So, I am watching some TotalBiscuit’s E3 Snarkathon VR Killing Floor… whatever
The idea, consoles have solved the moving by having 2 sticks on the controller (I hope am right about that), so lets have 2 sticks on VR, wait this is bullshit, you will say?
Well may be, we already have the right stick by moving your head, the only question is how to make the left stick?
Do it like:
1. Make the chair you are sitting on detect movement, the way to image it like you are sitting on the left controller stick, which will move you through your experience by bending the chair in the 4 directions. YOU better add sensitivity calibration all right?
2. May be a cheaper way, using your right leg to move forward, backward, left leg moving left and right or using just one leg doing all the movement. This will allow me do lay on my couch, niceee.
I don’t have third solution, but think of the controller sticks when trying to solve this problem.
In this article I will show a simple way to log every change to doctrine 2 entity.
This one will not be copy / paste. Just check out the code and help yourself.
1. Create event service
/**
* @developer Ivan Gospodinow
*/
namespace Application\Service;
use Application\Entity\DbLogEntity;
use Application\Entity\AbstractEntity;
use Doctrine\Common\Persistence\Event\LifecycleEventArgs;
use \DateTime;
class DoctrineLogChangesService
{
/**
* Hold the changes
* @var type
*/
protected static $rows = [];
protected $sm;
protected $disabled = [
//'Application\Entity\UserEntity',
];
public function __construct($sm)
{
$this->sm = $sm;
$sm->get(‘Application’)
->getEventManager()
->attach(‘finish ’, [$this, 'flush']);
}
public function flush()
{
$orm = $this->sm->get(‘doctrine.entitymanager.orm_default’);
foreach (self::$rows as $row) {
$orm->persist($row);
}
if (!empty(self::$rows)) {
$orm->flush();
}
}
public function getUnitOfWork()
{
return $this->sm->get(‘doctrine.entitymanager.orm_default’)->getUnitOfWork();
}
public function getEntityTableName(LifecycleEventArgs $args)
{
$meta = $args->getObjectManager()->getClassMetadata(get_class($args->getObject()));
return $meta->table['name'];
}
public function getEntityFields(LifecycleEventArgs $args)
{
$meta = $args->getObjectManager()->getClassMetadata(get_class($args->getObject()));
$fields = [];
foreach ($meta->fieldMappings as $field) {
$fields[$field['fieldName']] = $field['columnName'];
}
foreach ($meta->associationMappings as $field) {
if (isset($field['sourceToTargetKeyColumns'])) {
$fields[$field['fieldName']] = key($field['sourceToTargetKeyColumns']);
}
}
return $fields;
}
/**
* Adds all initial fields
* @param LifecycleEventArgs $args
* @return type
*/
public function postPersist(LifecycleEventArgs $args)
{
$entity = $args->getObject();
if (in_array(get_class($entity), $this->disabled)) {
return;
}
$tableName = $this->getEntityTableName($args);
$fields = $this->getEntityFields($args);
foreach ($fields as $field => $column) {
$value = call_user_func_array([$entity, 'get' . ucfirst($field)], []);
$row = [
'user' => $this->sm->get('User')->getId(),
'table' => $tableName,
'pk' => $entity->getId(),
'column' => $column,
'oldValue' => null,
'newValue' => $value instanceof AbstractEntity ? $value->getId() : $value
];
$log = new DbLogEntity();
$log->exchangeArray($row);
self::$rows[] = $log;
}
}
/**
* Add only new changes
* @param LifecycleEventArgs $args
* @return type
*/
public function preUpdate(LifecycleEventArgs $args)
{
$entity = $args->getObject();
if (in_array(get_class($entity), $this->disabled) || !$entity->canUseLifecycleEvents()) {
return;
}
$tableName = $this->getEntityTableName($args);
$fields = $this->getEntityFields($args);
$set = $this->getUnitOfWork()->getEntityChangeSet($entity);
foreach ($set as $property => $changes) {
$oldValue = $changes[0];
$newValue = $changes[1];
if ($changes[0] instanceof AbstractEntity || $changes[1] instanceof AbstractEntity) {
if ($changes[0] instanceof AbstractEntity) {
$oldValue = $changes[0]->getId();
}
if ($changes[1] instanceof AbstractEntity) {
$newValue = $changes[1]->getId();
}
}
if ($oldValue == $newValue) {
continue;
}
$row = [
‘user’ => $this->sm->get(‘User’)->getId(),
‘ table’ => $tableName,
‘ pk’ => $entity->getId(),
‘ column’ => $fields[$property],
‘ oldValue’ => $this->getStringValue($oldValue),
‘ newValue’ => $this->getStringValue($newValue)
];
$log = new DbLogEntity();
$log->exchangeArray($row);
self::$rows[] = $log;
}
}
public function getStringValue($value)
{
if (is_scalar($value)) {
return $value;
}
if ($value instanceof DateTime) {
return $value->format('Y-m-d H:i:s');
} elseif (is_array($value)) {
return serialize($value);
}
return $value;
}
}
2. Add the event service to Doctrine 2
/**
* @developer Ivan Gospodinow
*/
namespace Application;
use Zend\Mvc\MvcEvent;
class Module
{
public function onBootstrap(MvcEvent $e)
{
$application = $e->getApplication();
$sm = $application->getServiceManager();
$doctrineEntityManager = $sm->get('doctrine.entitymanager.orm_default');
$doctrineEventManager = $doctrineEntityManager->getEventManager();
$doctrineEventManager->addEventListener(
[
\Doctrine\ORM\Events::postPersist,
\Doctrine\ORM\Events::preUpdate,
],
new Service\DoctrineLogChangesService($sm)
);
}
}
