astuto/app/views/layouts/_header.html.erb

<nav class="header">
  <div class="container">
    <%=
      link_to root_path, class: 'brand' do
        app_name = content_tag :span, Rails.application.name
        logo = image_tag(asset_pack_path('media/images/logo.png'), class: 'logo')

        Rails.application.show_logo? ? logo + app_name : app_name
      end
    %>

    <button
      class="navbarToggler"
      type="button"
      data-toggle="collapse"
      data-target="#navbarSupportedContent"
      aria-controls="navbarSupportedContent"
      aria-expanded="false"
      aria-label="Toggle navigation"
    >
      <span class="navbar-toggler-icon"></span>
    </button>

    <div class="collapse navbar-collapse" id="navbarSupportedContent">
      <ul class="boardsNav">
        <%= render 'layouts/boards_nav_section', boards: @boards unless @boards.nil? %>
      </ul>

      <ul class="profileNav">
        <% if user_signed_in? %>
          <li class="nav-item dropdown">
            <a class="profileToggle" href="#" id="navbarDropdown" role="button" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
              <%= image_tag(current_user.gravatar_url, class: 'gravatar', alt: current_user.full_name, size: 24) %>
              <span class="fullname"><%= current_user.full_name %></span>
            </a>
            <div class="dropdown-menu" aria-labelledby="navbarDropdown">
              <% if current_user.power_user? %>
                <%=
                  link_to t('header.menu.site_settings'),
                    current_user.admin? ? site_settings_boards_path : site_settings_users_path,
                    class: 'dropdown-item'
                %>
                <div class="dropdown-divider"></div>
              <% end %>

              <%= link_to t('header.menu.profile_settings'), edit_user_registration_path, class: 'dropdown-item' %>
              <div class="dropdown-divider"></div>

              <%= link_to t('header.menu.sign_out'), destroy_user_session_path, method: :delete, class: 'dropdown-item' %>
            </div>
          </li>
        <% else %>
          <li class="nav-item">
            <%= link_to t('header.log_in'), new_user_session_path, class: 'nav-link' %>
          </li>
        <% end %>
      </ul>
    </div>
  </div>
</nav>