Request Facility Data

[joriskleiber]

This adds the functionality to request airport data as follows:

#[facility_definition("AIRPORT")]
struct AirportData {
    #[name = "N_JETWAYS"]
     jetway_count: i32,
     #[name = "N_RUNWAYS"]
     runway_count: i32,
     #[child_facility]
     taxi_paths: Vec<TaxiPathData>,
 }

 #[facility_definition("TAXI_PATH")]
 #[derive(Debug, Clone)]
 struct TaxiPathData {
     #[name = "TYPE"]
     taxiway_type: i32,
}
 
sim.add_facility_definition::<AirportData>();

let mut data: HashMap<SIMCONNECT_DATA_REQUEST_ID, AirportData> = HashMap::new();

...
     SimConnectRecv::FacilityData(e) => {
          let user_request_id = SIMCONNECT_DATA_REQUEST_ID(e.UserRequestId);
          let data_type: SIMCONNECT_FACILITY_DATA_TYPE = unsafe { mem::transmute(e.Type) };

          match data_type {
               SIMCONNECT_FACILITY_DATA_TYPE::SIMCONNECT_FACILITY_DATA_AIRPORT => {
                    let airport_data = e.into::<AirportData>(&simconnect).unwrap();
                    data.insert(user_request_id, airport_data);
               }

               SIMCONNECT_FACILITY_DATA_TYPE::SIMCONNECT_FACILITY_DATA_TAXI_PATH => {
                    let taxi_path = e.into::<TaxiPathData>(&simconnect).unwrap();

                    if let Some(airport) = data.get_mut(&user_request_id) {
                         airport.taxi_paths.push(taxi_path.clone());
                    }
               }    
 ...

Remaining tasks:

• Ensure that each child_facility has a unique type.
• Fix correct type checking for into().
• Add example.

I will complete the remaining tasks on this draft when it is likely that this PR will be merged