owlps/owlps-positioning/src/inputmedium.cc

#include "inputmedium.hh"
#include "calibrationrequest.hh"
#include "stock.hh"
#include "configuration.hh"

using namespace std ;



/* *** Constructors *** */


InputMedium::InputMedium():
  current_line_nb(0)
{
  current_request = new Request() ;
}


InputMedium::~InputMedium()
{
  delete current_request ;
}



/* *** Operations *** */


/**
 * Reads a Request, increments current_line_nb, updates #current_request
 * and returns it.
 *
 * The input medium should be ready to be read before precessing
 * requests; otherwise, #current_request is \link Request::clear()
 * cleared\endlink and a blank Request is returned.
 *
 * @return The Request read, or an empty Request in case of error or
 * EOF (note that when casted in bool, an empty Request is \em false,
 * see Request::operator bool()).
 */
const Request& InputMedium::get_next_request()
{
  clear_current_request() ;

  if (! fill_current_request())
    {
      clear_current_request() ;
      return *current_request ;
    }

  return *current_request ;
}


void InputMedium::clear_current_request()
{
  if (dynamic_cast<CalibrationRequest*>(current_request) == NULL)
    current_request->clear() ;
  else
    {
      delete current_request ;
      current_request = NULL ;
      current_request = new Request() ;
    }
}


/**
 * The \em position argument can be changed by this function.
 */
void InputMedium::
fill_calibration_request_data(const string &mac_mobile, Point3D &position,
                              const Direction &direction, uint8_t type)
{
  if ((type == OWL_REQUEST_CALIBRATION ||
       type == OWL_REQUEST_AUTOCALIBRATION)
      &&
      (Configuration::bool_value("positioning.accept-new-aps") ||
       Stock::ap_exists(mac_mobile)))
    {
      AccessPoint &transmitter =
        const_cast<AccessPoint&>(Stock::find_create_ap(mac_mobile)) ;

      // If an autocalibration request does not contain the coordinates
      // of the AP, we use the current coordinates of the AP as
      // ReferencePoint.
      if (type == OWL_REQUEST_AUTOCALIBRATION && ! position)
        position = transmitter.get_coordinates() ;

      // Update the AP's coordinates if allowed. A 'false' position
      // (i.e. 0;0;0) is only set for calibration requests, to avoid
      // setting the coordinates to 0;0;0 if an autocalibration
      // request that does not contain the coordinates is received.
      else if (Configuration::
               bool_value("positioning.update-ap-coordinates-online"))
        transmitter.set_coordinates(position) ;

      const ReferencePoint &reference_point =
        Stock::find_create_reference_point(position) ;
      current_request_to_calibration_request(
        &reference_point, direction, type) ;
    }

  // We set the real coordinates (if found) only for non-calibration
  // requests
  else if (position)
    current_request->set_real_position(position) ;
}


void InputMedium::
current_request_to_calibration_request(
  const ReferencePoint *const reference_point,
  const Direction &direction,
  const uint_fast8_t request_type)
{
  CalibrationRequest *calibration_request =
    dynamic_cast<CalibrationRequest*>(current_request) ;
  if (calibration_request != NULL)
    {
      calibration_request->set_reference_point(reference_point) ;
      calibration_request->set_direction(direction) ;
      calibration_request->set_type(request_type) ;
      return ;
    }

  Request *tmp = current_request ;
  current_request = NULL ;
  current_request =
    new CalibrationRequest(*tmp,
                           const_cast<ReferencePoint*>(reference_point),
                           direction, request_type) ;
  delete tmp ;
}