/// <summary>
/// Parses a SGF game tree
/// </summary>
/// <param name="input">Input</param>
/// <param name="inputPosition">Current input position</param>
/// <returns>SGF game tree</returns>
private SgfGameTree ParseGameTree(string input, ref int inputPosition)
{
if (input[inputPosition] != '(')
{
throw new SgfParseException($"No gameTree node found on input position {inputPosition}");
}
inputPosition++;
SkipInputWhitespace(input, ref inputPosition);
//parse sequence
SgfSequence sequence = ParseSequence(input, ref inputPosition);
SkipInputWhitespace(input, ref inputPosition);
//parse children
List <SgfGameTree> children = new List <SgfGameTree>();
while (inputPosition < input.Length && input[inputPosition] == '(')
{
SgfGameTree child = ParseGameTree(input, ref inputPosition);
children.Add(child);
SkipInputWhitespace(input, ref inputPosition);
}
//check proper ending of the game tree
if (inputPosition == input.Length || input[inputPosition] != ')')
{
throw new SgfParseException($"SGF gameTree was not properly terminated with ) at {inputPosition}");
}
inputPosition++;
return(new SgfGameTree(sequence, children));
}
/// <summary>
/// Serializes a SGF sequence
/// </summary>
/// <param name="sequence">Sequence</param>
/// <returns>Serialized sequence</returns>
private string SerializeSequence([NotNull] SgfSequence sequence)
{
if (sequence == null)
{
throw new ArgumentNullException(nameof(sequence));
}
StringBuilder builder = new StringBuilder();
foreach (var node in sequence)
{
builder.Append(SerializeNode(node));
if (_createNewlines)
{
builder.AppendLine();
}
}
return(builder.ToString());
}
