mailjet-8.x-2.7/modules/mailjet_subscription/src/Form/MailjetSubscriptionLabelsForm.php

<?php

/**
 * @file
 * Contains \Drupal\mailjet_subscription\Form\MailjetSubcriptionLabelsForm.
 */

namespace Drupal\mailjet_subscription\Form;

use Drupal\Core\Form\ConfigFormBase;
use Drupal\Core\Form\FormStateInterface;

class MailjetSubscriptionLabelsForm extends ConfigFormBase
{

  /**
   * {@inheritdoc}
   */
    protected function getEditableConfigNames()
    {
        return [
        'mailjet_labels.adminsettings',
        ];
    }

  /**
   * {@inheritdoc}
   */
    public function getFormId()
    {
        return 'mailjet_labels_form';
    }

  /**
   * {@inheritdoc}
   */
    public function buildForm(array $form, FormStateInterface $form_state)
    {

        if (isset($_GET['entity-id']) && !empty($_GET['entity-id'])) {
            $form_id = $_GET['entity-id'];
            $signup_form = mailjet_subscription_load($form_id);
        }

        $form['entity_id'] = [
        '#type' => 'hidden',
        '#default_value' => $form_id,
        ];

        $form['subscribe_field_email'] = [
        '#type' => 'textfield',
        '#title' => t('Email'),
        '#default_value' => $signup_form->email_label ?? '',
        '#required' => TRUE,
        ];

        $fields = explode(',', $signup_form->fields_mailjet);
        $labels_fields = explode(',', $signup_form->labels_fields ?? '');
        $counter = 0;

        if (!(empty($fields[0]))) {
            foreach ($fields as $field) {
                $form['singup-' . $field] = [
                '#type' => 'textfield',
                '#title' => t('Label of \'machine name\' field: ' . $field),
                '#description' => '',
                '#required' => TRUE,
                '#default_value' => $labels_fields[$counter] ?? '',
                ];

                $counter++;
            }
        }

        $form['actions']['#type'] = 'actions';

        $form['actions']['submit'] = [
        '#type' => 'submit',
        '#value' => $this->t('Save'),
        '#button_type' => 'primary',
        ];

        return $form;
    }

  /**
   * {@inheritdoc}
   */
    public function validateForm(array &$form, FormStateInterface $form_state)
    {
    }

  /**
   * {@inheritdoc}
   */
    public function submitForm(array &$form, FormStateInterface $form_state)
    {
        $entity = mailjet_subscription_load($form_state->getValue('entity_id'));
        $entity->set('email_label', $form_state->getValue('subscribe_field_email'));

        $fields = explode(',', $entity->fields_mailjet);
        $fields_label = [];

        if (!(empty($fields[0]))) {
            foreach ($fields as $field) {
                $label = !empty($form_state->getValue('singup-' . $field)) ? $form_state->getValue('singup-' . $field) : '';
                array_push($fields_label, $label);
            }

            $entity->set('labels_fields', implode(',', $fields_label));
        }

        $status = $entity->save();

        if ($status == SAVED_UPDATED) {
            \Drupal::messenger()->addMessage(t('Subscription Form Labels have been updated.'));
        } else {
            \Drupal::messenger()->addMessage(t('Subscription Form Labels haven\'t been updated.'));
        }
    }

}