src/Scripting/NasalPositioned_cppbind.cxx

   1 // NasalPositioned_cppbind.cxx -- expose FGPositioned classes to Nasal
   2 //
   3 // Port of NasalPositioned.cpp to the new nasal/cppbind helpers. Will replace
   4 // old NasalPositioned.cpp once finished.
   5 //
   6 // Copyright (C) 2013  Thomas Geymayer <tomgey@gmail.com>
   7 //
   8 // This program is free software; you can redistribute it and/or
   9 // modify it under the terms of the GNU General Public License as
  10 // published by the Free Software Foundation; either version 2 of the
  11 // License, or (at your option) any later version.
  12 //
  13 // This program is distributed in the hope that it will be useful, but
  14 // WITHOUT ANY WARRANTY; without even the implied warranty of
  15 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16 // General Public License for more details.
  17 //
  18 // You should have received a copy of the GNU General Public License
  19 // along with this program; if not, write to the Free Software
  20 // Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
  21
  22 #ifdef HAVE_CONFIG_H
  23 #  include "config.h"
  24 #endif
  25
  26 #include "NasalPositioned.hxx"
  27
  28 #include <algorithm>
  29 #include <functional>
  30
  31 #include <boost/foreach.hpp>
  32 #include <boost/algorithm/string/case_conv.hpp>
  33
  34 #include <simgear/nasal/cppbind/from_nasal.hxx>
  35 #include <simgear/nasal/cppbind/to_nasal.hxx>
  36 #include <simgear/nasal/cppbind/NasalHash.hxx>
  37 #include <simgear/nasal/cppbind/Ghost.hxx>
  38
  39 #include <Airports/airport.hxx>
  40 #include <Airports/dynamics.hxx>
  41 #include <ATC/CommStation.hxx>
  42 #include <Main/globals.hxx>
  43 #include <Navaids/NavDataCache.hxx>
  44
  45 typedef nasal::Ghost<FGPositionedRef> NasalPositioned;
  46 typedef nasal::Ghost<FGRunwayRef> NasalRunway;
  47 typedef nasal::Ghost<FGParkingRef> NasalParking;
  48 typedef nasal::Ghost<FGAirportRef> NasalAirport;
  49 typedef nasal::Ghost<flightgear::CommStationRef> NasalCommStation;
  50
  51 //------------------------------------------------------------------------------
  52 naRef to_nasal_helper(naContext c, FGPositioned* positioned)
  53 {
  54   return NasalPositioned::create(c, positioned);
  55 }
  56
  57 //------------------------------------------------------------------------------
  58 naRef to_nasal_helper(naContext c, FGPavement* rwy)
  59 {
  60   return NasalPositioned::create(c, (FGPositioned*)rwy);
  61 }
  62
  63 //------------------------------------------------------------------------------
  64 naRef to_nasal_helper(naContext c, FGRunwayBase* rwy)
  65 {
  66   return NasalPositioned::create(c, (FGPositioned*)rwy);
  67 }
  68
  69 //------------------------------------------------------------------------------
  70 naRef to_nasal_helper(naContext c, FGParking* parking)
  71 {
  72   return NasalParking::create(c, parking);
  73 }
  74
  75 //------------------------------------------------------------------------------
  76 naRef to_nasal_helper(naContext c, flightgear::SID* sid)
  77 {
  78   // TODO SID ghost
  79   return nasal::to_nasal(c, sid->ident());
  80 }
  81
  82 //------------------------------------------------------------------------------
  83 naRef to_nasal_helper(naContext c, flightgear::STAR* star)
  84 {
  85   // TODO STAR ghost
  86   return nasal::to_nasal(c, star->ident());
  87 }
  88
  89 //------------------------------------------------------------------------------
  90 naRef to_nasal_helper(naContext c, flightgear::Approach* iap)
  91 {
  92   // TODO Approach ghost
  93   return nasal::to_nasal(c, iap->ident());
  94 }
  95
  96 //------------------------------------------------------------------------------
  97 naRef to_nasal_helper(naContext c, FGAirport* apt)
  98 {
  99   return NasalAirport::create(c, apt);
 100 }
 101
 102 //------------------------------------------------------------------------------
 103 naRef to_nasal_helper(naContext c, const SGGeod& pos)
 104 {
 105   nasal::Hash hash(c);
 106   hash.set("lat", pos.getLatitudeDeg());
 107   hash.set("lon", pos.getLongitudeDeg());
 108   hash.set("elevation", pos.getElevationM());
 109   return hash.get_naRef();
 110 }
 111
 112 //------------------------------------------------------------------------------
 113 static FGRunwayBase* f_airport_runway(FGAirport& apt, std::string ident)
 114 {
 115   boost::to_upper(ident);
 116
 117   if( apt.hasRunwayWithIdent(ident) )
 118     return apt.getRunwayByIdent(ident);
 119   else if( apt.hasHelipadWithIdent(ident) )
 120     return apt.getHelipadByIdent(ident);
 121
 122   return 0;
 123 }
 124
 125 //------------------------------------------------------------------------------
 126 template<class T, class C1, class C2>
 127 std::vector<T> extract( const std::vector<C1*>& in,
 128                         T (C2::*getter)() const )
 129 {
 130   std::vector<T> ret(in.size());
 131   std::transform(in.begin(), in.end(), ret.begin(), std::mem_fun(getter));
 132   return ret;
 133 }
 134
 135 //------------------------------------------------------------------------------
 136 static naRef f_airport_comms(FGAirport& apt, const nasal::CallContext& ctx)
 137 {
 138   FGPositioned::Type comm_type =
 139     FGPositioned::typeFromName( ctx.getArg<std::string>(0) );
 140
 141   // if we have an explicit type, return a simple vector of frequencies
 142   if( comm_type != FGPositioned::INVALID )
 143     return ctx.to_nasal
 144     (
 145       extract( apt.commStationsOfType(comm_type),
 146                &flightgear::CommStation::freqMHz )
 147     );
 148   else
 149     // otherwise return a vector of ghosts, one for each comm station.
