/**
* Update the game state according to move/command string from a player.
* @param str The move or command to process.
* @return True if str was understood, false otherwise.
*/
public bool processstring(string str)
{
if (handleCommand(str))
{
return(true);
}
if (getGameState() != GameState.ALIVE)
{
return(false);
}
Move m = TextIO.stringToMove(pos, str);
if (m == null)
{
return(false);
}
UndoInfo ui = new UndoInfo();
pos.makeMove(m, ui);
TextIO.fixupEPSquare(pos);
while (currentMove < moveList.Count)
{
moveList.RemoveAt(currentMove);
uiInfoList.RemoveAt(currentMove);
drawOfferList.RemoveAt(currentMove);
}
moveList.Add(m);
uiInfoList.Add(ui);
drawOfferList.Add(pendingDrawOffer);
pendingDrawOffer = false;
currentMove++;
return(true);
}
private bool handleDrawCmd(string drawCmd)
{
if (drawCmd.StartsWith("rep") || drawCmd.StartsWith("50"))
{
bool rep = drawCmd.StartsWith("rep");
Move m = null;
string ms = drawCmd.Substring(drawCmd.IndexOf(" ") + 1);
if (ms.Length > 0)
{
m = TextIO.stringToMove(pos, ms);
}
bool valid;
if (rep)
{
valid = false;
List <Position> oldPositions = new List <Position>();
Position tmpPos;
if (m != null)
{
UndoInfo ui = new UndoInfo();
tmpPos = new Position(pos);
tmpPos.makeMove(m, ui);
oldPositions.Add(tmpPos);
}
oldPositions.Add(pos);
tmpPos = pos;
for (int i = currentMove - 1; i >= 0; i--)
{
tmpPos = new Position(tmpPos);
tmpPos.unMakeMove(moveList[i], uiInfoList[i]);
oldPositions.Add(tmpPos);
}
int repetitions = 0;
Position firstPos = oldPositions[0];
for (int i = 0; i < oldPositions.Count; i++)
{
Position p = oldPositions[i];
if (p.drawRuleEquals(firstPos))
{
repetitions++;
}
}
if (repetitions >= 3)
{
valid = true;
}
}
else
{
Position tmpPos = new Position(pos);
if (m != null)
{
UndoInfo ui = new UndoInfo();
tmpPos.makeMove(m, ui);
}
valid = tmpPos.halfMoveClock >= 100;
}
if (valid)
{
drawState = rep ? GameState.DRAW_REP : GameState.DRAW_50;
drawStateMoveStr = null;
if (m != null)
{
drawStateMoveStr = TextIO.moveTostring(pos, m, false);
}
}
else
{
pendingDrawOffer = true;
if (m != null)
{
processstring(ms);
}
}
return(true);
}
else if (drawCmd.StartsWith("offer "))
{
pendingDrawOffer = true;
string ms = drawCmd.Substring(drawCmd.IndexOf(" ") + 1);
if (TextIO.stringToMove(pos, ms) != null)
{
processstring(ms);
}
return(true);
}
else if (drawCmd == "accept")
{
if (haveDrawOffer())
{
drawState = GameState.DRAW_AGREE;
}
return(true);
}
else
{
return(false);
}
}