From 1f42ed54c2ab07608302a26cc2e97a4f9ae7e324 Mon Sep 17 00:00:00 2001
From: Marc Egger <marc.egger@uzh.ch>
Date: Mon, 9 Sep 2019 15:36:24 +0200
Subject: [PATCH] add json decode filter to twig

---
 Documentation/Manual.rst                 | 13 +++++++++++++
 extension/Classes/Core/Report/Report.php |  7 +++++++
 2 files changed, 20 insertions(+)

diff --git a/Documentation/Manual.rst b/Documentation/Manual.rst
index cfb8d734..ec82c20a 100644
--- a/Documentation/Manual.rst
+++ b/Documentation/Manual.rst
@@ -5450,6 +5450,19 @@ using the `qfqlink` filter::
 
 will render a link to *http://www.example.com*.
 
+Json Decode
+^^^^^^^^^^^
+A String can be JSON decoded in Twig the following way::
+
+  {% set decoded = '["this is one", "this is two"]' | json_decode%}
+
+This can then be used as a normal object in Twig::
+
+  {{ decoded[0] }}
+
+will render *this is one*.
+
+
 Available Store Variables
 ^^^^^^^^^^^^^^^^^^^^^^^^^
 
diff --git a/extension/Classes/Core/Report/Report.php b/extension/Classes/Core/Report/Report.php
index 784bf749..4fa4bacd 100644
--- a/extension/Classes/Core/Report/Report.php
+++ b/extension/Classes/Core/Report/Report.php
@@ -712,6 +712,13 @@ class Report {
         }, ['is_safe' => ['html']]);
         $twig->addFilter($filter);
 
+        // Json decode Filter
+        // E.g.: {% set obj = '["this is one", "this is two"]' | json_decode%}
+        $filter = new \Twig\TwigFilter('json_decode', function ($string) {
+            return json_decode($string);
+        }, ['is_safe' => ['html']]);
+        $twig->addFilter($filter);
+
         // render Twig
         $contentTwig = $twig->render($twig_template, array(
             'context' => $resultAssoc,  // backward compatibility for MNF
-- 
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