Add an exercise datamodel

Author: naibaf-1

lib/exercise_datamodel.dart

@@ -0,0 +1,35 @@
+/// Copyright 2026 Fabian Roland (naibaf-1)
+
+/// 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
+
+/// http://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.
+library;
+
+// This defines which values an exercise has
+class ExerciseDatamodel {
+  final int id;
+  String name;
+  String description;
+  String task;
+  String solution;
+  int difficultyLevel;
+  String hint;
+
+  ExerciseDatamodel({
+    required this.id,
+    required this.name,
+    required this.description,
+    required this.task,
+    required this.solution,
+    required this.difficultyLevel,
+    this.hint = "No hint available.",
+  });
+}