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xiidea_easy_audit:
    entity_class : MyProject\Bundle\MyBundle\Entity\AuditLog                
    entity_event_resolver : audit_trail.entity_event_resolver      
    
services:
    audit_trail.entity_event_resolver:
        class: MyProject\Bundle\MyBundle\Resolver\EntityEventResolver
        calls:
            - [ setContainer,[ @service_container ] ]

<?php

namespace MyProject\Bundle\MyBundle\Resolver;

use Symfony\Component\EventDispatcher\Event;
use Xiidea\EasyAuditBundle\Events\DoctrineEntityEvent;
use Xiidea\EasyAuditBundle\Resolver\EntityEventResolver as BaseResolver;

class EntityEventResolver extends BaseResolver
{
    /**
     * @param Event|DoctrineEntityEvent $event
     * @param $eventName
     *
     * @return array
     */
    public function getEventLogInfo(Event $event, $eventName)
    {
        if (!$event instanceof DoctrineEntityEvent) {
            return null;
        }
        $this->initialize($event, $eventName);
        $changesMetaData = $this->getChangeSets($this->entity);
        if ($this->isUpdateEvent() && $changesMetaData == NULL) {
            return NULL;
        }
        $reflectionClass = $this->getReflectionClassFromObject($this->entity);
        $typeName = $reflectionClass->getShortName();
        $eventType = $this->getEventType($typeName);
        $eventDescription = $this->getDescriptionString($reflectionClass, $typeName);
        return array(
            'description' => $eventDescription,
            'type'        => $eventType,
            'objectId'    => $this->getProperty('id'),
            'objectClass' => $reflectionClass->getName(),
            'objectType'  => $typeName,
            'metaData'    => $this->getAsSerializedString($changesMetaData)
        );
    }
    /**
     * @param DoctrineEntityEvent $event
     * @param string $eventName
     */
    private function initialize(DoctrineEntityEvent $event, $eventName)
    {
        $this->eventShortName = null;
        $this->propertiesFound = array();
        $this->eventName = $eventName;
        $this->event = $event;
        $this->entity = $event->getLifecycleEventArgs()->getEntity();
    }
    
    protected function getDescriptionString(\ReflectionClass $reflectionClass, $typeName)
    {
        $property = $this->getBestCandidatePropertyForIdentify($reflectionClass);
        $descriptionTemplate = '%s has been %s ';
        if ($property) {
            $descriptionTemplate .= sprintf(' with %s = "%s" ', $property, $this->getProperty($property));
        }
        return sprintf($descriptionTemplate,
            $typeName,
            $this->getEventShortName());
    }
    /**
     * @param $changesMetaData
     *
     * @return null|string
     */
    protected function getAsSerializedString($changesMetaData)
    {
        if (empty($changesMetaData)) {
            return NULL;
        } elseif (is_string($changesMetaData)) {
            return $changesMetaData;
        }
        return serialize($changesMetaData);
    }
}