wmsettings.module

<?php

use Drupal\Core\Access\AccessResult;
use Drupal\Core\Entity\EntityInterface;
use Drupal\Core\Entity\EntityTypeInterface;
use Drupal\wmsettings\Field\IndexableBaseFieldDefinition;

/**
 * Get the entity for a key.
 */
function wmsettings_get($key)
{
    return Drupal::service('wmsettings.settings')
        ->read($key);
}

/**
 * Implements hook_entity_base_field_info().
 *
 * More intel at https://www.drupal.org/node/1879542
 */
function wmsettings_entity_base_field_info(EntityTypeInterface $entity_type)
{
    $fields = [];

    // Attach a machine name field to our bundle.
    if ($entity_type->id() == 'settings') {
        $fields['wmsettings_key'] = IndexableBaseFieldDefinition::create('string')
            ->setLabel(t('Key'))
            ->setDescription(t('The key machine name of this config'))
            ->setRequired(true)
            ->setReadOnly(true)
            ->setDisplayConfigurable('view', false)
            ->setDisplayConfigurable('form', true)
            ->setDisplayOptions('form', [
                'type' => 'string_textfield',
                'region' => 'hidden',
            ])
            ->addIndex('value');
    }

    return $fields;
}

function wmsettings_entity_insert(EntityInterface $entity)
{
    \Drupal::getContainer()
        ->get('wmsettings.settings_subscriber')
        ->dispatchCacheTags($entity);
}

function wmsettings_entity_update(EntityInterface $entity)
{
    \Drupal::getContainer()
        ->get('wmsettings.settings_subscriber')
        ->dispatchCacheTags($entity);
}

/**
 * Disable the form action if they do not have the permission.
 *
 * @param $form
 * @param $form_state
 * @param $form_id
 */
function wmsettings_form_alter(&$form, $form_state, $form_id)
{
    if (strpos($form_id, 'settings_') === 0) {
        // check the permission for delete.
        /** @var \Drupal\user\Entity\User $user */
        $user = \Drupal::currentUser();
        if (!$user->hasPermission('delete wmsettings group')) {
            unset($form['actions']['delete']);
        }

        // Since the entity is NOT in the form we load it via the route.
        if ($entity = \Drupal::routeMatch()->getParameter('settings')) {
            $form['#title'] = t(
                'Edit setting %settingName',
                ['%settingName' => $entity->type->entity->label()]
            );
        }
    }
}

/**
 * Prevent delete on settings if you don't have the proper rights.
 *
 * @param \Drupal\Core\Entity\EntityStorageInterface $entity
 * @param string $operation
 * @param \Drupal\Core\Session\AccountInterface $user
 * @return AccessResult
 */
function wmsettings_settings_access($entity, $operation, $user)
{
    // Forbid.
    if ($operation == 'delete') {
        return AccessResult::allowedIfHasPermission($user, 'delete wmsettings group');
    }

    // Other wise...
    return AccessResult::neutral();
}