feat: Implement chapter and lesson management with new services and types, and introduce Minio service.

Backend/src/services/ChaptersLesson.service.ts

@@ -0,0 +1,56 @@
+import { prisma } from '../config/database';
+import { Prisma } from '@prisma/client';
+import { config } from '../config';
+import { logger } from '../config/logger';
+import { UnauthorizedError, ValidationError, ForbiddenError, NotFoundError } from '../middleware/errorHandler';
+import jwt from 'jsonwebtoken';
+import {
+    LessonAttachmentData,
+    LessonData,
+    ChapterData,
+    CreateLessonInput,
+    UpdateLessonInput,
+    CreateChapterInput,
+    UpdateChapterInput,
+    ChaptersRequest,
+    DeleteChapterRequest,
+    ReorderChapterRequest,
+    ListChaptersResponse,
+    GetChapterResponse,
+    CreateChapterResponse,
+    UpdateChapterResponse,
+    DeleteChapterResponse,
+    ReorderChapterResponse,
+    ChapterWithLessonsResponse,
+    ListLessonsRequest,
+    GetLessonRequest,
+    CreateLessonRequest,
+    UpdateLessonRequest,
+    DeleteLessonRequest,
+    ReorderLessonsRequest,
+    ListLessonsResponse,
+    GetLessonResponse,
+    CreateLessonResponse,
+    UpdateLessonResponse,
+    DeleteLessonResponse,
+    ReorderLessonsResponse,
+} from "../types/ChaptersLesson.typs";
+
+export class ChaptersLessonService {
+    async listChapters(request: ChaptersRequest): Promise<ListChaptersResponse> {
+        try {
+            const { token, course_id } = request;
+            const decodedToken = jwt.verify(token, config.jwt.secret) as { id: number };
+            const user = await prisma.user.findUnique({ where: { id: decodedToken.id } });
+            if (!user) {
+                throw new UnauthorizedError('Invalid token');
+            }
+            const chapters = await prisma.chapter.findMany({ where: { course_id } });
+            return { code: 200, message: 'Chapters fetched successfully', data: chapters as ChapterData[], total: chapters.length };
+        } catch (error) {
+            logger.error(`Error fetching chapters: ${error}`);
+            throw error;
+        }
+    }
+
+}