Update uninstall.php

uninstall.php

@@ -0,0 +1,37 @@
+<?php
+
+/** @var rex_addon $this */
+
+// update config
+// remove additional config from base config
+$config = array_diff_recursive(
+    rex_file::getConfig($this->getPath('package.yml')),
+    rex_file::getConfig($this->getPath('package.setup.yml'))
+);
+
+rex_file::putConfig($this->getPath('package.yml'), $config);
+
+
+// Computes the difference of two arrays recursively
+// https://gist.github.com/t3chnik/6b3b14d3859d810c02f4
+function array_diff_recursive($aArray1, $aArray2)
+{
+    $aReturn = array();
+    foreach ($aArray1 as $mKey => $mValue) {
+        if (array_key_exists($mKey, $aArray2)) {
+            if (is_array($mValue)) {
+                $aRecursiveDiff = array_diff_recursive($mValue, $aArray2[$mKey]);
+                if (count($aRecursiveDiff)) {
+                    $aReturn[$mKey] = $aRecursiveDiff;
+                }
+            } else {
+                if ($mValue != $aArray2[$mKey]) {
+                    $aReturn[$mKey] = $mValue;
+                }
+            }
+        } else {
+            $aReturn[$mKey] = $mValue;
+        }
+    }
+    return $aReturn;
+}