| // Copyright (c) 2013 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 CHROMEOS_NETWORK_GEOLOCATION_HANDLER_H_ |
| #define CHROMEOS_NETWORK_GEOLOCATION_HANDLER_H_ |
| |
| #include "base/memory/weak_ptr.h" |
| #include "base/time/time.h" |
| #include "chromeos/dbus/dbus_method_call_status.h" |
| #include "chromeos/dbus/shill_property_changed_observer.h" |
| #include "chromeos/network/network_handler.h" |
| #include "chromeos/network/network_util.h" |
| |
| namespace base { |
| class DictionaryValue; |
| } |
| |
| namespace chromeos { |
| |
| // This class provices Shill Wifi Access Point 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 CHROMEOS_EXPORT GeolocationHandler : public ShillPropertyChangedObserver { |
| public: |
| virtual ~GeolocationHandler(); |
| |
| // This sends a request for wifi access point data. If 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* age_ms); |
| |
| bool wifi_enabled() const { return wifi_enabled_; } |
| |
| // ShillPropertyChangedObserver overrides |
| virtual void OnPropertyChanged(const std::string& key, |
| const base::Value& value) override; |
| |
| private: |
| friend class NetworkHandler; |
| friend class GeolocationHandlerTest; |
| GeolocationHandler(); |
| |
| void Init(); |
| |
| // ShillManagerClient callback |
| void ManagerPropertiesCallback(DBusMethodCallStatus call_status, |
| const base::DictionaryValue& properties); |
| |
| // Called from OnPropertyChanged or ManagerPropertiesCallback. |
| void HandlePropertyChanged(const std::string& key, const base::Value& value); |
| |
| // Asynchronously request wifi access points from Shill.Manager. |
| void RequestWifiAccessPoints(); |
| |
| // Callback for receiving Geolocation data. |
| void GeolocationCallback(DBusMethodCallStatus call_status, |
| const base::DictionaryValue& properties); |
| |
| // Wifi enabled state |
| bool wifi_enabled_; |
| |
| // Cached wifi access points and update time |
| WifiAccessPointVector wifi_access_points_; |
| base::Time geolocation_received_time_; |
| |
| // For Shill client callbacks |
| base::WeakPtrFactory<GeolocationHandler> weak_ptr_factory_; |
| |
| DISALLOW_COPY_AND_ASSIGN(GeolocationHandler); |
| }; |
| |
| } // namespace chromeos |
| |
| #endif // CHROMEOS_NETWORK_GEOLOCATION_HANDLER_H_ |