Add Mediator Factory to avoid creating variables other than mediator in further adapter. The main purpose of the adapter is connecting dart (flutter app) and c++ (Fast Pair libraries).

PiperOrigin-RevId: 538604362

fastpair/keyed_service/BUILD

@@ -18,9 +18,11 @@ cc_library(
     name = "keyed_service",
     srcs = [
         "fast_pair_mediator.cc",
+        "fast_pair_mediator_factory.cc",
     ],
     hdrs = [
         "fast_pair_mediator.h",
+        "fast_pair_mediator_factory.h",
     ],
     compatible_with = ["//buildenv/target:non_prod"],
     visibility = [
@@ -43,6 +45,7 @@ cc_test(
     name = "fast_pair_mediator_test",
     size = "small",
     srcs = [
+        "fast_pair_mediator_factory_test.cc",
         "fast_pair_mediator_test.cc",
     ],
     shard_count = 16,

fastpair/keyed_service/fast_pair_mediator_factory.cc

@@ -0,0 +1,43 @@
+// Copyright 2023 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "fastpair/keyed_service/fast_pair_mediator_factory.h"
+
+#include <memory>
+
+#include "fastpair/internal/mediums/mediums.h"
+#include "fastpair/server_access/fast_pair_repository_impl.h"
+#include "fastpair/ui/fast_pair/fast_pair_notification_controller.h"
+#include "fastpair/ui/ui_broker_impl.h"
+#include "internal/platform/single_thread_executor.h"
+
+namespace nearby {
+namespace fastpair {
+
+MediatorFactory* MediatorFactory::GetInstance() {
+  static MediatorFactory* instance = new MediatorFactory();
+  return instance;
+}
+
+Mediator* MediatorFactory::CreateMediator() {
+  mediator_ = std::make_unique<Mediator>(
+      std::make_unique<Mediums>(), std::make_unique<UIBrokerImpl>(),
+      std::make_unique<FastPairNotificationController>(),
+      std::make_unique<FastPairRepositoryImpl>(),
+      std::make_unique<SingleThreadExecutor>());
+  return mediator_.get();
+}
+
+}  // namespace fastpair
+}  // namespace nearby

fastpair/keyed_service/fast_pair_mediator_factory.h

@@ -0,0 +1,39 @@
+// Copyright 2023 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#ifndef THIRD_PARTY_NEARBY_FASTPAIR_KEYED_SERVICE_FAST_PAIR_MEDIATOR_FACTORY_H_
+#define THIRD_PARTY_NEARBY_FASTPAIR_KEYED_SERVICE_FAST_PAIR_MEDIATOR_FACTORY_H_
+
+#include <memory>
+
+#include "fastpair/keyed_service/fast_pair_mediator.h"
+
+namespace nearby {
+namespace fastpair {
+
+class MediatorFactory {
+ public:
+  // Return a singleton instance of Mediator Factory
+  static MediatorFactory* GetInstance();
+
+  Mediator* CreateMediator();
+
+ private:
+  std::unique_ptr<Mediator> mediator_;
+};
+
+}  // namespace fastpair
+}  // namespace nearby
+
+#endif  // THIRD_PARTY_NEARBY_FASTPAIR_KEYED_SERVICE_FAST_PAIR_MEDIATOR_FACTORY_H_

fastpair/keyed_service/fast_pair_mediator_factory_test.cc

@@ -0,0 +1,37 @@
+// Copyright 2023 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "fastpair/keyed_service/fast_pair_mediator_factory.h"
+
+#include "gmock/gmock.h"
+#include "protobuf-matchers/protocol-buffer-matchers.h"
+#include "gtest/gtest.h"
+#include "fastpair/keyed_service/fast_pair_mediator.h"
+
+namespace nearby {
+namespace fastpair {
+namespace {
+
+TEST(MediatorFactoryTest, checkMediatorCreateWithFactory) {
+  MediatorFactory *factory_ = nullptr;
+  Mediator *mediator_ = nullptr;
+  factory_ = MediatorFactory::GetInstance();
+  EXPECT_THAT(factory_, testing::NotNull());
+  mediator_ = factory_->CreateMediator();
+  EXPECT_THAT(mediator_, testing::NotNull());
+}
+
+}  // namespace
+}  // namespace fastpair
+}  // namespace nearby