simplify menu

Author: niklasbuschmann

_includes/sidebar.html

@@ -1,6 +1,26 @@
 <link rel="stylesheet" href="{{ "/assets/css/sidebar.css" | relative_url }}" media="screen and (min-width: 70em)">
 <aside style="display: none">
-  {% include menu.html menu=site.navigation text=true icon=true %}
-  {% include menu.html menu=site.external text=true icon=true %}
+  <nav>
+  {%- for item in site.navigation -%}
+    {%- assign node = site.pages | where: "name", item.file | first -%}
+    {%- assign url = item.url | default: node.url -%}
+    {%- assign title = item.title | default: node.title -%}
+    {%- assign icon = item.icon | default: item.sidebaricon -%}
+    <a aria-label="{{ title }}" href="{{ url | relative_url }}" {% if url == page.url %}class="selected"{% endif %}>
+      <svg aria-hidden="true" class="icon"><use xlink:href="{{ "/assets/fontawesome/icons.svg" | relative_url }}#{{ icon }}"></use></svg>
+      <span aria-hidden="true">{{ title }}</span>
+    </a>
+  {%- endfor -%}
+  {%- for item in site.external -%}
+    {%- assign node = site.pages | where: "name", item.file | first -%}
+    {%- assign url = item.url | default: node.url -%}
+    {%- assign title = item.title | default: node.title -%}
+    {%- assign icon = item.icon | default: item.sidebaricon -%}
+    <a aria-label="{{ title }}" href="{{ url | relative_url }}" {% if url == page.url %}class="selected"{% endif %}>
+      <svg aria-hidden="true" class="icon"><use xlink:href="{{ "/assets/fontawesome/icons.svg" | relative_url }}#{{ icon }}"></use></svg>
+      <span aria-hidden="true">{{ title }}</span>
+    </a>
+  {%- endfor -%}
+  </nav>
   <div class="description">{{ site.description }}</div>
 </aside>