Program Listing for File is_stuck_condition.hpp

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// Copyright (c) 2018 Intel Corporation
//
// 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.

#ifndef NAV2_BEHAVIOR_TREE__PLUGINS__CONDITION__IS_STUCK_CONDITION_HPP_
#define NAV2_BEHAVIOR_TREE__PLUGINS__CONDITION__IS_STUCK_CONDITION_HPP_

#include <string>
#include <atomic>
#include <deque>

#include "rclcpp/rclcpp.hpp"
#include "behaviortree_cpp/condition_node.h"
#include "nav_msgs/msg/odometry.hpp"

namespace nav2_behavior_tree
{

class IsStuckCondition : public BT::ConditionNode
{
public:
  IsStuckCondition(
    const std::string & condition_name,
    const BT::NodeConfiguration & conf);

  IsStuckCondition() = delete;

  ~IsStuckCondition() override;

  void onOdomReceived(const typename nav_msgs::msg::Odometry::SharedPtr msg);

  BT::NodeStatus tick() override;

  void logStuck(const std::string & msg) const;

  void updateStates();

  bool isStuck();

  static BT::PortsList providedPorts() {return {};}

private:
  // The node that will be used for any ROS operations
  rclcpp::Node::SharedPtr node_;
  rclcpp::CallbackGroup::SharedPtr callback_group_;
  rclcpp::executors::SingleThreadedExecutor callback_group_executor_;
  std::thread callback_group_executor_thread;

  std::atomic<bool> is_stuck_;

  // Listen to odometry
  rclcpp::Subscription<nav_msgs::msg::Odometry>::SharedPtr odom_sub_;
  // Store history of odometry measurements
  std::deque<nav_msgs::msg::Odometry> odom_history_;
  std::deque<nav_msgs::msg::Odometry>::size_type odom_history_size_;

  // Calculated states
  double current_accel_;

  // Robot specific paramters
  double brake_accel_limit_;
};

}  // namespace nav2_behavior_tree

#endif  // NAV2_BEHAVIOR_TREE__PLUGINS__CONDITION__IS_STUCK_CONDITION_HPP_