Generate parent directory link instead of using '..'

app/Providers/TwigProvider.php

@@ -19,6 +19,7 @@ class TwigProvider
         ViewFunctions\Config::class,
         ViewFunctions\Icon::class,
         ViewFunctions\Markdown::class,
+        ViewFunctions\ParentDir::class,
         ViewFunctions\SizeForHumans::class,
     ];
 

app/ViewFunctions/ParentDir.php

@@ -0,0 +1,25 @@
+<?php
+
+namespace App\ViewFunctions;
+
+use Tightenco\Collect\Support\Collection;
+
+class ParentDir extends ViewFunction
+{
+    /** @var string The function name */
+    protected $name = 'parent_dir';
+
+    /**
+     * Get the parent directory for a given path.
+     *
+     * @param string $path
+     *
+     * @return string
+     */
+    public function __invoke(string $path)
+    {
+        return Collection::make(
+            explode('/', $path)
+        )->filter()->slice(0, -1)->implode('/');
+    }
+}

app/resources/views/components/file.twig

@@ -1,5 +1,5 @@
 <a
-    href="{{ parentDir ? '..' : file.getRelativePathname }}"
+    href="/{{ parentDir ? parent_dir(path) : file.getPathname }}"
     class="flex flex-col items-center rounded-lg font-mono group hover:bg-gray-200 hover:shadow"
 >
     <div class="flex justify-between items-center p-4 w-full">

app/resources/views/index.twig

@@ -20,9 +20,7 @@
             </div>
 
             {% if not search and not is_root %}
-                {{ include('components/file.twig', {
-                    parentDir: true
-                }, with_context = false) }}
+                {{ include('components/file.twig', { parentDir: true }) }}
             {% endif %}
 
             {% for file in files %}

tests/ViewFunctions/ParentTest.php

@@ -0,0 +1,16 @@
+<?php
+
+namespace Tests\ViewFunctions;
+
+use App\ViewFunctions\ParentDir;
+use Tests\TestCase;
+
+class ParentDirTest extends TestCase
+{
+    public function test_it_can_get_the_parent_directory_from_a_path(): void
+    {
+        $parentDir = new ParentDir($this->container, $this->config);
+
+        $this->assertEquals('foo/bar', $parentDir('foo/bar/baz'));
+    }
+}