* initial commit

src/App/Plates/NavigationExtensionFactory.php

@@ -0,0 +1,26 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Plates;
+
+use Psr\Container\ContainerInterface;
+use Zend\Expressive\Plates\Exception\MissingHelperException;
+use Zend\Expressive\Router\RouterInterface;
+
+class NavigationExtensionFactory
+{
+    public function __invoke(ContainerInterface $container) : NavigationExtension
+    {
+        if (! $container->has(RouterInterface::class)) {
+            throw new MissingHelperException(sprintf(
+                '%s requires that the %s service be present; not found',
+                NavigationExtension::class,
+                RouterInterface::class
+            ));
+        }
+
+        $router = $container->get(RouterInterface::class);
+        return new NavigationExtension($router);
+    }
+}