<?php
/**
 * 简航 SimpleNav —— 添加/编辑网站时自动抓取元信息（供后台 AJAX 调用）
 * 返回：{ ok, name, short, icon, url }
 */
declare(strict_types=1);
require_once __DIR__ . '/_auth.php';
require_login();

header('Content-Type: application/json; charset=utf-8');

$url = isset($_GET['url']) ? norm_url((string)$_GET['url']) : '';
if ($url === '') {
    echo json_encode(['ok' => false, 'msg' => '缺少网址'], JSON_UNESCAPED_UNICODE);
    exit;
}

$meta = fetch_site_meta($url);
$domain = domain_of($meta['final_url'] ?: $url);
$iconFile = '';
if (!empty($meta['icon'])) {
    $iconFile = download_icon($meta['icon'], $domain);
}
if ($iconFile === '' && $domain !== '') {
    // 兜底再试一次根目录 favicon.ico
    $iconFile = download_icon('http://' . $domain . '/favicon.ico', $domain);
}

echo json_encode([
    'ok'    => true,
    'url'   => $url,
    'name'  => $meta['name'] !== '' ? $meta['name'] : ($meta['title'] !== '' ? $meta['title'] : $domain),
    'short' => $meta['name'] !== '' ? $meta['name'] : $domain,
    'icon'  => $iconFile,
    'icon_url' => $iconFile !== '' ? icon_src($iconFile) : '',
], JSON_UNESCAPED_UNICODE);