gazebo_ros_utils.h

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 *  Copyright (c) 2013, Markus Bader <markus.bader@tuwien.ac.at>
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#ifndef GAZEBO_ROS_UTILS_H
#define GAZEBO_ROS_UTILS_H
#include <map>
#include <boost/algorithm/string.hpp>

#include <gazebo/common/common.hh>
#include <gazebo/physics/physics.hh>
#include <gazebo/sensors/Sensor.hh>
#include <gazebo/gazebo_config.h>
#include <ros/ros.h>

#ifndef GAZEBO_SENSORS_USING_DYNAMIC_POINTER_CAST
# if GAZEBO_MAJOR_VERSION >= 7
#define GAZEBO_SENSORS_USING_DYNAMIC_POINTER_CAST using std::dynamic_pointer_cast
# else
#define GAZEBO_SENSORS_USING_DYNAMIC_POINTER_CAST using boost::dynamic_pointer_cast
# endif
#endif

namespace gazebo
{

inline std::string GetModelName ( const sensors::SensorPtr &parent )
{
    std::string modelName;
    std::vector<std::string> values;
# if GAZEBO_MAJOR_VERSION >= 7
    std::string scopedName = parent->ScopedName();
# else
    std::string scopedName = parent->GetScopedName();
#endif
    boost::replace_all ( scopedName, "::", "," );
    boost::split ( values, scopedName, boost::is_any_of ( "," ) );
    if ( values.size() < 2 ) {
        modelName = "";
    } else {
        modelName = values[1];
    }
    return modelName;
}

inline std::string GetRobotNamespace ( const sensors::SensorPtr &parent, const sdf::ElementPtr &sdf, const char *pInfo = NULL )
{
    std::string name_space;
    std::stringstream ss;
    if ( sdf->HasElement ( "robotNamespace" ) ) {
        name_space = sdf->Get<std::string> ( "robotNamespace" );
        if ( name_space.empty() ) {
            ss << "the 'robotNamespace' param was empty";
            name_space = GetModelName ( parent );
        } else {
            ss << "Using the 'robotNamespace' param: '" <<  name_space << "'";
        }
    } else {
        ss << "the 'robotNamespace' param did not exit";
    }
    if ( pInfo != NULL ) {
        ROS_INFO ( "%s Plugin (robotNamespace = %s), Info: %s" , pInfo, name_space.c_str(), ss.str().c_str() );
    }
    return name_space;
}

class GazeboRos
{
private:
    sdf::ElementPtr sdf_;       
    std::string plugin_;        
    std::string namespace_;     
    boost::shared_ptr<ros::NodeHandle> rosnode_; 
    std::string tf_prefix_;     
    std::string info_text;      

    void readCommonParameter ();
public:
    GazeboRos ( physics::ModelPtr &_parent, sdf::ElementPtr _sdf, const std::string &_plugin )
        : sdf_ ( _sdf ), plugin_ ( _plugin ) {
        namespace_ = _parent->GetName ();
        if ( !sdf_->HasElement ( "robotNamespace" ) ) {
            ROS_INFO ( "%s missing <robotNamespace>, defaults is %s", plugin_.c_str(), namespace_.c_str() );
        }  else {
            namespace_ = sdf_->GetElement ( "robotNamespace" )->Get<std::string>();
            if ( namespace_.empty() ) {
                namespace_ = _parent->GetName();
            }
        }
        if ( !namespace_.empty() )
            this->namespace_ += "/";
        rosnode_ = boost::shared_ptr<ros::NodeHandle> ( new ros::NodeHandle ( namespace_ ) );
        info_text = plugin_ + "(ns = " + namespace_ + ")";
        readCommonParameter ();
    }
    GazeboRos ( sensors::SensorPtr _parent, sdf::ElementPtr _sdf, const std::string &_plugin )
        : sdf_ ( _sdf ), plugin_ ( _plugin ) {

        std::stringstream ss;
        if ( sdf_->HasElement ( "robotNamespace" ) ) {
            namespace_ = sdf_->Get<std::string> ( "robotNamespace" );
            if ( namespace_.empty() ) {
                ss << "the 'robotNamespace' param was empty";
                namespace_ = GetModelName ( _parent );
            } else {
                ss << "Using the 'robotNamespace' param: '" <<  namespace_ << "'";
            }
        } else {
            ss << "the 'robotNamespace' param did not exit";
        }
        info_text = plugin_ + "(ns = " + namespace_ + ")";
        ROS_INFO ( "%s: %s" , info_text.c_str(), ss.str().c_str() );
        readCommonParameter ();
    }

    const char* info() const;
    boost::shared_ptr<ros::NodeHandle>& node();;
    const boost::shared_ptr<ros::NodeHandle>& node() const;
    std::string resolveTF ( const std::string &_name );

    void getParameterBoolean ( bool &_value, const char *_tag_name, const bool &_default );
    void getParameterBoolean ( bool &_value, const char *_tag_name );
    physics::JointPtr getJoint ( physics::ModelPtr &_parent, const char *_tag_name, const std::string &_joint_default_name );
    void isInitialized();


    template <class T>
    void getParameter ( T &_value, const char *_tag_name, const T &_default ) {
        _value = _default;
        if ( !sdf_->HasElement ( _tag_name ) ) {
            ROS_WARN ( "%s: missing <%s> default is %s", info(), _tag_name, boost::lexical_cast<std::string> ( _default ).c_str() );
        } else {
            this->getParameter<T> ( _value, _tag_name );
        }
    }
    template <class T>
    void getParameter ( T &_value, const char *_tag_name ) {
        if ( sdf_->HasElement ( _tag_name ) ) {
            _value = sdf_->GetElement ( _tag_name )->Get<T>();
        }
        ROS_DEBUG ( "%s: <%s> = %s", info(), _tag_name, boost::lexical_cast<std::string> ( _value ).c_str() );

    }

    template <class T>
    void getParameter ( T &_value, const char *_tag_name, const std::map<std::string, T> &_options, const T &_default ) {
        _value = _default;
        if ( !sdf_->HasElement ( _tag_name ) ) {
            ROS_WARN ( "%s: missing <%s> default is %s", info(), _tag_name, boost::lexical_cast<std::string> ( _default ).c_str() );
        } else {
            this->getParameter<T> ( _value, _tag_name, _options );
        }
    }
    template <class T>
    void getParameter ( T &_value, const char *_tag_name, const std::map<std::string, T> &_options ) {
        typename std::map<std::string, T >::const_iterator it;
        if ( sdf_->HasElement ( _tag_name ) ) {
            std::string value = sdf_->GetElement ( _tag_name )->Get<std::string>();
            it = _options.find ( value );
            if ( it == _options.end() ) {
                ROS_WARN ( "%s: <%s> no matching key to %s", info(), _tag_name, value.c_str() );
            } else {
                _value = it->second;
            }
        }
        ROS_DEBUG ( "%s: <%s> = %s := %s",  info(), _tag_name, ( it == _options.end() ?"default":it->first.c_str() ), boost::lexical_cast<std::string> ( _value ).c_str() );
    }
};

typedef boost::shared_ptr<GazeboRos> GazeboRosPtr;
}
#endif