<?php
require_once 'database.php';

function sanitizeInput($data) {
    return htmlspecialchars(strip_tags(trim($data)));
}

function generateSlug($title) {
    $slug = strtolower($title);
    $slug = preg_replace('/[^a-z0-9]+/', '-', $slug);
    $slug = trim($slug, '-');
    return $slug;
}

function formatDate($date) {
    return date('F j, Y', strtotime($date));
}

function getExcerpt($content, $length = 150) {
    $excerpt = strip_tags($content);
    if (strlen($excerpt) > $length) {
        $excerpt = substr($excerpt, 0, $length) . '...';
    }
    return $excerpt;
}

function isLoggedIn() {
    return isset($_SESSION['user_id']);
}

function isAdmin() {
    return isset($_SESSION['role']) && $_SESSION['role'] === 'admin';
}

function redirect($url) {
    header("Location: $url");
    exit();
}
?>