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// Copyright (c) 2010 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_NETWORK_STATE_NOTIFIER_H_
#define CHROME_BROWSER_CHROMEOS_NETWORK_STATE_NOTIFIER_H_
#pragma once
#include "chrome/browser/chromeos/cros/network_library.h"
#include "base/singleton.h"
#include "base/task.h"
#include "base/time.h"
namespace chromeos {
// NetworkStateDetails contains the information about
// network status.
class NetworkStateDetails {
public:
enum State {
UNKNOWN = 0,
DISCONNECTED,
CONNECTING,
CONNECTED,
};
State state() const {
return state_;
}
private:
friend class NetworkStateNotifier;
explicit NetworkStateDetails(State state)
: state_(state) {
}
State state_;
DISALLOW_COPY_AND_ASSIGN(NetworkStateDetails);
};
// NetworkStateNotifier sends notification when network state has
// chagned. Notification is sent in UI thread.
// TODO(oshima): port this to other platform. merge with
// NetworkChangeNotifier if possible.
class NetworkStateNotifier : public NetworkLibrary::NetworkManagerObserver {
public:
// Returns the singleton instance of the network state notifier;
static NetworkStateNotifier* Get();
// The duration of being in offline. The value is undefined when
// when network is connected.
static base::TimeDelta GetOfflineDuration();
// Returns true if the network is connected.
static bool is_connected() {
return Get()->state_ == NetworkStateDetails::CONNECTED;
}
// NetworkLibrary::NetworkManagerObserver implementation.
virtual void OnNetworkManagerChanged(NetworkLibrary* cros);
private:
friend struct DefaultSingletonTraits<NetworkStateNotifier>;
// Retrieve the current state from libcros.
static NetworkStateDetails::State RetrieveState();
NetworkStateNotifier();
virtual ~NetworkStateNotifier();
// Update the current state and sends notification to observers.
// This should be invoked in UI thread.
void UpdateNetworkState(NetworkStateDetails::State new_state);
// A factory to post a task in UI thread.
ScopedRunnableMethodFactory<NetworkStateNotifier> task_factory_;
// The current network state.
NetworkStateDetails::State state_;
// The start time of offline.
base::Time offline_start_time_;
DISALLOW_COPY_AND_ASSIGN(NetworkStateNotifier);
};
} // namespace chromeos
#endif // CHROME_BROWSER_CHROMEOS_NETWORK_STATE_NOTIFIER_H_
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