Expose get_filename to scripting under worldmap.settings. (#2660)

* expose `get_filename` to scripting under `worldmap.settings`

* add missing `const`s

please tell me i put them in the right place :sadstare:

* actually add missing consts

thanks Tobbi

* one last const fix

src/scripting/worldmap_sector.cpp

@@ -59,6 +59,13 @@ WorldMapSector::move_to_spawnpoint(const std::string& spawnpoint)
   m_parent->move_to_spawnpoint(spawnpoint);
 }
 
+std::string
+WorldMapSector::get_filename() const
+{
+  SCRIPT_GUARD_WORLDMAP;
+  return worldmap.get_filename();
+}
+
 } // namespace scripting
 
 /* EOF */

src/scripting/worldmap_sector.hpp

@@ -83,6 +83,12 @@ class WorldMapSector final : public GameObjectManager
    * @param string $spawnpoint
    */
   void move_to_spawnpoint(const std::string& spawnpoint);
+
+  /**
+   * Gets the path to the worldmap file. Useful for saving worldmap specific data.
+   */
+  std::string get_filename() const;
+
 };
 
 } // namespace scripting

src/scripting/wrapper.cpp

@@ -11512,6 +11512,33 @@ static SQInteger WorldMapSector_move_to_spawnpoint_wrapper(HSQUIRRELVM vm)
 
 }
 
+static SQInteger WorldMapSector_get_filename_wrapper(HSQUIRRELVM vm)
+{
+  SQUserPointer data;
+  if(SQ_FAILED(sq_getinstanceup(vm, 1, &data, nullptr, SQTrue)) || !data) {
+    sq_throwerror(vm, _SC("'get_filename' called without instance"));
+    return SQ_ERROR;
+  }
+  scripting::WorldMapSector* _this = reinterpret_cast<scripting::WorldMapSector*> (data);
+
+
+  try {
+    std::string return_value = _this->get_filename();
+
+    assert(return_value.size() < static_cast<size_t>(std::numeric_limits<SQInteger>::max()));
+    sq_pushstring(vm, return_value.c_str(), static_cast<SQInteger>(return_value.size()));
+    return 1;
+
+  } catch(std::exception& e) {
+    sq_throwerror(vm, e.what());
+    return SQ_ERROR;
+  } catch(...) {
+    sq_throwerror(vm, _SC("Unexpected exception while executing function 'get_filename'"));
+    return SQ_ERROR;
+  }
+
+}
+
 static SQInteger display_wrapper(HSQUIRRELVM vm)
 {
   return scripting::display(vm);
@@ -15661,6 +15688,13 @@ void register_supertux_wrapper(HSQUIRRELVM v)
     throw SquirrelError(v, "Couldn't register function 'move_to_spawnpoint'");
   }
 
+  sq_pushstring(v, "get_filename", -1);
+  sq_newclosure(v, &WorldMapSector_get_filename_wrapper, 0);
+  sq_setparamscheck(v, SQ_MATCHTYPEMASKSTRING, ".");
+  if(SQ_FAILED(sq_createslot(v, -3))) {
+    throw SquirrelError(v, "Couldn't register function 'get_filename'");
+  }
+
   if(SQ_FAILED(sq_createslot(v, -3))) {
     throw SquirrelError(v, "Couldn't register class 'WorldMapSector'");
   }

src/worldmap/worldmap.cpp

@@ -334,6 +334,12 @@ WorldMap::set_sector(const std::string& name, const std::string& spawnpoint,
     m_sector->move_to_spawnpoint(spawnpoint);
 }
 
+std::string
+WorldMap::get_filename() const
+{
+  return m_map_filename;
+}
+
 } // namespace worldmap
 
 /* EOF */

src/worldmap/worldmap.hpp

@@ -86,6 +86,8 @@ class WorldMap final : public Currenton<WorldMap>
   void set_sector(const std::string& name, const std::string& spawnpoint = "",
                   bool perform_full_setup = true);
 
+  std::string get_filename() const;
+
 private:
   void on_escape_press();