private async Task <string> HandleMessageAsync(Message message)
{
if (message.Text.StartsWith("/subscribe"))
{
await SubscriptionDB.CreateAsync(new TelegramSubscription { ChatId = message.Chat.Id }).ConfigureAwait(false);
return("Welcome! You subscribed to the notifications.");
}
if (message.Text.StartsWith("/ping"))
{
return("Pong!");
}
if (message.Text.StartsWith("/last"))
{
var lastMessage = await NotificationsDB.LoadLatestAsync().ConfigureAwait(false);
if (lastMessage == null)
{
return("No messages yet.");
}
var lastMessageTime = lastMessage.Timestamp + (message.Date - DateTime.UtcNow);
var formattedStatus = FormatBookingStatus(lastMessage.Status);
return($"Latest message was at {lastMessageTime:T}\n{formattedStatus}");
}
return(@"Usage:
/subscribe - subscribe to notifications
");
}
private void PopulateCBSub()
{
List <Subscription> subs = new List <Subscription>();
subs = SubscriptionDB.GetSubscriptions();
cbSubscription.DisplayMember = "Name";
cbSubscription.ValueMember = "ID";
cbSubscription.DataSource = subs;
}
private async Task NotifySubscribersAsync(BookingStatus bookingStatus)
{
var errors = new List <Exception>();
var subscriptions = await SubscriptionDB.LoadAllAsync().ConfigureAwait(false);
foreach (var subscription in subscriptions)
{
try
{
await Bot.SendTextMessageAsync(subscription.ChatId, FormatBookingStatus(bookingStatus), ParseMode.Markdown).ConfigureAwait(false);
}
catch (Exception e)
{
errors.Add(e);
}
}
if (errors.Any())
{
throw new AggregateException(errors);
}
}
