cforge-2.0.x-dev/src/Plugin/Field/FieldWidget/ContactMeWidget.php

<?php

namespace Drupal\cforge\Plugin\Field\FieldWidget;

use \Drupal\cforge\Plugin\Field\FieldType\ContactMeItem;
use Drupal\Core\Field\FieldItemListInterface;
use Drupal\Core\Field\WidgetBase;
use Drupal\Core\Form\FormStateInterface;
use Drupal\Core\StringTranslation\TranslatableMarkup;

/**
 * Plugin implementation of the 'worth' widget.
 *
 * @FieldWidget(
 *   id = "cf_contactme",
 *   label = @Translation("Contact me"),
 *   field_types = {
 *     "cf_contactme"
 *   },
 *   multiple_values = false
 * )
 */
class ContactMeWidget extends WidgetBase {

  /**
   * Returns the form for a single field widget.
   *
   * @see \Drupal\Core\Field\WidgetInterface
   */
  public function formElement(FieldItemListInterface $items, $delta, array $element, array &$form, FormStateInterface $form_state) {
    $w = 0;
    $element = [
      '#title' => $this->t('Phone and social media handles.'),
      '#description' => $this->t("Main phone can be made private, other info is visisble to all site members."),
      '#type' => 'details',
      '#open' => $items->getFieldDefinition()->isRequired(),
      '#attributes'=> ['class' => ['channels']],
      '#attached' => ['library' => ['cforge/social_media_icons']]
    ];
    $this->availableChannels = array_filter($this->fieldDefinition->getSetting('channels')??[]);
    foreach (ContactMeItem::CHANNELS as $channel => $info) {
      if (in_array($channel, $this->availableChannels)) {
        $element[$channel] = [
          '#type' => 'textfield',
          '#title' => new TranslatableMarkup($info['title']),
          '#default_value' => $items->{$channel},
          '#weight' => $w++
        ];
        if (!empty($info['example'])) {
          $element[$channel]['#placeholder'] = $info['example'];
        }
        if (!empty($info['regex'])) {
          $element[$channel]['#pattern'] = $info['regex'];
        }
        if (!empty($info['prefix'])) {
          $element[$channel]['#field_prefix'] = $info['prefix'];
        }
        if (!empty($info['phoneid'])) {
          $this->dependsOnPhone($element, $channel);
        }
      }
    }

    $element['mob']['#required'] = $this->fieldDefinition->isRequired();

    return $element;
  }

  /**
   *
   * @param array $element
   * @param string $channel
   */
  function dependsOnPhone(array &$element, string $channel) : void {
    if (isset($element[$channel])) {
      $element[$channel]['#states'] = [
        'invisible' => [
          ':input[name="mob"]' => ['!value' => '']
        ]
      ];
      if (in_array('mob', $this->availableChannels)) {
        $element[$channel]['#options']['mob'] = $this->t('Mobile no.');
      }
      if (in_array('tel', $this->availableChannels)) {
        $element[$channel]['#options']['tel'] = t('Other phone no.');
      }
      if ($element[$channel]['#options']) {
        $element[$channel]['#type'] = 'select';
        unset($element[$channel]['#field_prefix']);
        $element[$channel]['#empty_option'] = $this->t('No');
      }
    }
  }

}