internal static HostsEntryDto ToDto(IEnumerable <HostsEntry> hostsEntries)
{
HostsEntry[] hostsEntryArray = hostsEntries.ToArray();
// ensure that the hosts entries are all for the same host name
if (hostsEntryArray.Select(he => he.Host).Distinct(StringComparer.OrdinalIgnoreCase).Count() != 1)
{
throw new ArgumentException("expected one unique host name", nameof(hostsEntries));
}
var result = new HostsEntryDto
{
Host = hostsEntryArray[0].Host,
IpAddresses = hostsEntryArray.Select(he => he.IpAddress.ToString()).ToArray()
};
return(result);
}
internal static HostsEntry[] ToModels(HostsEntryDto dto)
{
if (dto.Host == null)
{
throw new ArgumentException($"{nameof(dto.Host)} cannot be null", nameof(dto));
}
if (dto.IpAddresses == null)
{
throw new ArgumentException($"{nameof(dto.IpAddresses)} cannot be null", nameof(dto));
}
if (dto.IpAddresses.Any(ip => ip == null))
{
throw new ArgumentException($"{nameof(dto.IpAddresses)} cannot contain a null value", nameof(dto));
}
HostsEntry[] models = dto.IpAddresses
.Select(ip => new HostsEntry(dto.Host, ip))
.ToArray();
return(models);
}