/// <summary>
/// Verifies if the passed in position is valid or not.
/// </summary>
/// <param name="battleship">battleship</param>
/// <param name="boardSize">boardSize</param>
/// <returns>Tuple<bool, int, Orientation></returns>
public Tuple <bool, int, Orientation> IsValidPosition(BattleshipRequest battleship, int boardSize)
{
int shipEndCoordinate = -1;
Orientation orientation;
switch (battleship?.Orientation?.ToUpper())
{
case Constants.Orientation.VERTICAL:
shipEndCoordinate = battleship.Position.Y + battleship.Length - 1;
orientation = Orientation.Vertical;
break;
case Constants.Orientation.HORIZONTAL:
shipEndCoordinate = battleship.Position.X + battleship.Length - 1;
orientation = Orientation.Horizontal;
break;
default:
orientation = Orientation.Invalid;
break;
}
var validRange = Enumerable.Range(1, boardSize);
var isValid = validRange.Contains(battleship.Position.X) &&
validRange.Contains(battleship.Position.Y) &&
validRange.Contains(shipEndCoordinate);
return(Tuple.Create(isValid, shipEndCoordinate, orientation));
}
/// <summary>
/// Add ship to the board.
/// </summary>
/// <param name="battleship">battleship</param>
/// <returns>string</returns>
public string PlaceShipOnBoard(BattleshipRequest battleship)
{
var(isCreated, size, boardCells) = validationService.IsBattleBoardCreated();
if (!isCreated)
{
return(Constants.Messages.BOARD_NOT_CREATED_YET);
}
if (validationService.IsShipPlacedOnBoard())
{
return(Constants.Messages.SHIP_IS_ALREADY_PLACED);
}
var(isValid, endCoordinate, orientation) = validationService.IsValidPosition(battleship, size - 1);
if (!isValid)
{
return(Constants.Messages.CANNOT_PLACE_OUTSIDE_BOARD);
}
if (!validationService.IsBoardCellEmpty(battleship.Position.X,
battleship.Position.Y,
endCoordinate, orientation))
{
return(Constants.Messages.CELL_IS_OCCUPIED);
}
var battleBoard = new BattleBoard
{
BoardCells = boardCells,
BoardSize = size - 1,
Length = battleship.Length
};
if (orientation.Equals(Orientation.Horizontal))
{
for (var i = battleship.Position.X; i <= endCoordinate; i++)
{
battleBoard.BoardCells[i, battleship.Position.Y] = new BoardCell {
IsEmpty = false, IsHit = false
};
}
}
if (orientation.Equals(Orientation.Vertical))
{
for (var i = battleship.Position.Y; i <= endCoordinate; i++)
{
battleBoard.BoardCells[battleship.Position.X, i] = new BoardCell {
IsEmpty = false, IsHit = false
};
}
}
cacheService.CreateOrUpdateCache(Constants.CacheKeys.IS_SHIP_PLACED_ON_BOARD, true);
cacheService.CreateOrUpdateCache(Constants.CacheKeys.BATTLE_BOARD, battleBoard);
return(string.Empty);
}
public IActionResult PlaceShipOnBoard(BattleshipRequest battleship)
{
if (!ModelState.IsValid)
{
return(BadRequest());
}
var response = trackerService.PlaceShipOnBoard(battleship);
return(Ok(response));
}