rename form backup directory and backup file name pattern

extension/Classes/Core/Form/FormAsFile.php

@@ -779,12 +779,12 @@ class FormAsFile
             }
         }
 
-        $cwdToBackupFile = Path::join($cwdToBackup, $formName . '.' . date('Y-m-d_H-i-s') . ".$tag.json");
+        $cwdToBackupFile = Path::join($cwdToBackup, $formName . '.json.' . date('Y-m-d_H-i-s') . ".$tag");
 
         // add index to filename if backup file with current timestamp already exists
         $index = 1;
         while (file_exists($cwdToBackupFile)) {
-            $cwdToBackupFile = Path::join($cwdToBackup, $formName . '.' . date('Y-m-d_H-i-s') . ".$index.$tag.json");
+            $cwdToBackupFile = Path::join($cwdToBackup, $formName . '.json.' . date('Y-m-d_H-i-s') . ".$index.$tag");
             $index ++;
             if ($index > 20) {
                 Thrower::userFormException('Error while trying to backup form file.', 'Infinite loop.');

extension/Classes/Core/Helper/Path.php

@@ -57,9 +57,9 @@ class Path
     private const APP_TO_PROJECT_IN_PROTECTED = 'fileadmin/protected/qfqProject';
     const PROJECT_TO_FORM = 'form';
     const PROJECT_TO_CONF = 'conf';
-    const FORM_TO_FORM_BACKUP = '_backup';
+    const FORM_TO_FORM_BACKUP = '.backup';
     const PROJECT_DIR_TO_REPORT = 'report'; // TODO: refactor: remove DIR from constant name
-    const REPORT_FILE_TO_BACKUP = '_backup'; // The path from a directory containing a report file to the directory containing backups of that report file
+    const REPORT_FILE_TO_BACKUP = '.backup'; // The path from a directory containing a report file to the directory containing backups of that report file
 
     // Config
     const APP_TO_TYPO3_CONF = 'typo3conf';

extension/Classes/Core/Report/ReportAsFile.php

@@ -215,14 +215,14 @@ class ReportAsFile
             }
         }
 
-        $cwdToBackupFile = Path::join($cwdToBackup, basename($cwdToReportFile, REPORT_FILE_EXTENSION) . '.' . date('Y-m-d_H-i-s') . ".json");
+        $cwdToBackupFile = Path::join($cwdToBackup, basename($cwdToReportFile, REPORT_FILE_EXTENSION) . REPORT_FILE_EXTENSION . '.' . date('Y-m-d_H-i-s'));
 
         // add index to filename if backup file with current timestamp already exists
         $index = 1;
         while (file_exists($cwdToBackupFile)) {
-            $cwdToBackupFile = Path::join($cwdToBackup, basename($cwdToReportFile, REPORT_FILE_EXTENSION) . '.' . date('Y-m-d_H-i-s') . ".$index.json");
+            $cwdToBackupFile = Path::join($cwdToBackup, basename($cwdToReportFile, REPORT_FILE_EXTENSION) . REPORT_FILE_EXTENSION . '.' . date('Y-m-d_H-i-s') . ".$index");
             $index ++;
-            if ($index > 100) {
+            if ($index > 20) {
                 Thrower::userFormException('Error while trying to backup report file.', 'Infinite loop.');
             }
         }