centralized student permission in one function

cntmanage/flightslot/custom/student_permissions.py

@@ -0,0 +1,17 @@
+
+from django.http import HttpRequest
+from ..models.students import Student
+from ..models.weekpref import WeekPreference
+
+from datetime import date
+
+# allow add, modify, delete depending on a set of requirements
+def has_edit_permission(request: HttpRequest, obj: WeekPreference | None = None) -> bool:
+    if hasattr(request.user, 'student'):
+        student: Student = request.user.student
+        if not student.active:
+            return False
+        current_week: int = date.today().isocalendar().week
+        if obj and current_week > obj.week or not student.active:
+            return False
+    return True