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import 'multer'
import * as validator from 'validator'
import { sep } from 'path'
function exists (value: any) {
return value !== undefined && value !== null
}
function isSafePath (p: string) {
return exists(p) &&
(p + '').split(sep).every(part => {
return [ '..' ].includes(part) === false
})
}
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,
isSafePath,
isUUIDValid,
isIdOrUUIDValid,
isDateValid,
toValueOrNull,
isBooleanValid,
toIntOrNull,
toArray,
toIntArray,
isFileValid
}
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