<?php declare(strict_types=1);
 
 /*
- * This file is part of the Rapsys PackBundle package.
+ * This file is part of the Rapsys UserBundle package.
  *
  * (c) Raphaël Gertz <symfony@rapsys.eu>
  *
 
 namespace Rapsys\UserBundle\Entity;
 
+use Doctrine\Common\Collections\Collection;
 use Doctrine\Common\Collections\ArrayCollection;
+use Doctrine\ORM\Event\PreUpdateEventArgs;
 
 use Rapsys\UserBundle\Entity\User;
 
  */
 class Group {
        /**
-        * @var integer
+        * Primary key
         */
-       protected $id;
+       protected ?int $id = null;
 
        /**
-        * @var string
+        * Create datetime
         */
-       protected $title;
+       protected \DateTime $created;
 
        /**
-        * @var \DateTime
+        * Update datetime
         */
-       protected $created;
+       protected \DateTime $updated;
 
        /**
-        * @var \DateTime
+        * Users collection
         */
-       protected $updated;
-
-       /**
-        * @var ArrayCollection
-        */
-       protected $users;
+       protected Collection $users;
 
        /**
         * Constructor
         *
         * @param string $title The group name
         */
-       public function __construct(string $title) {
-               $this->title = (string) $title;
+       public function __construct(protected string $title) {
+               //Set defaults
+               $this->created = new \DateTime('now');
+               $this->updated = new \DateTime('now');
+
+               //Set collections
                $this->users = new ArrayCollection();
        }
 
         *
         * @return integer
         */
-       public function getId(): int {
+       public function getId(): ?int {
                return $this->id;
        }
 
         *
         * @param string $title The group name
         *
-        * @return User
+        * @return Group
         */
-       public function setTitle(string $title) {
+       public function setTitle(string $title): Group {
                $this->title = $title;
 
                return $this;
         *
         * @return string
         */
-       public function getTitle(): ?string {
+       public function getTitle(): string {
                return $this->title;
        }
 
         *
         * @param \DateTime $created
         *
-        * @return User
+        * @return Group
         */
-       public function setCreated(\DateTime $created) {
+       public function setCreated(\DateTime $created): Group {
                $this->created = $created;
 
                return $this;
         *
         * @param \DateTime $updated
         *
-        * @return User
+        * @return Group
         */
-       public function setUpdated(\DateTime $updated) {
+       public function setUpdated(\DateTime $updated): Group {
                $this->updated = $updated;
 
                return $this;
                return $this->users;
        }
 
+       /**
+        * {@inheritdoc}
+        */
+       public function preUpdate(PreUpdateEventArgs $eventArgs) {
+               //Check that we have a group instance
+               if (($user = $eventArgs->getObject()) instanceof Group) {
+                       //Set updated value
+                       $user->setUpdated(new \DateTime('now'));
+               }
+       }
+
        /**
         * Returns a string representation of the group
         *
         * @return string
         */
        public function getRole(): string {
+               //XXX: $prefix = 'ROLE_' set in Role*Voter classes
                return 'ROLE_'.strtoupper($this->title);
        }
 }