Complete //device/bt implementation for hosting local GATT attributes.

device/bluetooth/bluez/bluetooth_gatt_service_bluez.h

Index: device/bluetooth/bluez/bluetooth_gatt_service_bluez.h
diff --git a/device/bluetooth/bluez/bluetooth_gatt_service_bluez.h b/device/bluetooth/bluez/bluetooth_gatt_service_bluez.h
index 45932d09d3130ca105edd8a6744ec8609acc8668..dd9c078bba61f246dcab0db9936561146e2fdafa 100644
--- a/device/bluetooth/bluez/bluetooth_gatt_service_bluez.h
+++ b/device/bluetooth/bluez/bluetooth_gatt_service_bluez.h
@@ -5,13 +5,14 @@
 #ifndef DEVICE_BLUETOOTH_BLUEZ_BLUETOOTH_GATT_SERVICE_BLUEZ_H_
 #define DEVICE_BLUETOOTH_BLUEZ_BLUETOOTH_GATT_SERVICE_BLUEZ_H_
 
-#include <map>
+#include <cstdint>
 #include <string>
 #include <vector>
 
+#include "base/callback_forward.h"
 #include "base/macros.h"
 #include "dbus/object_path.h"
-#include "device/bluetooth/bluetooth_gatt_service.h"
+#include "device/bluetooth/bluetooth_local_gatt_service.h"
 
 namespace bluez {
 
@@ -22,6 +23,39 @@ class BluetoothDeviceBlueZ;
 // for GATT services on platforms that use BlueZ.
 class BluetoothGattServiceBlueZ : public virtual device::BluetoothGattService {
  public:
+  // A simpler interface for reacting to GATT attribute value requests by the
+  // DBus attribute service providers.
+  class AttributeValueDelegate {
+   public:
+    virtual ~AttributeValueDelegate() {}
+
+    // This method will be called when a remote device requests to read the
+    // value of the exported GATT attribute. Invoke |callback| with a value
+    // to return that value to the requester. Invoke |error_callback| to report
+    // a failure to read the value. This can happen, for example, if the
+    // attribute has no read permission set. Either callback should be
+    // invoked after a reasonable amount of time, since the request will time
+    // out if left pending for too long causing a disconnection.
+    virtual void GetValue(
+        const device::BluetoothLocalGattService::Delegate::ValueCallback&
+            callback,
+        const device::BluetoothLocalGattService::Delegate::ErrorCallback&
+            error_callback) = 0;
+
+    // This method will be called, when a remote device requests to write the
+    // value of the exported GATT attribute. Invoke |callback| to report
+    // that the value was successfully written. Invoke |error_callback| to
+    // report a failure to write the value. This can happen, for example, if the
+    // attribute has no write permission set. Either callback should be
+    // invoked after a reasonable amount of time, since the request will time
+    // out if left pending for too long causing a disconnection.
+    virtual void SetValue(
+        const std::vector<uint8_t>& value,
+        const base::Closure& callback,
+        const device::BluetoothLocalGattService::Delegate::ErrorCallback&
+            error_callback) = 0;
+  };
+
   // device::BluetoothGattService overrides.
   std::string GetIdentifier() const override;
 
@@ -35,6 +69,9 @@ class BluetoothGattServiceBlueZ : public virtual device::BluetoothGattService {
   // Returns the adapter associated with this service.
   BluetoothAdapterBlueZ* GetAdapter() const;
 
+  dbus::ObjectPath GenerateAttributeObjectPath(
+      const std::string attribute_type);
+
  protected:
   explicit BluetoothGattServiceBlueZ(BluetoothAdapterBlueZ* adapter);
   ~BluetoothGattServiceBlueZ() override;