add user role hierearchy lookup and management function

server/src/types/user.ts

@@ -1,6 +1,17 @@
 export const UserRoles = ["user", "admin", "superadmin", "demo"] as const;
 export type UserRole = (typeof UserRoles)[number];
 
+export const RoleHierarchy: Record<UserRole, number> = {
+	demo: 0,
+	user: 1,
+	admin: 2,
+	superadmin: 3,
+};
+
+export const canManageRole = (actorRole: UserRole, targetRole: UserRole): boolean => {
+	return RoleHierarchy[actorRole] > RoleHierarchy[targetRole];
+};
+
 export interface UserProfileImage {
 	data?: Buffer;
 	contentType?: string;