+ return exists(value) && validator.matches(value, new RegExp(`^[a-z0-9._]{${min},${max}}$`))
+}
+
+function isUserDisplayNameValid (value: string) {
+ return value === null || (exists(value) && validator.isLength(value, CONSTRAINTS_FIELDS.USERS.NAME))
+}
+
+function isUserDescriptionValid (value: string) {
+ return value === null || (exists(value) && validator.isLength(value, CONSTRAINTS_FIELDS.USERS.DESCRIPTION))
+}
+
+function isUserEmailVerifiedValid (value: any) {
+ return isBooleanValid(value)
+}
+
+const nsfwPolicies = values(NSFW_POLICY_TYPES)
+function isUserNSFWPolicyValid (value: any) {
+ return exists(value) && nsfwPolicies.indexOf(value) !== -1
+}
+
+function isUserWebTorrentEnabledValid (value: any) {
+ return isBooleanValid(value)