import 'multer' import * as validator from 'validator' function exists (value: any) { return value !== undefined && value !== null } function isArray (value: any) { return Array.isArray(value) } function isNotEmptyIntArray (value: any) { return Array.isArray(value) && value.every(v => validator.isInt('' + v)) && value.length !== 0 } function isArrayOf (value: any, validator: (value: any) => boolean) { return isArray(value) && value.every(v => validator(v)) } function isDateValid (value: string) { return exists(value) && validator.isISO8601(value) } function isIdValid (value: string) { return exists(value) && validator.isInt('' + value) } function isUUIDValid (value: string) { return exists(value) && validator.isUUID('' + value, 4) } function isIdOrUUIDValid (value: string) { return isIdValid(value) || isUUIDValid(value) } function isBooleanValid (value: any) { return typeof value === 'boolean' || (typeof value === 'string' && validator.isBoolean(value)) } function toIntOrNull (value: string) { if (value === 'null') return null return validator.toInt(value) } function toValueOrNull (value: string) { if (value === 'null') return null return value } function toArray (value: any) { if (value && isArray(value) === false) return [ value ] return value } function toIntArray (value: any) { if (!value) return [] if (isArray(value) === false) return [ validator.toInt(value) ] return value.map(v => validator.toInt(v)) } function isFileValid ( files: { [ fieldname: string ]: Express.Multer.File[] } | Express.Multer.File[], mimeTypeRegex: string, field: string, maxSize: number | null, optional = false ) { // Should have files if (!files) return optional if (isArray(files)) return optional // Should have a file const fileArray = files[ field ] if (!fileArray || fileArray.length === 0) { return optional } // The file should exist const file = fileArray[ 0 ] if (!file || !file.originalname) return false // Check size if ((maxSize !== null) && file.size > maxSize) return false return new RegExp(`^${mimeTypeRegex}$`, 'i').test(file.mimetype) } // --------------------------------------------------------------------------- export { exists, isArrayOf, isNotEmptyIntArray, isArray, isIdValid, isUUIDValid, isIdOrUUIDValid, isDateValid, toValueOrNull, isBooleanValid, toIntOrNull, toArray, toIntArray, isFileValid }