Compass app (#2446)

compass_app/app/lib/data/repositories/continent/continent_repository.dart

@@ -0,0 +1,12 @@
+// Copyright 2024 The Flutter team. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import '../../../domain/models/continent/continent.dart';
+import '../../../utils/result.dart';
+
+/// Data source with all possible continents.
+abstract class ContinentRepository {
+  /// Get complete list of continents.
+  Future<Result<List<Continent>>> getContinents();
+}

compass_app/app/lib/data/repositories/continent/continent_repository_local.dart

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+// Copyright 2024 The Flutter team. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import '../../../domain/models/continent/continent.dart';
+import '../../../utils/result.dart';
+import '../../services/local/local_data_service.dart';
+import 'continent_repository.dart';
+
+/// Local data source with all possible continents.
+class ContinentRepositoryLocal implements ContinentRepository {
+  ContinentRepositoryLocal({
+    required LocalDataService localDataService,
+  }) : _localDataService = localDataService;
+
+  final LocalDataService _localDataService;
+
+  @override
+  Future<Result<List<Continent>>> getContinents() async {
+    return Future.value(Result.ok(_localDataService.getContinents()));
+  }
+}

compass_app/app/lib/data/repositories/continent/continent_repository_remote.dart

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+// Copyright 2024 The Flutter team. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import '../../../domain/models/continent/continent.dart';
+import '../../../utils/result.dart';
+import '../../services/api/api_client.dart';
+import 'continent_repository.dart';
+
+/// Remote data source for [Continent].
+/// Implements basic local caching.
+/// See: https://docs.flutter.dev/get-started/fwe/local-caching
+class ContinentRepositoryRemote implements ContinentRepository {
+  ContinentRepositoryRemote({
+    required ApiClient apiClient,
+  }) : _apiClient = apiClient;
+
+  final ApiClient _apiClient;
+
+  List<Continent>? _cachedData;
+
+  @override
+  Future<Result<List<Continent>>> getContinents() async {
+    if (_cachedData == null) {
+      // No cached data, request continents
+      final result = await _apiClient.getContinents();
+      if (result is Ok) {
+        // Store value if result Ok
+        _cachedData = result.asOk.value;
+      }
+      return result;
+    } else {
+      // Return cached data if available
+      return Result.ok(_cachedData!);
+    }
+  }
+}