/*GROUP ACTIONS*/
/*
* Returns List of users groups with modified UserState_ID == user
* users - list of usernames which will be modified
* if exception then returns current list of groups
* DOESN'T CHECK CURRENT USERS ROLES!!!
*/
public async Task<IList<Group>> ChangeCourseUserGroupAsync(IEnumerable<String> users, ApplicationDbContext appContext, Course course, CourseUsers user, Boolean addNever = true)
{
List<Group> groups = new List<Group>();
try
{
if (users != null && course != null)
{
Int32 userType = (Int32)user;
Group currGroup = null;
String currUser = null;
for (Int32 i = 0; i < users.Count(); i++)
{
currUser = users.ElementAt(i);
currGroup = await appContext.Groups
.Where(g => String.Compare(g.User.UserName, currUser, true) == 0 && g.Course_ID == course.ID)
.FirstAsync();
if (!addNever || currGroup.UserState_ID != userType)
{
currGroup.UserState_ID = userType;
groups.Add(currGroup);
}
}
}
return groups;
}
catch (InvalidOperationException)
{
return groups;
}
catch (NullReferenceException)
{
return groups;
}
}
public ActionResult addCourse(Course model)
{
try
{
if (model.Name != "" && model.Description != "")
{
model.DateCreated = DateTime.Now.ToUniversalTime();
model.Active = 1;
db.Courses.Add(model);
db.SaveChanges();
return Json(new { Message = "success" });
}
else
{
throw new Exception("not all fields are filled");
}
}
catch (Exception e)
{
return Json(new { Message = e.Message.ToString() });
}
}
/*
* Checks if this user has role in the group
*/
public Boolean CheckGroupUserForRole(ApplicationUser user, Course course, String groupName, params String[] roles)
{
CourseUsers uGroupRole;
for (Int32 i = 0; i < roles.Length; i++)
{
if (Enum.TryParse(roles[i], out uGroupRole))
{
if (user.Groups.Any(g => g.Course_ID == course.ID && g.UserState_ID == (Int32)uGroupRole && (String.Compare(g.Name, groupName, false) == 0 || g.Name == null)))
return true;
}
}
return false;
}
public async Task<IList<ApplicationUser>> GetUserWithDefRoleAndCurrCourse(ApplicationDbContext appContext, ApplicationUserManager userManager, Course course, String groupName, String userRole, params String[] groupRoles)
{
List<ApplicationUser> foundUsers = new List<ApplicationUser>();
try
{
if (appContext != null && userManager != null)
{
IList<ApplicationUser> users = await appContext.Users.ToListAsync();
/*get all teachers to List*/
IList<String> userRoles = null;
for (Int32 i = 0; i < users.Count; i++)
{
userRoles = await userManager.GetRolesAsync(users[i].Id);
if (userRoles.Contains(userRole))
foundUsers.Add(users[i]);
}
}
IEnumerable<ApplicationUser> usersWithRole = foundUsers.Where(u => CheckGroupUserForRole(u, course, groupName, groupRoles));
if (usersWithRole != null)
return usersWithRole.ToArray();
return new List<ApplicationUser>();
}
catch (InvalidOperationException)
{
return new List<ApplicationUser>();
}
catch (NullReferenceException)
{
return new List<ApplicationUser>();
}
}
/*
* Gets ALL users of current group(user)
* if exception then returns current list of groups
*/
public async Task<IList<ApplicationUser>> GetAllUsersFromGroupsAsync(ApplicationDbContext appContext, Course course)
{
List<ApplicationUser> users = new List<ApplicationUser>();
try
{
if (course != null)
{
users.AddRange(await appContext.Users.Where
(
u => u.Groups
.Any(gr => gr.Course_ID == course.ID)
)
.ToListAsync());
}
return users;
}
catch (NullReferenceException)
{
return users;
}
}
/*
* Gets all users of current group(user) type
* if exception then returns current list of users
*/
public async Task<IList<ApplicationUser>> GetUsersFromGroupsAsync(ApplicationDbContext appContext, Course course, CourseUsers userType, Boolean checkGroupName = false)
