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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | |
2 // Use of this source code is governed by a BSD-style license that can be | |
3 // found in the LICENSE file. | |
4 | |
5 #ifndef DEVICE_GEOLOCATION_WIFI_DATA_PROVIDER_COMMON_H_ | |
6 #define DEVICE_GEOLOCATION_WIFI_DATA_PROVIDER_COMMON_H_ | |
7 | |
8 #include <assert.h> | |
9 #include <stdint.h> | |
10 | |
11 #include <memory> | |
12 | |
13 #include "base/logging.h" | |
14 #include "base/macros.h" | |
15 #include "base/memory/weak_ptr.h" | |
16 #include "base/strings/string16.h" | |
17 #include "device/geolocation/geolocation_export.h" | |
18 #include "device/geolocation/wifi_data_provider.h" | |
19 #include "device/geolocation/wifi_polling_policy.h" | |
20 | |
21 namespace device { | |
22 | |
23 // Converts a MAC address stored as an array of uint8_t to a string. | |
24 base::string16 MacAddressAsString16(const uint8_t mac_as_int[6]); | |
25 | |
26 // Base class to promote code sharing between platform specific wifi data | |
27 // providers. It's optional for specific platforms to derive this, but if they | |
28 // do polling behavior is taken care of by this base class, and all the platform | |
29 // need do is provide the underlying WLAN access API and polling policy. | |
30 // Also designed this way for ease of testing the cross-platform behavior. | |
31 class DEVICE_GEOLOCATION_EXPORT WifiDataProviderCommon | |
32 : public WifiDataProvider { | |
33 public: | |
34 // Interface to abstract the low level data OS library call, and to allow | |
35 // mocking (hence public). | |
36 class WlanApiInterface { | |
37 public: | |
38 virtual ~WlanApiInterface() {} | |
39 // Gets wifi data for all visible access points. | |
40 virtual bool GetAccessPointData(WifiData::AccessPointDataSet* data) = 0; | |
41 }; | |
42 | |
43 WifiDataProviderCommon(); | |
44 | |
45 // WifiDataProvider implementation | |
46 void StartDataProvider() override; | |
47 void StopDataProvider() override; | |
48 bool GetData(WifiData* data) override; | |
49 | |
50 protected: | |
51 ~WifiDataProviderCommon() override; | |
52 | |
53 // Returns ownership. | |
54 virtual WlanApiInterface* NewWlanApi() = 0; | |
55 | |
56 // Returns ownership. | |
57 virtual WifiPollingPolicy* NewPollingPolicy() = 0; | |
58 | |
59 private: | |
60 // Runs a scan. Calls the callbacks if new data is found. | |
61 void DoWifiScanTask(); | |
62 | |
63 // Will schedule a scan; i.e. enqueue DoWifiScanTask deferred task. | |
64 void ScheduleNextScan(int interval); | |
65 | |
66 WifiData wifi_data_; | |
67 | |
68 // Whether we've successfully completed a scan for WiFi data. | |
69 bool is_first_scan_complete_; | |
70 | |
71 // Underlying OS wifi API. | |
72 std::unique_ptr<WlanApiInterface> wlan_api_; | |
73 | |
74 // Controls the polling update interval. | |
75 std::unique_ptr<WifiPollingPolicy> polling_policy_; | |
76 | |
77 // Holder for delayed tasks; takes care of cleanup. | |
78 base::WeakPtrFactory<WifiDataProviderCommon> weak_factory_; | |
79 | |
80 DISALLOW_COPY_AND_ASSIGN(WifiDataProviderCommon); | |
81 }; | |
82 | |
83 } // namespace device | |
84 | |
85 #endif // DEVICE_GEOLOCATION_WIFI_DATA_PROVIDER_COMMON_H_ | |
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