static parseUri()

in src/desktop/remotefs/gitlab_remote_file_system.ts [71:111]
33 lines of code
7 McCabe index (conditional complexity)

  static parseUri(uri: vscode.Uri): GitLabRemotePath {
    if (uri.scheme !== REMOTE_URI_SCHEME) {
      throw new HelpError(
        `URI is not a GitLab remote. It begins with ${uri.scheme} but it should begin with ${REMOTE_URI_SCHEME}`,
        { section: README_SECTIONS.REMOTEFS },
      );
    }

    const query = new URLSearchParams(uri.query);
    const project = query.get('project');
    if (!project)
      throw new HelpError(
        'URI is not a GitLab remote. The URI must contain a project= query parameter',
        { section: README_SECTIONS.REMOTEFS },
      );

    const ref = query.get('ref');
    if (!ref)
      throw new HelpError(
        'URI is not a GitLab remote. The URI must contain a ref= query parameter',
        { section: README_SECTIONS.REMOTEFS },
      );

    // Find the instance with a matching authority and a subpath that is a
    // prefix of the URI's path.
    const instance = accountService
      .getInstanceUrls()
      .map(x => vscode.Uri.parse(x))
      .find(x => uri.authority === x.authority && uri.path.startsWith(x.path));
    if (!instance)
      throw new HelpError(
        `Cannot open ${uri}: missing token for GitLab instance ${uri.authority}`,
        { section: README_SECTIONS.SETUP },
      );

    // To get the file path, we first remove the instance subpath, then the
    // project label.
    const pathWithoutInstanceSubpath = uri.path.substring(instance.path.length).replace(/^\//, '');
    const pathWithoutFirstSegment = pathWithoutInstanceSubpath.replace(/^[^/]+(\/|$)/, '');
    return { instance, project, ref, path: pathWithoutFirstSegment };
  }