private static ITry <TaxSummary, IEnumerable <string> > GetV4TaxSummary(Dto.Archive archive)
{
var invoiceFooter = archive.InvoiceFooter.ToTry(_ => "Invoice footer file not found.".ToEnumerable());
return(invoiceFooter.FlatMap(f =>
{
var taxBreakdownNet = Try.Aggregate(f.Rows.Select(row => ParseLineTaxSummary(row.Values[1])));
var taxBreakdownTax = Try.Aggregate(f.Rows.Select(row => ParseLineTaxSummary(row.Values[2])));
return Try.Aggregate(
taxBreakdownNet,
taxBreakdownTax,
(net, tax) => TaxSummary.Sum(net.Concat(tax))
);
}));
}
