HandleUpdateAsync method within ChatBot.cs

ChatBot.cs

private async Task HandleUpdateAsync(ITelegramBotClient botClient, Update update, CancellationToken cancellationToken)
{
    if (update.Message is not { } message)
        return;
    if (message.Text is not { } messageText)
        return;
    DateTime targetDate = update.Message.Date;
    TimeSpan timeDiff = DateTime.UtcNow - targetDate;

    //no stale messages
    if (Math.Abs(timeDiff.TotalSeconds) >= 30)
        return;

    ChatGPT chatGPT = new ChatGPT();
    GPTResponse gptResponse = new GPTResponse();
    if (((message.Text.Contains("@"+ botName)) ||
        (message.ReplyToMessage != null && message.ReplyToMessage.From.Username == botName)) &&
        botClient.BotId == client.BotId)
    {
        string query = messageText.Replace("@"+ botName, "");

        gptResponse = await chatGPT.GenerateResponse($"{personality}. Reply to the following message: {query}");
        var chatId = message.Chat.Id;
        Telegram.Bot.Types.Message sentMessage = await botClient.SendTextMessageAsync(
        chatId: chatId,
        gptResponse.response,
        cancellationToken: cancellationToken,
        replyToMessageId: message.MessageId);        
    }
}