/// <summary>
/// Detect the language of the message and then translates
/// it if there is a rule for the language
/// </summary>
/// <param name="message">The text to be translated.</param>
/// <returns>The translated text or <c>null</c> if either the translation
/// failed or the text was empty or there was no translation rule for this language.</returns>
async Task TranslateText(string message, IMessageProcessedCallback callback)
{
try
{
string sourceLang = await yandexTranslationService.DetectLanguage(message,
new List <string>(translationRules.Keys));
string targetLang = translationRules.GetValueOrDefault(sourceLang, null);
string translation = await yandexTranslationService.
TranslateText(message, sourceLang, targetLang);
await callback.OnAnswerMessageGenerated(translation);
} catch (Exception e)
{
Console.WriteLine("Exception when trying to translate. message: " +
message + " Exception: " + e);
await callback.OnAnswerMessageGenerated(TRANSLATION_FAILED_MESSAGE);
}
}
public async Task OnMessageReceived(Message m, IMessageProcessedCallback callback)
{
if (m.Type == MessageType.Text && !string.IsNullOrWhiteSpace(m.Text))
{
Command command = Command.TryParse(m.Text);
if (command != null)
{
await callback.OnAnswerMessageGenerated(await ReactToCommand(command));
}
else if (active)
{
//message is a text to be translated:
await TranslateText(m.Text.Trim(), callback);
}
else if (firstMessage)
{
await callback.OnAnswerMessageGenerated(FIRST_MESSAGE);
}
firstMessage = false;
}
}