niobi-8.x-2.0-alpha4/modules/niobi_form/modules/niobi_app/src/Plugin/Field/FieldType/NiobiAppDecisionType.php

<?php

namespace Drupal\niobi_app\Plugin\Field\FieldType;

use Drupal\Component\Utility\Random;
use Drupal\Core\Field\FieldDefinitionInterface;
use Drupal\Core\Field\FieldItemBase;
use Drupal\Core\Field\FieldStorageDefinitionInterface;
use Drupal\Core\Form\FormStateInterface;
use Drupal\Core\StringTranslation\TranslatableMarkup;
use Drupal\Core\TypedData\DataDefinition;

/**
 * Plugin implementation of the 'niobi_app_decision_type' field type.
 *
 * @FieldType(
 *   id = "niobi_app_decision_type",
 *   label = @Translation("Niobi Application Decision type"),
 *   category = @Translation("Niobi Research Center"),
 *   description = @Translation("Application decisions which may be selected."),
 *   default_widget = "niobi_app_decision_widget",
 *   default_formatter = "niobi_app_decision_formatter"
 * )
 */
class NiobiAppDecisionType extends FieldItemBase {

  /**
   * {@inheritdoc}
   */
  public static function propertyDefinitions(FieldStorageDefinitionInterface $field_definition) {
    $properties['value'] = DataDefinition::create('string')
      ->setLabel(t('Text value'))
      ->addConstraint('Length', ['max' => 255])
      ->setRequired(TRUE);

    return $properties;
  }

  /**
   * {@inheritdoc}
   */
  public static function schema(FieldStorageDefinitionInterface $field_definition) {
    return [
      'columns' => [
        'value' => [
          'type' => 'varchar',
          'length' => 255,
        ],
      ],
      'indexes' => [
        'value' => ['value'],
      ],
    ];
  }

  /**
   * {@inheritdoc}
   */
  public function isEmpty() {
    $value = $this->get('value')->getValue();
    return $value === NULL || $value === '';
  }

  /**
   * {@inheritdoc}
   */
  protected static function castAllowedValue($value) {
    return (string) $value;
  }

}