/// <summary>
/// Add user to course via UserAddCourseHelperModel
/// </summary>
public bool AddUserToCourse(AdminAddCourseToUserViewModel model)
{
var courseInstance = _db.CourseInstances.SingleOrDefault(x => x.Id == model.CourseId);
if (courseInstance == null)
{
return(false);
}
var user = _db.AspNetUsers.SingleOrDefault(x => x.Id == model.UserId);
if (user == null)
{
return(false);
}
if (model.Position == 1)
{
courseInstance.AspNetUsers.Add(user);
AddUserToCourseAssignments(user.Id, courseInstance.Id);
}
else
{
Teacher teacher = new Teacher {
AspNetUser = user,
IsAssistant = model.Position != 2
};
courseInstance.Teachers.Add(teacher);
if (!_userService.IsUserInRoleByUserId(user.Id, "Teacher"))
{
_userService.AddUserToRoleByUserId(user.Id, "Teacher");
}
}
try {
_db.SaveChanges();
return(true);
}
catch (Exception e) {
return(false);
}
}
/// <summary>
/// Remove a user from a course via UserAddCourseHelperModel which contains the course instance ID,
/// the user ID and the position the user currently occupies in the course.
/// </summary>
public bool RemoveUserFromCourse(AdminAddCourseToUserViewModel model)
{
var courseInstance = _db.CourseInstances.SingleOrDefault(x => x.Id == model.CourseId);
if (courseInstance == null)
{
return(false);
}
var user = _db.AspNetUsers.SingleOrDefault(x => x.Id == model.UserId);
if (user == null)
{
return(false);
}
if (model.Position == 1)
{
courseInstance.AspNetUsers.Remove(user);
}
else
{
var teacher = courseInstance.Teachers.SingleOrDefault(x => x.AspNetUser == user && x.IsAssistant == (model.Position != 2));
courseInstance.Teachers.Remove(teacher);
var teacherCourses = _db.CourseInstances.SingleOrDefault(x => x.Teachers.Any(y => y.AspNetUser.Id == user.Id));
if (teacherCourses != null && !teacherCourses.Teachers.Any())
{
_userService.RemoveUserFromRoleByUserId(user.Id, "Teacher");
}
}
try {
_db.SaveChanges();
return(true);
}
catch (Exception e) {
return(false);
}
}
/// <summary>
/// Adds user to course by passing a view model including the userId and the courseInstanceId
/// </summary>
public ActionResult AddUserToCourse(AdminAddCourseToUserViewModel model)
{
return(Json(_courseService.AddUserToCourse(model)));
}
/// <summary>
/// Removes user from course by passing a AddCourseToUserViewModel with the courseInstanceId and userId
/// </summary>
public ActionResult RemoveUserFromCourse(AdminAddCourseToUserViewModel model)
{
return(Json(_courseService.RemoveUserFromCourse(model)));
}
