public GameInfo Parse(TextReader source)
{
_partial.Length = 0;
_handle = HandleHeaderStart;
_moveVariations.Clear();
var gameInfo = new GameInfo();
foreach (var ch in source.GenerateFrom())
{
var success = _handle(ch, gameInfo);
if (!success)
{
gameInfo.HasError = true;
break;
}
if (_handle == Done)
{
break;
}
}
if (!new Func<char, GameInfo, bool>[] { Done }.Contains(_handle))
{
gameInfo.HasError = true;
gameInfo.ErrorMessage = "Unexpected end of game info text.";
}
return gameInfo;
}
private bool HandleGameComment(char ch, GameInfo gameInfo)
{
if (ch == '}')
{
gameInfo.Comment = _partial.ToString();
_partial.Length = 0;
_handle = HandleMoveNumber;
return true;
}
_partial.Append(ch);
return true;
}
private bool HandleHeaderBody(char ch, GameInfo gameInfo)
{
if (ch != ']')
{
_partial.Append(ch);
return true;
}
var headerParts = _partial.ToString().Split(' ');
_partial.Length = 0;
gameInfo.Headers.Add(headerParts[0], headerParts[1].Trim('"'));
_handle = HandleHeaderStart;
return true;
}
private bool HandleHeaderStart(char ch, GameInfo gameInfo)
{
if (ch == '[')
{
_handle = HandleHeaderBody;
return true;
}
if (Char.IsWhiteSpace(ch))
{
return true;
}
if (ch == '{')
{
_partial.Length = 0;
_handle = HandleGameComment;
return true;
}
if (Char.IsDigit(ch))
{
_partial.Length = 0;
_handle = HandleMoveNumber;
return HandleMoveNumber(ch, gameInfo);
}
return false;
}
private static bool Done(char ch, GameInfo gameInfo)
{
return true;
}
private bool HandleSymbolicMoveAnnotation(char ch, GameInfo gameInfo)
{
if (ch == '?' || ch == '!')
{
_partial.Append(ch);
return true;
}
gameInfo.Moves.Last().Annotation = SymbolicMoveAnnotation.GetFor(_partial.ToString()).Id;
_partial.Length = 0;
_handle = HandleMoveText;
return HandleMoveText(ch, gameInfo);
}
private bool HandleMoveVariation(char ch, GameInfo gameInfo)
{
if (ch == '(')
{
_moveVariations.Push(_partial);
_partial = new StringBuilder();
_partial.Append(ch);
return true;
}
if (ch == ')')
{
if (_moveVariations.Count == 0)
{
gameInfo.Moves.Last().Variation = _partial.ToString();
_partial.Length = 0;
_handle = HandleMoveText;
}
else
{
var temp = _partial;
_partial = _moveVariations.Pop();
_partial.Append(temp);
_partial.Append(ch);
}
return true;
}
_partial.Append(ch);
return true;
}
private bool HandleMoveText(char ch, GameInfo gameInfo)
{
if (Char.IsWhiteSpace(ch))
{
if (_partial.Length == 0)
{
return true;
}
if (_partial.ToString() == gameInfo.Headers["Result"])
{
_handle = Done;
return true;
}
var move = _algebraicMoveParser.Parse(_partial.ToString());
move.Number = _moveNumber;
gameInfo.Moves.Add(move);
_partial.Length = 0;
return true;
}
switch (ch)
{
case '.':
return HandleMoveNumber(ch, gameInfo);
case '{':
{
_partial.Length = 0;
_handle = HandleMoveComment;
return true;
}
case '(':
{
_partial.Length = 0;
_handle = HandleMoveVariation;
return true;
}
case '$':
{
_partial.Length = 0;
_handle = HandleMoveAnnotation;
return true;
}
case '?':
case '!':
{
var move = _algebraicMoveParser.Parse(_partial.ToString());
move.Number = _moveNumber;
gameInfo.Moves.Add(move);
_partial.Length = 0;
_handle = HandleSymbolicMoveAnnotation;
return HandleSymbolicMoveAnnotation(ch, gameInfo);
}
}
_partial.Append(ch);
return true;
}
private bool HandleMoveNumber(char ch, GameInfo gameInfo)
{
if (Char.IsWhiteSpace(ch))
{
return true;
}
if (Char.IsDigit(ch))
{
_partial.Append(ch);
return true;
}
if (ch == '.')
{
_moveNumber = Int32.Parse(_partial.ToString());
_partial.Length = 0;
_handle = HandleMoveText;
return true;
}
return false;
}
private bool HandleMoveAnnotation(char ch, GameInfo gameInfo)
{
if (Char.IsDigit(ch))
{
_partial.Append(ch);
return true;
}
if (_partial.Length > 0)
{
gameInfo.Moves.Last().Annotation = Int32.Parse(_partial.ToString());
_partial.Length = 0;
}
_handle = HandleMoveText;
return HandleMoveText(ch, gameInfo);
}
