scanner.php

<?php
/**
 * Copyright (c) 2012 Robin Appelman <icewind@owncloud.com>
 * This file is licensed under the Affero General Public License version 3 or
 * later.
 * See the COPYING-README file.
 */

namespace OC\Files\Cache;

class Scanner {
	/**
	 * @var \OC\Files\Storage\Storage $storage
	 */
	private $storage;

	/**
	 * @var string $storageId
	 */
	private $storageId;

	/**
	 * @var \OC\Files\Cache\Cache $cache
	 */
	private $cache;

	const SCAN_RECURSIVE = true;
	const SCAN_SHALLOW = false;

	public function __construct(\OC\Files\Storage\Storage $storage) {
		$this->storage = $storage;
		$this->storageId = $this->storage->getId();
		$this->cache = $storage->getCache();
	}

	/**
	 * get all the metadata of a file or folder
	 * *
	 *
	 * @param string $path
	 * @return array with metadata of the file
	 */
	public function getData($path) {
		$data = array();
		if (!$this->storage->isReadable($path)) return null; //cant read, nothing we can do
		$data['mimetype'] = $this->storage->getMimeType($path);
		$data['mtime'] = $this->storage->filemtime($path);
		if ($data['mimetype'] == 'httpd/unix-directory') {
			$data['size'] = -1; //unknown
		} else {
			$data['size'] = $this->storage->filesize($path);
		}
		$data['etag'] = $this->storage->getETag($path);
		return $data;
	}

	/**
	 * scan a single file and store it in the cache
	 *
	 * @param string $file
	 * @param bool $checkExisting check existing folder sizes in the cache instead of always using -1 for folder size
	 * @return array with metadata of the scanned file
	 */
	public function scanFile($file, $checkExisting = false) {
		\OC_Hook::emit('\OC\Files\Cache\Scanner', 'scan_file', array('path' => $file, 'storage' => $this->storageId));
		$data = $this->getData($file);
		if ($data) {
			if ($file) {
				$parent = dirname($file);
				if ($parent === '.') {