From fa50ae93673b796d7d9a976aec3a9f803c8ddf4b Mon Sep 17 00:00:00 2001
From: Matias Griese <matias@kunena.org>
Date: Tue, 15 Mar 2016 14:37:40 +0200
Subject: [PATCH] Add yaml validation

---
 system/src/Grav/Common/Data/Validation.php | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/system/src/Grav/Common/Data/Validation.php b/system/src/Grav/Common/Data/Validation.php
index 270363ebc..5edd8db77 100644
--- a/system/src/Grav/Common/Data/Validation.php
+++ b/system/src/Grav/Common/Data/Validation.php
@@ -4,6 +4,7 @@ namespace Grav\Common\Data;
 use Grav\Common\Grav;
 use Symfony\Component\Yaml\Exception\ParseException;
 use Symfony\Component\Yaml\Parser;
+use Symfony\Component\Yaml\Yaml;
 
 /**
  * Data validation.
@@ -624,6 +625,25 @@ class Validation
         return (array) $value;
     }
 
+    public static function typeYaml($value, $params)
+    {
+        try {
+            Yaml::parse($value);
+            return true;
+        } catch (ParseException $e) {
+            return false;
+        }
+    }
+
+    public static function filterYaml($value, $params)
+    {
+        try {
+            return (array) Yaml::parse($value);
+        } catch (ParseException $e) {
+            return null;
+        }
+    }
+
     /**
      * Custom input: ignore (will not validate)
      *