public static string ValidateInput(string sourceName)
{
try
{
var parsed = WarewolfDataEvaluationCommon.ParseLanguageExpression(sourceName, 0);
if (parsed.IsComplexExpression)
{
var complex = (LanguageAST.LanguageExpression.ComplexExpression)parsed;
if (complex.Item
.Any(x => x.IsRecordSetNameExpression))
{
return("Cannot specify a Recordset as part of a comma seperated list of expressions");
}
if (complex.Item.Count() < 3 ||
complex.Item.Count() % 2 != 1 ||
// ReSharper disable MaximumChainedReferences
!Enumerable.Range(1, complex.Item.Count() - 1)
.Where(i => i % 2 == 1)
.Select(i =>
WarewolfDataEvaluationCommon.LanguageExpressionToString(
complex.Item.ElementAt(i)
) == ",")
.Aggregate((a, b) => a && b))
// ReSharper restore MaximumChainedReferences
{
return("Problem with input: expressions must be comma seperated");
}
}
else if (!parsed.IsRecordSetNameExpression &&
!parsed.IsRecordSetExpression &&
!parsed.IsScalarExpression &&
!parsed.IsWarewolfAtomAtomExpression)
{
return("Can only have a scalar, a RecordSet or a RecordSet with column qualification as input");
}
}
catch (Exception)
{
return("Unable to parse the Source Name");
}
return(null);
}