taxonomy_unique.module in Taxonomy unique 8.2

File

taxonomy_unique.module

<?php

use Drupal\Core\Form\FormStateInterface;
use Drupal\Core\Entity\EntityTypeInterface;
define('TAXONOMY_UNIQUE_DEFAULT_MESSAGE', 'Term %term already exists in vocabulary %vocabulary.');

/**
 * Implements hook_form_FORM_ID_alter().
 */
function taxonomy_unique_form_taxonomy_vocabulary_form_alter(&$form, FormStateInterface $form_state, $form_id) {
  $form['unique_container'] = [
    '#type' => 'fieldset',
    '#title' => t('Taxonomy unique'),
    '#collapsible' => TRUE,
    '#collapsed' => TRUE,
  ];
  $unique_default_value = \Drupal::config('taxonomy_unique.settings')
    ->get($form_state
    ->getFormObject()
    ->getEntity()
    ->id());
  if (is_array($unique_default_value) || empty($unique_default_value)) {
    $unique_default_value = FALSE;
  }
  $form['unique_container']['unique'] = [
    '#type' => 'checkbox',
    '#title' => t('Terms should be unique.'),
    '#default_value' => $unique_default_value,
  ];
  $unique_message_default_value = \Drupal::config('taxonomy_unique.settings')
    ->get($form_state
    ->getFormObject()
    ->getEntity()
    ->id() . '_message');
  if (empty($unique_message_default_value)) {
    $unique_message_default_value = TAXONOMY_UNIQUE_DEFAULT_MESSAGE;
  }
  $form['unique_container']['unique_message'] = [
    '#type' => 'textfield',
    '#title' => t('Message to show if term already exists'),
    '#description' => t('Placeholders: %term and %vocabulary'),
    '#default_value' => $unique_message_default_value,
  ];
  $form['actions']['submit']['#submit'][] = 'taxonomy_unique_taxonomy_form_vocabulary_submit';
}

// Handler function on submit the form.
function taxonomy_unique_taxonomy_form_vocabulary_submit($form, FormStateInterface $form_state) {

  // Save custom fields to variables.
  \Drupal::configFactory()
    ->getEditable('taxonomy_unique.settings')
    ->set($form_state
    ->getFormObject()
    ->getEntity()
    ->id(), $form_state
    ->getValue('unique'))
    ->set($form_state
    ->getFormObject()
    ->getEntity()
    ->id() . '_message', $form_state
    ->getValue('unique_message'))
    ->save();
}

/**
 * Implements hook_entity_base_field_info_alter().
 */
function taxonomy_unique_entity_base_field_info_alter(&$fields, EntityTypeInterface $entityType) {
  if ($entityType
    ->id() == 'taxonomy_term') {
    if (!empty($fields['name'])) {
      $fields['name']
        ->addConstraint("taxonomy_unique");
    }
  }
}

Functions

Name	Description
taxonomy_unique_entity_base_field_info_alter	Implements hook_entity_base_field_info_alter().
taxonomy_unique_form_taxonomy_vocabulary_form_alter	Implements hook_form_FORM_ID_alter().
taxonomy_unique_taxonomy_form_vocabulary_submit

Constants

Name	Description
TAXONOMY_UNIQUE_DEFAULT_MESSAGE