implement auth navbar button

src/Entity/Browser/Container/Page/Navbar.php

@@ -18,6 +18,7 @@ class Navbar
     public Page $page;
 
     // Requirements
+    public Navbar\Auth $auth;
     public Navbar\Base $base;
     public Navbar\Bookmark $bookmark;
     public Navbar\History $history;
@@ -106,12 +107,22 @@ class Navbar
             $this->bookmark->gtk
         );
 
+        // Append auth button
+        $this->auth = new Navbar\Auth(
+            $this
+        );
+
+        $this->gtk->add(
+            $this->auth->gtk
+        );
+
         // Render
         $this->gtk->show();
     }
 
     public function refresh()
     {
+        $this->auth->refresh();
         $this->base->refresh();
         $this->bookmark->refresh();
         $this->history->refresh();

src/Entity/Browser/Container/Page/Navbar/Auth.php

@@ -0,0 +1,44 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Yggverse\Yoda\Entity\Browser\Container\Page\Navbar;
+
+use \GtkButton;
+
+use \Yggverse\Yoda\Abstract\Entity\Browser\Container\Page\Navbar\Button;
+
+class Auth extends Button
+{
+    // Defaults
+    public const IMAGE = 'avatar-default-symbolic';
+    public const LABEL = 'Auth';
+    public const TOOLTIP = 'Select identity';
+
+    protected function _onCLick(
+        GtkButton $entity
+    ): void
+    {
+        // Show auth dialog
+        if ($this->navbar->page->auth->dialog())
+        {
+            // Update page
+            $this->navbar->page->update(
+                false
+            );
+        }
+    }
+
+    public function refresh(): void
+    {
+        // Activate on feature supported by request protocol
+        $this->gtk->set_sensitive(
+            boolval(
+                parse_url(
+                    $this->navbar->request->getValue(),
+                    PHP_URL_SCHEME
+                ) == 'gemini'
+            )
+        );
+    }
+}