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// Copyright (c) 2012 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 CONTENT_BROWSER_GEOLOCATION_WIFI_DATA_PROVIDER_COMMON_H_
#define CONTENT_BROWSER_GEOLOCATION_WIFI_DATA_PROVIDER_COMMON_H_
#include <assert.h>
#include "base/logging.h"
#include "base/memory/scoped_ptr.h"
#include "base/memory/weak_ptr.h"
#include "base/strings/string16.h"
#include "content/browser/geolocation/wifi_data_provider.h"
#include "content/browser/geolocation/wifi_polling_policy.h"
#include "content/common/content_export.h"
namespace content {
// Converts a MAC address stored as an array of uint8 to a string.
string16 MacAddressAsString16(const uint8 mac_as_int[6]);
// Base class to promote code sharing between platform specific wifi data
// providers. It's optional for specific platforms to derive this, but if they
// do polling behavior is taken care of by this base class, and all the platform
// need do is provide the underlying WLAN access API and polling policy.
// Also designed this way for ease of testing the cross-platform behavior.
class CONTENT_EXPORT WifiDataProviderCommon : public WifiDataProviderImplBase {
public:
// Interface to abstract the low level data OS library call, and to allow
// mocking (hence public).
class WlanApiInterface {
public:
virtual ~WlanApiInterface() {}
// Gets wifi data for all visible access points.
virtual bool GetAccessPointData(WifiData::AccessPointDataSet* data) = 0;
};
WifiDataProviderCommon();
// WifiDataProviderImplBase implementation
virtual void StartDataProvider() OVERRIDE;
virtual void StopDataProvider() OVERRIDE;
virtual bool GetData(WifiData* data) OVERRIDE;
protected:
virtual ~WifiDataProviderCommon();
// Returns ownership.
virtual WlanApiInterface* NewWlanApi() = 0;
// Returns ownership.
virtual WifiPollingPolicy* NewPollingPolicy() = 0;
private:
// Runs a scan. Calls the callbacks if new data is found.
void DoWifiScanTask();
// Will schedule a scan; i.e. enqueue DoWifiScanTask deferred task.
void ScheduleNextScan(int interval);
WifiData wifi_data_;
// Whether we've successfully completed a scan for WiFi data.
bool is_first_scan_complete_;
// Underlying OS wifi API.
scoped_ptr<WlanApiInterface> wlan_api_;
// Controls the polling update interval.
scoped_ptr<WifiPollingPolicy> polling_policy_;
// Holder for delayed tasks; takes care of cleanup.
base::WeakPtrFactory<WifiDataProviderCommon> weak_factory_;
DISALLOW_COPY_AND_ASSIGN(WifiDataProviderCommon);
};
} // namespace content
#endif // CONTENT_BROWSER_GEOLOCATION_WIFI_DATA_PROVIDER_COMMON_H_
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