tenant.module

<?php

/**
 * @file
 * Primary module hooks for Tenant module.
 *
 * @DCG
 * This file is no longer required in Drupal 8.
 * @see https://www.drupal.org/node/2217931
 */

/**
 * Implements hook_entity_base_field_info().
 */
function tenant_entity_base_field_info(\Drupal\Core\Entity\EntityTypeInterface $entity_type) {
  $fields = [];

  if ($entity_type->id() == 'user') {
    /** @var \Drupal\group\Entity\GroupType $group_type */
    if ($group_type = \Drupal::entityTypeManager()->getStorage('group_type')->load('tenant')) {
      $field_name = $group_type->id() . '_group_name';

      $fields[$field_name] = \Drupal\Core\Field\BaseFieldDefinition::create('string')
        ->setName($field_name)
        ->setLabel($group_type->label())
        ->setClass(\Drupal\tenant\Plugin\Field\FieldType\GroupNameItem::class)
        ->setComputed(TRUE)
        ->setDisplayConfigurable('view', TRUE)
        ->setDisplayOptions('view', ['type' => 'hidden']);
    }
  }

  return $fields;
}

/**
 * Implements hook_form_FORM_ID_alter().
 */
function tenant_form_system_site_information_settings_alter(&$form, \Drupal\Core\Form\FormStateInterface $form_state, $form_id) {
  // append hint for provided front page
  $form['front_page']['site_frontpage']['#description'] .= ' ';
  $form['front_page']['site_frontpage']['#description'] .= t('Specify "/tenant/front" to dispatch front page by group membership status');
}

/**
 * Implements hook_form_FORM_ID_alter().
 */
function tenant_form_user_login_form_alter(&$form, \Drupal\Core\Form\FormStateInterface $form_state, $form_id) {
  \Drupal::service('tenant.form_helper.user_login')->formAlter($form, $form_state);
}