public void SavePIN(string username, string PIN)
{
using (VCDataModelContainer data = new VCDataModelContainer())
{
int count = (from x in data.Students
where x.Username.Equals(username)
select x).Count();
if (count != 0)
{
data.Students.First(x => x.Username.Equals(username)).PasswordResetPIN = PIN;
data.SaveChanges();
}
else
{
count = (from x in data.Teachers
where x.Username.Equals(username)
select x).Count();
if (count != 0)
{
data.Teachers.First(x => x.Username.Equals(username)).PasswordResetPIN = PIN;
data.SaveChanges();
}
}
}
}
public void AddUserDetails(string username, string Phone, string Website, bool EmailConfirmed)
{
using (VCDataModelContainer data = new VCDataModelContainer())
{
int count = (from x in data.Students
where x.Username.Equals(username)
select x).Count();
if (count != 0)
{
Student s = data.Students.First(x => x.Username.Equals(username));
s.Mobile = Phone;
s.Website = Website;
s.EmailConfirmed = EmailConfirmed;
data.SaveChanges();
return;
}
count = (from x in data.Teachers
where x.Username.Equals(username)
select x).Count();
if (count != 0)
{
Teacher t = data.Teachers.First(x => x.Username.Equals(username));
t.Mobile = Phone;
t.Website = Website;
t.EmailConfirmed = EmailConfirmed;
data.SaveChanges();
}
}
}
public string GetUserEmailConfirmationPIN(string username)
{
using (VCDataModelContainer data = new VCDataModelContainer())
{
int count = (from x in data.Students
where x.Username.Equals(username)
select x).Count();
if (count != 0)
{
return(data.Students.First(x => x.Username.Equals(username)).EmailConfirmationPIN);
}
else
{
count = (from x in data.Teachers
where x.Username.Equals(username)
select x).Count();
if (count != 0)
{
return(data.Teachers.First(x => x.Username.Equals(username)).EmailConfirmationPIN);
}
else
{
return(null);
}
}
}
}
public Announcement GetAnnouncement(int id)
{
VCDataModelContainer data = new VCDataModelContainer();
Announcement a = data.Announcements.Find(id);
return(a);
}
public Assignment GetAssignment(int id)
{
VCDataModelContainer data = new VCDataModelContainer();
Assignment a = data.Assignments.Find(id);
return(a);
}
public Quiz GetQuiz(int id)
{
VCDataModelContainer data = new VCDataModelContainer();
Quiz q = data.Quizs.Find(id);
return(q);
}
public void AddTeacher(Teacher teacher)
{
using (VCDataModelContainer data = new VCDataModelContainer())
{
data.Teachers.Add(teacher);
data.SaveChanges();
}
}
public void ChangePassword(int sId, string Password)
{
using (VCDataModelContainer data = new VCDataModelContainer())
{
Student s = data.Students.Find(sId);
s.Password = Password;
data.SaveChanges();
}
}
public void SaveDiscussion(int cid, Discussion discussion)
{
using (VCDataModelContainer data = new VCDataModelContainer())
{
Course c = data.Courses.Find(cid);
c.Discussions.Add(discussion);
data.SaveChanges();
}
}
public void AddComment(int did, DiscussionComment comment)
{
using (VCDataModelContainer data = new VCDataModelContainer())
{
Discussion d = data.Discussions.Find(did);
d.Comments.Add(comment);
data.SaveChanges();
}
}
public void MakeAnnouncement(int cid, Announcement announcement)
{
using (VCDataModelContainer data = new VCDataModelContainer())
{
Course c = data.Courses.Find(cid);
c.Announcements.Add(announcement);
data.SaveChanges();
}
}
public void ChangePassword(int tId, string Password)
{
using (VCDataModelContainer data = new VCDataModelContainer())
{
Teacher t = data.Teachers.Find(tId);
t.Password = Password;
data.SaveChanges();
}
}
public bool DoesStudentEmailExist(string Email)
{
using (VCDataModelContainer data = new VCDataModelContainer())
{
int count = (from x in data.Students
where x.Email.Equals(Email)
select x).Count();
return(count != 0);
}
}
public bool IsTeacherEmail(string Email)
{
using (VCDataModelContainer data = new VCDataModelContainer())
{
int count = (from x in data.Teachers
where x.Email.Equals(Email)
select x).Count();
return(count != 0);
}
}
public bool DoesSolutionExist(int quizId, int studentId)
{
using (VCDataModelContainer data = new VCDataModelContainer())
{
int count = (from x in data.QuizSolutions
where x.StudentId == studentId && x.QuizId == quizId
select x).Count();
return(count != 0);
}
}
public void AddStudentByEmail(string Email)
{
using (VCDataModelContainer data = new VCDataModelContainer())
{
Student s = new Student {
Email = Email, EmailConfirmed = false
};
data.Students.Add(s);
data.SaveChanges();
}
}
public void AddCourse(string username, string title)
{
using (VCDataModelContainer data = new VCDataModelContainer())
