course lessons and chapters reorder logic implemented

apps/course/views/admin.py

@@ -2,6 +2,8 @@ from django.db.models import Q
 from rest_framework import viewsets
 from rest_framework.permissions import IsAuthenticated, IsAdminUser
 from rest_framework.authentication import TokenAuthentication
+from rest_framework.decorators import action
+from rest_framework.response import Response
 from apps.course.models import (
     Course,
     CourseCategory,
@@ -89,6 +91,23 @@ class AdminChapterViewSet(viewsets.ModelViewSet):
             queryset = queryset.filter(course_id=course_id)
         return queryset.order_by('priority', 'id')
 
+    @action(detail=False, methods=['post'])
+    def reorder(self, request):
+        """
+        Reorders chapters in bulk.
+        Format: {"chapter_ids": [id1, id2, ...]}
+        """
+        chapter_ids = request.data.get('chapter_ids', [])
+        if not chapter_ids:
+            return Response({'error': 'chapter_ids list is required'}, status=400)
+
+        from django.db import transaction
+        with transaction.atomic():
+            for idx, c_id in enumerate(chapter_ids):
+                CourseChapter.objects.filter(id=c_id).update(priority=idx + 1)
+
+        return Response({'status': 'success'})
+
 
 class AdminCourseLessonViewSet(viewsets.ModelViewSet):
     """
@@ -119,6 +138,23 @@ class AdminCourseLessonViewSet(viewsets.ModelViewSet):
         if lesson:
             lesson.delete()
 
+    @action(detail=False, methods=['post'])
+    def reorder(self, request):
+        """
+        Reorders lessons in bulk.
+        Format: {"lesson_ids": [id1, id2, ...]}
+        """
+        lesson_ids = request.data.get('lesson_ids', [])
+        if not lesson_ids:
+            return Response({'error': 'lesson_ids list is required'}, status=400)
+
+        from django.db import transaction
+        with transaction.atomic():
+            for idx, l_id in enumerate(lesson_ids):
+                CourseLesson.objects.filter(id=l_id).update(priority=idx + 1)
+
+        return Response({'status': 'success'})
+
 
 class AdminCourseAttachmentViewSet(viewsets.ModelViewSet):
     """