public IActionResult AddNewDevice(DeviceDetailsViewModel device)
        {
            if (ModelState.IsValid)
            {
                //check if manufacturer exists. If not, create it.
                Manufacturer manufacturer = _manufacturerRepository.GetManufacturerByName(device.ManufacturerName);
                if (manufacturer == null)
                {
                    Manufacturer newManufacturer = new Manufacturer()
                    {
                        Name = device.ManufacturerName
                    };
                    _manufacturerRepository.AddNewManufacturer(newManufacturer);
                    manufacturer = _manufacturerRepository.GetManufacturerByName(device.ManufacturerName);
                }

                Models.Type type = _typeRepository.GetTypeByName(device.TypeName);
                if (type == null)
                {
                    Models.Type newType = new Models.Type()
                    {
                        Name = device.TypeName
                    };
                    _typeRepository.AddNewType(newType);
                    type = _typeRepository.GetTypeByName(device.TypeName);
                }

                Models.OperatingSystem operatingSystem = _operatingSystemRepository.GetOperatingSystemByName(device.OperatingSystemName);
                if (operatingSystem == null)
                {
                    Models.OperatingSystem newOS = new Models.OperatingSystem()
                    {
                        Name = device.OperatingSystemName
                    };
                    _operatingSystemRepository.AddNewOperatingSystem(newOS);
                    operatingSystem = _operatingSystemRepository.GetOperatingSystemByName(device.OperatingSystemName);
                }

                OSversion osVersion = _osVersionRepository.GetOSversionByName(device.OSversionName);
                if (osVersion == null)
                {
                    OSversion newOSversion = new OSversion()
                    {
                        Name = device.OSversionName
                    };
                    _osVersionRepository.AddNewOSversion(newOSversion);
                    osVersion = _osVersionRepository.GetOSversionByName(device.OSversionName);
                }

                Processor processor = _processorRepository.GetProcessorByName(device.ProcessorName);
                if (processor == null)
                {
                    Processor newProcessor = new Processor()
                    {
                        Name = device.ProcessorName
                    };
                    _processorRepository.AddNewProcessor(newProcessor);
                    processor = _processorRepository.GetProcessorByName(device.ProcessorName);
                }

                RAMamount ramAmount = _ramAmountRepository.GetRAMamountBySize(device.RAMamountSize);
                if (ramAmount == null)
                {
                    RAMamount newRAMamount = new RAMamount()
                    {
                        Size = device.RAMamountSize
                    };
                    _ramAmountRepository.AddNewRAMamount(newRAMamount);
                    ramAmount = _ramAmountRepository.GetRAMamountBySize(device.RAMamountSize);
                }
                User user = _userRepository.GetUserByName(device.UserName);

                Device newDevice = new Device()
                {
                    Name              = device.Name,
                    ManufacturerId    = manufacturer.ManufacturerId,
                    Manufacturer      = manufacturer,
                    TypeId            = type.Id,
                    Type              = type,
                    OperatingSystemId = operatingSystem.Id,
                    OperatingSystem   = operatingSystem,
                    OSversionId       = osVersion.Id,
                    OSversion         = osVersion,
                    ProcessorId       = processor.Id,
                    Processor         = processor,
                    RAMamountId       = ramAmount.Id,
                    RAMamount         = ramAmount,
                    UserId            = user.Id,
                    User              = user
                };
                _deviceRepository.AddNewDevice(newDevice);
                return(RedirectToAction("DeviceAdded"));
            }
            else
            {
                return(View(device));
            }
        }