public int calculateWinner(GameBoardData gameBoard)
{
GridElementData[ , ] board = gameBoard.getGameBoard();
int rows = gameBoard.boardRows;
int columns = gameBoard.boardColumns;
int column, row, prev, count, playerAtField, rowCounter;
bool firstPlayerWon = false;
bool secondPlayerWon = false;
//check rows
for (column = 0; column < columns; column++)
{
count = 1;
prev = 0;
for (row = 0; row < rows; row++)
{
playerAtField = board[row, column].player;
if (playerAtField != prev)
{
prev = playerAtField;
count = 1;
}
else if (playerAtField == GameManager.FIRSTPLAYER) //first player
{
count++;
if (count >= GameManager.tokensToWin)
{
firstPlayerWon = true;
}
}
else if (playerAtField == GameManager.SECONDPLAYER) //second player
{
count++;
if (count >= GameManager.tokensToWin)
{
secondPlayerWon = true;
}
}
}
}
//check columns
for (row = 0; row < rows; row++)
{
count = 1;
prev = 0;
for (column = 0; column < columns; column++)
{
playerAtField = board[row, column].player;
if (playerAtField != prev)
{
prev = playerAtField;
count = 1;
}
else if (playerAtField == GameManager.FIRSTPLAYER) //first player
{
count++;
if (count >= GameManager.tokensToWin)
{
firstPlayerWon = true;
}
}
else if (playerAtField == GameManager.SECONDPLAYER) //second player
{
count++;
if (count >= GameManager.tokensToWin)
{
secondPlayerWon = true;
}
}
}
}
//check diagonal
for (column = 0; column < columns; column++)
{
count = 1;
prev = GameManager.NONE;
rowCounter = 0;
while (column + rowCounter < columns && rowCounter < rows)
{
playerAtField = board[rowCounter, column + rowCounter].player;
if (playerAtField != prev)
{
prev = playerAtField;
count = 1;
}
else if (playerAtField == GameManager.FIRSTPLAYER) //first player
{
count++;
if (count >= GameManager.tokensToWin)
{
firstPlayerWon = true;
}
}
else if (playerAtField == GameManager.SECONDPLAYER) //second player
{
count++;
if (count >= GameManager.tokensToWin)
{
secondPlayerWon = true;
}
}
rowCounter++;
}
}
for (row = 0; row < rows; row++)
{
count = 1;
prev = 0;
rowCounter = 0;
while (row + rowCounter < rows && rowCounter < columns)
{
playerAtField = board[row + rowCounter, rowCounter].player;
if (playerAtField != prev)
{
prev = playerAtField;
count = 1;
}
else if (playerAtField == GameManager.FIRSTPLAYER) //first player
{
count++;
if (count >= GameManager.tokensToWin)
{
firstPlayerWon = true;
}
}
else if (playerAtField == GameManager.SECONDPLAYER) //second player
{
count++;
if (count >= GameManager.tokensToWin)
{
secondPlayerWon = true;
}
}
rowCounter++;
}
}
for (column = 0; column < columns; column++)
{
count = 1;
prev = 0;
rowCounter = 0;
while (column - rowCounter >= 0 && rowCounter < rows)
{
playerAtField = board[rowCounter, column - rowCounter].player;
if (playerAtField != prev)
{
prev = playerAtField;
count = 1;
}
else if (playerAtField == GameManager.FIRSTPLAYER) //first player
{
count++;
if (count >= GameManager.tokensToWin)
{
firstPlayerWon = true;
}
}
else if (playerAtField == GameManager.SECONDPLAYER) //second player
{
count++;
if (count >= GameManager.tokensToWin)
{
secondPlayerWon = true;
}
}
rowCounter++;
}
}
for (row = 0; row < rows; row++)
{
count = 1;
prev = 0;
rowCounter = 0;
while (row - rowCounter >= 0 && rowCounter < columns)
{
playerAtField = board[row - rowCounter, rowCounter].player;
if (playerAtField != prev)
{
prev = playerAtField;
count = 1;
}
else if (playerAtField == GameManager.FIRSTPLAYER) //first player
{
count++;
if (count >= GameManager.tokensToWin)
{
firstPlayerWon = true;
}
}
else if (playerAtField == GameManager.SECONDPLAYER) //second player
{
count++;
if (count >= GameManager.tokensToWin)
{
secondPlayerWon = true;
}
}
rowCounter++;
}
}
if (!movePossible() || (firstPlayerWon && secondPlayerWon))
{
return(GameManager.DRAW);
}
else if (firstPlayerWon)
{
return(GameManager.FIRSTPLAYER);
}
else if (secondPlayerWon)
{
return(GameManager.SECONDPLAYER);
}
else
{
return(GameManager.NONE);
}
}