AI 项目在线编辑器

<?php
declare(strict_types=1);

/**
 * 新闻工具（无需Key）：
 * - RSS：BBC 等 RSS -> 解析 XML -> JSON
 * - HN：Hacker News Algolia Search API -> JSON（无需Key）
 *
 * 设计目标：群聊里“随手拉点新闻话题”，轻量稳定，不追求全网聚合。
 * 为避免与其他工具冲突：所有辅助函数加前缀 news_。
 */

function news_http_get(string $url, int $timeoutSec = 12, array $headers = []): array
{
  $ch = curl_init($url);
  if ($ch === false) throw new RuntimeException('curl_init failed');

$baseHeaders = array_merge([
    'User-Agent: Mozilla/5.0 (compatible; ai-chat-tool/1.0)',
    'Accept: */*',
  ], $headers);

curl_setopt_array($ch, [
    CURLOPT_RETURNTRANSFER => true,
    CURLOPT_CONNECTTIMEOUT => $timeoutSec,
    CURLOPT_TIMEOUT => $timeoutSec,
    CURLOPT_FOLLOWLOCATION => true,
    CURLOPT_MAXREDIRS => 5,
    CURLOPT_HTTPHEADER => $baseHeaders,
    CURLOPT_ENCODING => '',
  ]);

$resp = curl_exec($ch);
  $errno = curl_errno($ch);
  $err = curl_error($ch);
  $status = (int)curl_getinfo($ch, CURLINFO_HTTP_CODE);
  curl_close($ch);

if ($errno !== 0) return ['ok' => false, 'status' => 0, 'body' => '', 'error' => 'cURL error: ' . $err];
  if ($status < 200 || $status >= 300) return ['ok' => false, 'status' => $status, 'body' => (string)$resp, 'error' => 'HTTP ' . $status];

return ['ok' => true, 'status' => $status, 'body' => (string)$resp, 'error' => ''];
}

function news_http_get_json(string $url, int $timeoutSec = 12): array
{
  $r = news_http_get($url, $timeoutSec, ['Accept: application/json']);
  if (!$r['ok']) throw new RuntimeException($r['error']);
  $data = json_decode($r['body'], true);
  if (!is_array($data)) throw new RuntimeException('Invalid JSON');
  return $data;
}

function news_strip(string $s): string
{
  $s = html_entity_decode($s, ENT_QUOTES | ENT_HTML5, 'UTF-8');
  $s = preg_replace('/\s+/u', ' ', $s) ?? $s;
  return trim($s);
}

function news_parse_rss(string $xml, int $limit = 10): array
{
  // 兼容 RSS2.0 / Atom（简单处理）
  libxml_use_internal_errors(true);
  $sx = simplexml_load_string($xml, 'SimpleXMLElement', LIBXML_NOCDATA);
  if ($sx === false) throw new RuntimeException('Invalid XML');

$items = [];

// RSS 2.0: <rss><channel><item>...
  if (isset($sx->channel->item)) {
    foreach ($sx->channel->item as $it) {
      $title = news_strip((string)($it->title ?? ''));
      $link  = news_strip((string)($it->link ?? ''));
      $desc  = news_strip((string)($it->description ?? ''));
      $pub   = news_strip((string)($it->pubDate ?? ''));
      if ($title === '' && $link === '') continue;

$items[] = [
        'title' => $title,
        'url' => $link,
        'summary' => $desc,
        'published' => $pub,
      ];
      if (count($items) >= $limit) break;
    }
    return $items;
  }

// Atom: <feed><entry>...
  if (isset($sx->entry)) {
    foreach ($sx->entry as $en) {
      $title = news_strip((string)($en->title ?? ''));
      $link = '';
      if (isset($en->link)) {
        foreach ($en->link as $l) {
          $href = (string)($l['href'] ?? '');
          if ($href !== '') { $link = $href; break; }
        }
      }
      $summary = news_strip((string)($en->summary ?? $en->content ?? ''));
      $pub = news_strip((string)($en->updated ?? $en->published ?? ''));

if ($title === '' && $link === '') continue;

