KC-APP/backend/src/chat/caller.util.ts

import { AuthenticatedUser } from '../auth/authenticated-request';
import { GuestJwtPayload } from '../auth/guest-auth.service';
import { ChatCaller } from './chat.service';

function isGuestPayload(user: unknown): user is GuestJwtPayload {
  return !!user && typeof user === 'object' && 'guestId' in user;
}

/// req.user is either an AuthenticatedUser (Authentik) or a GuestJwtPayload,
/// depending on which strategy AuthGuard(['authentik','guest']) picked.
export function resolveChatCaller(user: AuthenticatedUser | GuestJwtPayload): ChatCaller {
  return isGuestPayload(user) ? { kind: 'guest', guest: user } : { kind: 'user', user };
}