<?php
  /**
   * Copyright (c) 2013 Georg Ehrke georg@ownCloud.com
   * This file is licensed under the Affero General Public License version 3 or
   * later.
   * See the COPYING-README file.
   */
  \OC_Util::checkLoggedIn();
  
  if(!\OC_App::isEnabled('files_versions')){
  	exit;
  }
  
  $file = array_key_exists('file', $_GET) ? (string) urldecode($_GET['file']) : '';

  $maxX = array_key_exists('x', $_GET) ? (int) $_GET['x'] : 44;
  $maxY = array_key_exists('y', $_GET) ? (int) $_GET['y'] : 44;
  $version = array_key_exists('version', $_GET) ? $_GET['version'] : '';
  $scalingUp = array_key_exists('scalingup', $_GET) ? (bool) $_GET['scalingup'] : true;

  if($file === '' && $version === '') {
  	\OC_Response::setStatus(400); //400 Bad Request
  	\OC_Log::write('versions-preview', 'No file parameter was passed', \OC_Log::DEBUG);
  	exit;
  }
  
  if($maxX === 0 || $maxY === 0) {
  	\OC_Response::setStatus(400); //400 Bad Request
  	\OC_Log::write('versions-preview', 'x and/or y set to 0', \OC_Log::DEBUG);
  	exit;
  }

  try {
  	list($user, $file) = \OCA\Files_Versions\Storage::getUidAndFilename($file);

  	$preview = new \OC\Preview($user, 'files_versions', $file.'.v'.$version);
  	$mimetype = \OC_Helper::getFileNameMimeType($file);
  	$preview->setMimetype($mimetype);
  	$preview->setMaxX($maxX);
  	$preview->setMaxY($maxY);
  	$preview->setScalingUp($scalingUp);
  
  	$preview->showPreview();
  }catch(\Exception $e) {
  	\OC_Response::setStatus(500);
  	\OC_Log::write('core', $e->getmessage(), \OC_Log::DEBUG);
  }