### Composer Installation for winzou/state-machine

Source: https://github.com/winzou/state-machine/blob/master/README.md

Specifies the dependency requirement for the winzou/state-machine library in a composer.json file. This ensures the library is correctly installed via Composer.

```js
{
    "require": {
        "winzou/state-machine": "~0.1"
    }
}
```

--------------------------------

### PHP State Machine Configuration with States, Transitions, and Callbacks

Source: https://github.com/winzou/state-machine/blob/master/README.md

Defines a state machine graph configuration in PHP, including states, transitions, and various types of callbacks (guard, before, after). This configuration is attached to a domain object to manage its state.

```php
$config = array(
    'graph'         => 'myGraphA', // Name of the current graph - there can be many of them attached to the same object
    'property_path' => 'stateA',  // Property path of the object actually holding the state
    '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'
        )
    ),
    'callbacks' => array(
        'guard' => array(
            'guard-cancel' => array(
                'to' => array('cancelled'), // Will be called only for transitions going to this state
                'do' => function() { var_dump('guarding to cancelled state'); return false; }
            )
        ),
        'before' => array(
            'from-checkout' => array(
                'from' => array('checkout'), // Will be called only for transitions coming from this state
                'do'   => function() { var_dump('from checkout transition'); }
            )
        ),
        'after' => array(
            'on-confirm' => array(
                'on' => array('confirm'), // Will be called only on this transition
                'do' => function() { var_dump('on confirm transition'); }
            ),
            'to-cancelled' => array(
                'to' => array('cancelled'), // Will be called only for transitions going to this state
                'do' => function() { var_dump('to cancel transition'); }
            ),
            'cancel-date' => array(
                'to' => array('cancelled'),
                'do' => array('object', 'setCancelled'),
            )
        )
    )
);
```

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