public List <Question> GetAllQuestions()
{
using (var context = new QuizEntities())
{
return(context.Questions.Include(c => c.Answers).ToList());
}
}
public List <Test> GetAllTests()
{
using (var context = new QuizEntities())
{
return(context.Tests.Include(c => c.Difficulty).ToList());
}
}
public List <UserSession> GetAllUserSessions()
{
using (var context = new QuizEntities())
{
return(context.UserSessions.Include("User").ToList());
}
}
public List <Category> GetAllCategories()
{
using (var context = new QuizEntities())
{
return(context.Categories.ToList());
}
}
public UserSession GetUserSessionById(Guid id)
{
using (var context = new QuizEntities())
{
return(context.UserSessions.Include("User").FirstOrDefault(c => c.Id == id));
}
}
public Test GetTestById(int id)
{
using (var context = new QuizEntities())
{
return(context.Tests.Include(c => c.Difficulty).FirstOrDefault(c => c.Id == id));
}
}
public User GetUserByUsername(string username)
{
using (var context = new QuizEntities())
{
return(context.Users.FirstOrDefault(c => c.Email == username));
}
}
public List <QuestionType> GetAllQuestionTypes()
{
using (var context = new QuizEntities())
{
return(context.QuestionTypes.ToList());
}
}
public List <User> GetAllUsers()
{
using (var context = new QuizEntities())
{
return(context.Users.Include(c => c.UserSessions).Include(c => c.Exams.Select(e => e.Test)).ToList());
}
}
public List <Difficulty> GetDifficultyLevelList()
{
using (var context = new QuizEntities())
{
return(context.Difficulties.ToList());
}
}
public Exam GetExamByUserId(Guid userId)
{
using (var context = new QuizEntities())
{
return(context.Exams.Include(c => c.Test).Include(c => c.User).FirstOrDefault(c => c.UserID == userId));
}
}
public Exam GetExamById(int id)
{
using (var context = new QuizEntities())
{
return(context.Exams.Include(c => c.Test).Include(c => c.User).FirstOrDefault(c => c.Id == id));
}
}
public List <Exam> GetAllExams()
{
using (var context = new QuizEntities())
{
return(context.Exams.Include(c => c.Test).Include(c => c.User).ToList());
}
}
public User GetUserById(Guid id)
{
using (var context = new QuizEntities())
{
return(context.Users.FirstOrDefault(c => c.Id.Equals(id)));
}
}
public void DeleteCategory(int id)
{
using (var context = new QuizEntities())
{
var category = context.Categories.FirstOrDefault(c => c.Id == id);
context.Categories.Remove(category);
context.SaveChanges();
}
}
public void StartTimerById(int id)
{
using (var context = new QuizEntities())
{
var exam = context.Exams.FirstOrDefault(c => c.Id == id);
exam.StartTime = DateTime.Now;
context.SaveChanges();
}
}
public Test GetTestWithQuestionsById(int id)
{
using (var context = new QuizEntities())
{
return(context.Tests.Include(c => c.Questions).
Include(c => c.Questions.Select(q => q.Category)).
Include(c => c.Questions.Select(q => q.Difficulty)).
Include(c => c.Questions.Select(q => q.Answers)).FirstOrDefault(f => f.Id == id));
}
}
public User DeleteUser(Guid id)
{
using (var context = new QuizEntities())
{
var user = context.Users.FirstOrDefault(c => c.Id == id);
var deletedUser = context.Users.Remove(user);
context.SaveChanges();
return(deletedUser);
}
}
public Exam UpdateUserTest(Guid userId, int testId)
{
using (var context = new QuizEntities())
{
var exam = context.Exams.FirstOrDefault(c => c.UserID == userId && String.IsNullOrEmpty(c.Grade));
exam.TestID = testId;
context.SaveChanges();
return(exam);
}
}
public void DeleteDifficultyLevel(int id)
{
using (var context = new QuizEntities())
{
var difficulty = context.Difficulties.FirstOrDefault(c => c.Id == id);
context.Difficulties.Remove(difficulty);
context.SaveChanges();
}
}
public Category AddCategory(string name)
{
using (var context = new QuizEntities())
{
var category = new Category()
{
Name = name
};
var savedCategory = context.Categories.Add(category);
context.SaveChanges();
return(savedCategory);
}
}
public Exam AssignTestToUser(Guid userId, int testId)
{
using (var context = new QuizEntities())
{
var exam = new Exam()
{
UserID = userId,
TestID = testId,
};
var savedExam = context.Exams.Add(exam);
context.SaveChanges();
return(savedExam);
}
}
public TestsWithQuestion AddTestWithQuestion(int testId, int questionId)
{
using (var context = new QuizEntities())
{
var testWithQuestion = new TestsWithQuestion()
{
TestID = testId,
QuestionID = questionId
};
// var rez = context.TestsWithQuestions.Add(testWithQuestion);
context.SaveChanges();
return(new TestsWithQuestion());
}
}
public Difficulty AddDifficultyLevel(string name)
{
using (var context = new QuizEntities())
{
var difficulty = new Difficulty()
{
DifficultyLevel = name
};
var savedDifficulty = context.Difficulties.Add(difficulty);
context.SaveChanges();
return(savedDifficulty);
}
}
public void AddUserSession(Guid userId)
{
using (var context = new QuizEntities())
{
var userSession = new UserSession()
{
Id = Guid.NewGuid(),
UserID = userId,
IsValid = true,
LoggedIn = DateTime.Now
};
context.UserSessions.Add(userSession);
context.SaveChanges();
}
}
public Answer AddAnswer(string text, bool value, int questionId)
{
using (var context = new QuizEntities())
{
var answer = new Answer()
{
AnswerText = text,
IsCorrect = value,
QuestionID = questionId
};
var rez = context.Answers.Add(answer);
context.SaveChanges();
return(rez);
}
}
public User AddUser(Guid id, string email, Guid salt, string password, bool isAdmin)
{
using (var context = new QuizEntities())
{
var user = new User()
{
Id = id,
Email = email,
Salt = salt,
IsAdmin = isAdmin,
Password = password
};
context.Users.Add(user);
context.SaveChanges();
return(user);
}
}
public UserSession SetSessionInvalid(Guid authorization)
{
using (var context = new QuizEntities())
{
var userSession = context.UserSessions.FirstOrDefault(c => c.Id == authorization && c.IsValid);
if (userSession == null)
{
return(null);
}
userSession.LoggedOut = DateTime.Now;
userSession.IsValid = false;
context.SaveChanges();
return(userSession);
}
}
public Test AddTest(string name, int difficultyId, TimeSpan?duration)
{
using (var context = new QuizEntities())
{
var test = new Test()
{
Name = name,
DifficultyID = difficultyId,
Duration = duration
};
var rez = context.Tests.Add(test);
context.SaveChanges();
return(rez);
}
}
public Question AddQueston(string text, int difficultyId, int categoryId, int typeId)
{
using (var context = new QuizEntities())
{
var question = new Question()
{
QuestionText = text,
DifficultyId = difficultyId,
CategoryId = categoryId,
TypeId = typeId
};
var rez = context.Questions.Add(question);
context.SaveChanges();
return(rez);
}
}
