<?php
require_once __DIR__ . '/config.php';
session_start();

function getPDO(){
    static $pdo = null;
    if ($pdo === null) {
        $dsn = "mysql:host=".DB_HOST.";dbname=".DB_NAME.";charset=utf8mb4";
        $pdo = new PDO($dsn, DB_USER, DB_PASS, [
            PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION,
            PDO::ATTR_DEFAULT_FETCH_MODE => PDO::FETCH_ASSOC,
        ]);
    }
    return $pdo;
}

function is_logged_in(){
    return !empty($_SESSION['user_id']);
}

function current_user(){
    if (!is_logged_in()) return null;
    return ['id'=>$_SESSION['user_id'], 'email'=>$_SESSION['user_email']];
}