public Question GetNextQuestion(int questionId, int answerId, int sessionId)
{
var hasInteractions = _myRepository.ValidateUserAndCheckAnyInteractions(sessionId);
if (!hasInteractions)
{
var isFirstQuestionOfQuestionnaire = _myRepository.CheckFirstQuestionOfQuestionnaire(questionId, answerId);
if (!isFirstQuestionOfQuestionnaire)
{
throw new Exception("Answer is not to the first question.");
}
}
else
{
var isCorrectSequenceOfQuestions = _myRepository.CheckIsCorrectSequenceOfQuestions(questionId, answerId, sessionId);
if (!isCorrectSequenceOfQuestions)
{
throw new Exception("Wrong sequence of questions.");
}
}
_myRepository.SubmitAnswer(questionId, answerId, sessionId);
var nextQuestion = _myRepository.GetNextQuestion(answerId);
return(nextQuestion);
}