Setting up basic API Structure

ac_web/lib/Api/Dtos/ReportDto.dart

@@ -0,0 +1,45 @@
+import 'package:ac_web/Api/JsonReader.dart';
+
+/// Dart counterpart of the backend `ReportDto` returned by `GET /reports`.
+class ReportDto {
+  const ReportDto({
+    required this.id,
+    required this.author,
+    required this.timestamp,
+    required this.type,
+    required this.text,
+  });
+
+  final String id;
+  final String author;
+  final DateTime timestamp;
+
+  /// Free form report type. The backend sends this as a plain string, so it is
+  /// intentionally not modelled as an enum here.
+  final String type;
+
+  final String text;
+
+  factory ReportDto.fromJson(Map<String, dynamic> json) {
+    return ReportDto(
+      id: JsonReader.requireString(json, 'Id'),
+      author: JsonReader.requireString(json, 'Author'),
+      timestamp: JsonReader.requireDateTime(json, 'Timestamp'),
+      type: JsonReader.optionalString(json, 'Type') ?? '',
+      text: JsonReader.optionalString(json, 'Text') ?? '',
+    );
+  }
+
+  Map<String, dynamic> toJson() {
+    return <String, dynamic>{
+      'Id': id,
+      'Author': author,
+      'Timestamp': timestamp.toIso8601String(),
+      'Type': type,
+      'Text': text,
+    };
+  }
+
+  @override
+  String toString() => 'ReportDto(id: $id, author: $author, type: $type)';
+}