update

controllers/chapterController.js

@@ -330,6 +330,98 @@ class ChapterController {
       next(error);
     }
   }
+
+  /**
+   * Add lesson to chapter (Create lesson within chapter context)
+   */
+  async addLessonToChapter(req, res, next) {
+    try {
+      const { chapterId } = req.params;
+      const lessonData = req.body;
+
+      // Check if chapter exists
+      const chapter = await Chapter.findByPk(chapterId);
+      if (!chapter) {
+        return res.status(404).json({
+          success: false,
+          message: 'Chapter not found',
+        });
+      }
+
+      // Validate required fields
+      if (!lessonData.lesson_number || !lessonData.lesson_title) {
+        return res.status(400).json({
+          success: false,
+          message: 'lesson_number and lesson_title are required',
+        });
+      }
+
+      // Create lesson with chapter_id
+      const lesson = await Lesson.create({
+        ...lessonData,
+        chapter_id: chapterId,
+      });
+
+      // Clear cache
+      await cacheUtils.deletePattern('lessons:*');
+      await cacheUtils.deletePattern(`chapter:${chapterId}:lessons:*`);
+
+      res.status(201).json({
+        success: true,
+        message: 'Lesson added to chapter successfully',
+        data: lesson,
+      });
+    } catch (error) {
+      next(error);
+    }
+  }
+
+  /**
+   * Remove lesson from chapter (Delete lesson within chapter context)
+   */
+  async removeLessonFromChapter(req, res, next) {
+    try {
+      const { chapterId, lessonId } = req.params;
+
+      // Check if chapter exists
+      const chapter = await Chapter.findByPk(chapterId);
+      if (!chapter) {
+        return res.status(404).json({
+          success: false,
+          message: 'Chapter not found',
+        });
+      }
+
+      // Find lesson
+      const lesson = await Lesson.findOne({
+        where: { 
+          id: lessonId,
+          chapter_id: chapterId,
+        },
+      });
+
+      if (!lesson) {
+        return res.status(404).json({
+          success: false,
+          message: 'Lesson not found in this chapter',
+        });
+      }
+
+      await lesson.destroy();
+
+      // Clear cache
+      await cacheUtils.deletePattern('lessons:*');
+      await cacheUtils.deletePattern(`lesson:${lessonId}*`);
+      await cacheUtils.deletePattern(`chapter:${chapterId}:lessons:*`);
+
+      res.json({
+        success: true,
+        message: 'Lesson removed from chapter successfully',
+      });
+    } catch (error) {
+      next(error);
+    }
+  }
 }
 
 module.exports = new ChapterController();