public static List <string> GetReplacedPicturesList(PollBase <TQuestion> oldPollBase, PollBase <TQuestion> newPollBase)
{
var replacedPictures = new List <string>();
foreach (var oldQuestion in oldPollBase.Questions)
{
var newQuestion = newPollBase.Questions.SingleOrDefault(question => question.Id == oldQuestion.Id);
if (newQuestion == null)
{
continue;
}
if (newQuestion.PictureId != oldQuestion.PictureId)
{
replacedPictures.Add(oldQuestion.PictureId);
}
replacedPictures.AddRange(oldQuestion.AnswerOptions.Select(oldOption => oldOption.PictureId).Where(oldOption =>
!newQuestion.AnswerOptions.Select(newOption => newOption.PictureId).Contains(oldOption)));
}
return(replacedPictures);
}
public bool CheckCompleted <TQuestion>(PollBase <TQuestion> pollBase) where TQuestion : Question
{
return(pollBase.Questions.Select(question => question.Id).All(id => Answers.Select(answer => answer.QuestionId).Contains(id)));
}