 150     return ctx.to_nasal(apt.commStations());
 151 }
 152
 153 //------------------------------------------------------------------------------
 154 FGRunway* runwayFromNasalArg( const FGAirport& apt,
 155                               const nasal::CallContext& ctx,
 156                               size_t index = 0 )
 157 {
 158   if( index >= ctx.argc )
 159     return NULL;
 160
 161   try
 162   {
 163     std::string ident = ctx.getArg<std::string>(index);
 164     if( !ident.empty() )
 165     {
 166       if( !apt.hasRunwayWithIdent(ident) )
 167         // TODO warning/exception?
 168         return NULL;
 169
 170       return apt.getRunwayByIdent(ident);
 171     }
 172   }
 173   catch(...)
 174   {}
 175
 176   // TODO warn/error if no runway?
 177   return NasalRunway::fromNasal(ctx.c, ctx.args[index]);
 178 }
 179
 180 //------------------------------------------------------------------------------
 181 static naRef f_airport_sids(FGAirport& apt, const nasal::CallContext& ctx)
 182 {
 183   FGRunway* rwy = runwayFromNasalArg(apt, ctx);
 184   return ctx.to_nasal
 185   (
 186     extract(rwy ? rwy->getSIDs() : apt.getSIDs(), &flightgear::SID::ident)
 187   );
 188 }
 189
 190 //------------------------------------------------------------------------------
 191 static naRef f_airport_stars(FGAirport& apt, const nasal::CallContext& ctx)
 192 {
 193   FGRunway* rwy = runwayFromNasalArg(apt, ctx);
 194   return ctx.to_nasal
 195   (
 196     extract(rwy ? rwy->getSTARs() : apt.getSTARs(), &flightgear::STAR::ident)
 197   );
 198 }
 199
 200 //------------------------------------------------------------------------------
 201 static naRef f_airport_approaches(FGAirport& apt, const nasal::CallContext& ctx)
 202 {
 203   FGRunway* rwy = runwayFromNasalArg(apt, ctx);
 204
 205   flightgear::ProcedureType type = flightgear::PROCEDURE_INVALID;
 206   std::string type_str = ctx.getArg<std::string>(1);
 207   if( !type_str.empty() )
 208   {
 209     boost::to_upper(type_str);
 210     if(      type_str == "NDB" ) type = flightgear::PROCEDURE_APPROACH_NDB;
 211     else if( type_str == "VOR" ) type = flightgear::PROCEDURE_APPROACH_VOR;
 212     else if( type_str == "ILS" ) type = flightgear::PROCEDURE_APPROACH_ILS;
 213     else if( type_str == "RNAV") type = flightgear::PROCEDURE_APPROACH_RNAV;
 214   }
 215
 216   return ctx.to_nasal
 217   (
 218     extract( rwy ? rwy->getApproaches(type)
 219                  // no runway specified, report them all
 220                  : apt.getApproaches(type),
 221              &flightgear::Approach::ident )
 222   );
 223 }
 224
 225 //------------------------------------------------------------------------------
 226 static FGParkingList
 227 f_airport_parking(FGAirport& apt, const nasal::CallContext& ctx)
 228 {
 229   std::string type = ctx.getArg<std::string>(0);
 230   bool only_available = ctx.getArg<bool>(1);
 231
 232   FGAirportDynamics* dynamics = apt.getDynamics();
 233   PositionedIDVec parkings =
 234     flightgear::NavDataCache::instance()
 235       ->airportItemsOfType(apt.guid(), FGPositioned::PARKING);
 236
 237   FGParkingList ret;
 238   BOOST_FOREACH(PositionedID parking, parkings)
 239   {
 240     // filter out based on availability and type
 241     if( only_available && !dynamics->isParkingAvailable(parking) )
 242       continue;
 243
 244     FGParking* park = dynamics->getParking(parking);
 245     if( !type.empty() && (park->getType() != type) )
 246       continue;
 247
 248     ret.push_back(park);
 249   }
 250
 251   return ret;
 252 }
 253
 254 //------------------------------------------------------------------------------
 255 // Returns Nasal ghost for particular or nearest airport of a <type>, or nil
 256 // on error.
