PHP code example of lesichkovm / php-state-machine

    
        
<?php
require_once('vendor/autoload.php');

/* Start to develop here. Best regards https://php-download.com/ */

    

lesichkovm / php-state-machine example snippets

$config = [
    'states' => array(
        'checkout',
        'pending',
        'confirmed',
        'cancelled'
    ),
    'transitions' => array(
        'create' => array(
            'from' => array('checkout'),
            'to' => 'pending'
        ),
        'confirm' => array(
            'from' => array('checkout', 'pending'),
            'to' => 'confirmed'
        ),
        'cancel' => array(
            'from' => array('confirmed'),
            'to' => 'cancelled'
        )
    ),
];
$stateMachine = new \App\Helpers\StateMachine;
$stateMachine->setConfig($config);

var_dump($stateMachine->getState());

// Return true, we can apply this transition
var_dump($stateMachine->canTransition('create'));
var_dump($stateMachine->applyTransition('create'));

// All possible transitions for pending state are just "confirm"
var_dump($stateMachine->getPossibleTransitions());

var_dump($stateMachine->getHistory());

$stateMachine = new StateMachine();
file_put_contents('sm.json', $stateMachine->toString());

$stateMachine = new StateMachine();
$stateMachine->fromString(json_decode(file_get_contents('sm.json'), true));

class SmartLamp extends StateMachine
{
    const STATE_OFF = "off";
    const STATE_ON = "on";

    const TRANSITION_TO_ON = "to_on";
    const TRANSITION_TO_OFF = "to_off";

    public $dayOrNight = "day";

    function __construct()
    {
        //parent::__construct();
        $config = [
            "states" => [
                self::STATE_OFF,
                self::STATE_ON,
            ],
            "transitions" => array(
                self::TRANSITION_TO_ON => array(
                    "from" => array(self::STATE_OFF),
                    "to" => self::STATE_ON,
                    "validators" => [
                        [$this, "validateIsNight"],
                    ]
                ),
                self::TRANSITION_TO_OFF => array(
                    "from" => array(self::STATE_ON),
                    "to" => self::STATE_OFF
                ),
            ),
        ];
        $this->setConfig($config);
    }

    function validateIsNight()
    {
        return $this->dayOrNight == "night";
    }
}

$lamp = new SmartLamp;

$lamp->dayOrNight = "day"; // We tell the lamp its day

// This will not execute, as its currently day time
if ($lamp->canTransition(SmartLamp::TRANSITION_TO_ON)) {
    $lamp->applyTransition(SmartLamp::TRANSITION_TO_ON);
}

$lamp->dayOrNight = "night"; // Now we tell the lamp its night

// This will execute, as its currently night time
if ($lamp->canTransition(SmartLamp::TRANSITION_TO_ON)) {
    $lamp->applyTransition(SmartLamp::TRANSITION_TO_ON);
}