telegram-bot/modules/ChatManagement/Handler/Rules.cs

using System.Threading.Tasks;
using BotFramework.Attributes;
using BotFramework.Enums;
using Kruzya.TelegramBot.Core.Data;
using Kruzya.TelegramBot.Core.Extensions;
using Kruzya.TelegramBot.Core.Handler;
using Telegram.Bot;
using Telegram.Bot.Exceptions;
using West.TelegramBot.ChatManagement.Service;

namespace West.TelegramBot.ChatManagement.Handler;

class Rules : CommonHandler
{
    private readonly RulesService _rulesService;

    [InChat(InChat.Public)]
    [Command("setrules", CommandParseMode.Both)]
    public async Task HandleSetRules()
    {
        var replyToMessage = Message?.ReplyToMessage;

        if (replyToMessage == null || !await Bot.IsUserAdminAsync(Chat, From))
        {
            return;
        }

        await _rulesService.SetRulesAsync(Chat, replyToMessage.MessageId);
    }

    [InChat(InChat.Public)]
    [Command("rules", CommandParseMode.Both)]
    public async Task HandleRules()
    {
        if (!await _rulesService.HasRulesAsync(Chat))
        {
            return;
        }

        try
        {
            await Bot.CopyMessage(Chat.Id, Chat.Id, await _rulesService.GetRulesMessageIdAsync(Chat) ?? 0);
        }
        catch (ApiRequestException)
        {
            await _rulesService.RemoveChatRulesAsync(Chat);
            throw;
        }
    }
        
    public Rules(CoreContext db, RulesService rulesService) : base(db)
    {
        _rulesService = rulesService;
    }
}