Add menu with other case blog posts

themes/chosto/layouts/posts/single.html

@@ -16,6 +16,28 @@
     {{ end }}
     </div>
 </aside>
+<!--
+If the current blog post belongs to a case, we will add a side menu
+with all other blog posts belonging to that case, emphasis to the current.
+-->
+{{ with .CurrentSection.Params.Title }}
+<aside class="menu" id="case">
+  <p class="menu-label">
+    Dans le dossier « {{ . }} »...
+  </p>
+  <ul class="menu-list">
+    {{ $posts := (where $.Site.RegularPages "CurrentSection.Params.Code" "==" $.CurrentSection.Params.Code )}}
+    {{ $postsSorted := (sort $posts "Date" )}}
+    {{ range $postsSorted }}
+      <li><a
+      {{ if eq $.Title .Title }}
+        class="is-active"
+      {{ end }}
+      href="{{ .Permalink }}">{{ .Title }}</a></li>
+    {{ end }}
+  </ul>
+</aside>
+{{ end }}
 <section id="main">
   <h1 id="title">{{ .Title }}</h1>
   <div>