feat: class/:id service en controller laag geimplementeerd (BEVAT NOG BUG)

backend/src/services/class.ts

@@ -0,0 +1,12 @@
+import { getClassRepository } from "../data/repositories";
+import { ClassDTO, mapToClassDTO } from "../interfaces/classes";
+
+export async function getClass(classId: string): Promise<ClassDTO | null> {
+    const classRepository = getClassRepository();
+    const cls = await classRepository.findById(classId);
+
+    if (!cls) return null;
+    else {
+        return mapToClassDTO(cls);
+    }
+}