finished backend upgrades to allow multiple courses

app/seed_db.py

@@ -0,0 +1,26 @@
+# Assuming db and models (Course) are initialized/imported
+from .models import db, Course
+
+def seed_courses():
+    course_data = [
+            {'id': 1, 'folder': 'grnvs25', 'name': 'GRNVS Tutorium SS 25'},
+            {'id': 2, 'folder': 'itsec2526', 'name': 'IT-Sec Tutorium WS 25/26'},
+    ]
+
+    for data in course_data:
+        # Check if the course already exists by ID
+        existing_course = db.session.get(Course, data['id'])
+        
+        if existing_course is None:
+            # Create a new Course object if it doesn't exist
+            new_course = Course(name=data['name'], folder=data['folder'])
+            # Since you're specifying the ID, you need to set it manually 
+            # if it's not an autoincrement sequence (SQLite handles this fine)
+            new_course.id = data['id'] 
+            db.session.add(new_course)
+        
+        # If it exists, you might want to update the name:
+        elif existing_course.name != data['name']:
+             existing_course.name = data['name']
+
+    db.session.commit()