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// 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:
~GeolocationHandler() override;
// 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
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_
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