cb_sequence.hpp

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// Copyright 2025 Robosoft Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
 
/*****************************************************************************************************************
 *
 *   Authors: Pablo Inigo Blasco, Brett Aldrich
 *
 ******************************************************************************************************************/
 
#pragma once
 
#include <functional>
#include <rclcpp/rclcpp.hpp>
#include <smacc2/smacc_asynchronous_client_behavior.hpp>
 
namespace smacc2
{
namespace client_behaviors
{
class CbSequence : public smacc2::SmaccAsyncClientBehavior
{
public:
  CbSequence();
 
  void onEntry() override;
 
  void onExit() override { sequenceNodes_.clear(); }
 
  template <typename TOrthogonal, typename TBehavior, typename... Args>
  CbSequence * then(Args &&... args)
  {
    std::function<std::shared_ptr<smacc2::SmaccAsyncClientBehavior>()> delayedCBFactoryFn =
      [this, args...]()
    {
      RCLCPP_INFO(
        getLogger(), "[CbSequence] then creating new sub behavior %s ",
        demangleSymbol<TBehavior>().c_str());
      auto createdBh = std::shared_ptr<TBehavior>(new TBehavior(args...));
 
      this->getCurrentState()->getOrthogonal<TOrthogonal>()->addClientBehavior(createdBh);
      createdBh->template onStateOrthogonalAllocation<TOrthogonal, TBehavior>();
 
      return createdBh;
    };
 
    sequenceNodes_.push_back(delayedCBFactoryFn);
 
    return this;
  }
 
private:
  void onSubNodeSuccess();
  void onSubNodeAbort();
  void recursiveConsumeNext();
 
  std::list<std::function<std::shared_ptr<smacc2::SmaccAsyncClientBehavior>()>> sequenceNodes_;
  smacc2::SmaccSignalConnection conn_;
  smacc2::SmaccSignalConnection conn2_;
 
  std::shared_ptr<smacc2::SmaccAsyncClientBehavior> bh_;
  std::atomic<int> consume_{0};
};
}  // namespace client_behaviors
}  // namespace smacc2