public DefaultFormat Build(string id, string format)
{
var formatArray = new List <Func <string> >();
var mayRequestVariables = new HashSet <string>();
var rawFormatContent = format;
while (true)
{
var match = calcRegex.Match(format);
if (!match.Success)
{
break;
}
if (match.Index != 0)
{
var part = format.Substring(0, match.Index);
formatArray.Add(() => part);
format = format.Substring(match.Index);
}
var expr = match.Groups[2].Value;
var astNode = parser.Parse(expr);
var exprFunc = converter.ConvertAstToComplexLambdaWithDefault(astNode);
foreach (var variable in parser.AnalyseMayRequestVariables(astNode))
{
mayRequestVariables.Add(variable);
}
var roundLength = int.TryParse(match.Groups[3].Value, out var d) ? d : -1;
formatArray.Add(() => {
var val = exprFunc();
if (val.ValueType == ValueBase.Type.String || roundLength < 0)
{
return(val.ValueToString());
}
return(((NumberValue)val).Value.ToString("F" + roundLength));
});
format = format.Substring(match.Length);
}
if (format.Length > 0)
{
formatArray.Add(() => format);
}
var sb = new StringBuilder();
var formatFunc = new Func <string>(() =>
{
sb.Clear();
foreach (var func in formatArray)
{
sb.Append(func());
}
return(sb.ToString());
});
return(new DefaultFormat(id, mayRequestVariables, formatFunc));
}