+function isIntOrNull (value: any) {
+ return value === null || validator.isInt('' + value)
+}
+
+// ---------------------------------------------------------------------------
+
+function isFileValid (options: {
+ files: UploadFilesForCheck
+
+ maxSize: number | null
+ mimeTypeRegex: string | null
+
+ field?: string
+
+ optional?: boolean // Default false
+}) {
+ const { files, mimeTypeRegex, field, maxSize, optional = false } = options
+
+ // Should have files
+ if (!files) return optional
+
+ const fileArray = isArray(files)
+ ? files
+ : files[field]
+
+ if (!fileArray || !isArray(fileArray) || fileArray.length === 0) {
+ return optional
+ }
+
+ // The file exists
+ const file = fileArray[0]
+ if (!file || !file.originalname) return false
+
+ // Check size
+ if ((maxSize !== null) && file.size > maxSize) return false
+
+ if (mimeTypeRegex === null) return true
+
+ return checkMimetypeRegex(file.mimetype, mimeTypeRegex)
+}
+
+function checkMimetypeRegex (fileMimeType: string, mimeTypeRegex: string) {
+ return new RegExp(`^${mimeTypeRegex}$`, 'i').test(fileMimeType)
+}
+
+// ---------------------------------------------------------------------------
+
+function toCompleteUUID (value: string) {
+ if (isShortUUID(value)) return shortToUUID(value)
+
+ return value
+}
+
+function toCompleteUUIDs (values: string[]) {
+ return values.map(v => toCompleteUUID(v))
+}
+