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// Copyright 2022 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CHROMEOS_ASH_COMPONENTS_NETWORK_HOTSPOT_STATE_HANDLER_H_
#define CHROMEOS_ASH_COMPONENTS_NETWORK_HOTSPOT_STATE_HANDLER_H_
#include <memory>
#include <optional>
#include <vector>
#include "base/component_export.h"
#include "base/memory/weak_ptr.h"
#include "base/observer_list.h"
#include "base/scoped_observation.h"
#include "base/values.h"
#include "chromeos/ash/components/dbus/shill/shill_property_changed_observer.h"
#include "chromeos/ash/components/login/login_state/login_state.h"
#include "chromeos/ash/services/hotspot_config/public/mojom/cros_hotspot_config.mojom.h"
namespace ash {
// This class caches hotspot related status and implements methods to get
// current state and active client count.
class COMPONENT_EXPORT(CHROMEOS_NETWORK) HotspotStateHandler
: public ShillPropertyChangedObserver {
public:
class Observer : public base::CheckedObserver {
public:
~Observer() override = default;
// Invoked when hotspot state, active client count or hotspot config is
// changed.
virtual void OnHotspotStatusChanged() = 0;
};
HotspotStateHandler();
HotspotStateHandler(const HotspotStateHandler&) = delete;
HotspotStateHandler& operator=(const HotspotStateHandler&) = delete;
~HotspotStateHandler() override;
void Init();
// Return the latest hotspot state
const hotspot_config::mojom::HotspotState& GetHotspotState() const;
// Returns the reason for hotspot being disabled. nullopt is returned when the
// disable reason isn't set
const std::optional<hotspot_config::mojom::DisableReason> GetDisableReason()
const;
// Return the latest hotspot active client count
size_t GetHotspotActiveClientCount() const;
void AddObserver(Observer* observer);
void RemoveObserver(Observer* observer);
bool HasObserver(Observer* observer) const;
private:
// Stores the count of the active client and enables the system wake lock when
// the count is not 0.
class ActiveClientCount {
public:
ActiveClientCount();
~ActiveClientCount();
// Setter/getter method for the active client count.
void Set(size_t value);
size_t Get() const;
private:
// Enables/Disables the system wake lock.
void EnableWakeLock();
void DisableWakeLock();
// The value of the active client count.
size_t value_ = 0;
// The wake lock id. It has values if and only if the wake lock is enabled.
std::optional<int> wake_lock_id_ = std::nullopt;
};
// ShillPropertyChangedObserver overrides
void OnPropertyChanged(const std::string& key,
const base::Value& value) override;
// Callback to handle the manager properties with hotspot related properties.
void OnManagerProperties(std::optional<base::Value::Dict> properties);
// Update the cached hotspot_state_ and active_client_count_ from hotspot
// status in Shill.
void UpdateHotspotStatus(const base::Value::Dict& status);
// Updates the reason for hotspot getting disabled and notifies observers.
void UpdateDisableReason(const base::Value::Dict& status);
// Notify observers that hotspot state or active client count was changed.
void NotifyHotspotStatusChanged();
hotspot_config::mojom::HotspotState hotspot_state_ =
hotspot_config::mojom::HotspotState::kDisabled;
std::optional<hotspot_config::mojom::DisableReason> disable_reason_ =
std::nullopt;
ActiveClientCount active_client_count_;
base::ObserverList<Observer> observer_list_;
base::WeakPtrFactory<HotspotStateHandler> weak_ptr_factory_{this};
};
} // namespace ash
#endif // CHROMEOS_ASH_COMPONENTS_NETWORK_HOTSPOT_STATE_HANDLER_H_
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