device/bluetooth/bluetooth_remote_gatt_service_chromeos.h

   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_SERVICE_CHROMEOS_H_
   6 #define DEVICE_BLUETOOTH_BLUETOOTH_REMOTE_GATT_SERVICE_CHROMEOS_H_
   7
   8 #include <map>
   9 #include <string>
  10 #include <vector>
  11
  12 #include "base/memory/ref_counted.h"
  13 #include "base/memory/weak_ptr.h"
  14 #include "base/observer_list.h"
  15 #include "chromeos/dbus/bluetooth_gatt_characteristic_client.h"
  16 #include "chromeos/dbus/bluetooth_gatt_service_client.h"
  17 #include "dbus/object_path.h"
  18 #include "device/bluetooth/bluetooth_gatt_service.h"
  19 #include "device/bluetooth/bluetooth_uuid.h"
  20
  21 namespace device {
  22
  23 class BluetoothAdapter;
  24 class BluetoothGattCharacteristic;
  25
  26 }  // namespace device
  27
  28 namespace chromeos {
  29
  30 class BluetoothAdapterChromeOS;
  31 class BluetoothDeviceChromeOS;
  32 class BluetoothRemoteGattCharacteristicChromeOS;
  33 class BluetoothRemoteGattDescriptorChromeOS;
  34
  35 // The BluetoothRemoteGattServiceChromeOS class implements BluetootGattService
  36 // for remote GATT services on the Chrome OS platform.
  37 class BluetoothRemoteGattServiceChromeOS
  38     : public device::BluetoothGattService,
  39       public BluetoothGattServiceClient::Observer,
  40       public BluetoothGattCharacteristicClient::Observer {
  41  public:
  42   // device::BluetoothGattService overrides.
  43   std::string GetIdentifier() const override;
  44   device::BluetoothUUID GetUUID() const override;
  45   bool IsLocal() const override;
  46   bool IsPrimary() const override;
  47   device::BluetoothDevice* GetDevice() const override;
  48   std::vector<device::BluetoothGattCharacteristic*> GetCharacteristics()
  49       const override;
  50   std::vector<device::BluetoothGattService*> GetIncludedServices()
  51       const override;
  52   device::BluetoothGattCharacteristic* GetCharacteristic(
  53       const std::string& identifier) const override;
  54   bool AddCharacteristic(
  55       device::BluetoothGattCharacteristic* characteristic) override;
  56   bool AddIncludedService(device::BluetoothGattService* service) override;
  57   void Register(const base::Closure& callback,
  58                 const ErrorCallback& error_callback) override;
  59   void Unregister(const base::Closure& callback,
  60                   const ErrorCallback& error_callback) override;
  61
  62   // Object path of the underlying service.
  63   const dbus::ObjectPath& object_path() const { return object_path_; }
  64
  65   // Parses a named D-Bus error into a service error code.
  66   static device::BluetoothGattService::GattErrorCode DBusErrorToServiceError(
  67       const std::string error_name);
  68
  69   // Returns the adapter associated with this service.
  70   BluetoothAdapterChromeOS* GetAdapter() const;
  71
  72   // Notifies its observers that the GATT service has changed. This is mainly
  73   // used by BluetoothRemoteGattCharacteristicChromeOS instances to notify
  74   // service observers when characteristic descriptors get added and removed.
  75   void NotifyServiceChanged();
  76
  77   // Notifies its observers that a descriptor |descriptor| belonging to
  78   // characteristic |characteristic| has been added or removed. This is used
  79   // by BluetoothRemoteGattCharacteristicChromeOS instances to notify service
  80   // observers when characteristic descriptors get added and removed. If |added|
  81   // is true, an "Added" event will be sent. Otherwise, a "Removed" event will
  82   // be sent.
  83   void NotifyDescriptorAddedOrRemoved(
  84       BluetoothRemoteGattCharacteristicChromeOS* characteristic,
  85       BluetoothRemoteGattDescriptorChromeOS* descriptor,
  86       bool added);
  87
  88   // Notifies its observers that the value of a descriptor has changed. Called
  89   // by BluetoothRemoteGattCharacteristicChromeOS instances to notify service
  90   // observers.
  91   void NotifyDescriptorValueChanged(
  92       BluetoothRemoteGattCharacteristicChromeOS* characteristic,
  93       BluetoothRemoteGattDescriptorChromeOS* descriptor,
  94       const std::vector<uint8>& value);
  95
  96  private:
  97   friend class BluetoothDeviceChromeOS;
  98
  99   BluetoothRemoteGattServiceChromeOS(BluetoothAdapterChromeOS* adapter,
 100                                      BluetoothDeviceChromeOS* device,
 101                                      const dbus::ObjectPath& object_path);
 102   ~BluetoothRemoteGattServiceChromeOS() override;
 103
 104   // BluetoothGattServiceClient::Observer override.
 105   void GattServicePropertyChanged(const dbus::ObjectPath& object_path,
 106                                   const std::string& property_name) override;
 107
 108   // BluetoothGattCharacteristicClient::Observer override.
 109   void GattCharacteristicAdded(const dbus::ObjectPath& object_path) override;
 110   void GattCharacteristicRemoved(const dbus::ObjectPath& object_path) override;
 111   void GattCharacteristicPropertyChanged(
 112       const dbus::ObjectPath& object_path,
 113       const std::string& property_name) override;
 114
 115   // Object path of the GATT service.
 116   dbus::ObjectPath object_path_;
 117
 118   // The adapter associated with this service. It's ok to store a raw pointer
 119   // here since |adapter_| indirectly owns this instance.
 120   BluetoothAdapterChromeOS* adapter_;
 121
 122   // The device this GATT service belongs to. It's ok to store a raw pointer
 123   // here since |device_| owns this instance.
 124   BluetoothDeviceChromeOS* device_;
 125
 126   // Mapping from GATT characteristic object paths to characteristic objects.
 127   // owned by this service. Since the Chrome OS implementation uses object
 128   // paths as unique identifiers, we also use this mapping to return
 129   // characteristics by identifier.
 130   typedef std::map<dbus::ObjectPath, BluetoothRemoteGattCharacteristicChromeOS*>
 131       CharacteristicMap;
 132   CharacteristicMap characteristics_;
 133
 134   // Indicates whether or not the characteristics of this service are known to
 135   // have been discovered.
 136   bool discovery_complete_;
 137
 138   // Note: This should remain the last member so it'll be destroyed and
 139   // invalidate its weak pointers before any other members are destroyed.
 140   base::WeakPtrFactory<BluetoothRemoteGattServiceChromeOS> weak_ptr_factory_;
 141
 142   DISALLOW_COPY_AND_ASSIGN(BluetoothRemoteGattServiceChromeOS);
 143 };
 144
 145 }  // namespace chromeos
 146
 147 #endif  // DEVICE_BLUETOOTH_BLUETOOTH_REMOTE_GATT_SERVICE_CHROMEOS_H_