Пример #1
0
        public MenuStateMachineState ValidateStateTransition(int userInput, MenuStateMachineState currentState, IBeverage beverage = null)
        {
            switch (currentState)
            {
            case MenuStateMachineState.Initialized:
                if (userInput == 1)
                {
                    return(MenuStateMachineState.OrderingBeverage);
                }
                else
                {
                    return(MenuStateMachineState.Exit);
                }

            case MenuStateMachineState.OrderingBeverage:
                if (userInput >= 1 && userInput <= 10)
                {
                    if (beverage.HasStandardSize() && !beverage.HasCoffee())
                    {
                        return(MenuStateMachineState.Finished);
                    }

                    if (beverage.HasStandardSize() && beverage.HasCoffee())
                    {
                        return(MenuStateMachineState.SelectCoffeeType);
                    }

                    if (!beverage.HasStandardSize())
                    {
                        return(MenuStateMachineState.SelectBeverageSize);
                    }
                }
                return(MenuStateMachineState.OrderingBeverage);

            case MenuStateMachineState.SelectBeverageSize:
                if (userInput >= 1 && userInput <= 4)
                {
                    if (beverage.HasCoffee())
                    {
                        return(MenuStateMachineState.SelectCoffeeType);
                    }
                    else
                    {
                        return(MenuStateMachineState.Finished);
                    }
                }
                return(MenuStateMachineState.SelectBeverageSize);

            case MenuStateMachineState.SelectCoffeeType:
                if (userInput >= 1 && userInput <= 2)
                {
                    return(MenuStateMachineState.Finished);
                }
                return(MenuStateMachineState.SelectBeverageSize);

            case MenuStateMachineState.Finished:
                return(MenuStateMachineState.Exit);

            default:
                return(MenuStateMachineState.Exit);
            }
        }