<?php
  
  $installedVersion=OCP\Config::getAppValue('files_versions', 'installed_version');
  // move versions to new directory
  if (version_compare($installedVersion, '1.0.2', '<')) {
  	$users = \OCP\User::getUsers();
  	$datadir =  \OCP\Config::getSystemValue('datadirectory').'/';
  	foreach ($users as $user) {
  		$oldPath = $datadir.$user.'/versions';
  		$newPath = $datadir.$user.'/files_versions';
  		if(is_dir($oldPath)) {
  			rename($oldPath, $newPath);
  		}
  	}
  }