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// Copyright 2013 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_GEOLOCATION_HANDLER_H_
#define CHROMEOS_ASH_COMPONENTS_NETWORK_GEOLOCATION_HANDLER_H_
#include <stdint.h>
#include <optional>
#include "base/memory/weak_ptr.h"
#include "base/time/time.h"
#include "base/values.h"
#include "chromeos/ash/components/dbus/shill/shill_property_changed_observer.h"
#include "chromeos/ash/components/network/network_handler.h"
#include "chromeos/ash/components/network/network_util.h"
namespace ash {
// This class provides Shill Wifi Access Point and Cell Tower data. It
// currently relies on polling because that is the usage model in
// content::WifiDataProvider. This class requests data asynchronously,
// returning the most recent available data. A typical usage pattern,
// assuming a wifi device is enabled, is:
// Initialize(); // Makes an initial request
// GetWifiAccessPoints(); // returns true + inital data, requests update
// (Delay some amount of time, ~10s)
// GetWifiAccessPoints(); // returns true + updated data, requests update
// (Delay some amount of time after data changed, ~10s)
// GetWifiAccessPoints(); // returns true + same data, requests update
// (Delay some amount of time after data did not change, ~2 mins)
class COMPONENT_EXPORT(CHROMEOS_NETWORK) GeolocationHandler
: public ShillPropertyChangedObserver {
public:
GeolocationHandler(const GeolocationHandler&) = delete;
GeolocationHandler& operator=(const GeolocationHandler&) = delete;
~GeolocationHandler() override;
// This sends a request for geolocation (both wifi AP and cell tower) data.
// If AP data is already available, fills |access_points| with the latest
// access point data, and similarly for cell tower data and |cell_towers|.
// Returns |true| if either type of data is already available upon call.
bool GetNetworkInformation(WifiAccessPointVector* access_points,
CellTowerVector* cell_towers);
// This sends a request for geolocation (both wifi AP and cell tower) data.
// If wifi data is already available, returns |true|, fills |access_points|
// with the latest access point data, and sets |age_ms| to the time
// since the last update in MS.
bool GetWifiAccessPoints(WifiAccessPointVector* access_points,
int64_t* age_ms);
bool wifi_enabled() const { return wifi_enabled_; }
// ShillPropertyChangedObserver overrides
void OnPropertyChanged(const std::string& key,
const base::Value& value) override;
private:
friend class NetworkHandler;
friend class GeolocationHandlerTest;
friend class SimpleGeolocationWirelessTest;
GeolocationHandler();
void Init();
// ShillManagerClient callback
void ManagerPropertiesCallback(std::optional<base::Value::Dict> properties);
// Called from OnPropertyChanged or ManagerPropertiesCallback.
void HandlePropertyChanged(const std::string& key, const base::Value& value);
// Asynchronously request geolocation objects (wifi access points and
// cell towers) from Shill.Manager.
void RequestGeolocationObjects();
// Callback for receiving Geolocation data.
void GeolocationCallback(std::optional<base::Value::Dict> properties);
bool cellular_enabled_ = false;
bool wifi_enabled_ = false;
void AddCellTowerFromDict(const base::Value::Dict& entry);
void AddAccessPointFromDict(const base::Value::Dict& entry);
// Cached network information and update time
WifiAccessPointVector wifi_access_points_;
CellTowerVector cell_towers_;
base::Time geolocation_received_time_;
// For Shill client callbacks
base::WeakPtrFactory<GeolocationHandler> weak_ptr_factory_{this};
};
} // namespace ash
#endif // CHROMEOS_ASH_COMPONENTS_NETWORK_GEOLOCATION_HANDLER_H_
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