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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 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 toStringOrNull (value: string) {
if (value === 'null') return null
return value
}
function isFileValid (
files: { [ fieldname: string ]: Express.Multer.File[] } | Express.Multer.File[],
mimeTypeRegex: string,
field: string,
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
return new RegExp(`^${mimeTypeRegex}$`, 'i').test(file.mimetype)
}
// ---------------------------------------------------------------------------
export {
exists,
isArray,
isIdValid,
isUUIDValid,
isIdOrUUIDValid,
isDateValid,
toStringOrNull,
isBooleanValid,
toIntOrNull,
isFileValid
}
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