public async Task <NoteHeader> Create(Notes2021.Models.TextViewModel inputModel)
        {
            string authHeader = Request.Headers["authentication"];

            string[]     auths = authHeader.Split(',');
            IdentityUser me    = await _userManager.FindByIdAsync(auths[1]);

            UserData appMe = await _context.UserData.SingleAsync(p => p.UserId == me.Id);

            if (String.Compare(auths[2], appMe.MyGuid, StringComparison.Ordinal) != 0)
            {
                return(null);
            }
            string     userID = auths[1];
            NoteAccess myAcc  = await AccessManager.
                                GetAccess(_context, userID, inputModel.NoteFileID, 0);

            if (!myAcc.Write)
            {
                return(null);
            }

            await _signInManager.SignInAsync(me, false);

            DateTime now = DateTime.Now.ToUniversalTime();

            NoteHeader nheader = new NoteHeader()
            {
                LastEdited       = now,
                ThreadLastEdited = now,
                CreateDate       = now,
                NoteFileId       = inputModel.NoteFileID,
                AuthorName       = appMe.DisplayName,
                AuthorID         = _userManager.GetUserId(User),
                NoteSubject      = inputModel.MySubject,
                ResponseOrdinal  = 0,
                ResponseCount    = 0
            };

            if (inputModel.BaseNoteHeaderID == 0)
            {
                return(await NoteDataManager
                       .CreateNote(_context, _userManager, nheader,
                                   inputModel.MyNote.Replace("\n", "<br />"),
                                   inputModel.TagLine,
                                   inputModel.DirectorMessage, true, false));
            }
            NoteHeader bnh = await NoteDataManager.GetNoteHeader(_context, inputModel.BaseNoteHeaderID);

            nheader.BaseNoteId = bnh.Id;
            return(await NoteDataManager.CreateResponse(_context, _userManager,
                                                        nheader, inputModel.MyNote, inputModel.TagLine,
                                                        inputModel.DirectorMessage, true, false));
        }
        public async Task <NoteHeader> Edit(Notes2021.Models.TextViewModel inputModel)
        {
            string authHeader = Request.Headers["authentication"];

            string[]     auths = authHeader.Split(',');
            IdentityUser me    = await _userManager.FindByIdAsync(auths[1]);

            UserData appMe = await _context.UserData.SingleAsync(p => p.UserId == me.Id);

            if (String.Compare(auths[2], appMe.MyGuid, StringComparison.Ordinal) != 0)
            {
                return(null);
            }
            string     userID = auths[1];
            NoteAccess myAcc  = await AccessManager.GetAccess(_context, userID, inputModel.NoteFileID, 0); //TODO

            if (!myAcc.Write)
            {
                return(null);
            }

            await _signInManager.SignInAsync(me, false);

            DateTime now = DateTime.Now.ToUniversalTime();

            NoteHeader oheader = await NoteDataManager
                                 .GetBaseNoteHeaderById(_context, inputModel.NoteID);

            if (oheader.AuthorID != userID) // must be a note this user wrote.
            {
                return(null);
            }

            oheader.LastEdited       = now;
            oheader.ThreadLastEdited = now;
            oheader.NoteSubject      = inputModel.MySubject;

            NoteContent oContent = await NoteDataManager
                                   .GetNoteContent(_context, oheader.NoteFileId, 0, oheader.NoteOrdinal, oheader.ResponseOrdinal); //TODO

            oContent.NoteBody        = inputModel.MyNote;
            oContent.DirectorMessage = inputModel.DirectorMessage;

            return(await NoteDataManager
                   .EditNote(_context, _userManager, oheader, oContent, inputModel.TagLine));
        }