private void HandleEngineOutputReceived(string outputText)
{
if (outputText == null || !this.isEval)
{
return;
}
EvaluatedLine line = null;
lock (this.bestLines)
{
if (this.PositionFen == null)
{
throw new ArgumentException($"Cannot handle engine output because PositionFen is null.");
}
line = this.lineParser.ParseLineText(this.PositionFen, outputText);
if (line == null)
{
return;
}
bool containsUpdate = false;
if (!this.bestLines.ContainsKey(line.LineRank))
{
this.bestLines.Add(line.LineRank, line);
containsUpdate = true;
}
else if (line.LineSan.Split().Length >= this.bestLines[line.LineRank].LineSan.Split().Length)
{
this.bestLines[line.LineRank] = line;
containsUpdate = true;
}
if (!containsUpdate)
{
return;
}
}
var segment = new EngineOutputSegment()
{
Output = outputText,
Line = line,
BestLines = this.bestLines,
};
this.ReceivedEvaluationUpdate?.Invoke(this, segment);
}
/// <summary>
/// Parse a single UCI evaluation output line.
/// </summary>
/// <param name="fenPosition">The starting FEN (used for SAN context).</param>
/// <param name="text">The UCI output.</param>
/// <returns>The parsed line.</returns>
public EvaluatedLine ParseLineText(string fenPosition, string text)
{
var iterator = new WordIterator(text);
var line = new EvaluatedLine();
while (iterator.HasRemainingWords)
{
string nextKeyword = iterator.SeekAny(LineKeywords);
if (nextKeyword == null)
{
break;
}
switch (nextKeyword)
{
case Depth:
line.Depth = iterator.NextWordAsInt();
break;
case MultiPV:
line.LineRank = iterator.NextWordAsInt();
break;
case PV:
var words = new List <string>();
while (iterator.HasRemainingWords)
{
words.Add(iterator.NextWord());
}
line.LineUci = string.Join(' ', words);
break;
case Score:
var scoreType = iterator.NextWord();
if (scoreType == ScoreMate)
{
line.Evaluation = new EvaluationScore()
{
MovesUntilMate = iterator.NextWordAsInt(),
};
}
else if (scoreType == ScoreCentipawn)
{
line.Evaluation = new EvaluationScore()
{
Centipawns = iterator.NextWordAsInt(),
};
}
break;
}
}
if (line.Depth == 0 || line.LineRank == 0 ||
line.LineUci == null || line.Evaluation == null)
{
return(null);
}
var lineParts = line.LineUci.Split(' ').ToList();
var lineSan = this.UciToSan(fenPosition, lineParts);
line.LineSan = string.Join(' ', lineSan);
return(line);
}
/// <summary>
/// Initializes a new instance of the <see cref="LineReceivedEventArgs"/> struct.
/// </summary>
/// <param name="line">The parsed evaluated line.</param>
public LineReceivedEventArgs(EvaluatedLine line)
{
this.Line = line;
}
