ArgumentValidatorTest.php

<?php

namespace Drupal\views_test_data\Plugin\views\argument_validator;

use Drupal\views\Plugin\views\argument_validator\ArgumentValidatorPluginBase;

/**
 * Defines a argument validator test plugin.
 *
 * @ViewsArgumentValidator(
 *   id = "argument_validator_test",
 *   title = @Translation("Argument validator test")
 * )
 */
class ArgumentValidatorTest extends ArgumentValidatorPluginBase {
    
    /**
     * {@inheritdoc}
     */
    public function calculateDependencies() {
        return [
            'content' => [
                'ArgumentValidatorTest',
            ],
        ];
    }
    
    /**
     * {@inheritdoc}
     */
    protected function defineOptions() {
        $options = parent::defineOptions();
        $options['test_value'] = [
            'default' => '',
        ];
        return $options;
    }
    
    /**
     * {@inheritdoc}
     */
    public function validateArgument($arg) {
        if ($arg === 'this value should be replaced') {
            // Set the argument to a numeric value so this is valid on PostgeSQL for
            // numeric fields.
            $this->argument->argument = '1';
            return TRUE;
        }
        return $arg == $this->options['test_value'];
    }

}