Added 'previous directory (..)' link for navigating up a single directory

app/Controllers/DirectoryController.php

@@ -42,6 +42,7 @@ class DirectoryController
         return $this->view->render($response, 'index.twig', [
             'breadcrumbs' => $this->breadcrumbs($path),
             'files' => $files->in($path),
+            'is_root' => $this->isRoot($path),
         ]);
     }
 
@@ -64,4 +65,16 @@ class DirectoryController
             return $carry;
         }, []);
     }
+
+    /**
+     * Undocumented function.
+     *
+     * @param string $path
+     *
+     * @return bool
+     */
+    protected function isRoot(string $path): bool
+    {
+        return realpath($path) === realpath($this->config->get('app.root'));
+    }
 }

app/themes/default/index.twig

@@ -33,6 +33,29 @@
                 </div>
             </div>
 
+            {% if not is_root %}
+                <a
+                    href=".."
+                    class="flex justify-between items-center rounded-lg p-4 hover:bg-gray-200 hover:p-4 hover:shadow"
+                >
+                    <div class="flex-shrink text-gray-700 pr-2">
+                        <i class="fas fa-level-up-alt fa-fw fa-lg"></i>
+                    </div>
+
+                    <div class="flex-grow truncate mr-2">
+                        ..
+                    </div>
+
+                    <div class="hidden whitespace-no-wrap text-right mx-2 w-1/6 sm:block">
+                        —
+                    </div>
+
+                    <div class="hidden whitespace-no-wrap text-right truncate ml-2 w-1/4 sm:block">
+                        —
+                    </div>
+                </a>
+            {% endif %}
+
             {% for file in files %}
                 <a
                     href="{{ file.getRelativePathname }}"

index.php

@@ -29,6 +29,9 @@ $container->set(Twig::class, function (Config $config) {
 });
 
 /** Configure the application components */
+$container->call(function (Config $config) {
+    $config->set('app.root', __DIR__);
+});
 $container->call(FilesComposer::class);
 $container->call(ViewComposer::class);