internal int AddMove(string player, int column)
{
VerifyColumnExists(column);
var row = GetRowForMove(column);
var move = new BoardMove(player, column, row);
return(AddMove(move));
}
private bool FourInARow_Row(BoardMove move)
{
int matchingPlayCount = 0;
var startingColumn = move.Column - (WinningMatches - 1) < 0 ? 0 : move.Column - (WinningMatches - 1);
int endingColumn = move.Column + (WinningMatches - 1) >= _columns ? _columns - 1 : move.Column + (WinningMatches - 1);
for (var i = startingColumn; i <= endingColumn && matchingPlayCount < WinningMatches; i++)
{
if (IsPlayerInSpot(move.Player, i, move.Row))
{
matchingPlayCount++;
}
else
{
matchingPlayCount = 0;
}
}
return(matchingPlayCount >= WinningMatches);
}
private bool FourInARow_Column(BoardMove move)
{
int matchingPlayCount = 0;
var startingRow = move.Row - (WinningMatches - 1) < 0 ? 0 : move.Row - (WinningMatches - 1);
int endingRow = move.Row;
for (var i = startingRow; i <= endingRow && matchingPlayCount < WinningMatches; i++)
{
if (IsPlayerInSpot(move.Player, move.Column, i))
{
matchingPlayCount++;
}
else
{
matchingPlayCount = 0;
}
}
return(matchingPlayCount >= WinningMatches);
}
private bool FourInARow_DescreasingDiag(BoardMove move)
{
int matchingPlayCount = 1;
var currentRow = move.Row + 1;
var currentCol = move.Column - 1;
while (currentRow < _rows && currentCol >= 0 && matchingPlayCount < WinningMatches)
{
if (IsPlayerInSpot(move.Player, currentCol, currentRow))
{
matchingPlayCount++;
}
else
{
break;
}
currentRow++;
currentCol--;
}
currentRow = move.Row - 1;
currentCol = move.Column + 1;
while (currentRow >= 0 && currentCol < _columns && matchingPlayCount < WinningMatches)
{
if (IsPlayerInSpot(move.Player, currentCol, currentRow))
{
matchingPlayCount++;
}
else
{
break;
}
currentRow--;
currentCol++;
}
return(matchingPlayCount >= WinningMatches);
}
private bool IsGameWon(BoardMove move)
{
if (FourInARow_Row(move))
{
return(true);
}
if (FourInARow_Column(move))
{
return(true);
}
if (FourInARow_IncreasingDiag(move))
{
return(true);
}
if (FourInARow_DescreasingDiag(move))
{
return(true);
}
return(false);
}