 257 //
 258 // airportinfo(<id>);                   e.g. "KSFO"
 259 // airportinfo(<type>);                 type := ("airport"|"seaport"|"heliport")
 260 // airportinfo()                        same as  airportinfo("airport")
 261 // airportinfo(<lat>, <lon> [, <type>]);
 262 static naRef f_airportinfo(naContext c, naRef me, int argc, naRef* args)
 263 {
 264   nasal::CallContext ctx(c, argc, args);
 265   // TODO think of something comfortable to overload functions or use variable
 266   //      number/types of arguments.
 267
 268   std::string ident = "airport";
 269   SGGeod pos = globals->get_aircraft_position();
 270
 271   if( ctx.argc == 1 )
 272   {
 273     ident = ctx.requireArg<std::string>(0);
 274   }
 275   else if( ctx.argc >= 2 )
 276   {
 277     // Why are lat/lon swapped?
 278     pos = SGGeod::fromDeg( ctx.requireArg<double>(1),
 279                            ctx.requireArg<double>(0) );
 280
 281     if( ctx.argc >= 3 )
 282       ident = ctx.requireArg<std::string>(2);
 283
 284     if( ctx.argc > 3 )
 285       naRuntimeError(ctx.c, "airportinfo() with invalid function arguments");
 286   }
 287
 288   FGAirport::TypeRunwayFilter filter;
 289   if( !filter.fromTypeString(ident) )
 290     // user provided an <id>, hopefully
 291     return ctx.to_nasal(FGAirport::findByIdent(ident));
 292
 293   double maxRange = 10000.0; // expose this? or pick a smaller value?
 294   return ctx.to_nasal( FGAirport::findClosest(pos, maxRange, &filter) );
 295 }
 296
 297 //------------------------------------------------------------------------------
 298 naRef initNasalPositioned_cppbind(naRef globalsRef, naContext c, naRef gcSave)
 299 {
 300   NasalPositioned::init("FGPositioned")
 301     .member("id", &FGPositioned::ident)
 302     .member("ident", &FGPositioned::ident) // TODO to we really need id and ident?
 303     .member("name", &FGPositioned::name)
 304     .member("lat", &FGPositioned::latitude)
 305     .member("lon", &FGPositioned::longitude)
 306     .member("elevation", &FGPositioned::elevationM);
 307   NasalRunway::init("FGRunway")
 308     .bases<NasalPositioned>();
 309   NasalParking::init("FGParking")
 310     .bases<NasalPositioned>();
 311   NasalCommStation::init("CommStation")
 312     .bases<NasalPositioned>()
 313     .member("frequency", &flightgear::CommStation::freqMHz);
 314   NasalAirport::init("FGAirport")
 315     .bases<NasalPositioned>()
 316     .member("has_metar", &FGAirport::getMetar)
 317     .member("runways", &FGAirport::getRunwayMap)
 318     .member("helipads", &FGAirport::getHelipadMap)
 319     .member("taxiways", &FGAirport::getTaxiways)
 320     .member("pavements", &FGAirport::getPavements)
 321     .method("runway", &f_airport_runway)
 322     .method("helipad", &f_airport_runway)
 323     .method("tower", &FGAirport::getTowerLocation)
 324     .method("comms", &f_airport_comms)
 325     .method("sids", &f_airport_sids)
 326     .method("stars", &f_airport_stars)
 327     .method("getApproachList", f_airport_approaches)
 328     .method("parking", &f_airport_parking)
 329     .method("getSid", &FGAirport::findSIDWithIdent)
 330     .method("getStar", &FGAirport::findSTARWithIdent)
 331     .method("getIAP", &FGAirport::findApproachWithIdent)
 332     .method("tostring", &FGAirport::toString);
 333
 334   nasal::Hash globals(globalsRef, c),
 335               positioned( globals.createHash("positioned") );
 336
 337   positioned.set("airportinfo", &f_airportinfo);
 338
 339   return naNil();
 340 }