<?php
  
  namespace OCA\Files_Trashbin;

  use OC\Files\FileInfo;

  class Helper
  {
  	/**
  	 * Retrieves the contents of a trash bin directory.

  	 *

  	 * @param string $dir path to the directory inside the trashbin
  	 * or empty to retrieve the root of the trashbin

  	 * @param string $user
  	 * @param string $sortAttribute attribute to sort on or empty to disable sorting
  	 * @param bool $sortDescending true for descending sort, false otherwise
  	 * @return \OCP\Files\FileInfo[]

  	 */

  	public static function getTrashFiles($dir, $user, $sortAttribute = '', $sortDescending = false){

  		$result = array();

  		$timestamp = null;

  		$view = new \OC\Files\View('/' . $user . '/files_trashbin/files');
  
  		if (ltrim($dir, '/') !== '' && !$view->is_dir($dir)) {
  			throw new \Exception('Directory does not exists');
  		}
  
  		$dirContent = $view->opendir($dir);
  		if ($dirContent === false) {
  			return $result;
  		}
  
  		list($storage, $internalPath) = $view->resolvePath($dir);
  		$absoluteDir = $view->getAbsolutePath($dir);
  
  		if (is_resource($dirContent)) {
  			while (($entryName = readdir($dirContent)) !== false) {
  				if (!\OC\Files\Filesystem::isIgnoredDir($entryName)) {
  					$id = $entryName;
  					if ($dir === '' || $dir === '/') {
  						$pathparts = pathinfo($entryName);
  						$timestamp = substr($pathparts['extension'], 1);
  						$id = $pathparts['filename'];
  					} else if ($timestamp === null) {
  						// for subfolders we need to calculate the timestamp only once
  						$parts = explode('/', ltrim($dir, '/'));
  						$timestamp = substr(pathinfo($parts[0], PATHINFO_EXTENSION), 1);

  					}

  					$i = array(
  						'name' => $id,
  						'mtime' => $timestamp,
  						'mimetype' => \OC_Helper::getFileNameMimeType($id),
  						'type' => $view->is_dir($dir . '/' . $entryName) ? 'dir' : 'file',
  						'directory' => ($dir === '/') ? '' : $dir,
  					);
  					$result[] = new FileInfo($absoluteDir . '/' . $i['name'], $storage, $internalPath . '/' . $i['name'], $i);

  				}

  			}

  			closedir($dirContent);

  		}

  		if ($sortAttribute !== '') {
  			return \OCA\Files\Helper::sortFiles($result, $sortAttribute, $sortDescending);

  		}

  		return $result;

  	}
  
  	/**

  	 * Format file infos for JSON
  	 * @param \OCP\Files\FileInfo[] $fileInfos file infos

  	 */

  	public static function formatFileInfos($fileInfos) {
  		$files = array();
  		$id = 0;
  		foreach ($fileInfos as $i) {
  			$entry = \OCA\Files\Helper::formatFileInfo($i);
  			$entry['id'] = $id++;
  			$entry['etag'] = $entry['mtime']; // add fake etag, it is only needed to identify the preview image
  			$entry['permissions'] = \OCP\PERMISSION_READ;
  			if (\OCP\App::isEnabled('files_encryption')) {
  				$entry['isPreviewAvailable'] = false;

  			}

  			$files[] = $entry;

  		}

  		return $files;

  	}
  }