telegram-client/src/Nocr.TelegramClient.AppServices/Handlers/Messages/StartMessage/StartMessageHandler.cs

using Insight.Localizer;
using Insight.TelegramBot;
using Insight.TelegramBot.Handling.Handlers;
using Insight.TelegramBot.Models;
using Nocr.TelegramClient.AppServices.Bots.MessageDispatcher;
using Telegram.Bot.Types;
using Telegram.Bot.Types.Enums;

namespace Nocr.TelegramClient.AppServices.Handlers.Messages.StartMessage;

public class StartMessageHandler : IMatchingUpdateHandler<StartMessageMatcher>
{
    private readonly ILocalizer _localizer;
    private readonly IMessageDispatcherQueue _messageQueue;

    public StartMessageHandler(ILocalizer localizer, IMessageDispatcherQueue messageQueue)
    {
        _localizer = localizer ?? throw new ArgumentNullException(nameof(localizer));
        _messageQueue = messageQueue ?? throw new ArgumentNullException(nameof(messageQueue));
    }

    public Task Handle(Update update, CancellationToken cancellationToken = default)
    {
        var telegramId = update.Message.From.Id;
        var message = new TextMessage(telegramId)
        {
            Text = _localizer.Get("messages", "StartMessage"),
            ParseMode = ParseMode.Html
        };

        _messageQueue.Enqueue(message);
        return Task.CompletedTask;
    }
}