{
Course c = new Course();
c.Title = title;
c.Active = true;
data.Teachers.First(x => x.Username.Equals(username)).Courses.Add(c);
data.SaveChanges();
}
}
public void SetActive(int id, bool active)
{
using (VCDataModelContainer data = new VCDataModelContainer())
{
Course c = data.Courses.Find(id);
if (c != null)
{
c.Active = active;
data.SaveChanges();
}
}
}
public Teacher GetInstructor(int cid)
{
using (VCDataModelContainer data = new VCDataModelContainer())
{
Course c = data.Courses.Find(cid);
if (c == null)
{
return(null);
}
return(c.Teacher);
}
}
public string GetEmailConfirmationPIN(string Email)
{
using (VCDataModelContainer data = new VCDataModelContainer())
{
int count = (from x in data.Students
where x.Email.Equals(Email)
select x).Count();
if (count != 0)
{
return(data.Students.First(x => x.Email.Equals(Email)).EmailConfirmationPIN);
}
return(null);
}
}
public void AddAssignment(Course course, Assignment assignment, List <AssignmentQuestion> questions)
{
using (VCDataModelContainer data = new VCDataModelContainer())
{
Course c = data.Courses.Find(course.Id);
c.Assignments.Add(assignment);
data.SaveChanges();
foreach (AssignmentQuestion q in questions)
{
assignment.Questions.Add(q);
}
data.SaveChanges();
}
}
public void AddQiuz(Course course, Quiz quiz, List <QuizQuestion> questions)
{
using (VCDataModelContainer data = new VCDataModelContainer())
{
Course c = data.Courses.Find(course.Id);
c.Quizzes.Add(quiz);
data.SaveChanges();
foreach (QuizQuestion q in questions)
{
quiz.Questions.Add(q);
}
data.SaveChanges();
}
}
public bool DoesStudentEmailConfirmed(string Email)
{
using (VCDataModelContainer data = new VCDataModelContainer())
{
int count = (from x in data.Students
where x.Email.Equals(Email)
select x).Count();
if (count != 0)
{
return(data.Students.First(x => x.Email.Equals(Email)).EmailConfirmed);
}
return(false);
}
}
public void SaveEmailConfirmationPIN(string Email, string PIN)
{
using (VCDataModelContainer data = new VCDataModelContainer())
{
int count = (from x in data.Students
where x.Email.Equals(Email)
select x).Count();
if (count != 0)
{
data.Students.First(x => x.Email.Equals(Email)).EmailConfirmationPIN = PIN;
data.SaveChanges();
}
}
}
public int CheckLoginDetails(LoginDetails log)
{
using (VCDataModelContainer data = new VCDataModelContainer())
{
Teacher t = null;
try
{
t = data.Teachers.First(x => x.Username.Equals(log.Username));
}
catch (InvalidOperationException) { }
if (t != null)
{
if (t.Password.Equals(log.Password))
{
return(1);
}
else
{
return(0);
}
}
else
{
Student s = null;
try
{
s = data.Students.First(x => x.Username.Equals(log.Username));
}
catch (InvalidOperationException) { }
if (s != null)
{
if (s.Password.Equals(log.Password))
{
return(2);
}
else
{
return(0);
}
}
else
{
return(0);
}
}
}
}
public void EnrollStudent(string Email, int cid)
{
using (VCDataModelContainer data = new VCDataModelContainer())
{
Course c = data.Courses.Find(cid);
int count = (from x in c.Students
where x.Email.Equals(Email)
select x).Count();
if (count == 0)
{
c.Students.Add(data.Students.First(x => x.Email.Equals(Email)));
data.SaveChanges();
}
}
}
public bool DoesStudentEnrolledInCourse(string username, int cid)
{
using (VCDataModelContainer data = new VCDataModelContainer())
{
Course c = data.Courses.Find(cid);
if (c == null)
{
return(false);
}
int count = (from x in c.Students
where x.Username != null && x.Username.Equals(username)
select x).Count();
return(count != 0);
}
}
public QuizSolution GetQuizSolution(int qId, int sId)
{
VCDataModelContainer data = new VCDataModelContainer();
int count = (from x in data.QuizSolutions
where x.StudentId == sId && x.QuizId == qId
select x).Count();
if (count != 0)
{
QuizSolution qs = (from x in data.QuizSolutions
where x.StudentId == sId && x.QuizId == qId
select x).First();
return(qs);
}
return(null);
}
public bool DoesUsernameExist(string username)
{
using (VCDataModelContainer data = new VCDataModelContainer())
{
int count = (from x in data.Students
where x.Username.Equals(username)
select x).Count();
if (count != 0)
{
return(true);
}
count = (from x in data.Teachers
where x.Username.Equals(username)
select x).Count();
return(count != 0);
}
}
public bool DoesEmailExist(string email)
{
using (VCDataModelContainer data = new VCDataModelContainer())
{
int count = (from x in data.Teachers
where x.Email.Equals(email)
select x).Count();
if (count != 0)
{
return(true);
}
count = (from x in data.Students
where x.Email.Equals(email)
select x).Count();
return(count != 0);
}
}
