fix: import errors van gabe gefixt, teacher en student abstractie weggedaan

backend/src/interfaces/teacher.ts

@@ -0,0 +1,33 @@
+import { Teacher } from '../entities/users/teacher.entity.js';
+
+export interface TeacherDTO {
+    id: string;
+    username: string;
+    firstName: string;
+    lastName: string;
+    endpoints?: {
+        classes: string;
+        questions: string;
+        invitations: string;
+        groups: string;
+    };
+}
+
+export function mapToTeacherDTO(teacher: Teacher): TeacherDTO {
+    return {
+        id: teacher.username,
+        username: teacher.username,
+        firstName: teacher.firstName,
+        lastName: teacher.lastName,
+    };
+}
+
+export function mapToTeacher(TeacherData: TeacherDTO): Teacher {
+    const teacher = new Teacher(
+        TeacherData.username,
+        TeacherData.firstName,
+        TeacherData.lastName,
+    );
+
+    return teacher;
+}