Add Fast Pair Preferences.

PiperOrigin-RevId: 538597935

fastpair/common/BUILD

@@ -7,6 +7,7 @@ cc_library(
         "battery_notification.cc",
         "fast_pair_device.cc",
         "fast_pair_http_result.cc",
+        "fast_pair_prefs.cc",
         "pair_failure.cc",
         "protocol.cc",
     ],
@@ -17,6 +18,7 @@ cc_library(
         "constant.h",
         "fast_pair_device.h",
         "fast_pair_http_result.h",
+        "fast_pair_prefs.h",
         "non_discoverable_advertisement.h",
         "pair_failure.h",
         "protocol.h",
@@ -27,6 +29,8 @@ cc_library(
     deps = [
         "//internal/crypto",
         "//internal/platform:logging",
+        "//internal/preferences",
+        "@com_google_absl//absl/base:core_headers",
         "@com_google_absl//absl/container:flat_hash_map",
         "@com_google_absl//absl/status",
         "@com_google_absl//absl/strings",
@@ -94,3 +98,18 @@ cc_test(
         "@com_google_googletest//:gtest_main",
     ],
 )
+
+cc_test(
+    name = "fast_pair_prefs_test",
+    size = "small",
+    srcs = [
+        "fast_pair_prefs_test.cc",
+    ],
+    shard_count = 16,
+    deps = [
+        ":common",
+        "//internal/platform/implementation/g3",  # build_cleaner: keep
+        "@com_github_protobuf_matchers//protobuf-matchers",
+        "@com_google_googletest//:gtest_main",
+    ],
+)

fastpair/common/fast_pair_prefs.cc

@@ -0,0 +1,33 @@
+// 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/common/fast_pair_prefs.h"
+
+namespace nearby {
+namespace fastpair {
+namespace prefs {
+namespace {
+using json = ::nlohmann::json;
+}
+
+const char kNearbyFastPairUsersName[] = "nearby_fastpair.users";
+
+void RegisterNearbyFastPairPrefs(
+    preferences::PreferencesManager* preferences_manager) {
+  preferences_manager->Set(kNearbyFastPairUsersName, json::object());
+}
+
+}  // namespace prefs
+}  // namespace fastpair
+}  // namespace nearby

fastpair/common/fast_pair_prefs.h

@@ -0,0 +1,34 @@
+// 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_COMMON_FASTPAIR_PREFS_H_
+#define THIRD_PARTY_NEARBY_FASTPAIR_COMMON_FASTPAIR_PREFS_H_
+
+#include "absl/base/attributes.h"
+#include "internal/preferences/preferences_manager.h"
+
+namespace nearby {
+namespace fastpair {
+namespace prefs {
+
+ABSL_CONST_INIT extern const char kNearbyFastPairUsersName[];
+
+void RegisterNearbyFastPairPrefs(
+    preferences::PreferencesManager* preferences_manager);
+
+}  // namespace prefs
+}  // namespace fastpair
+}  // namespace nearby
+
+#endif  // THIRD_PARTY_NEARBY_FASTPAIR_COMMON_FASTPAIR_PREFS_H_

fastpair/common/fast_pair_prefs_test.cc

@@ -0,0 +1,49 @@
+// 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/common/fast_pair_prefs.h"
+
+#include <memory>
+#include <string>
+
+#include "gtest/gtest.h"
+
+namespace nearby {
+namespace fastpair {
+namespace prefs {
+namespace {
+
+using json = ::nlohmann::json;
+
+constexpr char kPreferencesFilePath[] = "Google/Nearby/Preferences";
+
+TEST(FastPairPreference, RegisterNearbyFastPairPrefs) {
+  auto preferences_manager =
+      std::make_unique<preferences::PreferencesManager>(kPreferencesFilePath);
+  RegisterNearbyFastPairPrefs(preferences_manager.get());
+  EXPECT_TRUE(
+      preferences_manager->Get(kNearbyFastPairUsersName, json()).empty());
+
+  json value = {{"current_user", "abc@gmail.com"}};
+  preferences_manager->Set(kNearbyFastPairUsersName, value);
+  auto result = preferences_manager->Get(kNearbyFastPairUsersName, json());
+  ASSERT_FALSE(result.empty());
+  auto val = result["current_user"];
+  EXPECT_EQ(val.get<std::string>(), "abc@gmail.com");
+}
+
+}  // namespace
+}  // namespace prefs
+}  // namespace fastpair
+}  // namespace nearby