public async Task CreateQuiz(apiModels.Quiz quiz)
{
if (quiz == null)
{
throw new ArgumentNullException(nameof(quiz));
}
var title = quiz.Title.TrimToNull();
if (title == null)
{
throw new InvalidOperationException("Quiz With Empty Title cannot be created!");
}
var dbQuiz = new Quiz {
Title = title
};
_dbContext.Quiz.Add(dbQuiz);
if (quiz.Questions?.Any() == true)
{
await _dbContext.SaveChangesAsync(); // we need quiz Id
foreach (var question in quiz.Questions)
{
await CreateQuestion(dbQuiz.Id, question);
}
}
await _dbContext.SaveChangesAsync();
}
public async Task UpdateQuizById(apiModels.Quiz quiz)
{
if (quiz == null)
{
throw new ArgumentNullException(nameof(quiz));
}
var title = quiz.Title.TrimToNull();
if (title == null)
{
throw new InvalidOperationException("Quiz With Empty Title cannot be updated!");
}
var dbQuiz = await _dbContext.Quiz.FirstOrDefaultAsync(q => q.Id == quiz.Id) ?? throw new InvalidOperationException("Wrong Quiz Id Provided.");
dbQuiz.Title = title;
await _dbContext.SaveChangesAsync();
}