namespace OpenArchival.DataAccess; public class ModelHelpers { public static string? MakeIdentifier(List? values, string fieldSeperator, string? archiveEntryNumber) { if (values is null || values.Count == 0) return null; return (archiveEntryNumber is not null) ? $"{string.Join(fieldSeperator, values)}{archiveEntryNumber}" : string.Join(fieldSeperator, values); } }