Feature/issue 2/validate file format

[lcaohoanq]

I've added the route "validate file format" when uploading file. The changed is too much because i have merge from main to take a newest structure when working with my branch on the old structure.

See #2 for more information

In this issue, i'm using:

• multer : handle the upload processing
  • I have define the file structure receive from multer

interface IFileType {
  fieldname: string;
  originalname: string;
  encoding: string;
  mimetype: string;
  destination: string;
  filename: string;
  path: string;
  size: number;
}

• Put file uploaded in upload directory

const uploadDir = './src/module/upload';

export function initUploadDir(): string {
  if (!fs.existsSync(uploadDir)) {
    fs.mkdirSync(uploadDir);
  }
  return uploadDir;
}
export function configUploadFile(uploadDir: string): StorageEngine {
  const storage = diskStorage({
    destination: function (req, file, cb) {
      cb(null, uploadDir);
    },
    filename: function (req, file, cb) {
      cb(null, file.originalname + '-' + Date.now());
    },
  });
  return storage;
}

• But there have a problem i have reference in https://github.com/PiedTeam/DreameCloneTraining-BE-Project/issues/2#issuecomment-2053886451 about multer is always do upload first whenever the validate is sucess or not (because the order of process, file is upload and the validation come after)

  const upload = multer({ storage: storage });
  fileRouter.post('/upload', upload.single('myFile'), fileValidator);

  I'm changing to use multer with buffer data instead, hold the data as buffer (prevent it write to file). But my solution affects the validate condition (ensure file can be open, do not corrupted). The buffer is always can read even file is corrupted.

const upload = multer({ storage: multer.memoryStorage() }).single('myFile')
fileRouter.post('/upload', upload, fileValidator, uploadController)

• Structure of file buffer

  interface IFileBuffer {
  fieldname: string
  originalname: string
  encoding: string
  buffer: Buffer
  size: number
  }

  ---

• xlsx : handle file excel
  • Using try-catch block with XLSX.readFile(file.path), if any error it will throw and cause the File is corrupted error
• Regex for match the file name format as required: /^(\w+\s)+(Dreame).(vi|en).(xlsx|xls|csv)$/
• Size of file i take from multer, ensure <=10MB (10000000 Bytes in decimal)

  Testing:

• File Name
  • 
• File Size
  • 
• File corrupted
  • 
• Ok
  • 

[nnh53]

@hoangday185 review for me