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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CHROME_BROWSER_CHROMEOS_DRIVE_STALE_CACHE_FILES_REMOVER_H_
#define CHROME_BROWSER_CHROMEOS_DRIVE_STALE_CACHE_FILES_REMOVER_H_
#include <string>
#include "base/memory/scoped_ptr.h"
#include "base/memory/weak_ptr.h"
#include "chrome/browser/chromeos/drive/drive.pb.h"
#include "chrome/browser/chromeos/drive/file_system_observer.h"
#include "chrome/browser/google_apis/gdata_errorcode.h"
namespace drive{
class FileCacheEntry;
class FileSystemInterface;
namespace internal {
class FileCache;
} // namespace internal
// This class removes stale cache files, which are present locally, but no
// longer present on the server. This can happen if files are removed from the
// server from other devices, or from the web interface.
class StaleCacheFilesRemover : public FileSystemObserver {
public:
StaleCacheFilesRemover(FileSystemInterface* file_system,
internal::FileCache* cache);
virtual ~StaleCacheFilesRemover();
private:
// Removes stale cache files.
// Gets the list of all the resource id and calls OnGetResourceIdsOfAllFiles()
// with the list.
virtual void OnInitialLoadFinished() OVERRIDE;
// Gets the file entry and calls RemoveCacheIfNecessary() with the file entry.
// This is called from StaleCacheFilesRemover::OnInitialLoadFinished.
void GetEntryInfoAndRemoveCacheIfNecessary(
const std::string& resource_id,
const FileCacheEntry& cache_entry);
// Check the cache file and removes if it is unavailable or invalid (eg. md5
// mismatch). This is called from GetCacheEntryAndRemoveCacheIfNecessary();
void RemoveCacheIfNecessary(
const std::string& resource_id,
const std::string& cache_md5,
FileError error,
const base::FilePath& drive_file_path,
scoped_ptr<ResourceEntry> entry);
internal::FileCache* cache_; // Not owned.
FileSystemInterface* file_system_; // Not owned.
// Note: This should remain the last member so it'll be destroyed and
// invalidate its weak pointers before any other members are destroyed.
base::WeakPtrFactory<StaleCacheFilesRemover> weak_ptr_factory_;
DISALLOW_COPY_AND_ASSIGN(StaleCacheFilesRemover);
};
} // namespace drive
#endif // CHROME_BROWSER_CHROMEOS_DRIVE_STALE_CACHE_FILES_REMOVER_H_
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