Automatic.URLFollow.GetResponse C# (CSharp) Method

        public override List<IRCResponse> GetResponse(BotMessage message)
        {
            if (message.Type != "PRIVMSG"
                || message.TargetType != IRCMessage.TargetTypes.CHANNEL
                || ChannelList.ChannelHasMode(message.ReplyTo, 'U'))
                return null;

            Match match = Regex.Match(message.MessageString, @"https?://[^\s]+", RegexOptions.IgnoreCase);
            if (!match.Success)
                return null;

            if (Regex.IsMatch(match.Value, @"\.(jpe?g|gif|png|bmp)$"))
                return null;

            string response = null;

            Match youtubeMatch = Regex.Match(match.Value, @"www\.youtube\.com/watch\?v=([^&]+)");
            if (youtubeMatch.Success)
                response = FollowYouTube(youtubeMatch.Groups[1].Value);
            else
                response = FollowStandard(match.Value);

            if (response == null)
                return null;

            return new List<IRCResponse>() { new IRCResponse(ResponseType.Say, response, message.ReplyTo) };
        }