feat(lms): add deadlines and manual assignment closing logic

lmsege/lms/views.py

@@ -44,10 +44,12 @@ def dashboard(request):
     submissions = Submission.objects.filter(student=request.user)
     submitted_assignment_ids = submissions.values_list('assignment_id', flat=True)
 
+    from django.utils import timezone
     return render(request, 'lms/dashboard.html', {
         'assignments': assignments,
         'submitted_assignment_ids': submitted_assignment_ids,
-        'submissions': {sub.assignment_id: sub for sub in submissions}
+        'submissions': {sub.assignment_id: sub for sub in submissions},
+        'now': timezone.now()
     })
 
 @login_required
@@ -58,6 +60,13 @@ def assignment_detail(request, pk):
     
     # Try to get existing submission
     submission = Submission.objects.filter(assignment=assignment, student=request.user).first()
+    
+    from django.utils import timezone
+    can_submit = True
+    if assignment.is_closed:
+        can_submit = False
+    if assignment.deadline and timezone.now() > assignment.deadline:
+        can_submit = False
 
     if submission:
         if request.method == 'POST':
@@ -65,7 +74,9 @@ def assignment_detail(request, pk):
             return redirect('lms:dashboard')
         form = None
     else:
-        if request.method == 'POST':
+        if not can_submit:
+            form = None
+        elif request.method == 'POST':
             form = AnswersForm(request.POST, request.FILES, questions=questions)
             if form.is_valid():
                 submission = Submission.objects.create(assignment=assignment, student=request.user)
@@ -153,4 +164,5 @@ def assignment_detail(request, pk):
         'submission': submission,
         'questions': questions,
         'question_fields': question_fields,
+        'can_submit': can_submit,
     })