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      1 // Copyright 2014 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_BLUETOOTH_BLUETOOTH_REMOTE_GATT_DESCRIPTOR_CHROMEOS_H_
      6 #define DEVICE_BLUETOOTH_BLUETOOTH_REMOTE_GATT_DESCRIPTOR_CHROMEOS_H_
      7 
      8 #include <string>
      9 #include <vector>
     10 
     11 #include "base/memory/weak_ptr.h"
     12 #include "dbus/object_path.h"
     13 #include "device/bluetooth/bluetooth_gatt_descriptor.h"
     14 #include "device/bluetooth/bluetooth_uuid.h"
     15 
     16 namespace device {
     17 
     18 class BluetoothGattCharacteristic;
     19 
     20 }  // namespace device
     21 
     22 namespace chromeos {
     23 
     24 class BluetoothRemoteGattCharacteristicChromeOS;
     25 
     26 // The BluetoothRemoteGattDescriptorChromeOS class implements
     27 // BluetoothGattDescriptor for remote GATT characteristic descriptors on the
     28 // Chrome OS platform.
     29 class BluetoothRemoteGattDescriptorChromeOS
     30     : public device::BluetoothGattDescriptor {
     31  public:
     32   // device::BluetoothGattDescriptor overrides.
     33   virtual std::string GetIdentifier() const OVERRIDE;
     34   virtual device::BluetoothUUID GetUUID() const OVERRIDE;
     35   virtual bool IsLocal() const OVERRIDE;
     36   virtual const std::vector<uint8>& GetValue() const OVERRIDE;
     37   virtual device::BluetoothGattCharacteristic*
     38       GetCharacteristic() const OVERRIDE;
     39   virtual device::BluetoothGattCharacteristic::Permissions
     40       GetPermissions() const OVERRIDE;
     41   virtual void ReadRemoteDescriptor(
     42       const ValueCallback& callback,
     43       const ErrorCallback& error_callback) OVERRIDE;
     44   virtual void WriteRemoteDescriptor(
     45       const std::vector<uint8>& new_value,
     46       const base::Closure& callback,
     47       const ErrorCallback& error_callback) OVERRIDE;
     48 
     49   // Object path of the underlying D-Bus characteristic.
     50   const dbus::ObjectPath& object_path() const { return object_path_; }
     51 
     52  private:
     53   friend class BluetoothRemoteGattCharacteristicChromeOS;
     54 
     55   BluetoothRemoteGattDescriptorChromeOS(
     56       BluetoothRemoteGattCharacteristicChromeOS* characteristic,
     57       const dbus::ObjectPath& object_path);
     58   virtual ~BluetoothRemoteGattDescriptorChromeOS();
     59 
     60   // Called by dbus:: on successful completion of a request to read
     61   // the descriptor value.
     62   void OnValueSuccess(const ValueCallback& callback,
     63                       const std::vector<uint8>& value);
     64 
     65   // Called by dbus:: on unsuccessful completion of a request to read or write
     66   // the descriptor value.
     67   void OnError(const ErrorCallback& error_callback,
     68                const std::string& error_name,
     69                const std::string& error_message);
     70 
     71   // Object path of the D-Bus descriptor object.
     72   dbus::ObjectPath object_path_;
     73 
     74   // The GATT characteristic this descriptor belongs to.
     75   BluetoothRemoteGattCharacteristicChromeOS* characteristic_;
     76 
     77   // The cached characteristic value based on the most recent read request.
     78   std::vector<uint8> cached_value_;
     79 
     80   // Note: This should remain the last member so it'll be destroyed and
     81   // invalidate its weak pointers before any other members are destroyed.
     82   base::WeakPtrFactory<BluetoothRemoteGattDescriptorChromeOS> weak_ptr_factory_;
     83 
     84   DISALLOW_COPY_AND_ASSIGN(BluetoothRemoteGattDescriptorChromeOS);
     85 };
     86 
     87 }  // namespace chromeos
     88 
     89 #endif  // DEVICE_BLUETOOTH_BLUETOOTH_REMOTE_GATT_DESCRIPTOR_CHROMEOS_H_
     90