PHP code example of hostnet / entity-tracker-component

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

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

    

hostnet / entity-tracker-component example snippets

use Acme\Component\Listener\ChangedAtListener;
use Hostnet\Component\EntityTracker\Listener\EntityChangedListener;
use Hostnet\Component\EntityTracker\Provider\EntityMetadataProvider;
use Hostnet\Component\EntityTracker\Provider\EntityMutationMetadataProvider;

/* @var $em \Doctrine\ORM\EntityManager */
$event_manager = $em->getEventManager();

// setup er(new DateTime());

// register the events
$event_manager->addEventListener('preFlush', $entity_changed_listener);
$event_manager->addEventListener('entityChanged', $listener);

namespace Acme\Component\Listener;

use Hostnet\Component\EntityTracker\Event\EntityChangedEvent;

class ChangedAtListener
{
    private $now;

    public function __construct(\DateTime $now)
    {
        $this->now = $now;
    }

    public function entityChanged(EntityChangedEvent $event)
    {
        if (!($entity = $event->getCurrentEntity()) instanceof UpdatableInterface) {
            // uses the tracked but might not have our method
            return;
        }

        $entity->setUpdatedAt($this->now);
    }
}

namespace Acme\Component\Listener;

interface UpdatableInterface
{
   public function setUpdatedAt(\DateTime $now);
}

use Acme\Component\Listener\UpdatableInterface;
use Doctrine\ORM\Mapping as ORM;
use Hostnet\Component\EntityTracker\Attributes\Tracked;

#[ORM\Entity]
#[Tracked]
class MyEntity implements UpdatableInterface
{
    #[ORM\Column]
    private $changed_at;

    public function setUpdatedAt(\DateTime $now)
    {
        $this->changed_at = $now;
    }
}

$entity->setName('henk');
$em->flush();
// Voila, your changed_at is filled in

use Hostnet\Component\EntityTracker\Attributes\Tracked;

#[\Attribute(\Attribute::TARGET_CLASS)]
class Changed extends Tracked
{
    public $ignore_fields = [];

    public function getIgnoredFields()
    {
        if (empty($this->ignore_fields)) {
            return ['id'];
        }

        return $this->ignore_fields;
    }
}

use Doctrine\ORM\EntityManagerInterface;
use Hostnet\Component\EntityTracker\Provider\EntityMetadataProvider;

class ChangedResolver
{
    private $attribute_class = Changed::class;

    private $provider;

    public function __construct(EntityMetadataProvider $provider)
    {
        $this->provider = $provider;
    }

    public function getChangedAttribute(EntityManagerInterface $em, $entity)
    {
        return $this->provider->getAttributeFromEntity($this->attribute_class, $em, $entity);
    }
}

use Hostnet\Component\EntityTracker\Event\EntityChangedEvent;

class ChangedListener
{
    private $resolver;

    public function __construct(ChangedResolver $resolver)
    {
        $this->resolver = $resolver;
    }

    public function entityChanged(EntityChangedEvent $event)
    {
        $em     = $event->getEntityManager();
        $entity = $event->getCurrentEntity();

        if (null === ($attribute = $this->resolver->getChangedAttribute($em, $entity))) {
            return;
        }

        $preferred_changes = array_diff($attribute->getIgnoredFields(), $event->getMutatedFields());

        // do something with them
    }
}