public async Task <IActionResult> Create(int Id, [Bind("Text")] string Text)
        {
            //if (ModelState.IsValid)
            if ((Text != null) && (Text.Length > 0))
            {
                User user;
                if (signInManager.IsSignedIn(User))
                {
                    user = (await signInManager.UserManager.GetUserAsync(User));
                }
                else
                {
                    // check api key
                    return(Json(JsonError.ERROR_ACCESS_DENIED));
                }

                Group group = await _context.Group.Include(g => g.Participants).Include(g => g.Admins).FirstOrDefaultAsync(g => g.Id.Equals(Id));

                bool b;
                if (!((User.IsInRole("Admin") || (GroupsController.CheckUserRightsToPost(group, user.Id, out b)))))
                {
                    return(Json(JsonError.ERROR_ACCESS_DENIED));
                }

                Comment comment = new Comment(Id, user.Id, Text);
                _context.Comment.Add(comment);
                await _context.SaveChangesAsync();

                return(await apiIndex(Id));
            }
            return(Json(new { error = "Data error" }));
        }
        public async Task <IActionResult> Create(string Id, [Bind("Text")] string Text)
        {
            //if (ModelState.IsValid)
            if (Text.Length > 0)
            {
                User user;
                if (signInManager.IsSignedIn(User))
                {
                    user = (await signInManager.UserManager.GetUserAsync(User));
                }
                else
                {
                    // check api key
                    return(Json(JsonError.ERROR_ACCESS_DENIED));
                }

                var document = await _context.Document.Include(d => d.Group).ThenInclude(g => g.Subscribers).Include(d => d.Group).ThenInclude(g => g.Participants).Include(d => d.Group).ThenInclude(g => g.Admins).Include(d => d.Comments).ThenInclude(c => c.User).Include(d => d.Likes)
                               .Include(d => d.User).FirstOrDefaultAsync(d => d.Id.Equals(Id));

                bool b;
                if (!((User.IsInRole("Admin")) || (document.GroupId == null) || (GroupsController.CheckUserRightsToPost(document.Group, user.Id, out b))))
                {
                    return(Json(JsonError.ERROR_ACCESS_DENIED));
                }
                Text = GroupsController.ClearBodyHtml(Text);
                Comment comment = new Comment(Id, user.Id, Text);
                _context.Comment.Add(comment);
                await _context.SaveChangesAsync();

                return(await apiIndex(Id));
            }
            return(Json(new { error = "Data error" }));
        }