public DNSRecordCollection WhereUpdated(DNSRecordCollection compareTo)
{
DNSRecordCollection newRecords = this.WhereNew(compareTo);
DNSRecordCollection updatedRecords = this.IntersectWith(compareTo, DNSRecordEqualityComparer.Instance);
DNSRecordCollection updatedRecordsWithoutNewRecords = new DNSRecordCollection(updatedRecords.Except(newRecords, DNSRecordNameTypeEqualityComparer.Instance));
return(Clone(updatedRecordsWithoutNewRecords));
}
private DNSRecordCollection ApplyToRecord(Action <DNSRecord> action)
{
DNSRecordCollection clone = Clone(this);
foreach (DNSRecord dnsRecord in clone)
{
action(dnsRecord);
}
return(clone);
}
private static string?FindId(DNSRecord record, DNSRecordCollection dnsRecords)
{
return(dnsRecords.FirstOrDefault(r => r.Type == record.Type && r.Name == record.Name)?.Id);
}
private static DNSRecordCollection Clone(DNSRecordCollection from)
{
return(new DNSRecordCollection(from.Select(Map)));
}
public DNSRecordCollection WithUpdatedIdsFrom(DNSRecordCollection dnsRecords)
{
return(ApplyToRecord(d => d.Id = FindId(d, dnsRecords)));
}
private DNSRecordCollection IntersectWith(DNSRecordCollection compareTo, IEqualityComparer <DNSRecord> equalityComparer)
{
DNSRecordCollection records = new DNSRecordCollection(compareTo.Where(r => !this.Contains(r, equalityComparer)));
return(records.Any() ? records : Empty());
}
public DNSRecordCollection WhereNew(DNSRecordCollection compareTo)
{
DNSRecordCollection newRecords = this.IntersectWith(compareTo, DNSRecordNameTypeEqualityComparer.Instance);
return(Clone(newRecords));
}
