pref lession

apps/course/views/lesson.py

@@ -58,10 +58,20 @@ class LessonDetailView(RetrieveAPIView):
             priority__lte=lesson.priority,
             id__lt=lesson.id
         ).order_by('-priority', '-id').first()
-
+        total_lessons = Lesson.objects.filter(course=lesson.course, is_active=True).count()
+        # Calculate the current lesson number in the course
+        current_lesson_number = Lesson.objects.filter(
+            course=lesson.course,
+            is_active=True,
+            priority__lte=lesson.priority
+        ).count()
+        
         # Serialize the current lesson
         lesson_data = self.get_serializer(lesson).data
-
+        # Add current lesson number and total lessons
+        lesson_data['current_lesson_number'] = current_lesson_number
+        lesson_data['total_lessons'] = total_lessons
+        
         # Add next and previous lesson ids
         lesson_data['next_lesson_id'] = next_lesson.id if next_lesson else None
         lesson_data['previous_lesson_id'] = previous_lesson.id if previous_lesson else None