text: // Copyright 2020 The Fuchsia 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 SRC_CONNECTIVITY_BLUETOOTH_CORE_BT_HOST_GAP_GENERIC_ACCESS_CLIENT_H_
  #define SRC_CONNECTIVITY_BLUETOOTH_CORE_BT_HOST_GAP_GENERIC_ACCESS_CLIENT_H_
  
  #include <fbl/ref_ptr.h>
  
  #include "src/connectivity/bluetooth/core/bt-host/gatt/remote_service.h"
  
  namespace bt::gap::internal {
  
  // This is a helper for reading characteristics of a remote Generic Access GATT service.
  // Characteristics are not cached and read requests are not multiplexed because this is already
  // taken care of in gatt::RemoteService.
  // Destroying GenericAccessClient will cancel any read requests and callbacks will not be called.
  class GenericAccessClient {
   public:
    // |peer_id| is the id of the peer serving the service.
    // The UUID of |generic_access_service| must be kGenericAccessService.
    GenericAccessClient(PeerId peer_id, fbl::RefPtr<gatt::RemoteService> generic_access_service);
  
    // Discover and read the peripheral preferred connections characteristic, if present.
    using ConnectionParametersCallback =
        fit::callback<void(fit::result<hci::LEPreferredConnectionParameters, att::Status>)>;
    void ReadPeripheralPreferredConnectionParameters(ConnectionParametersCallback callback);
  
   private:
    fbl::RefPtr<gatt::RemoteService> service_;
    PeerId peer_id_;
    fxl::WeakPtrFactory<GenericAccessClient> weak_ptr_factory_;
  };
  
  }  // namespace bt::gap::internal
  
  #endif  // SRC_CONNECTIVITY_BLUETOOTH_CORE_BT_HOST_GAP_GENERIC_ACCESS_CLIENT_H_
  