Frontend first draft

frontend/pshared/lib/service/template.dart

@@ -0,0 +1,66 @@
+import 'package:logging/logging.dart';
+
+import 'package:pshared/service/authorization/service.dart';
+
+
+class BasicService<T> {
+  final String _objectType;
+  final Logger _logger;
+  final List<T> Function(Map<String, dynamic> json) fromJson;
+
+  Logger get logger => _logger;
+
+  BasicService({
+    required String objectType,
+    required this.fromJson,
+  }) : _objectType = objectType, _logger = Logger('service.$objectType');
+
+  Future<List<T>> list(String organizationRef, String parentRef) async {
+    _logger.fine('Loading all objects');
+    return _getObjects(
+      AuthorizationService.getGETResponse(_objectType, '/list/$organizationRef/$parentRef'),
+    );
+  }
+
+  Future<T> get(String objectRef) async {
+    _logger.fine('Loading object $objectRef');
+    final objects = await _getObjects(
+      AuthorizationService.getGETResponse(_objectType, '/$objectRef'),
+    );
+    return objects.first;
+  }
+
+  Future<List<T>> create(String organizationRef, Map<String, dynamic> request) async {
+    _logger.fine('Creating new object...');
+    return _getObjects(
+      AuthorizationService.getPOSTResponse(_objectType, '/$organizationRef', request),
+    );
+  }
+
+  Future<List<T>> update(Map<String, dynamic> request) async {
+    _logger.fine('Patching object...');
+    return _getObjects(
+      AuthorizationService.getPUTResponse(_objectType, '/', request,
+      ),
+    );
+  }
+
+  Future<List<T>> delete(String objecRef) async {
+    _logger.fine('Deleting object $objecRef');
+    return _getObjects(
+      AuthorizationService.getDELETEResponse(_objectType, '/$objecRef', {}),
+    );
+  }
+
+  Future<List<T>> _getObjects(Future<Map<String, dynamic>> future) async {
+    try {
+      final responseJson = await future;
+      final objects = fromJson(responseJson);
+      _logger.fine('Fetched ${objects.length} object(s)');
+      return objects;
+    } catch (e, stackTrace) {
+      _logger.severe('Failed to fetch objects', e, stackTrace);
+      rethrow;
+    }
+  }
+}