arc: bluetooth: Implement Gatt server request to read/write

components/arc/bluetooth/arc_bluetooth_bridge.h

Index: components/arc/bluetooth/arc_bluetooth_bridge.h
diff --git a/components/arc/bluetooth/arc_bluetooth_bridge.h b/components/arc/bluetooth/arc_bluetooth_bridge.h
index ef53c79655033861ae7bfa231789d28f274162e2..400d0fbc199d334ede8e168433f580be3075e2ba 100644
--- a/components/arc/bluetooth/arc_bluetooth_bridge.h
+++ b/components/arc/bluetooth/arc_bluetooth_bridge.h
@@ -40,8 +40,21 @@ class ArcBluetoothBridge
       public device::BluetoothLocalGattService::Delegate,
       public mojom::BluetoothHost {
  public:
+  // Store callback functions for Gatt Server request read / write
+  template <class SuccessCallbackT>
+  struct GattServerCallbacks {
+    GattServerCallbacks() = default;
+    GattServerCallbacks(const SuccessCallbackT& success_callback,
+                        const ErrorCallback& error_callback)
+        : success_callback(success_callback), error_callback(error_callback) {}
+    SuccessCallbackT success_callback;
+    ErrorCallback error_callback;
+  };
+
   using GattStatusCallback = base::Callback<void(mojom::BluetoothGattStatus)>;
   using GattReadCallback = base::Callback<void(mojom::BluetoothGattValuePtr)>;
+  using GattServerReadCallbacks = GattServerCallbacks<ValueCallback>;
+  using GattServerWriteCallbacks = GattServerCallbacks<base::Closure>;
 
   explicit ArcBluetoothBridge(ArcBridgeService* bridge_service);
   ~ArcBluetoothBridge() override;
@@ -121,6 +134,20 @@ class ArcBluetoothBridge
       const std::vector<uint8_t>& value) override;
 
   // Overridden from device::BluetoothLocalGattService::Delegate
+  template <class LocalGattObjectT>
+  void OnGattAttributeReadRequest(const device::BluetoothDevice* device,
+                                  const LocalGattObjectT* gatt_obj,
+                                  int offset,
+                                  const GattServerReadCallbacks& callbacks);
+
+  template <class LocalGattObjectT>
+  void OnGattAttributeWriteRequest(
+      const device::BluetoothDevice* device,
+      const LocalGattObjectT* gatt_obj,
+      const std::vector<uint8_t>& value,
+      int offset,
+      const GattServerWriteCallbacks& callbacks) override;
+
   void OnCharacteristicReadRequest(
       const device::BluetoothDevice* device,
       const device::BluetoothLocalGattCharacteristic* characteristic,
@@ -365,6 +392,8 @@ class ArcBluetoothBridge
 
   template <class LocalGattObjectT>
   int32_t CreateGattAttributeHandle(LocalGattObjectT* gatt_obj);
+  int32_t CreateGattReadTransaction(const GattServerReadCallbacks& callbacks);
+  int32_t CreateGattWriteTransaction(const GattServerWriteCallbacks& callbacks);
 
   mojo::Binding<mojom::BluetoothHost> binding_;
 
@@ -375,10 +404,13 @@ class ArcBluetoothBridge
       notification_session_;
   // Map from android int handle to Chrome (BlueZ) string identifier.
   std::map<int32_t, std::string> gatt_identifier_;
+  std::map<std::string, int32_t> gatt_handle_;
   // Store last GattCharacteristic added to each GattService for GattServer.
   std::map<int32_t, int32_t> last_characteristic_;
   // Running number for handle to give to Android side.
   int32_t gatt_server_obj_handle = 0;
+  std::map<int32_t, GattServerReadCallbacks> gatt_server_read_callbacks_;
+  std::map<int32_t, GattServerWriteCallbacks> gatt_server_write_callbacks_;
 
   // WeakPtrFactory to use for callbacks.
   base::WeakPtrFactory<ArcBluetoothBridge> weak_factory_;