notebook/app/views/layouts/_document_sidenav.html.erb

<ul id="document-sidenav-left" class="sidenav">
  <li class="<%= Document.color %>">
    <%= link_to main_app.documents_path, class: 'logo-container white-text' do %>
      <i class="material-icons white-text right">
        <%= Document.icon %>
      </i>
      Documents
    <% end %>
  </li>
  <li class="no-padding">
    <ul class="collapsible collapsible-accordion">
      <li>
        <%= link_to main_app.documents_path, class: 'waves-effect' do %>
          <i class="material-icons <%= Document.text_color %>">
            file_copy
          </i>
          View all documents
          <span class="badge">
            <%= @current_user_content.fetch('Document', []).count %>
          </span>
        <% end %>
      </li>
      <li>
        <%= link_to main_app.new_document_path, class: 'waves-effect' do %>
          <i class="material-icons <%= Document.text_color %>">
            note_add
          </i>
          New document
        <% end %>
      </li>

      <%
        folder = @document.folder
        if folder
      %>
        <li class="bold waves-effect">
          <a class="collapsible-header" tabindex="0">
            In this folder...
            <i class="material-icons chevron">chevron_right</i>
          </a>
          <div class="collapsible-body" style="">
            <ul>
              <li>
                <%= link_to folder, class: 'waves-effect' do %>
                  <i class="material-icons left <%= Folder.text_color %>"><%= Folder.icon %></i>
                  <%= folder.title %>
                <% end %>
              </li>
              <% Document.where(folder_id: folder.id).where.not(id: @document.id).order('updated_at DESC').each do |document| %>
                <li>
                  <%= link_to edit_document_path(document), class: 'waves-effect tooltipped', data: { tooltip: "Last edited #{time_ago_in_words document.updated_at} ago", position: 'right' } do %>
                    <i class="material-icons <%= Document.text_color %>">
                      <%= Document.icon %>
                    </i>
                    <%= document.title %>
                  <% end %>
                </li>
              <% end %>
            </ul>
          </div>
        </li>
      <% end %>

      <%
        other_folders = current_user.folders.where(context: 'Document').where.not(id: @document.folder_id).order('title ASC')
        if other_folders.any?
      %>
        <li class="bold waves-effect">
          <a class="collapsible-header" tabindex="0">
            Other folders
            <i class="material-icons chevron">chevron_right</i>
          </a>
          <div class="collapsible-body" style="">
            <ul>
              <% other_folders.each do |folder| %>
                <li>
                  <%= link_to folder, class: 'waves-effect' do %>
                    <i class="material-icons <%= Folder.text_color %>"><%= Folder.icon %></i>
                    <%= folder.title %>
                  <% end %>
                </li>
              <% end %>
            </ul>
          </div>
        </li>
      <% end %>

      <li class="bold waves-effect active">
        <a class="collapsible-header" tabindex="0">
          Recent documents
          <i class="material-icons chevron">chevron_right</i>
        </a>
        <div class="collapsible-body" style="">
          <ul>
            <% @current_user_content.fetch('Document', []).each do |document| %>
              <li>
                <%= link_to edit_document_path(document), class: 'waves-effect tooltipped', data: { tooltip: "Last edited #{time_ago_in_words document.updated_at} ago", position: 'right' } do %>
                  <i class="material-icons <%= Document.text_color %>">
                    <%= Document.icon %>
                  </i>
                  <%= document.title %>
                <% end %>
              </li>
            <% end %>
          </ul>
        </div>
      </li>
    </ul>
  </li>
</ul>