internal static Constant.GameState CheckGridForWinner(CellManager cm, IMarker m,
Constant.GameState currentGameState)
{
Constant.GameState result = currentGameState;
// Check winning conditions for the newly created move
if (cm.AllocCount == Constant.MaxOptions)
result = Constant.GameState.Tie;
else
{
// We only need to check the grid for the marker that has
// just been placed down.
result = CheckRows(cm, m, result);
result = CheckColumns(cm, m, result);
result = CheckDiagonals(cm, m, result);
}
return result;
}
private static Constant.GameState CheckDiagonals(CellManager cm, IMarker m,
Constant.GameState currentGameState)
{
Constant.GameState result = currentGameState;
if (result == Constant.GameState.Win)
return result;
int cnt = 0;
// Check leading diagonal.
for (int i = 0; i < Constant.GridSize; i++)
{
if (cm.Grid[i, i].Marker != null &&
cm.Grid[i, i].Marker.Equals(m))
cnt++;
}
if (cnt == Constant.GridSize)
return Constant.GameState.Win;
else
{
// Reset the counter, check antidiagonal.
cnt = 0;
for (int i = 0; i < Constant.GridSize; i++)
{
if (cm.Grid[i, Constant.GridSize - 1 - i].Marker != null &&
cm.Grid[i, Constant.GridSize - 1 - i].Marker.Equals(m))
cnt++;
}
if (cnt == Constant.GridSize)
return Constant.GameState.Win;
}
// No result was found on the diagonals.
return result;
}
private static Constant.GameState CheckColumns(CellManager cm, IMarker m,
Constant.GameState currentGameState)
{
Constant.GameState result = currentGameState;
if (result == Constant.GameState.Win)
return result;
for (int column = 0; column < Constant.GridSize; column++)
{
int cnt = 0;
for (int row = 0; row < Constant.GridSize; row++)
{
if (cm.Grid[row, column].Marker != null &&
cm.Grid[row, column].Marker.Equals(m))
cnt++;
}
if (cnt == Constant.GridSize)
return Constant.GameState.Win;
}
return result;
}