test/src/network/transport_stub_test.dart

@@ -36,6 +36,7 @@ void main() {
       final transportStub = TransportStub(
         mockTransportOptions,
         mockDataConnectOptions,
+        'mockAppId',
         mockAuth,
         mockAppCheck,
       );
@@ -50,6 +51,7 @@ void main() {
       final transportStub = TransportStub(
         mockTransportOptions,
         mockDataConnectOptions,
+        'mockAppId',
         mockAuth,
         mockAppCheck,
       );
@@ -69,6 +71,7 @@ void main() {
       final transportStub = TransportStub(
         mockTransportOptions,
         mockDataConnectOptions,
+        'mockAppId',
         mockAuth,
         mockAppCheck,
       );