public DnsMiddleware(IMiddleware next, DnsPlugin dnsPlugin, ILog log)
: base(next)
{
this.dnsPlugin = dnsPlugin;
this.log = log;
this.HandlerMappings = new[]
{
new HandlerMapping
{
ValidHandles = StartsWithHandle.For($"{Configuration.CommandPrefix} {Lookup}"),
EvaluatorFunc = this.DnsLookupHandler,
Description = $"Gets IP address for dns entry. {GetHelpText(Lookup)}",
VisibleInHelp = true
},
};
}
private IEnumerable <ResponseMessage> DnsLookupHandler(IncomingMessage incomingMessage, IValidHandle matchedHandle)
{
yield return(incomingMessage.IndicateTypingOnChannel());
if (!DnsLookupCommandWellFormatted(incomingMessage.TargetedText))
{
yield return(incomingMessage.ReplyToChannel($"Command was not formatted correctly. Help: {GetHelpText(Lookup)}"));
yield break;
}
var hostToLookup = DnsPlugin.GetHostFromMessage(incomingMessage.TargetedText);
var ipAddresses = DnsPlugin.LookUpIpFromCommandText(hostToLookup);
if (ipAddresses == null)
{
yield return(incomingMessage.ReplyToChannel($"Error looking up requested host '{hostToLookup}'. No result were returned."));
yield break;
}
yield return(incomingMessage.ReplyToChannel($"dns lookup for '{hostToLookup}' returned: {DnsPlugin.GetIpAddressesAsText(ipAddresses)}"));
}