BuyMilk4

BuyMilk4.php

<?php

// business rules
$smachine->addTransition(INITIAL_STATE,DRIVING_TO_BUY_MILK
	,'when milk = 0 and gas > 0');
$smachine->addTransition(INITIAL_STATE,CANCEL_DRIVING
	,'when gas = 0',null,'stop'); // null means, no timeout and stop means, the job will stop
$smachine->addTransition(DRIVING_TO_BUY_MILK,PICKING_THE_MILK
	,'when store_open = 1 and stock_milk > 0');
$smachine->addTransition(DRIVING_TO_BUY_MILK,UNABLE_TO_PURCHASE
	,'when store_open = 0 or stock_milk = 0');
$smachine->addTransition(PICKING_THE_MILK,PAYING_FOR_THE_MILK
	,'when money >= price set milk = 1');
$smachine->addTransition(PICKING_THE_MILK,UNABLE_TO_PURCHASE
	,'when money < price');
$smachine->addTransition(UNABLE_TO_PURCHASE,DRIVE_BACK_HOME
	,'when timeout',0,'stop');
$smachine->addTransition(PAYING_FOR_THE_MILK,DRIVE_BACK_HOME
	,'when timeout',0,'stop');