public IOption<string> GenerateHint(QueryResultTable correct, QueryResultTable submitted)
{
if (correct.Equals(submitted))
{
return Option.None<string>();
}
var correctColumns = Columns(correct);
var submittedColumns = Columns(submitted);
if (correctColumns.Count == submittedColumns.Count &&
ContainsAllColumns(correctColumns, submittedColumns) &&
ContainsAllColumns(submittedColumns, correctColumns)
)
{
return Option.Some(WrongColumnOrder);
}
if (correctColumns.Count < submittedColumns.Count &&
ContainsAllColumns(submittedColumns, correctColumns)
)
{
return Option.Some(TooManyColumns);
}
return Option.None<string>();
}
