private async void OnCallBack(object sender, CallbackQueryEventArgs e)
{
string[] data = e.CallbackQuery.Data.Split(':');
int userRole;
if (int.TryParse(data[2], out userRole) && userRole == 0)
{
_imageHolder.Images = null;
var presentationEntity = await _presentationRepository.GetByName(data[1]);
using (Stream stream = new MemoryStream(presentationEntity.File))
{
IPresentation presentation = Syncfusion.Presentation.Presentation.Open(stream);
foreach (var i in presentation.Slides)
{
_imageHolder.Images.Add(((MemoryStream)i.ConvertToImage(ExportImageFormat.Png)).ToArray());
}
_imageHolder.Current = 1;
_imageHolder.Guid = new Guid();
}
InlineKeyboardButton button = new InlineKeyboardButton();
button.CallbackData = $"{data[1]}:1:{1}";
button.Text = "\\|/";
InlineKeyboardMarkup markup = new InlineKeyboardMarkup(button);
await _client.SendTextMessageAsync(data[1], "Next page", replyMarkup : markup);
}
else if (int.TryParse(data[1], out userRole) && userRole == 1)
{
_imageHolder.Current++;
int i = _imageHolder.Current;
InlineKeyboardButton button = new InlineKeyboardButton();
button.CallbackData = $"{data[1]}:{i}:{1}";
button.Text = "\\|/";
InlineKeyboardMarkup markup = new InlineKeyboardMarkup(button);
await _client.EditMessageReplyMarkupAsync(data[1], markup);
}
//else if (int.TryParse(data[1], out userRole) && userRole == 2)
//{
//}
}