PES-2788: uninstall may not delete tables

Author: J7F

packetery/libs/Module/Uninstaller.php

@@ -87,6 +87,10 @@ public function deleteTab($className)
      */
     private function uninstallDatabase()
     {
+        if (defined('PACKETERY_KEEP_DB_TABLES') && PACKETERY_KEEP_DB_TABLES) {
+            return true;
+        }
+
         $sql = [];
         // remove tables with payment and carrier settings, and with carriers
         $sql[] = 'DROP TABLE IF EXISTS `' . _DB_PREFIX_ . 'packetery_payment`';
@@ -140,6 +144,10 @@ private function unregisterHooks()
      */
     private function deleteConfiguration()
     {
+        if (defined('PACKETERY_KEEP_DB_TABLES') && PACKETERY_KEEP_DB_TABLES) {
+            return true;
+        }
+
         return (
             Configuration::deleteByName('PACKETERY_APIPASS') &&
             Configuration::deleteByName('PACKETERY_ESHOP_ID') &&