<?php
  
  /**
   * ownCloud
   *
   * @author Vincent Petry
   * @copyright 2014 Vincent Petry <pvince81@owncloud.com>
   *
   * @license AGPL3
   */

  class OC_Connector_Sabre_ExceptionLoggerPlugin extends \Sabre\DAV\ServerPlugin

  {

  	private $nonFatalExceptions = array(
  		'Sabre\DAV\Exception\NotAuthenticated' => true,
  		// the sync client uses this to find out whether files exist,
  		// so it is not always an error, log it as debug
  		'Sabre\DAV\Exception\NotFound' => true,
  		// this one mostly happens when the same file is uploaded at
  		// exactly the same time from two clients, only one client
  		// wins, the second one gets "Precondition failed"
  		'Sabre\DAV\Exception\PreconditionFailed' => true,
  	);

  	private $appName;
  
  	/**
  	 * @param string $loggerAppName app name to use when logging
  	 */
  	public function __construct($loggerAppName = 'webdav') {
  		$this->appName = $loggerAppName;
  	}
  
  	/**
  	 * This initializes the plugin.
  	 *

  	 * This function is called by \Sabre\DAV\Server, after

  	 * addPlugin is called.
  	 *
  	 * This method should set up the required event subscriptions.
  	 *

  	 * @param \Sabre\DAV\Server $server

  	 * @return void
  	 */

  	public function initialize(\Sabre\DAV\Server $server) {

  
  		$server->subscribeEvent('exception', array($this, 'logException'), 10);
  	}
  
  	/**
  	 * Log exception
  	 *
  	 * @internal param Exception $e exception
  	 */
  	public function logException($e) {
  		$exceptionClass = get_class($e);

  		$level = \OCP\Util::FATAL;
  		if (isset($this->nonFatalExceptions[$exceptionClass])) {
  			$level = \OCP\Util::DEBUG;

  		}

  		\OCP\Util::logException($this->appName, $e, $level);

  	}
  }