feat(nestjs): migrate to NestJS

packages/server/src/modules/Roles/Roles.utils.ts

@@ -0,0 +1,13 @@
+import { ServiceError } from '../Items/ServiceError';
+import { ERRORS } from './constants';
+import { Role } from './models/Role.model';
+
+/**
+ * Valdiates role is not predefined.
+ * @param {IRole} role - Role object.
+ */
+export const validateRoleNotPredefined = (role: Role) => {
+  if (role.predefined) {
+    throw new ServiceError(ERRORS.ROLE_PREFINED);
+  }
+};