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// Copyright 2014 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CHROME_BROWSER_ASH_FILE_SYSTEM_PROVIDER_WATCHER_H_
#define CHROME_BROWSER_ASH_FILE_SYSTEM_PROVIDER_WATCHER_H_
#include <map>
#include <set>
#include <string>
#include "base/files/file_path.h"
#include "base/functional/callback.h"
#include "storage/browser/file_system/watcher_manager.h"
#include "url/gurl.h"
namespace ash::file_system_provider {
struct Watcher;
struct Subscriber;
// Key for storing a watcher in the map. There may be two watchers per path,
// as long as one is recursive, and the other one not.
struct WatcherKey {
WatcherKey(const base::FilePath& entry_path, bool recursive);
~WatcherKey();
struct Comparator {
bool operator()(const WatcherKey& a, const WatcherKey& b) const;
};
base::FilePath entry_path;
bool recursive;
};
// List of watchers.
typedef std::map<WatcherKey, Watcher, WatcherKey::Comparator> Watchers;
// Map of subscribers for notifications about a watcher.
typedef std::map<GURL, Subscriber> Subscribers;
// Represents a subscriber for notification about a watcher. There may be up to
// one subscriber per origin for the same watcher.
struct Subscriber {
Subscriber();
Subscriber(const Subscriber& other);
~Subscriber();
// Origin of the subscriber.
GURL origin;
// Whether the subscriber should be restored after shutdown or not.
bool persistent;
// Callback to be called for each watcher notification. It's optional, but
// not allowed for persistent watchers. In case of persistent subscribers,
// the notification should be handled using observers, as the callback can't
// be restored after shutdown.
storage::WatcherManager::NotificationCallback notification_callback;
};
// Represents a watcher on a file system.
struct Watcher {
Watcher();
Watcher(const Watcher& other);
~Watcher();
// Map of subscribers for notifications of the watcher.
Subscribers subscribers;
// Path of the watcher.
base::FilePath entry_path;
// Whether watching is recursive or not.
bool recursive;
// Tag of the last notification for this watcher. May be empty if not
// supported.
std::string last_tag;
};
} // namespace ash::file_system_provider
#endif // CHROME_BROWSER_ASH_FILE_SYSTEM_PROVIDER_WATCHER_H_
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