public PlaceGamePieceResponse PlaceGamePiece(int columnNumber, bool isPlayerOnesTurn)
{
var response = new PlaceGamePieceResponse();
if (!IsValidColumn(columnNumber))
{
response.PositionStatus = PositionStatus.Invalid;
return(response);
}
// check for full column
var topPositionInColumn = new BoardPosition(6, columnNumber);
if (CustomComparer.PositionHistoryCompare(BoardHistory, topPositionInColumn, PositionHistory.Player1Piece) ||
CustomComparer.PositionHistoryCompare(BoardHistory, topPositionInColumn, PositionHistory.Player2Piece))
{
response.PositionStatus = PositionStatus.ColumnFull;
return(response);
}
var rowNumber = DetermineRowNumber(columnNumber);
if (rowNumber == 0) //error, somehow a bad column input got through or board was drawn incorrectly
{
return(null);
}
var position = new BoardPosition(rowNumber, columnNumber);
response = CheckForVictory(position, isPlayerOnesTurn);
return(response);
}
private int DetermineRowNumber(int columnNumber)
{
for (int i = 1; i < 7; i++)
{
var loopPosition = new BoardPosition(i, columnNumber);
if (CustomComparer.PositionHistoryCompare(BoardHistory, loopPosition,
PositionHistory.Empty))
{
return(i);
}
}
return(0);
}
private bool PlayerVictoryCheck(PositionHistory pieceToLookFor, BoardPosition position)
{
var piecesInARow = 1;
// starting with the right/left check
// check the right
if (CustomComparer.PositionHistoryCompare(BoardHistory, position, pieceToLookFor, 0, 1))
{
_winningPositionValues.Add(position.RowPosition, position.ColumnPosition + 1);
piecesInARow++;
if (CustomComparer.PositionHistoryCompare(BoardHistory, position, pieceToLookFor, 0, 2))
{
_winningPositionValues.Add(position.RowPosition, position.ColumnPosition + 2);
piecesInARow++;
if (CustomComparer.PositionHistoryCompare(BoardHistory, position, pieceToLookFor, 0, 3))
{
_winningPositionValues.Add(position.RowPosition, position.ColumnPosition + 3);
piecesInARow++;
}
}
}
// then left
if (CustomComparer.PositionHistoryCompare(BoardHistory, position, pieceToLookFor, 0, -1))
{
_winningPositionValues.Add(position.RowPosition, position.ColumnPosition - 1);
piecesInARow++;
if (CustomComparer.PositionHistoryCompare(BoardHistory, position, pieceToLookFor, 0, -2))
{
_winningPositionValues.Add(position.RowPosition, position.ColumnPosition - 2);
piecesInARow++;
if (CustomComparer.PositionHistoryCompare(BoardHistory, position, pieceToLookFor, 0, -3))
{
_winningPositionValues.Add(position.RowPosition, position.ColumnPosition - 3);
piecesInARow++;
}
}
}
if (piecesInARow >= 4)
{
_winningPositionValues.Add(position.RowPosition, position.ColumnPosition);
return(true);
}
_winningPositionValues.Clear();
piecesInARow = 1; // reset count for next line check
// check diagonal /
// check upper right
if (CustomComparer.PositionHistoryCompare(BoardHistory, position, pieceToLookFor, 1, 1))
{
_winningPositionValues.Add(position.RowPosition + 1, position.ColumnPosition + 1);
piecesInARow++;
if (CustomComparer.PositionHistoryCompare(BoardHistory, position, pieceToLookFor, 2, 2))
{
_winningPositionValues.Add(position.RowPosition + 2, position.ColumnPosition + 2);
piecesInARow++;
if (CustomComparer.PositionHistoryCompare(BoardHistory, position, pieceToLookFor, 3, 3))
{
_winningPositionValues.Add(position.RowPosition + 3, position.ColumnPosition + 3);
piecesInARow++;
}
}
}
// then lower left
if (CustomComparer.PositionHistoryCompare(BoardHistory, position, pieceToLookFor, -1, -1))
