TwigExtension - detect (in)human agent

system/src/Grav/Common/Twig/TwigExtension.php

@@ -13,6 +13,7 @@
 use Grav\Common\Markdown\Parsedown;
 use Grav\Common\Markdown\ParsedownExtra;
 use Grav\Common\Uri;
+use Grav\Common\Browser;
 use RocketTheme\Toolbox\ResourceLocator\UniformResourceLocator;
 
 class TwigExtension extends \Twig_Extension
@@ -116,6 +117,7 @@ public function getFunctions()
             new \Twig_SimpleFunction('json_decode', [$this, 'jsonDecodeFilter']),
             new \Twig_SimpleFunction('get_cookie', [$this, 'getCookie']),
             new \Twig_SimpleFunction('redirect_me', [$this, 'redirectFunc']),
+            new \Twig_SimpleFunction('ishuman', [$this, 'isHuman']),
             new \Twig_SimpleFunction('range', [$this, 'rangeFunc']),
         ];
     }
@@ -835,6 +837,17 @@ public function redirectFunc($url, $statusCode = 303)
         die();
     }
 
+    /**
+     * detect (in)humane agent
+     *
+     * @return true if human, otherwise false
+     */
+    public function isHuman()
+    {
+        $agent = new Browser;
+        return $agent->isHuman();
+    }
+
     /**
      * Generates an array containing a range of elements, optionally stepped
      *