<?php

namespace Base\OAuthBundle\EventListener;

use Doctrine\ORM\Events;
use Doctrine\ORM\Event\LoadClassMetadataEventArgs;
use Doctrine\Common\EventSubscriber;

class DynamicRelationSubscriber implements EventSubscriber
{
    /**
     * {@inheritDoc}
     */
    public function getSubscribedEvents()
    {
        return array(
            Events::loadClassMetadata,
        );
    }

    /**
     * @param LoadClassMetadataEventArgs $eventArgs
     */
    public function loadClassMetadata(LoadClassMetadataEventArgs $eventArgs)
    {
        // the $metadata is the whole mapping info for this class
        $metadata = $eventArgs->getClassMetadata();
        $classes = array(
            'Base\OAuthBundle\Entity\AccessToken',
            'Base\OAuthBundle\Entity\AuthCode',
            'Base\OAuthBundle\Entity\RefreshToken'
        );
        
        if (!in_array($metadata->getName(), $classes)) {
            return;
        }
        
        $userClass = 'Base\UserBundle\Entity\User';
        $OAuthUserClass = '\Base\OAuthBundle\Security\Core\User\CustomOAuthUser';
        
        $metadata->mapManyToOne(array(
            'targetEntity'  => class_exists($userClass) ? $userClass : $OAuthUserClass,
            'fieldName'     => 'user'
        ));
    }
}