<?php
  
  // fix webdav properties,add namespace in front of the property, update for OC4.5
  $installedVersion=OCP\Config::getAppValue('files', 'installed_version');
  if (version_compare($installedVersion, '1.1.6', '<')) {
  	$query = OC_DB::prepare( 'SELECT `propertyname`, `propertypath`, `userid` FROM `*PREFIX*properties`' );
  	$result = $query->execute();
  	$updateQuery = OC_DB::prepare('UPDATE `*PREFIX*properties`'
  								.' SET `propertyname` = ?'
  								.' WHERE `userid` = ?'
  								.' AND `propertypath` = ?');
  	while( $row = $result->fetchRow()) {
  		if ( $row['propertyname'][0] != '{' ) {
  			$updateQuery->execute(array('{DAV:}' + $row['propertyname'], $row['userid'], $row['propertypath']));
  		}
  	}
  }
  
  //update from OC 3
  
  //try to remove remaining files.
  //Give a warning if not possible
  
  $filesToRemove = array(
  	'ajax',
  	'appinfo',
  	'css',
  	'js',
  	'l10n',
  	'templates',
  	'admin.php',
  	'download.php',
  	'index.php',
  	'settings.php'
  );
  
  foreach($filesToRemove as $file) {
  	$filepath = OC::$SERVERROOT . '/files/' . $file;
  	if(!file_exists($filepath)) {
  		continue;
  	}
  	$success = OCP\Files::rmdirr($filepath);
  	if($success === false) {
  		//probably not sufficient privileges, give up and give a message.
  		OCP\Util::writeLog('files', 'Could not clean /files/ directory.'
  				.' Please remove everything except webdav.php from ' . OC::$SERVERROOT . '/files/', OCP\Util::ERROR);
  		break;
  	}
  }