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File: example/BuyMilk.php

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  Classes of Jorge Castro  >  PHP State Machine One  >  example/BuyMilk.php  >  Download  
File: example/BuyMilk.php
Role: Example script
Content type: text/plain
Description: Example script
Class: PHP State Machine One
Process transitions in a state machine
Author: By
Last change:
Date: 9 months ago
Size: 2,661 bytes
 

 

Contents

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<?php
/**
 * @author Jorge Patricio Castro Castillo <jcastro arroba eftec dot cl>
 * @link https://github.com/EFTEC/StateMachineOne
 */

use eftec\statemachineone\Job;
use
eftec\statemachineone\StateMachineOne;
use
eftec\statemachineone\Transition;

// we use autoload's composer, so we call it here.
include "../vendor/autoload.php";

$smachine=new StateMachineOne();
$smachine->setDebug(true);


// it is specific for this project
define('INITIAL_STATE',1);
define('DRIVING_TO_BUY_MILK',2);
define('CANCEL_DRIVING',3);
define('PICKING_THE_MILK',4);
define('PAYING_FOR_THE_MILK',5);
define('UNABLE_TO_PURCHASE',6);
define('DRIVE_BACK_HOME',7);
$smachine->setDefaultInitState(INITIAL_STATE);

$smachine->setStates([
   
INITIAL_STATE=>'Initial State',
   
DRIVING_TO_BUY_MILK=>'Driving to buy milk',
   
CANCEL_DRIVING=>'Cancel driving.',
   
PICKING_THE_MILK=>'Picking the milk',
   
PAYING_FOR_THE_MILK=>'Paying for the milk',
   
UNABLE_TO_PURCHASE=>'Unable to purchase',
   
DRIVE_BACK_HOME=>'Drive back home.'
]);

$smachine->fieldDefault=[
   
'milk'=>0
   
,'money'=>9999
   
,'price'=>null
   
,'stock_milk'=>null
   
,'store_open'=>null
   
,'gas'=>10];

// database configuration
$smachine->tableJobs="buymilk_jobs";
$smachine->tableJobLogs="buymilk_logs"; // it is optional
$smachine->setDB('localhost',"root","abc.123","statemachinedb");
$smachine->createDbTable(false); // you don't need to create this table every time.

$smachine->loadDBAllJob(); // we load all jobs, including finished ones.
//$smachine->loadDBActiveJobs(); // use this in production, we don't need stopped job every time.


// 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');

$msg=$smachine->fetchUI(); // we show a visual id (it is optional and it's only for debug purpose)
$smachine->checkAllJobs(); // we check every (active,pause,continue) job available.

$smachine->viewUI(null,$msg); // null means it takes the current job