public async Task SubscribeToNewsletter()
{
if (!await CheckIfAdminInGroups())
{
return;
}
if (MessageCommand.Parameters.Count != 1)
{
await ReplyTextMessageAsync("Usage:\n/subscribe <newsletter>");
}
var newsletterKey = MessageCommand.Parameters[0];
var newsletters = await _newsletterService.GetNewslettersAsync();
if (newsletters.Any(n => n.Key == newsletterKey))
{
var result = await _newsletterService.SubscribeChatAsync(newsletterKey, TelegramChat !.Id);
if (result)
{
await ReplyTextMessageAsync(
$"Successfully subscribed to the {newsletterKey} newsletter");
}
else
{
await ReplyTextMessageAsync(
"Can't subscribe to newsletter, probably you are already subscribed");
}
}
else
{
await ReplyTextMessageAsync(
$"The newsletter {newsletterKey} doesn't exist.");
}
}
