private async Task Submit(string type)
        {
            string vehicleId;
            string authToken = (Application.Current as App).UserAuthToken;

            TyreType = type;

            string jsonData = string.Empty;

            if (type == CommonConstants.SameTypeTyre)
            {
                vehicleId           = VehicleList.Where(v => v.VehicleNo == SameTyreSelectedVehicle).FirstOrDefault()?.VehicleId;
                SameTyre.TyreStatus = SameTypeTyreStatus;

                if (!ValidateFields())
                {
                    return;
                }

                jsonData = JsonConvert.SerializeObject(
                    new
                {
                    authToken,
                    vehicleId,
                    TyreType,
                    SameTyre
                });
            }
            else
            {
                vehicleId = VehicleList.Where(v => v.VehicleNo == DifferentTyreSelectedVehicle).FirstOrDefault()?.VehicleId;
                DifferentTypeTyre.FrontTyre.TyreStatus = DifferentTypeFrontTyreStatus;
                DifferentTypeTyre.RearTyre.TyreStatus  = DifferentTypeRearTyreStatus;

                if (!ValidateFields())
                {
                    return;
                }

                jsonData = JsonConvert.SerializeObject(
                    new
                {
                    authToken,
                    vehicleId,
                    TyreType,
                    DifferentTypeTyre
                });
            }

            var result = await restServices.AddTyreInfo(jsonData);

            if (result.Status == CommonConstants.SuccessStatus)
            {
            }
        }
        public TyreViewModel(IPageService pageService, string authToken)
        {
            restServices     = new RestServices();
            this.pageService = pageService;
            Task.Run(async() =>
            {
                VehicleList   = await restServices.GetVehicleList((Application.Current as App).UserAuthToken);
                VehicleNoList = VehicleList.Select(l => l.VehicleNo).ToList();
            });

            SameTyre          = new Tyre();
            DifferentTypeTyre = new DifferentTypeTyre
            {
                FrontTyre = new Tyre(),
                RearTyre  = new Tyre()
            };
            TyreStatusList = new List <string>()
            {
                CommonConstants.NewTyreType,
                CommonConstants.OldTyreType
            };

            SubmitCommand = new Command <string>(async(type) => await Submit(type));
        }