<?php
/**
 * 简航 SimpleNav —— 添加/编辑网站时自动抓取元信息（供后台 AJAX 调用）
 * 流程：访问网址拿标题 → 解析页面/ manifest 里的高分辨率图标候选 → 择优下载到本地
 * 返回：{ ok, name, short, icon, icon_url, candidates, url }
 */
declare(strict_types=1);
require_once __DIR__ . '/_auth.php';
require_login();
send_no_cache();

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);
$iconFile = download_best_icon($meta['icons'], $domain);

$name = $meta['name'] !== '' ? $meta['name'] : ($meta['title'] !== '' ? $meta['title'] : $domain);

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