get settings in validator - typo3 - typo3

Question

I have an extension with backend configuration options.I need to validate a phone number in AddAction and UpdateAction.I can configure the phone number format in backend (say us phone number/indian phone number etc).How can i get the settings in validator?
I have a custom validator to validate phone numbers.Here is my code
<?php
namespace vendor\Validation\Validator;
class UsphonenumberValidator extends \TYPO3\CMS\Extbase\Validation\Validator\AbstractValidator
{
protected $supportedOptions = array(
'pattern' => '/^([\(]{1}[0-9]{3}[\)]{1}[ ]{1}[0-9]{3}[\-]{1}[0-9]{4})$/'
);
public function isValid($property) {
$settings = $this->settings['phone'];
$pattern = $this->supportedOptions['pattern'];
$match = preg_match($pattern, $property);
if ($match >= 1) {
return TRUE;
} else {
$this->addError('Phone number you are entered is not valid.', 1451318887);
return FALSE;
}
}
}
$settings returns null

Answer 1

In cases where the extbase configuration of your extension isn't implemented by default you should retrieve it yourself by using the \TYPO3\CMS\Extbase\Configuration\ConfigurationManager.
Here is an example how you can obtain the settings of your extension:
<?php
namespace MyVendor\MyExtName\Something;
use TYPO3\CMS\Core\Utility\GeneralUtility;
use TYPO3\CMS\Extbase\Configuration\ConfigurationManager;
use TYPO3\CMS\Extbase\Configuration\ConfigurationManagerInterface;
use TYPO3\CMS\Extbase\Object\ObjectManager;
class Something {
/**
* #var string
*/
static protected $extensionName = 'MyExtName';
/**
* #var null|array
*/
protected $settings = NULL;
/**
* Gets the Settings
*
* #return array
*/
public function getSettings() {
if (is_null($this->settings)) {
$this->settings = [];
/* #var $objectManager \TYPO3\CMS\Extbase\Object\ObjectManager */
$objectManager = GeneralUtility::makeInstance(ObjectManager::class);
/* #var $configurationManager \TYPO3\CMS\Extbase\Configuration\ConfigurationManager */
$configurationManager = $objectManager->get(ConfigurationManager::class);
$this->settings = $configurationManager->getConfiguration(
ConfigurationManagerInterface::CONFIGURATION_TYPE_SETTINGS,
self::$extensionName
);
}
return $this->settings;
}
}
I recommend that you implement such functionality in general. So you could retrieve any configuration of any extension as a Service inside your extension or something similar to this.
Good luck!