'use client';

import type { AuthSessionDTO } from '@/lib/types/generated/AuthSessionDTO';
import { SessionViewModel } from '@/lib/view-models/SessionViewModel';

/**
 * Session Presenter
 *
 * Converts AuthSessionDTO to SessionViewModel for client-side presentation.
 * Pure and deterministic - no side effects.
 */
export class SessionPresenter {
  /**
   * Present session data as a view model
   */
  present(sessionDto: AuthSessionDTO | null): SessionViewModel | null {
    if (!sessionDto || !sessionDto.user) {
      return null;
    }
    
    return new SessionViewModel(sessionDto.user);
  }
}