ExpressionFormInterface.php

<?php

namespace Drupal\rules\Form\Expression;

use Drupal\Core\Form\FormStateInterface;

/**
 * Defines methods for expression forms.
 */
interface ExpressionFormInterface {
    
    /**
     * Adds elements specific to the expression to the form.
     *
     * @param array $form
     *   The form array.
     * @param \Drupal\Core\Form\FormStateInterface $form_state
     *   The current form state.
     */
    public function form(array $form, FormStateInterface $form_state);
    
    /**
     * Form validation callback to validate expression elements.
     *
     * @param array $form
     *   The form array.
     * @param \Drupal\Core\Form\FormStateInterface $form_state
     *   The current form state.
     */
    public function validateForm(array $form, FormStateInterface $form_state);
    
    /**
     * Form submission callback to save changes for the expression.
     *
     * @param array $form
     *   The form array.
     * @param \Drupal\Core\Form\FormStateInterface $form_state
     *   The current form state.
     */
    public function submitForm(array &$form, FormStateInterface $form_state);

}