public IActionResult JoinGroup(int id)
{
var group = _groupHandler.GetById(id);
var user = _userManager.GetUserAsync(User).Result;
if (user.UsersInGroup == null)
{
user.UsersInGroup = new List <UsersInGroup>();
}
if (_usersInGroupHandler.GetUserInGroup(id, user.Id) == null)
{
_usersInGroupHandler.AddUserInGroup(group, user.Id);
return(RedirectToAction("Groups", "Chat", new { id }));
}
else
{
ModelState.AddModelError("JoinGroup", "You already joined");
return(RedirectToAction("Groups", "Chat", new { id }));
}
}
