private async Task CheckPriceAsync(Advert advert, ApplicationContext context)
{
var grabber = _grabbers.First(x => advert.Url.Contains(x.Url));
var freshAdvert = await grabber.ParseAdvert(advert.Url);
if (freshAdvert.LowPrice != default && freshAdvert.LowPrice != advert.LowPrice)
{
await NotifyUserOfPriceCut(advert, freshAdvert, DateTime.Now);
advert.LowPrice = freshAdvert.LowPrice;
advert.LastCheckDate = DateTime.Now;
context.Attach(advert);
context.Entry(advert).State = EntityState.Modified;
var priceHistory = new AdvertPriceHistory
{
AdvertId = advert.Id,
Price = advert.LowPrice,
ChangeDate = advert.LastCheckDate
};
await context.AdvertPriceHistories.AddAsync(priceHistory);
await context.SaveChangesAsync();
}
}
public override async Task ExecuteAsync(Message msg)
{
var url = msg.Text.Trim();
if (await _context.Adverts.AnyAsync(x => x.UserId == _chatService.Chats[msg.Chat.Id].Id && x.Url == url))
{
await _client.SendTextMessageAsync(msg.Chat.Id, "У вас уже есть данное объявление", replyMarkup : GetDefaultReplyButtons());
}
else
{
var grabber = _grabbers.FirstOrDefault(x => url.Contains(x.Url))
?? throw new TelegramException("Пожалуйста, введите коректную ссылку", msg.Chat.Id);
var advert = await grabber.ParseAdvert(msg.Text);
advert.UserId = _chatService.Chats[msg.Chat.Id].Id;
advert.IsActual = true;
advert.Complete = false;
advert.CreateDate = DateTime.Now;
advert.LastCheckDate = DateTime.Now;
await _context.Adverts.AddAsync(advert);
await _context.SaveChangesAsync();
var priceHistory = new AdvertPriceHistory
{
AdvertId = advert.Id,
Price = advert.LowPrice,
ChangeDate = advert.LastCheckDate
};
await _context.AdvertPriceHistories.AddAsync(priceHistory);
await _context.SaveChangesAsync();
var message = $"Название: {advert.Name}\nМинимальная цена: {advert.LowPrice}\nДобавлено: {advert.CreateDate}";
await _client.SendTextMessageAsync(msg.Chat.Id, message, replyMarkup : GetDefaultReplyButtons());
}
}
