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// Copyright 2014 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_FILE_SYSTEM_PROVIDER_PROVIDED_FILE_SYSTEM_OBSERVER_H_
#define CHROME_BROWSER_CHROMEOS_FILE_SYSTEM_PROVIDER_PROVIDED_FILE_SYSTEM_OBSERVER_H_
#include <string>
#include <vector>
#include "base/callback.h"
#include "base/files/file_path.h"
#include "chrome/browser/chromeos/file_system_provider/watcher.h"
#include "storage/browser/fileapi/watcher_manager.h"
namespace chromeos {
namespace file_system_provider {
class ProvidedFileSystemInfo;
class RequestManager;
// Observer class to be notified about changes happened to the provided file
// system, including watched entries.
class ProvidedFileSystemObserver {
public:
struct Change;
// Lust of changes.
typedef std::vector<Change> Changes;
// Describes a change related to a watched entry.
struct Change {
Change();
~Change();
base::FilePath entry_path;
storage::WatcherManager::ChangeType change_type;
};
// Called when a watched entry is changed, including removals. |callback|
// *must* be called after the entry change is handled. Once all observers
// call the callback, the tag will be updated and OnWatcherTagUpdated
// called. The reference to |changes| is valid at least as long as |callback|.
virtual void OnWatcherChanged(const ProvidedFileSystemInfo& file_system_info,
const Watcher& watcher,
storage::WatcherManager::ChangeType change_type,
const Changes& changes,
const base::Closure& callback) = 0;
// Called after the tag value is updated for the watcher.
virtual void OnWatcherTagUpdated(
const ProvidedFileSystemInfo& file_system_info,
const Watcher& watcher) = 0;
// Called after the list of watchers is changed.
virtual void OnWatcherListChanged(
const ProvidedFileSystemInfo& file_system_info,
const Watchers& watchers) = 0;
};
} // namespace file_system_provider
} // namespace chromeos
#endif // CHROME_BROWSER_CHROMEOS_FILE_SYSTEM_PROVIDER_PROVIDED_FILE_SYSTEM_OBSERVER_H_
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