{
List<ApplicationUser> users = new List<ApplicationUser>();
try
{
if (course != null)
{
Int32 userState = (Int32)userType;
/*adds users with groups where names == null which means that user is not in any main group*/
users.AddRange(await appContext.Users.Where
(
u => u.Groups
.Any(gr => gr.Course_ID == course.ID && gr.UserState_ID == userState && checkGroupName ? gr.Name == null : true)
)
.ToListAsync());
}
return users;
}
catch (NullReferenceException)
{
return users;
}
}
/*
* removes all tags from current course
*/
public static void RemoveTagsFromCourse(Course course)
{
if (course != null && course.CourseTags != null && course.CourseTags.Count != 0)
{
for (Int32 i = 0; i < course.CourseTags.Count; i++)
course.CourseTags.Remove(course.CourseTags.ElementAt(i));
}
}
/*
* Initializes courses cshedules, topics and tags in new thread
*/
public static Task InitializeCourseDetailsComponentsAsync(Course course, ApplicationDbContext appContext)
{
return Task.Factory.StartNew(() =>
{
if (!appContext.Entry(course).Collection(c => c.Topics).IsLoaded)
appContext.Entry(course).Collection(c => c.Topics).Load();
if (!appContext.Entry(course).Collection(c => c.CourseTags).IsLoaded)
appContext.Entry(course).Collection(c => c.CourseTags).Load();
});
}
/*USABLE METHODS*/
/*
* Saving course file (image from local computer or by url)
* file - file from users local PC
* fileSite - url of image
* course - course to save image
* serverMapPath - path on server to save image:
* for example:
* serverMapPAth - C://aaaa//aaa//
* image new path - C://aaaa//aaa//Course{ID}//Course{ID}.extention
*/
public static Boolean SaveCourseFile(HttpPostedFileBase file, String fileSite, Course course, String serverMapPath, String fileNameBegin = "Course", Boolean save = true)
{
if (file != null)
{
String fileName = fileNameBegin + course.ID.ToString();
String imagePath = SaveImagePersonToFolder(fileName, file, serverMapPath);
if (imagePath != String.Empty)
{
course.Image = imagePath;
return true;
}
}
///*saving images http
else if (fileSite != String.Empty)
{
if (CourseHelper.ValidateHttpImageRoute(fileSite))
{
course.Image = fileSite;
return true;
}
}
else if (save)
{
course.Image = defaultImagePath;
return true;
}
/*saving image is not main task*/
if (!save)
return true;
return false;
}
public ActionResult CreateCourse(CreateCourseViewModel model)
{
ViewBag.AtEarliest = DateTime.Today.AddDays(1);
Menu(Home: true);
SetBreadcrumbs(
one: new MenyItem { Link = "~/Teacher/", Text = "Se alla kurser" });
if (!ModelState.IsValid)
{
return View(model);
}
model.StartDate = new DateTime(model.StartDate.Year, model.StartDate.Month, model.StartDate.Day, 0, 0, 0);
model.EndDate = new DateTime(model.EndDate.Year, model.EndDate.Month, model.EndDate.Day, 23, 59, 0);
bool hasError = false;
if (model.StartDate < DateTime.Today.AddDays(1))
{
ModelState.AddModelError("StartDate", "Startdatum kan tyvärr ej starta innan morgondagen, pga. planeringstid");
hasError = true;
}
if (model.EndDate < model.StartDate)
{
ModelState.AddModelError("EndDate", "Slutdatumet kan ej vara innan startdatumet");
hasError = true;
}
if (db.Courses.FirstOrDefault(c => c.Name == model.Name) != null)
{
ModelState.AddModelError("Name", "Namnet för denna kurs är redan upptagen");
}
if (hasError)
{
return View(model);
}
Course course = new Course { Name = model.Name, Description = (model.Description != null ? model.Description : ""), StartDate = model.StartDate, EndDate = model.EndDate };
db.Courses.Add(course);
db.SaveChanges();
return Redirect("~/Teacher/Course/"+ course.Id);
}