From 0716f96d8dafd2fd65187cf0e7bdca76e8256349 Mon Sep 17 00:00:00 2001
From: Djamil Legato <djamil@djamil.it>
Date: Wed, 9 Mar 2016 20:22:36 -0800
Subject: [PATCH] Added `json_decode` and `get_cookie` twig filters

---
 system/src/Grav/Common/Twig/TwigExtension.php | 63 +++++++++++++------
 1 file changed, 45 insertions(+), 18 deletions(-)

diff --git a/system/src/Grav/Common/Twig/TwigExtension.php b/system/src/Grav/Common/Twig/TwigExtension.php
index a385bfe17..fb37f934c 100644
--- a/system/src/Grav/Common/Twig/TwigExtension.php
+++ b/system/src/Grav/Common/Twig/TwigExtension.php
@@ -25,9 +25,9 @@ class TwigExtension extends \Twig_Extension
      */
     public function __construct()
     {
-        $this->grav = Grav::instance();
+        $this->grav     = Grav::instance();
         $this->debugger = isset($this->grav['debugger']) ? $this->grav['debugger'] : null;
-        $this->config = $this->grav['config'];
+        $this->config   = $this->grav['config'];
     }
 
     /**
@@ -85,6 +85,7 @@ class TwigExtension extends \Twig_Extension
             new \Twig_SimpleFilter('ta', [$this, 'translateArray']),
             new \Twig_SimpleFilter('truncate', ['\Grav\Common\Utils', 'truncate']),
             new \Twig_SimpleFilter('truncate_html', ['\Grav\Common\Utils', 'truncateHTML']),
+            new \Twig_SimpleFilter('json_decode', [$this, 'jsonDecodeFilter']),
         ];
     }
 
@@ -111,8 +112,8 @@ class TwigExtension extends \Twig_Extension
             new \Twig_simpleFunction('t', [$this, 'translate']),
             new \Twig_simpleFunction('ta', [$this, 'translateArray']),
             new \Twig_SimpleFunction('url', [$this, 'urlFunc']),
-
-
+            new \Twig_SimpleFunction('json_decode', [$this, 'jsonDecodeFilter']),
+            new \Twig_SimpleFunction('get_cookie', [$this, 'getCookie']),
         ];
     }
 
@@ -139,7 +140,7 @@ class TwigExtension extends \Twig_Extension
      */
     public function safeEmailFilter($str)
     {
-        $email = '';
+        $email   = '';
         $str_len = strlen($str);
         for ($i = 0; $i < $str_len; $i++) {
             $email .= "&#" . ord($str[$i]) . ";";
@@ -374,11 +375,11 @@ class TwigExtension extends \Twig_Extension
         // is it future date or past date
         if ($now > $unix_date) {
             $difference = $now - $unix_date;
-            $tense = $this->grav['language']->translate('NICETIME.AGO', null, true);
+            $tense      = $this->grav['language']->translate('NICETIME.AGO', null, true);
 
         } else {
             $difference = $unix_date - $now;
-            $tense = $this->grav['language']->translate('NICETIME.FROM_NOW', null, true);
+            $tense      = $this->grav['language']->translate('NICETIME.FROM_NOW', null, true);
         }
 
         for ($j = 0; $difference >= $lengths[$j] && $j < count($lengths) - 1; $j++) {
@@ -411,7 +412,7 @@ class TwigExtension extends \Twig_Extension
      */
     public function absoluteUrlFilter($string)
     {
-        $url = $this->grav['uri']->base();
+        $url    = $this->grav['uri']->base();
         $string = preg_replace('/((?:href|src) *= *[\'"](?!(http|ftp)))/i', "$1$url", $string);
 
         return $string;
@@ -425,7 +426,7 @@ class TwigExtension extends \Twig_Extension
      */
     public function markdownFilter($string)
     {
-        $page = $this->grav['page'];
+        $page     = $this->grav['page'];
         $defaults = $this->config->get('system.pages.markdown');
 
         // Initialize the preferred variant of Parsedown
@@ -674,16 +675,16 @@ class TwigExtension extends \Twig_Extension
      * Workaround for twig associative array initialization
      * Returns a key => val array
      *
-     * @param string $key               key of item
-     * @param string $val               value of item
-     * @param string $current_array     optional array to add to
+     * @param string $key           key of item
+     * @param string $val           value of item
+     * @param string $current_array optional array to add to
      *
      * @return array
      */
     public function arrayKeyValueFunc($key, $val, $current_array = null)
     {
         if (empty($current_array)) {
-            return array( $key => $val );
+            return array($key => $val);
         } else {
             $current_array[$key] = $val;
             return $current_array;
@@ -757,14 +758,40 @@ class TwigExtension extends \Twig_Extension
         return $string;
     }
 
+    /**
+     * Decodes string from JSON.
+     *
+     * @param  string  $str
+     * @param  bool  $assoc
+     * @param int $depth
+     * @param int $options
+     * @return array
+     */
+    public function jsonDecodeFilter($str, $assoc = false, $depth = 512, $options = 0)
+    {
+        return json_decode(html_entity_decode($str), $assoc, $depth, $options);
+    }
+
+    /**
+     * Used to retrieve a cookie value
+     *
+     * @param string $key     The cookie name to retrieve
+     *
+     * @return mixed
+     */
+    public function getCookie($key)
+    {
+        return filter_input(INPUT_COOKIE, $key, FILTER_SANITIZE_STRING);
+    }
+
     /**
      * Twig wrapper for PHP's preg_replace method
      *
-     * @param mixed $subject    the content to perform the replacement on
-     * @param mixed $pattern    the regex pattern to use for matches
-     * @param mixed $replace    the replacement value either as a string or an array of replacements
-     * @param int   $limit      the maximum possible replacements for each pattern in each subject
-
+     * @param mixed $subject the content to perform the replacement on
+     * @param mixed $pattern the regex pattern to use for matches
+     * @param mixed $replace the replacement value either as a string or an array of replacements
+     * @param int   $limit   the maximum possible replacements for each pattern in each subject
+     *
      * @return mixed the resulting content
      */
     public function regexReplace($subject, $pattern, $replace, $limit = -1)