% my $side_bar = content_block 'sidebar';

% my $classes = '';

% if (length($side_bar) == 0) {
%   if (my $nav = navigation('settings')) {
%     $side_bar = b('<nav>' . $nav . '</nav>');
%     $classes = 'settings ';
%   };
% }

% my $is_empty_sidebar = $side_bar =~ /^\s*(<div[^>]*>\s*<\/div>\s*)*$/i;

% if ($is_empty_sidebar) {
%   $classes .= ' invisible';
% };

% if (length($side_bar) == 0 || stash('sidebar_off')) {
%   $classes .= ' off';
% } elsif (stash('sidebar_active')) {
%   $classes .= ' active';
% } elsif (stash('login_active') && !$classes) {
%   $classes .= ' invisible';
% } elsif (!stash('login_active') && $side_bar =~ /<form.*class=".*login.*".*>/i) {
%   $classes .= ' invisible';
% };

<aside tabindex="0" class="<%= $classes %>">
  <div>
    %= $side_bar
  </div>
</aside>