Implement BluetoothRemoteGattCharacteristicWin::GetDescriptors

device/bluetooth/bluetooth_remote_gatt_characteristic_win.h

 // Copyright 2016 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 DEVICE_BLUETOOTH_BLUETOOTH_REMOTE_GATT_CHARACTERISTIC_WIN_H_
 #define DEVICE_BLUETOOTH_BLUETOOTH_REMOTE_GATT_CHARACTERISTIC_WIN_H_
 
+#include <unordered_map>
+
 #include "base/memory/weak_ptr.h"
 #include "base/sequenced_task_runner.h"
 #include "device/bluetooth/bluetooth_gatt_characteristic.h"
 #include "device/bluetooth/bluetooth_low_energy_defs_win.h"
 
 namespace device {
 
 class BluetoothAdapterWin;
+class BluetoothRemoteGattDescriptorWin;
 class BluetoothRemoteGattServiceWin;
 class BluetoothTaskManagerWin;
 
 // The BluetoothRemoteGattCharacteristicWin class implements
 // BluetoothGattCharacteristic for remote GATT services on Windows 8 and later.
 class DEVICE_BLUETOOTH_EXPORT BluetoothRemoteGattCharacteristicWin
     : public BluetoothGattCharacteristic {
  public:
   BluetoothRemoteGattCharacteristicWin(
       BluetoothRemoteGattServiceWin* parent_service,
@@ skipping 19 matching lines @@
                           const ErrorCallback& error_callback) override;
   void ReadRemoteCharacteristic(const ValueCallback& callback,
                                 const ErrorCallback& error_callback) override;
   void WriteRemoteCharacteristic(const std::vector<uint8_t>& new_value,
                                  const base::Closure& callback,
                                  const ErrorCallback& error_callback) override;
 
   // Update included descriptors.
   void Update();
   uint16_t GetAttributeHandle() const;
+  BluetoothRemoteGattServiceWin* GetWinService() { return parent_service_; }
 
  private:
-  BluetoothAdapterWin* adapter_;
+  void OnGetIncludedDescriptorsCallback(
+      scoped_ptr<BTH_LE_GATT_DESCRIPTOR> descriptors,
+      uint16_t num,
+      HRESULT hr);
+  void UpdateIncludedDescriptors(PBTH_LE_GATT_DESCRIPTOR descriptors,
+                                 uint16_t num);
+
+  // Checks if the descriptor with |uuid| and |attribute_handle| has already
+  // been discovered as included descriptor.
+  bool IsDescriptorDiscovered(BTH_LE_UUID& uuid, uint16_t attribute_handle);
+
+  // Checks if |descriptor| still exists in this characteristic according to
+  // newly discovered |num| of |descriptors|.
+  static bool DoesDescriptorExist(PBTH_LE_GATT_DESCRIPTOR descriptors,
+                                  uint16_t num,
+                                  BluetoothRemoteGattDescriptorWin* descriptor);
+
   BluetoothRemoteGattServiceWin* parent_service_;
   scoped_refptr<BluetoothTaskManagerWin> task_manager_;
 
   // Characteristic info from OS and used to interact with OS.
   scoped_ptr<BTH_LE_GATT_CHARACTERISTIC> characteristic_info_;
   scoped_refptr<base::SequencedTaskRunner> ui_task_runner_;
   BluetoothUUID characteristic_uuid_;
   std::vector<uint8_t> characteristic_value_;
   std::string characteristic_identifier_;
 
+  // The key of GattDescriptorMap is the identitfier of
+  // BluetoothRemoteGattDescriptorWin instance.
+  typedef std::unordered_map<std::string,
+                             scoped_ptr<BluetoothRemoteGattDescriptorWin>>
+      GattDescriptorMap;
+  GattDescriptorMap included_descriptors_;
+
+  // Flag indicates if characteristic added notification of this characteristic
+  // has been sent out to avoid duplicate notification.
+  bool characteristic_added_notified_;
+
   base::WeakPtrFactory<BluetoothRemoteGattCharacteristicWin> weak_ptr_factory_;
   DISALLOW_COPY_AND_ASSIGN(BluetoothRemoteGattCharacteristicWin);
 };
 
 }  // namespace device
 
 #endif  // DEVICE_BLUETOOTH_BLUETOOTH_REMOTE_GATT_CHARACTERISTIC_WIN_H_