AI 项目在线编辑器

<?php
declare(strict_types=1);

return [
  'name' => 'search_crossref',
  'description' => '在 Crossref 检索 DOI/论文信息（works endpoint）。',
  'parameters' => [
    'type' => 'object',
    'properties' => [
      'query' => ['type' => 'string', 'description' => '检索关键词，例如：graph neural networks'],
      'rows'  => ['type' => 'integer', 'description' => '返回条数，默认 5', 'default' => 5],
    ],
    'required' => ['query'],
  ],
  'run' => function(array $args, array $context) {

$http_get_json = function(string $url, int $timeoutSec = 10, array $headers = []): array {
      $ch = curl_init($url);
      if ($ch === false) throw new RuntimeException('curl_init failed');

$hdr = array_merge(['Accept: application/json'], $headers);

curl_setopt_array($ch, [
        CURLOPT_RETURNTRANSFER => true,
        CURLOPT_CONNECTTIMEOUT => $timeoutSec,
        CURLOPT_TIMEOUT => $timeoutSec,
        CURLOPT_HTTPHEADER => $hdr,
      ]);

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

if ($errno !== 0) throw new RuntimeException('cURL error: ' . $err);
      if ($status < 200 || $status >= 300) throw new RuntimeException('HTTP ' . $status);

$data = json_decode((string)$resp, true);
      if (!is_array($data)) throw new RuntimeException('Invalid JSON');
      return $data;
    };

$query = trim((string)($args['query'] ?? ''));
    $rows = (int)($args['rows'] ?? 5);
    if ($rows <= 0) $rows = 5;
    if ($query === '') throw new RuntimeException('query 不能为空');

$url = 'https://api.crossref.org/works?' . http_build_query([
      'query' => $query,
      'rows' => $rows,
    ]);

try {
      $resp = $http_get_json($url, 12, ['User-Agent: php-tool/1.0']);
    } catch (Throwable $e) {
      return "Error fetching data from Crossref: " . $e->getMessage();
    }

$items = $resp['message']['items'] ?? [];
    if (!is_array($items) || count($items) === 0) {
      return "No results found on Crossref for '{$query}'.";
    }

$resultsList = [];
    $citationsList = [];

$emitter = $context['event_emitter'] ?? null;
    $canEmit = is_callable($emitter);

$i = 0;
    foreach ($items as $itm) {
      if (!is_array($itm)) continue;
      $i++;

$titleArr = $itm['title'] ?? [];
      $title = (is_array($titleArr) && isset($titleArr[0])) ? (string)$titleArr[0] : 'N/A';

$authorNames = [];
      $authorsArr = $itm['author'] ?? [];
      if (is_array($authorsArr)) {
        foreach ($authorsArr as $a) {
          if (!is_array($a)) continue;
          $given = trim((string)($a['given'] ?? ''));
          $family = trim((string)($a['family'] ?? ''));
          $full = trim($given . ' ' . $family);
          if ($full !== '') $authorNames[] = $full;
        }
      }
      $authors = count($authorNames) ? implode(', ', $authorNames) : 'N/A';

$urlItem = (string)($itm['URL'] ?? '#');

$year = 'N/A';
      $dp = $itm['issued']['date-parts'][0] ?? null;
      if (is_array($dp) && isset($dp[0]) && $dp[0]) $year = (string)$dp[0];

$resultsList[] = "{$i}. {$title}\n   Authors: {$authors}\n   Year: {$year}\n   URL: {$urlItem}";

if ($urlItem !== '#') {
        $citationsList[] = "[{$i}] {$urlItem}";
        if ($canEmit) {
          $emitter([
            'type' => 'citation',
            'data' => [
              'document' => [$title],
              'metadata' => [['source' => $urlItem]],
              'source' => ['name' => $title],
            ],
          ]);
        }
      }

if ($i >= $rows) break;
    }

$output = implode("\n\n", $resultsList);
    if (count($citationsList)) {
      $output .= "\n\n---\n\n**Citation Links:**\n" . implode("\n", $citationsList);
    }
    return $output;
  },
];

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