Function normalizeCloudStorageUrl

src/utils/urlCloudStorage.ts:88–145

(url: string)

 * Pre-signed URLs are returned unchanged.
 */
export function normalizeCloudStorageUrl(url: string): string {
  // Don't modify pre-signed URLs
  if (isPreSignedUrl(url)) {
    return url;
  }

  // Handle s3:// scheme
  if (url.startsWith('s3://')) {
    const match = url.match(/^s3:\/\/([^/]+)\/?(.*)?$/);
    if (match) {
      const [, bucket, path] = match;
      return `https://${bucket}.s3.amazonaws.com/${path || ''}`;
    }
  }

  // Handle gs:// scheme
  if (url.startsWith('gs://')) {
    const match = url.match(/^gs:\/\/([^/]+)\/?(.*)?$/);
    if (match) {
      const [, bucket, path] = match;
      return `https://storage.googleapis.com/${bucket}/${path || ''}`;
    }
  }

  // Handle GCS console URLs
  // https://console.cloud.google.com/storage/browser/bucket/path
  // -> https://storage.googleapis.com/bucket/path
  try {
    const parsed = new URL(url);
    if (parsed.hostname === 'console.cloud.google.com' &&
        parsed.pathname.startsWith('/storage/browser/')) {
      const pathAfterBrowser = parsed.pathname.replace('/storage/browser/', '');
      return `https://storage.googleapis.com/${pathAfterBrowser}`;
    }

    // Handle storage.cloud.google.com URLs (alternative GCS domain)
    // https://storage.cloud.google.com/bucket/path -> https://storage.googleapis.com/bucket/path
    if (parsed.hostname === 'storage.cloud.google.com') {
      return `https://storage.googleapis.com${parsed.pathname}`;
    }

    // Handle Dropbox share URLs
    // https://www.dropbox.com/s/abc123/file.txt?dl=0 -> https://dl.dropboxusercontent.com/s/abc123/file.txt
    // https://www.dropbox.com/scl/fi/abc123/file.txt?rlkey=xyz&dl=0 -> https://dl.dropboxusercontent.com/scl/fi/abc123/file.txt?rlkey=xyz
    if (parsed.hostname === 'www.dropbox.com' || parsed.hostname === 'dropbox.com') {
      // Remove dl parameter and rebuild URL with dl.dropboxusercontent.com
      const params = new URLSearchParams(parsed.search);
      params.delete('dl');
      const queryString = params.toString();
      const newPath = parsed.pathname + (queryString ? `?${queryString}` : '');
      return `https://dl.dropboxusercontent.com${newPath}`;
    }
  } catch {
    // Invalid URL, return as-is
  }

  return url;
}