{
_winningPositionValues.Add(position.RowPosition - 1, position.ColumnPosition - 1);
piecesInARow++;
if (CustomComparer.PositionHistoryCompare(BoardHistory, position, pieceToLookFor, -2, -2))
{
_winningPositionValues.Add(position.RowPosition - 2, position.ColumnPosition - 2);
piecesInARow++;
if (CustomComparer.PositionHistoryCompare(BoardHistory, position, pieceToLookFor, -3, -3))
{
_winningPositionValues.Add(position.RowPosition - 3, position.ColumnPosition - 3);
piecesInARow++;
}
}
}
if (piecesInARow >= 4)
{
_winningPositionValues.Add(position.RowPosition, position.ColumnPosition);
return(true);
}
_winningPositionValues.Clear();
piecesInARow = 1;
// check top/bottom line
// check top
if (CustomComparer.PositionHistoryCompare(BoardHistory, position, pieceToLookFor, 1, 0))
{
_winningPositionValues.Add(position.RowPosition + 1, position.ColumnPosition);
piecesInARow++;
if (CustomComparer.PositionHistoryCompare(BoardHistory, position, pieceToLookFor, 2, 0))
{
_winningPositionValues.Add(position.RowPosition + 2, position.ColumnPosition);
piecesInARow++;
if (CustomComparer.PositionHistoryCompare(BoardHistory, position, pieceToLookFor, 3, 0))
{
_winningPositionValues.Add(position.RowPosition + 3, position.ColumnPosition);
piecesInARow++;
}
}
}
// then bottom
if (CustomComparer.PositionHistoryCompare(BoardHistory, position, pieceToLookFor, -1, 0))
{
_winningPositionValues.Add(position.RowPosition - 1, position.ColumnPosition);
piecesInARow++;
if (CustomComparer.PositionHistoryCompare(BoardHistory, position, pieceToLookFor, -2, 0))
{
_winningPositionValues.Add(position.RowPosition - 2, position.ColumnPosition);
piecesInARow++;
if (CustomComparer.PositionHistoryCompare(BoardHistory, position, pieceToLookFor, -3, 0))
{
_winningPositionValues.Add(position.RowPosition - 3, position.ColumnPosition);
piecesInARow++;
}
}
}
if (piecesInARow >= 4)
{
_winningPositionValues.Add(position.RowPosition, position.ColumnPosition);
return(true);
}
_winningPositionValues.Clear();
piecesInARow = 1;
// check diagonal \
// check upper left
if (CustomComparer.PositionHistoryCompare(BoardHistory, position, pieceToLookFor, 1, -1))
{
_winningPositionValues.Add(position.RowPosition + 1, position.ColumnPosition - 1);
piecesInARow++;
if (CustomComparer.PositionHistoryCompare(BoardHistory, position, pieceToLookFor, 2, -2))
{
_winningPositionValues.Add(position.RowPosition + 2, position.ColumnPosition - 2);
piecesInARow++;
if (CustomComparer.PositionHistoryCompare(BoardHistory, position, pieceToLookFor, 3, -3))
{
_winningPositionValues.Add(position.RowPosition + 3, position.ColumnPosition - 3);
piecesInARow++;
}
}
}
// then lower right
if (CustomComparer.PositionHistoryCompare(BoardHistory, position, pieceToLookFor, -1, 1))
{
_winningPositionValues.Add(position.RowPosition - 1, position.ColumnPosition + 1);
piecesInARow++;
if (CustomComparer.PositionHistoryCompare(BoardHistory, position, pieceToLookFor, -2, 2))
{
_winningPositionValues.Add(position.RowPosition - 2, position.ColumnPosition + 2);
piecesInARow++;
if (CustomComparer.PositionHistoryCompare(BoardHistory, position, pieceToLookFor, -3, 3))
{
_winningPositionValues.Add(position.RowPosition - 3, position.ColumnPosition + 3);
piecesInARow++;
}
}
}
if (piecesInARow >= 4)
{
_winningPositionValues.Add(position.RowPosition, position.ColumnPosition);
return(true);
}
_winningPositionValues.Clear();
return(false);
}