<?php
// app/Traits/Statable.php

namespace App\Traits

use SM\Factory\FactoryInterface;

trait Statable
{
    /**
     * @var StateMachine $stateMachine
     */
    protected $stateMachine;

    public function getStateMachine()
    {
        if (!$this->stateMachine) {
            $this->stateMachine = app(FactoryInterface::class)->get($this, self::SM_CONFIG);
        }
        return $this->stateMachine;
    }

    public function state($transition = null)
    {
        if ($transition) {
            return $this->getStateMachine()->apply($transition);
        }
        else {
            return $this->getStateMachine()->getState();
        }
    }

    public function transitionAllowed($transition)
    {
        return $this->getStateMachine()->can($transition);
    }

    public function history()
    {
        return $this->hasMany(self::HISTORY_MODEL);
    }
}