public async Task <IActionResult> SendMessage([FromForm] PostMessageViewModel postMessage)
        {
            try
            {
                var id = User.Claims.First(c => c.Type == "Id").Value;
                if (blackListService.HasUserInBlock(id, postMessage.ReceiverId))
                {
                    return(BadRequest("Unlock this user to send messages"));
                }
                if (blackListService.HasUserInBlock(postMessage.ReceiverId, id))
                {
                    return(BadRequest("This user reseieved access to sendind messages"));
                }
                if (postMessage.Attachment == null && postMessage.Text == null)
                {
                    return(BadRequest("You cannot send the empty message!"));
                }
                if (postMessage.Attachment != null)
                {
                    foreach (var file in postMessage.Attachment)
                    {
                        if (file.ContentType == "image/jpg" || file.ContentType == "image/jpeg" || file.ContentType == "audio/mp3" || file.ContentType == "video/mp4" || file.ContentType == "audio/mpeg")
                        {
                            if ((file.ContentType == "image/jpg" || file.ContentType == "image/jpeg") && file.Length >= 2097152)
                            {
                                return(BadRequest("Unsupported file length. JPG/JPEG must be before 2MB "));
                            }
                            else if ((file.ContentType == "audio/mp3" || file.ContentType == "audio/mpeg") && file.Length >= 10484760)
                            {
                                return(BadRequest("Unsupported file length. Audio files must be before 10MB "));
                            }
                            else if (file.ContentType == "video/mp4" && file.Length >= 31457280)
                            {
                                return(BadRequest("Unsupported file length. Video files must be before 10MB "));
                            }
                        }
                        else
                        {
                            return(BadRequest("Unsupported file type. Files must be only of 'jpg/jpeg', 'mp3', 'mp4' formats! "));
                        }
                    }
                }

                UserIds receiver, caller;
                chatHub.FindCallerReceiverByIds(postMessage.ReceiverId, id, out caller, out receiver);
                bool dialogExists = await chatService.IsExistDialog(caller.userId, postMessage.ReceiverId);

                if (dialogExists)
                {
                    var message = await chatService.AddNewMessage(caller.userId, postMessage, DateTime.Now);

                    if (chatService.IsOnline(postMessage.ReceiverId))
                    {
                        await hubContext.Clients.Client(receiver.connectionId).SendAsync("Send", message, caller.userId);

                        await hubContext.Clients.Clients(caller.connectionId).SendAsync("SendMyself", message);
                    }
                    else
                    {
                        await hubContext.Clients.Clients(caller.connectionId).SendAsync("SendMyself", message);
                    }
                    return(Ok(message));
                }
                else
                {
                    await chatService.CreateNewDialogAsync(caller.userId, postMessage.ReceiverId);

                    var message = await chatService.AddNewMessage(caller.userId, postMessage, DateTime.Now);

                    if (receiver != null)
                    {
                        if (chatService.IsOnline(postMessage.ReceiverId))
                        {
                            await hubContext.Clients.Client(receiver.connectionId).SendAsync("Send", message, caller.userId);

                            await hubContext.Clients.Clients(caller.connectionId).SendAsync("SendMyself", message);
                        }
                        else
                        {
                            await hubContext.Clients.Clients(caller.connectionId).SendAsync("SendMyself", message);
                        }
                    }
                    return(Ok(message));
                }
            }
            catch (Exception ex)
            {
                throw ex;
            }
        }