static IEnumerable <Route> ServeRequest(Request request)
{
(IGraphDatabase cars, IGraphDatabase trains) = MockData.InitDatabases();
//if (!ValidateRequest(request))
// return null;
FilteredDatabase database = new FilteredDatabase(new MergedDatabase(cars, trains), request.Filter);
IRequestServer server = new RequestValidator(
new CostServer(
new TimeServer(
new BFSServer(
new DFSServer(
new DijkstraServer())))));
return(server.Solve(request, null, database));
//if (request.Problem == "Cost")
//{
// var problem = new CostProblem(request.From, request.To);
// problem.Graph = database;
// return problem.Solve(request.Solver);
//}
//if (request.Problem == "Time")
//{
// var problem = new TimeProblem(request.From, request.To);
// problem.Graph = database;
// return problem.Solve(request.Solver);
//}
//throw new ArgumentException();
}