server/helpers/custom-validators/misc.ts

   1 import 'multer'
   2 import * as validator from 'validator'
   3
   4 function exists (value: any) {
   5   return value !== undefined && value !== null
   6 }
   7
   8 function isArray (value: any) {
   9   return Array.isArray(value)
  10 }
  11
  12 function isDateValid (value: string) {
  13   return exists(value) && validator.isISO8601(value)
  14 }
  15
  16 function isIdValid (value: string) {
  17   return exists(value) && validator.isInt('' + value)
  18 }
  19
  20 function isUUIDValid (value: string) {
  21   return exists(value) && validator.isUUID('' + value, 4)
  22 }
  23
  24 function isIdOrUUIDValid (value: string) {
  25   return isIdValid(value) || isUUIDValid(value)
  26 }
  27
  28 function isBooleanValid (value: string) {
  29   return typeof value === 'boolean' || (typeof value === 'string' && validator.isBoolean(value))
  30 }
  31
  32 function isFileValid (
  33   files: { [ fieldname: string ]: Express.Multer.File[] } | Express.Multer.File[],
  34   mimeTypeRegex: string,
  35   field: string,
  36   optional = false
  37 ) {
  38   // Should have files
  39   if (!files) return optional
  40   if (isArray(files)) return optional
  41
  42   // Should have a file
  43   const fileArray = files[ field ]
  44   if (!fileArray || fileArray.length === 0) {
  45     return optional
  46   }
  47
  48   // The file should exist
  49   const file = fileArray[ 0 ]
  50   if (!file || !file.originalname) return false
  51
  52   return new RegExp(`^${mimeTypeRegex}$`, 'i').test(file.mimetype)
  53 }
  54
  55 // ---------------------------------------------------------------------------
  56
  57 export {
  58   exists,
  59   isArray,
  60   isIdValid,
  61   isUUIDValid,
  62   isIdOrUUIDValid,
  63   isDateValid,
  64   isBooleanValid,
  65   isFileValid
  66 }