Add comments.

biscuit/apps/alsijil/views.py

@@ -17,9 +17,11 @@ def lesson(request: HttpRequest, week: Optional[int] = None, period_id: Optional
     context = {}
 
     if week and period_id:
+        # Get a specific lesson period if provided in URL
         lesson_period = LessonPeriod.objects.get(pk=period_id)
         wanted_week = week
     else:
+        # Determine current lesson by current date and time
         lesson_period = current_lesson_periods().filter(
             lesson__teachers=request.user.person).first()
         wanted_week = current_week()
@@ -28,11 +30,13 @@ def lesson(request: HttpRequest, week: Optional[int] = None, period_id: Optional
     context['week'] = wanted_week
 
     if lesson_period:
+        # Create or get lesson documentation object; can be empty when first opening lesson
         lesson_documentation, created = LessonDocumentation.objects.get_or_create(lesson_period=lesson_period, week=wanted_week)
         lesson_documentation_form = LessonDocumentationForm(request.POST or None, instance=lesson_documentation)
 
         if request.method == 'POST':
             if request.POST.get('action', None) == 'lesson_documentation':
+                # Save the lesson documentation
                 if lesson_documentation_form.is_valid():
                     lesson_documentation_form.save()