0; }
function isAdmin(): bool{ return !empty($_SESSION['admin']); }
function requireLogin(string $back = ''): void {
if (!authed()) {
flash('Please log in to continue.', 'warning');
go('/login.php?next='.urlencode($back ?: $_SERVER['REQUEST_URI']));
}
}
function requireAdmin(): void {
if (!isAdmin()) { flash('Access denied.', 'error'); go('/index.php'); }
}
function loginUser(array $u): void {
session_regenerate_id(true);
$_SESSION['uid'] = $u['id'];
$_SESSION['uname'] = $u['username'];
$_SESSION['admin'] = (bool)$u['is_admin'];
qrun("UPDATE users SET last_login=datetime('now') WHERE id=?", [$u['id']]);
}
function logoutUser(): void {
session_unset(); session_destroy();
session_start(); session_regenerate_id(true);
}
/* ── Flash ────────────────────────────────────────────── */
function flash(string $msg, string $type = 'info'): void { $_SESSION['_flash'][] = [$type, $msg]; }
function getFlashes(): array { $f = $_SESSION['_flash'] ?? []; unset($_SESSION['_flash']); return $f; }
/* ── Output ───────────────────────────────────────────── */
function e(mixed $v): string { return htmlspecialchars((string)$v, ENT_QUOTES|ENT_SUBSTITUTE, 'UTF-8'); }
function go(string $url): never { header('Location:'.$url); exit; }
/* ── Input ────────────────────────────────────────────── */
function p(string $k, mixed $d = ''): mixed { return $_POST[$k] ?? $d; }
function g(string $k, mixed $d = ''): mixed { return $_GET[$k] ?? $d; }
function iget(string $k): int { return (int)($_POST[$k] ?? $_GET[$k] ?? 0); }
function ps(string $k): string { return trim((string)($_POST[$k] ?? '')); }
function gs(string $k): string { return trim((string)($_GET[$k] ?? '')); }
function isPost(): bool { return strtoupper($_SERVER['REQUEST_METHOD']) === 'POST'; }
/* ── CSRF ─────────────────────────────────────────────── */
function csrf(): string {
if (empty($_SESSION['csrf'])) $_SESSION['csrf'] = bin2hex(random_bytes(24));
return $_SESSION['csrf'];
}
function csrfField(): string { return ''; }
function csrfCheck(): void {
if (!hash_equals(csrf(), p('_csrf', ''))) { http_response_code(403); die('Invalid CSRF token.'); }
}
/* ── Settings ─────────────────────────────────────────── */
function setting(string $k, string $def = ''): string {
$v = qval("SELECT value FROM settings WHERE key=?", [$k]);
return $v !== false ? (string)$v : $def;
}
function setSetting(string $k, string $v): void {
qrun("INSERT INTO settings(key,value)VALUES(?,?)ON CONFLICT(key)DO UPDATE SET value=excluded.value", [$k,$v]);
}
/* ── Ownership ────────────────────────────────────────── */
function owns(int $bizId): bool {
if (isAdmin()) return true;
if (!authed()) return false;
return (bool)qval("SELECT 1 FROM business_owners WHERE user_id=? AND business_id=?", [uid(),$bizId]);
}
/* ── Stars ────────────────────────────────────────────── */
function starDisplay(float $avg): string {
$r = round($avg); $out = '';
for ($i = 1; $i <= 5; $i++) $out .= '★';
return $out.'';
}
function starPicker(string $name = 'rating', int $sel = 0): string {
$out = '';
for ($i = 5; $i >= 1; $i--) {
$chk = $sel === $i ? 'checked' : '';
$out .= '';
$out .= '';
}
return $out.'
';
}
/* ── Date / Money ─────────────────────────────────────── */
function ago(string $dt): string {
$d = time() - strtotime($dt);
if ($d < 60) return 'Just now';
if ($d < 3600) return floor($d/60).'m ago';
if ($d < 86400) return floor($d/3600).'h ago';
if ($d < 604800) return floor($d/86400).'d ago';
return date('M j, Y', strtotime($dt));
}
function fdate(string $dt, string $fmt = 'M j, Y'): string { return date($fmt, strtotime($dt)); }
function money(float $n): string { return '$'.number_format($n, 2); }
/* ── Misc ─────────────────────────────────────────────── */
function alertIcon(string $t): string { return match($t){'news'=>'📰','event'=>'🎉','warning'=>'⚠️','sale'=>'🏷️',default=>'ℹ️'}; }
function parseHours(string $json): array { return json_decode($json ?: '{}', true) ?? []; }
function makeSlug(string $s): string { return trim(preg_replace('/[^a-z0-9]+/','-',strtolower($s)),'-'); }
function uniqueSlug(string $base): string {
$slug = makeSlug($base); $i = 0;
while (qval("SELECT id FROM businesses WHERE slug=?", [$slug.($i?"-$i":"")])) $i++;
return $slug.($i ? "-$i" : "");
}