Merge pull request #49 from SAIG-KMITL/feat/chapter-module-service

Implement comprehensive features for course, exam, chat, and user management

src/chapter/chapter.controller.ts

@@ -48,6 +48,7 @@ import { Folder } from 'src/file/enums/folder.enum';
 import { FileInterceptor } from '@nestjs/platform-express';
 import { EnrollmentService } from 'src/enrollment/enrollment.service';
 import { Public } from 'src/shared/decorators/public.decorator';
+import { VideoGuard } from './guards/video.guard';
 
 @Controller('chapter')
 @ApiTags('Chapters')
@@ -57,21 +58,27 @@ export class ChapterController {
     private readonly chapterService: ChapterService,
     private readonly courseModuleService: CourseModuleService,
     private readonly fileService: FileService,
-    private readonly enrollmentService: EnrollmentService,
   ) { }
 
   @Get(':id/video')
   @ApiParam({
     name: 'id',
     type: String,
-    description: 'Course id',
+    description: 'chapter id',
   })
   @Public()
   @ApiResponse({
     status: HttpStatus.OK,
     description: 'Get chapter video',
     type: StreamableFile,
   })
+  @ApiQuery({
+    name: 'token',
+    type: String,
+    required: false,
+    description: 'Access token',
+  })
+  @UseGuards(VideoGuard)
   async getVideo(
     @Param(
       'id',

src/chapter/guards/video.guard.ts

@@ -0,0 +1,76 @@
+import {
+  CanActivate,
+  ExecutionContext,
+  Injectable,
+  UnauthorizedException,
+  NotFoundException,
+  ForbiddenException,
+} from '@nestjs/common';
+import { JwtService } from '@nestjs/jwt';
+import { JwtPayloadDto } from 'src/auth/dtos/jwt-payload.dto';
+import { ConfigService } from '@nestjs/config';
+import { GLOBAL_CONFIG } from 'src/shared/constants/global-config.constant';
+import { AuthenticatedRequest } from 'src/auth/interfaces/authenticated-request.interface';
+import { EnrollmentService } from 'src/enrollment/enrollment.service';
+import { Role } from 'src/shared/enums';
+import { InjectRepository } from '@nestjs/typeorm';
+import { Chapter } from '../chapter.entity';
+import { Repository } from 'typeorm';
+
+@Injectable()
+export class VideoGuard implements CanActivate {
+  constructor(
+    @InjectRepository(Chapter)
+    private readonly chapterRepository: Repository<Chapter>,
+    private readonly jwtService: JwtService,
+    private readonly configService: ConfigService,
+    private readonly enrollmentService: EnrollmentService,
+  ) {}
+
+  async canActivate(context: ExecutionContext): Promise<boolean> {
+    const request: AuthenticatedRequest = context.switchToHttp().getRequest();
+    const chapterId = request.params.id;
+    const chapter = await this.chapterRepository.findOne({
+      where: { id: chapterId },
+      relations: {
+        module: {
+          course: {
+            teacher: true,
+          },
+        },
+      }
+    });
+    if (!chapter) throw new NotFoundException('Chapter not found');
+    if (chapter.isPreview) return true;
+    const token = request.query.token as string;
+    if (!token) throw new UnauthorizedException('Unauthorized access');
+    try {
+      request.user = await this.jwtService.verifyAsync<JwtPayloadDto>(token, {
+        secret: this.configService.getOrThrow<string>(
+          GLOBAL_CONFIG.JWT_ACCESS_SECRET,
+        ),
+      });
+    } catch (error) {
+      throw new UnauthorizedException('Unauthorized access');
+    }
+    const userId = request.user.id;
+    const courseId = chapter.module.course.id;
+    switch (request.user.role) {
+      case Role.TEACHER:
+        if (chapter.module.course.teacher.id !== userId)
+          throw new ForbiddenException('Insufficient permissions');
+        break;
+      case Role.STUDENT:
+        const enrollment = await this.enrollmentService.findOne({
+          course: { id: courseId },
+          user: { id: userId },
+        });
+        if (!enrollment)
+          throw new ForbiddenException('Insufficient permissions');
+        break;
+      default:
+        throw new ForbiddenException('Insufficient permissions');
+    }
+    return true;
+  }
+}