backend/src/app.controller.ts

import {
  Controller,
  Get,
  Post,
  UseInterceptors,
  UploadedFile,
} from '@nestjs/common';
import { FileInterceptor } from '@nestjs/platform-express';
import { AppService } from './app.service';
import { diskStorage } from 'multer';
import { extname } from 'path';

@Controller()
export class AppController {
  constructor(private readonly appService: AppService) {}

  @Get()
  getHello(): string {
    return this.appService.getHello();
  }

  @Post('api/upload')
  @UseInterceptors(
    FileInterceptor('file', {
      storage: diskStorage({
        destination: './uploads',
        filename: (req, file, cb) => {
          const uniqueSuffix =
            Date.now() + '-' + Math.round(Math.random() * 1e9);
          cb(null, `${uniqueSuffix}${extname(file.originalname)}`);
        },
      }),
    }),
  )
  uploadFile(@UploadedFile() file: Express.Multer.File) {
    // Return the URL to access the uploaded file
    // Note: ensure we serve this directory statically
    return {
      success: true,
      url: `/uploads/${file.filename}`,
    };
  }
}