public Attempt AddAttemption(User user, Problem problem)
{
var t = new Attempt(user, problem);
user.Attempts.Add(t);
AppContext.Update(user);
AppContext.Update(t);
// AppContext.SaveChanges();
return(t);
}
public bool TryAddStudent(string name, string lastName, DateTime birthday, int course, string login,
string passwordHash)
{
if (AppContext.Students.Any(u => u.Login == login))
{
return(false);
}
Student student = new Student(name, lastName, birthday, course, login, passwordHash);
AppContext.Students.Add(student);
AppContext.SaveChangesAsync();
return(true);
}
public bool RemoveUser(User user)
{
if (user == null)
{
return(false);
}
if (user.Role == Role.Student)
{
AppContext.Students.Remove(user as Student);
}
else if (user.Role == Role.Teacher)
{
AppContext.Teachers.Remove(user as Teacher);
}
AppContext.SaveChanges();
return(true);
}
public void AddProblem(Teacher teacher, Problem problem)
{
teacher.MyProblems.Add(problem);
AppContext.Update(teacher);
}
public void AddTeacher(string name, string lastName, DateTime birthday, string login, string passwordHash)
{
AppContext.Teachers.Add(new Teacher(name, lastName, birthday, login, passwordHash));
AppContext.SaveChanges();
}
public Model()
{
AppContext = new AppContext();
}