CakePHP 4.x: How to access logged-in user info from within a custom Behavior? - identity

Question

I am trying to add a custom Behavior that is a clone of the default Timestamp. Mine is "Userstamp" adding the current user to audit-trail fields on all tables. At the point where Timestamp sets the field to "new FrozenTime($ts)", I want to set to "$identity->get('username')" or similar. I am having trouble reaching anything from Authentication/Authorization or Identity from within the Behavior.
I know that the information is there, somewhere. But what do I need to include in my Behavior class in order to retrieve it?
I found this link, but I don't see where to put the suggested code.
In my Table:
public function initialize(array $config): void
{
parent::initialize($config);
$this->setTable('users');
$this->setDisplayField('name');
$this->setPrimaryKey('id');
$this->addBehavior('Timestamp');
$this->addBehavior('Userstamp');
.
.
.
}
Cake's timestamp Behavior:
public function timestamp(?DateTimeInterface $ts = null, bool $refreshTimestamp = false): DateTimeInterface
{
if ($ts) {
if ($this->_config['refreshTimestamp']) {
$this->_config['refreshTimestamp'] = false;
}
$this->_ts = new FrozenTime($ts);
} elseif ($this->_ts === null || $refreshTimestamp) {
$this->_ts = new FrozenTime();
}
return $this->_ts;
}
My userstamp Behavior:
public function userstamp($userstamp = null, bool $refreshUserstamp = false)
{
// Variations of this do not work, the Property is not available in UserstampBehavior
// $currentUser = $this->Authentication
// ->getIdentity()
// ->getIdentifier();
$currentUser = 'abc'; <<<<<<<<<<<<< Hard-coded temporarily
if ($userstamp) {
if ($this->_config['refreshUserstamp']) {
$this->_config['refreshUserstamp'] = false;
}
$this->_userstamp = $currentUser;
} elseif ($this->_userstamp === null || $refreshUserstamp) {
$this->_userstamp = $currentUser;
}
return $this->_userstamp;
}

Answer 1

Your Auth-Informations lives also in the session.
So you can access Session-stuff in a table-class like this:
(new Session)->read('Auth')
And therefore you give this information from a table-class to your Behaviour like this:
$this->addBehavior('Userstamp', ['user_info'=>(new Session)->read('Auth')]);
Then you can access this information in your behaviour:
public function initialize(array $config){
$this->user_info = $config['user_info'];
}
public function myFunction(){
// do something with $this->user_info
}