public override async Task <IHandlerResult <StartViewModel> > Handle(
StartCommand request,
CancellationToken cancellationToken)
{
_logger.Information("StartCommand invoked.");
if (request.IsBot)
{
_logger.Fatal("Bot attempted to subscribe!");
return(ValidationFailed("Sorry, no bots here!"));
}
if (request.ChatId <= 0)
{
_logger.Warning($"Bad parameter: {nameof(ChatId)}!");
return(ValidationFailed($"Bad parameter: {nameof(ChatId)}!"));
}
var dbUser = await _userRepository.GetFirstAsync(u => u.ChatId == request.ChatId);
if (!(dbUser is null))
{
var message = dbUser.IsSubscribed
? "were"
: "were not";
return(ValidationFailed(
$"You already registered to the bot previously and {message} subscribed to updates."));
}
var newUser = _mapper.Map <User>(request);
newUser.IsSubscribed = true;
newUser.RegisteredAt = DateTime.Now;
await _userRepository.CreateAsync(newUser);
var tours = await _toursFetcher.FetchToursAsync(true, 10);
foreach (var tour in tours)
{
if (tour.ImgUrl != null)
{
var uri = new Uri(tour.ImgUrl);
await _telegram.SendPhotoAsync(request.ChatId, new InputOnlineFile(uri), cancellationToken : cancellationToken);
}
if (tour.Text != null)
{
await _telegram.SendTextMessageAsync(request.ChatId, tour.Text, cancellationToken : cancellationToken);
}
}
return(Ok());
}
private async void DoWork(object state)
{
try
{
var tours = await _toursFetcherService.FetchToursAsync(false, 10);
var command = new NotifyUpdatesCommand {
Tours = tours
};
await _mediator.Send(command);
}
catch (Exception e)
{
_logger.Error(e, $"{nameof(ToursNotifierHostedService)} failed.");
}
}