<?php
/**
 * Admin Authentication Middleware
 */
session_start();

require_once dirname(__DIR__) . '/config.php';

function isLoggedIn(): bool {
    return isset($_SESSION['blog_admin_id']) && !empty($_SESSION['blog_admin_id']);
}

function requireLogin(): void {
    if (!isLoggedIn()) {
        header('Location: ' . BLOG_URL . '/admin/login.php');
        exit;
    }
}

function getAdminUser(): ?array {
    if (!isLoggedIn()) return null;
    $db = getDB();
    $stmt = $db->prepare("SELECT id, username FROM blog_admins WHERE id = :id LIMIT 1");
    $stmt->execute([':id' => $_SESSION['blog_admin_id']]);
    return $stmt->fetch() ?: null;
}