/// <summary>
/// Get a flight plan from the database and return it.
/// </summary>
/// <param name="id"> The id of the flight plan. </param>
/// <returns> The flight plan. </returns>
public async Task <FlightPlan> GetFlightPlan(string id)
{
// Try get the flight plan from the local data base.
FlightPlan local = await flightsDB.GetFlightPlan(id);
if (local != null)
{
return(local);
}
/* If flight plan not in local data base, try to retrieve it from an
* external server.
* Get the server in which the flight plan is located. */
FlightServer relevantServer = await flightsServersDB.GetFlightServer(id);
if (relevantServer != null)
{
// Ask the external server for the flight plan.
Server server = await serversDB.GetServer(relevantServer.ServerId);
IHTTPClient client = new HTTPClient(server);
return(await client.GetFlightPlan(id));
}
return(null);
}
