sera-slackbot/Bot/Commands/UnhelpfulBotCommand.cs

using System.Text.Json;
using Microsoft.AspNetCore.Http;

using SlackAPI;

using sera_slackbot.Library;

namespace sera_slackbot.Commands
{
    public class UnhelpfulBotCommand : IBotCommand
    {
        private string channelId;
        private string userId;
        private string message;
        public UnhelpfulBotCommand()
        {
        }

        public void ExtractValidData(JsonElement slackEvent)
        {
            this.channelId = slackEvent.GetProperty("channel").ToString();
            this.userId = slackEvent.GetProperty("user").ToString();
        }

        public bool WillTrigger(JsonElement slackEvent)
        {
            return true;
        }

        public dynamic Run(SlackClient client)
        {
            message = $"I'm sorry, \u003C@{userId}\u003E, I don't understand.";
            client.PostMessage(response => { }, channelId, message);
            return new
            {
                code = StatusCodes.Status200OK,
                body = ""
            };
        }
    }
}