import type { ReadActor } from './read-trail.service';

/**
 * Resolves the {@link ReadActor} of a cookie-session request (issue #222).
 * Structural parameter instead of `AuthedRequest` so the read-trail module
 * never imports the auth guard. PAT requests build their key directly
 * (`token:<id>`, public-api controller).
 */
export function readActorOf(request: {
  user?: { id: string } | null;
  sessionId?: string;
}): ReadActor {
  return {
    actorId: request.user?.id ?? null,
    sessionKey: request.sessionId ? `session:${request.sessionId}` : 'anon',
  };
}