$items[] = [
        'title' => $title,
        'url' => $link,
        'summary' => $summary,
        'published' => $pub,
      ];
      if (count($items) >= $limit) break;
    }
    return $items;
  }

return [];
}

function news_filter_by_query(array $items, string $query): array
{
  $q = mb_strtolower(trim($query));
  if ($q === '') return $items;

$out = [];
  foreach ($items as $it) {
    $hay = mb_strtolower(($it['title'] ?? '') . ' ' . ($it['summary'] ?? ''));
    if (mb_strpos($hay, $q) !== false) $out[] = $it;
  }
  return $out;
}

return [
  'name' => 'get_news',
  'description' => '获取新闻（默认无需Key）：支持 RSS 聚合（BBC等）与 Hacker News（Algolia，无Key）。',
  'parameters' => [
    'type' => 'object',
    'properties' => [
      'source' => [
        'type' => 'string',
        'description' => '新闻源：bbc_world / bbc_top / hn_frontpage / custom_rss',
        'default' => 'bbc_world'
      ],
      'limit' => [
        'type' => 'integer',
        'description' => '返回条数，默认 8，最大 20',
        'default' => 8
      ],
      'query' => [
        'type' => 'string',
        'description' => '可选：关键词过滤（在标题/摘要里包含即可）',
      ],
      'rss_url' => [
        'type' => 'string',
        'description' => '当 source=custom_rss 时必填：RSS 地址'
      ],
    ],
    'required' => ['source'],
  ],
  'run' => function(array $args, array $context) {
    $source = trim((string)($args['source'] ?? 'bbc_world'));
    $limit = (int)($args['limit'] ?? 8);
    if ($limit <= 0) $limit = 8;
    if ($limit > 20) $limit = 20;

$query = trim((string)($args['query'] ?? ''));

// 预置源
    $rssMap = [
      'bbc_world' => 'https://feeds.bbci.co.uk/news/world/rss.xml',
      'bbc_top'   => 'https://feeds.bbci.co.uk/news/rss.xml',
    ];

if ($source === 'hn_frontpage') {
      // HN front_page（Algolia，无Key）
      $url = 'https://hn.algolia.com/api/v1/search?tags=front_page';
      $data = news_http_get_json($url, 12);

$hits = $data['hits'] ?? [];
      $items = [];
      if (is_array($hits)) {
        foreach ($hits as $h) {
          if (!is_array($h)) continue;
          $title = news_strip((string)($h['title'] ?? $h['story_title'] ?? ''));
          $link  = news_strip((string)($h['url'] ?? $h['story_url'] ?? ''));
          $author = news_strip((string)($h['author'] ?? ''));
          $created = $h['created_at'] ?? '';
          $summary = $author !== '' ? ('by ' . $author) : '';
          if ($title === '' && $link === '') continue;

$items[] = [
            'title' => $title,
            'url' => $link,
            'summary' => $summary,
            'published' => (string)$created,
          ];
          if (count($items) >= $limit) break;
        }
      }

$items = news_filter_by_query($items, $query);

return [
        'ok' => true,
        'source' => 'hn_frontpage',
        'endpoint' => $url,
        'count' => count($items),
        'items' => $items,
        'note' => 'HN Search API（Algolia）无Key，但有速率限制。',
      ];
    }

// RSS 模式
    $rssUrl = '';
    if ($source === 'custom_rss') {
      $rssUrl = trim((string)($args['rss_url'] ?? ''));
      if ($rssUrl === '') throw new RuntimeException('source=custom_rss 时 rss_url 不能为空');
    } elseif (isset($rssMap[$source])) {
      $rssUrl = $rssMap[$source];
    } else {
      throw new RuntimeException('未知 source：' . $source);
    }

$r = news_http_get($rssUrl, 12, ['Accept: application/rss+xml, application/xml;q=0.9, */*;q=0.8']);
    if (!$r['ok']) {
      return ['ok' => false, 'error' => $r['error'], 'source' => $source, 'endpoint' => $rssUrl];
    }

$items = news_parse_rss($r['body'], $limit);
    $items = news_filter_by_query($items, $query);

return [
      'ok' => true,
      'source' => $source,
      'endpoint' => $rssUrl,
      'count' => count($items),
      'items' => $items,
      'note' => 'RSS 无Key，稳定；不同站点的发布时间字段格式可能不同。',
    ];
  },
];

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