/*
* returns users with current UserState(user) for mainGroup(group)
* if checkName then checks if groupName == null (userHasn't any group) || comparesName - user is in current Group
*/
public async Task RefreshGroupOfUsersTypeAsync(IEnumerable<String> userNames, Group group, ApplicationDbContext appContext, CourseUsers userType, CourseUsers defaultType)
{
if (userNames == null)
{
Group[] groups = await appContext.Groups
.Where(g => String.Compare(g.Name, group.Name, false) == 0 && g.UserState_ID == (Int32)userType).ToArrayAsync();
foreach (var gr in groups)
{
gr.UserState_ID = (Int32)defaultType;
gr.Name = null;
appContext.Entry(gr).State = EntityState.Modified;
}
}
else
{
/*updating role for users*/
Int32 currentRole = (Int32)userType;
Group[] groups = await appContext.Users
.Where(u => userNames.Contains(u.UserName))
.Select(u => u.Groups.FirstOrDefault(g => g.Course_ID == group.Course_ID))
.ToArrayAsync();
foreach (var i in groups)
{
i.Name = group.Name;
i.UserState_ID = (Int32)userType;
appContext.Entry(i).State = EntityState.Modified;
}
ApplicationUser[] users = await appContext.Users
.Where(u => !userNames.Contains(u.UserName)).ToArrayAsync();
Group selected = null;
if (users != null)
{
foreach (var user in users)
{
if (user.Groups.Any(g => String.Compare(g.Name, group.Name, false) == 0 && g.UserState_ID == currentRole))
{
selected = user.Groups.First(g => String.Compare(g.Name, group.Name, false) == 0 && g.UserState_ID == currentRole);
selected.Name = null;
selected.UserState_ID = (Int32)defaultType;
appContext.Entry(selected).State = EntityState.Modified;
}
}
}
}
}
public async Task<ActionResult> Join(String userName, Int32? id)
{
try
{
if (id != null)
{
Course course = await appContext.Courses.FindAsync(id);
await appContext.Users.LoadAsync();
ApplicationUser user = await appContext.Users.Where(u => String.Compare(u.UserName, userName, false) == 0).FirstAsync();
if (user != null)
{
if (!await appContext.Groups.AnyAsync(g => g.Course_ID == id && String.Compare(g.User.Id, user.Id, false) == 0))
{
Group group = new Group
{
Course_ID = course.ID,
Course = course,
UserState_ID = (Int32)CourseUsers.Learner,
User = user,
Duration = DateTime.Now,
Start = DateTime.Now,
Finish = DateTime.Now,
TotalScore = 0
};
appContext.Groups.Add(group);
await appContext.SaveChangesAsync();
return RedirectToAction("Details", new { id = course.ID, join = "Вашу заявку прийнято." });
}
else if (user.Groups.Any(g => g.Course_ID == id && g.Name != null))
return RedirectToAction("Index", "Topics", new { id = course.ID });
}
return RedirectToAction("Details", new { id = course.ID, join = "Ви вже подавали заявку." });
}
return new HttpStatusCodeResult(HttpStatusCode.BadRequest, "Can't find this course , please, try again later!");
}
catch (InvalidOperationException)
{
//first error
return new HttpStatusCodeResult(HttpStatusCode.BadRequest, "Can't find user, please try to log in");
}
}
public async Task<IList<Group>> UpdateUserStatsInGroupAsync(IEnumerable<String> users, Group mainGroup, ApplicationDbContext appContext, ApplicationUserManager userManager, params String[] checkableRoles)
{
if (users != null && mainGroup != null && appContext != null)
{
Course groupCourse = await appContext.Courses.FindAsync(mainGroup.Course_ID);
if (groupCourse != null)
{
IList<String> userRoles = null;
List<Group> groups = new List<Group>();
CourseUsers user;
for (Int32 i = 0; i < users.Count(); i++)
{
userRoles = await userManager.GetRolesAsync(await GetUsersIdFromName(users.ElementAt(i), appContext));
user = CheckUserForRoles(checkableRoles, userRoles, CourseUsers.Student);
IList<Group> gr = await ChangeCourseUserGroupAsync(new String[] { users.ElementAt(i) }, appContext, groupCourse, user, false);
if (gr.Count > 0)
{
CopyMainDataOfGroupTo(mainGroup, gr.First());
groups.Add(gr.First());
}
}
return groups;
}
}
return new List<Group>();
}
/*
* Updates all users group stats to new, for example learner -> teacher or learner -> student
* checkableRoles - list of roles to check in userManager, for example:
* learner can't be a teacher or if user has teachers role he will be automatically add to teachers of this group
* this method also updates all group info: name, dates etc.... for each user with role of student or teacher
*/
public async Task RefreshAllGroupsDataAsync(String oldName, Group group, ApplicationDbContext appContext)
{
if (oldName != null && group != null && appContext != null)
{
Group[] groups = await appContext.Groups.Where(g => String.Compare(g.Name, oldName, false) == 0).ToArrayAsync();
foreach (var gr in groups)
{
CopyMainDataOfGroupTo(group, gr);
appContext.Entry(gr).State = EntityState.Modified;
}
}
}
public Boolean CheckUserForRoleInMainGroup(ApplicationUser user, Group group, 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 == group.Course_ID && g.UserState_ID == (Int32)uGroupRole))
return true;
}
}
return false;
}
/*
* Copies data from one group to another
* It will be better to override method CopyTo or others in Group entity
*/
private void CopyMainDataOfGroupTo(Group from, Group to)
{
if (from != null && to != null)
{
to.Finish = from.Finish;
to.Start = from.Start;
to.Duration = from.Duration;
to.Name = from.Name;
}
}
/*
* Search users to change their roles
* for example if someone deleted user from group
* user status changes to defaultUser status
* USE DBSAVECHANGES AFTER THIS METHOD
*/
public async Task<IList<Group>> ClearUsersWithOldRoles(IEnumerable<String> users, Group group, ApplicationDbContext appContext, CourseUsers defaultUser)
{
IEnumerable<ApplicationUser> foundUsers = await appContext.Users.Where(u => !users.Contains(u.UserName)).ToArrayAsync();
List<Group> editableGroups = new List<Group>();
Course course = await appContext.Courses.FindAsync(group.Course_ID);
if (foundUsers != null && course != null)
{
ApplicationUser foundUser = null;
for (Int32 i = 0; i < foundUsers.Count(); i++)
{
foundUser = foundUsers.ElementAt(i);
editableGroups.AddRange(await appContext.Groups.Where(g => g.Course_ID == course.ID && g.User.Id == foundUser.Id).ToArrayAsync());
}
foreach (var gr in editableGroups)
{
gr.UserState_ID = (Int32)defaultUser;
gr.Name = null;
}
}
return editableGroups;
}
public async Task<IList<ApplicationUser>> GetUsersFromMainGroupAsync(ApplicationDbContext appContext, Group group, CourseUsers user, Boolean checkName = false)
{
List<ApplicationUser> users = new List<ApplicationUser>();
try
{
if (group != null)
{
Int32 userState = (Int32)user;
/*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 == group.Course_ID && gr.UserState_ID == userState && (checkName ? String.Compare(group.Name, gr.Name, false) == 0 : gr.Name == null))
)
.ToListAsync());
}
return users;
}
catch (NullReferenceException)
{
return users;
}
}
