public RoverResponse Post([FromBody] RoverInstructions value)
{
// REGular EXpression for checking instructions are limited to R, M, and L characters.
Regex instructionsRegex = new Regex(@"^[RML]+$");
// Check JSON values are within constraints
if (value.RoverId.Length > 10 || value.MovementInstruction.Length > 100)
{
return(new RoverResponse {
Message = "Rover ID and/or Movement Instructions are over the allowed limit. Rover ID should be less than 10 characters. Instructions should be less than 100 characters.", CurrentPosition = "()"
});
}
else if (!instructionsRegex.IsMatch(value.MovementInstruction))
{
return(new RoverResponse {
Message = "Movement Instructions are incorrect. Instructions can only have values of 'R', 'L', and/or 'M'.", CurrentPosition = "()"
});
}
// Retreive rover from Session Storage. If rover does not exist, then create a new one.
Rover rover = SessionRoverExtension.GetRover <Rover>(HttpContext.Session, value.RoverId) == null ? new Rover(value.RoverId, "N", 0, 0) : SessionRoverExtension.GetRover <Rover>(HttpContext.Session, value.RoverId);
// Execute all instructions sent for rover.
rover = RoverOperationsService.ExecuteInstructions(value.MovementInstruction, rover);
// Save rover to Session Storage, and return result.
SessionRoverExtension.SetRover(HttpContext.Session, value.RoverId, rover);
return(new RoverResponse {
Message = $"Rover {rover.RoverId} has moved. Orientation is: {rover.RoverOrientation}.", CurrentPosition = $"({rover.RoverX},{rover.RoverY})"
});
}
public RoverResponse Get(string id)
{
// Check JSON values are within constraints
if (id.Length > 10)
{
return(new RoverResponse {
Message = "Rover ID is over the allowed limit. Rover ID should be less than 10 characters.", CurrentPosition = "()"
});
}
Rover rover = SessionRoverExtension.GetRover <Rover>(HttpContext.Session, id);
if (rover == null)
{
return new RoverResponse {
Message = "Rover does not exist.", CurrentPosition = "()"
}
}
;
return(new RoverResponse {
Message = $"Rover {rover.RoverId}'s orientation is: {rover.RoverOrientation}", CurrentPosition = $"({rover.RoverX},{rover.RoverY})"
});
}