telegram-client/src/Nocr.TelegramClient.AppServices/Handlers/Messages/SubscriptionsMessage/SubscriptionsMessageHandler.cs

using Insight.Localizer;
using Insight.TelegramBot;
using Insight.TelegramBot.Handling.Handlers;
using Microsoft.Extensions.Logging;
using Nocr.TelegramClient.AppServices.Bots.MessageDispatcher;
using Nocr.TelegramClient.AppServices.Handlers.BaseHandlers;
using Nocr.TelegramClient.AppServices.Users;
using Nocr.TextMatcher.Api.Contracts.TextMatches;
using Telegram.Bot.Types;

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

public class SubscriptionsMessageHandler : ViewSubscriptionHandlerBase,
    IMatchingUpdateHandler<SubscriptionsMessageMatcher>
{
    private readonly IUsersService _usersService;

    public SubscriptionsMessageHandler(
        ILogger<SubscriptionsMessageHandler> logger,
        ILocalizer localizer,
        IMessageDispatcherQueue messageQueue,
        IUsersService usersService,
        IBot bot,
        ITextSubscriptionsController subscriptionsController)
        : base(logger, localizer, messageQueue, bot, subscriptionsController)
    {
        _usersService = usersService ?? throw new ArgumentNullException(nameof(usersService));
    }

    public async Task Handle(Update update, CancellationToken cancellationToken = default)
    {
        var telegramId = update.Message.From.Id;
        var user = await _usersService.GetOrCreate(telegramId, update.Message.From.Username, cancellationToken);

        var subscriptions = await SubscriptionsController.GetByUserId(user.Id, cancellationToken);
        var subscription = subscriptions.MinBy(x => x.Id);

        await SendSubscriptionMessage(telegramId, subscription, CancellationToken.None);
    }
}