PHP code example of daveawb / understated

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

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

    

daveawb / understated example snippets

'providers' => [
    // ...
    UnderStated\Providers\UnderStatedServiceProvider::class,
]

use UnderStated\States\State;

$builder = new UnderStated\Builders\GraphBuilder();

$fsm = $builder->create()

    // Create an 'on' state
    ->state('on', function() { /* state is on */ })

    // Create an 'off' state
    ->state('off', function() { /* state is off */ }, State::INITIAL)

    // Create a transition (undirected) between the two states
    ->transition('on', 'off', true)

    // Get the FSM instance
    ->get();

// Initialise using the state marked with State::INITIAL or the first state added.
$fsm->initialise();

// If you want to override the initial state, pass it in to the `initialise` method
$fsm->initialise('on');

$fsm->transition('on');

echo ($fsm->getState()->getId()); // outputs 'on'

$fsm->transition('off');

echo ($fsm->getState()->getId()); // outputs 'off'

/**
 * Automatically called when this state is transitioned to. Returning false from
 * this method will block the transition attempt and the previous state will
 * remain as the active state.
 *
 * @param  State $previousState
 * @return boolean
 */
public function onEnter(State $previousState)

/**
 * Automatically called when this state is transitioned from. Returning false from
 * this method will block the transition attempt and the current state will
 * remain as the active state.
 *
 * @param  State $nextState
 * @return boolean
 */
public function onExit(State $nextState)

public function onReset()
{
    // <-- Clean up logic here

    parent::onReset();
}

use UnderStated\State;

class StateOne extends State
{
    /**
     * @param State
     * @return bool
     */
    public function onEnter(State $previous)
    {
        $this->handle('myHandle');

        return true;
    }

    /**
     * A state handler
     */
    public function myHandle()
    {
        // I'm handled when the state changes
    }

    /**
     * @param State
     * @return boolean
     */
    public function onExit(State $next)
    {
        // Will return true if unimplemented
        return true;
    }
}

$builder->create()
    ->state('on', StateOne::class)