<?php
if (session_status() === PHP_SESSION_NONE) {
    session_start();
}

require_once($_SERVER['DOCUMENT_ROOT'] . '/db.php');

function isAuthenticated() {
    if (empty($_SESSION['user_id']) || empty($_SESSION['uniqueid'])) {
        return false;
    }

    try {
        $conn = getConnection();
        $stmt = $conn->prepare("SELECT id FROM users WHERE id = :id AND uniqueid = :uniqueid");
        $stmt->execute([
            'id' => $_SESSION['user_id'],
            'uniqueid' => $_SESSION['uniqueid'],
        ]);

        return $stmt->fetch() !== false;
    } catch (PDOException $e) {
        return false; // fail safe
    }
}

function requireLogin() {
    if (!isAuthenticated()) {
        header("Location: /landing.php");
        exit();
    }
}