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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_GEOLOCATION_NETWORK_LOCATION_PROVIDER_H_
#define CHROME_BROWSER_GEOLOCATION_NETWORK_LOCATION_PROVIDER_H_
#include <string>
#include "base/basictypes.h"
#include "base/lock.h"
#include "base/string16.h"
#include "base/thread.h"
#include "chrome/browser/geolocation/device_data_provider.h"
#include "chrome/browser/geolocation/geoposition.h"
#include "chrome/browser/geolocation/location_provider.h"
#include "chrome/browser/geolocation/network_location_request.h"
class URLFetcherProtectEntry;
class NetworkLocationProvider
: public LocationProviderBase,
public RadioDataProvider::ListenerInterface,
public WifiDataProvider::ListenerInterface,
public NetworkLocationRequest::ListenerInterface {
public:
NetworkLocationProvider(AccessTokenStore* access_token_store,
URLRequestContextGetter* context,
const GURL& url,
const string16& host_name);
virtual ~NetworkLocationProvider();
// LocationProviderBase implementation
virtual bool StartProvider();
virtual void GetPosition(Position *position);
virtual void UpdatePosition();
private:
// PositionCache is an implementation detail of NetworkLocationProvider.
class PositionCache;
// Satisfies a position request from cache or network.
void RequestPosition();
// Internal helper used by DeviceDataUpdateAvailable
void OnDeviceDataUpdated();
// DeviceDataProvider::ListenerInterface implementation.
virtual void DeviceDataUpdateAvailable(RadioDataProvider* provider);
virtual void DeviceDataUpdateAvailable(WifiDataProvider* provider);
// NetworkLocationRequest::ListenerInterface implementation.
virtual void LocationResponseAvailable(const Position& position,
bool server_error,
const string16& access_token);
scoped_refptr<AccessTokenStore> access_token_store_;
// The device data providers, acquired via global factories.
RadioDataProvider* radio_data_provider_;
WifiDataProvider* wifi_data_provider_;
// The radio and wifi data, flags to indicate if each data set is complete,
// and their guarding mutex.
RadioData radio_data_;
WifiData wifi_data_;
bool is_radio_data_complete_;
bool is_wifi_data_complete_;
Lock data_mutex_;
// The timestamp for the latest device data update.
int64 device_data_updated_timestamp_;
string16 access_token_;
// The current best position estimate and its guarding mutex
Position position_;
Lock position_mutex_;
bool is_new_data_available_;
// The network location request object, and the url it uses.
scoped_ptr<NetworkLocationRequest> request_;
ScopedRunnableMethodFactory<NetworkLocationProvider> delayed_start_task_;
// The cache of positions.
scoped_ptr<PositionCache> position_cache_;
DISALLOW_COPY_AND_ASSIGN(NetworkLocationProvider);
};
#endif // CHROME_BROWSER_GEOLOCATION_NETWORK_LOCATION_PROVIDER_H_
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