Program Listing for File wait_for_event.hpp

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/*!*******************************************************************************************
 *  \file       wait_for_event.hpp
 *  \brief      Wait for event implementation as behavior tree node
 *  \authors    Pedro Arias Pérez
 *              Miguel Fernández Cortizas
 *              David Pérez Saura
 *              Rafael Pérez Seguí
 *
 *  \copyright  Copyright (c) 2022 Universidad Politécnica de Madrid
 *              All Rights Reserved
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice,
 *    this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright notice,
 *    this list of conditions and the following disclaimer in the documentation
 *    and/or other materials provided with the distribution.
 * 3. Neither the name of the copyright holder nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
 * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
 * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 ********************************************************************************/

#ifndef WAIT_FOR_EVENT_CONDITION_HPP
#define WAIT_FOR_EVENT_CONDITION_HPP

#include <string>

#include "behaviortree_cpp_v3/decorator_node.h"

#include "geometry_msgs/msg/pose.hpp"
#include "rclcpp/rclcpp.hpp"
#include "std_msgs/msg/string.hpp"

namespace as2_behavior_tree {
class WaitForEvent : public BT::DecoratorNode {
public:
  WaitForEvent(const std::string &xml_tag_name,
               const BT::NodeConfiguration &conf);

  static BT::PortsList providedPorts() {
    return {BT::InputPort<std::string>("topic_name"), BT::OutputPort("result")};
  }

private:
  BT::NodeStatus tick() override;

private:
  void callback(std_msgs::msg::String::SharedPtr msg);

private:
  rclcpp::Node::SharedPtr node_;
  rclcpp::CallbackGroup::SharedPtr callback_group_;
  rclcpp::executors::SingleThreadedExecutor callback_group_executor_;
  rclcpp::Subscription<std_msgs::msg::String>::SharedPtr sub_;
  std::string topic_name_;
  bool flag_ = false;
};

} // namespace as2_behavior_tree

#endif // WAIT_FOR_EVENT_CONDITION_HPP