From 258d7473bc5eb82aed55b44d7d98c4cdf3b3d3f0 Mon Sep 17 00:00:00 2001
From: Matias Griese <matias@trilbymedia.com>
Date: Fri, 1 Apr 2022 21:52:26 +0300
Subject: [PATCH] Added `has_env()` twig function to test if environmental
 variable is defined

---
 CHANGELOG.md                                           |  1 +
 .../src/Grav/Common/Twig/Extension/GravExtension.php   | 10 ++++++++++
 2 files changed, 11 insertions(+)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index c57d40dab..6a909f3fc 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,7 @@
 1. [](#new)
     * Added `FileInterface::touch()` method
     * Added optional `$field` parameter to `FlexMediaTrait::deleteMediaFile()` method
+    * Added `has_env()` twig function to test if environmental variable is defined
 2. [](#improved)
     * By default, add media to only pages which have been initialized in pages loop
 3. [](#bugfix)
diff --git a/system/src/Grav/Common/Twig/Extension/GravExtension.php b/system/src/Grav/Common/Twig/Extension/GravExtension.php
index a2a76b317..b870a9221 100644
--- a/system/src/Grav/Common/Twig/Extension/GravExtension.php
+++ b/system/src/Grav/Common/Twig/Extension/GravExtension.php
@@ -222,6 +222,7 @@ class GravExtension extends AbstractExtension implements GlobalsInterface
             new TwigFunction('svg_image', [$this, 'svgImageFunction']),
             new TwigFunction('xss', [$this, 'xssFunc']),
             new TwigFunction('unique_id', [$this, 'uniqueId']),
+            new TwigFunction('has_env', [$this, 'hasEnv']),
 
             // Translations
             new TwigFunction('t', [$this, 'translate'], ['needs_environment' => true]),
@@ -707,6 +708,15 @@ class GravExtension extends AbstractExtension implements GlobalsInterface
         return Utils::uniqueId($length, $options);
     }
 
+    /**
+     * @param $string
+     * @return bool
+     */
+    public function hasEnv($string): bool
+    {
+        return is_string($string) && getenv($string) !== false;
+    }
+
     /**
      * @param string $string
      * @return string