fac_gin.module

<?php

/**
 * @file
 * Contains fac_gin.module.
 */

use Drupal\Core\Routing\RouteMatchInterface;
use Drupal\Core\Url;

/**
 * Implements hook_help().
 */
function fac_gin_help($route_name, RouteMatchInterface $route_match) {
  switch ($route_name) {
    // Main module help for the fac_gin module.
    case 'help.page.fac_gin':
      $output = '';
      $output .= '<h3>' . t('About') . '</h3>';
      $output .= '<p>' . t('Factorial Gin integration') . '</p>';
      return $output;

    default:
  }
}

/**
 * Implements hook_implements_alter().
 */
function fac_gin_module_implements_alter(&$implementations, $hook) {
  if ($hook == 'form_alter') {

    // Move my_module_rdf_mapping() to the end of the list. module_implements()
    // iterates through $implementations with a foreach loop which PHP iterates
    // in the order that the items were added, so to move an item to the end of
    // the array, we remove it and then add it.
    $group = $implementations['fac_gin'];
    unset($implementations['fac_gin']);
    $implementations['fac_gin'] = $group;
  }
}

/**
 * Add gitlab link to gins login form.
 */
function fac_gin_form_alter(&$form, $form_state, $form_id) {
  if (strpos($form_id, 'user_login') !== FALSE) {
    $form['more-links']['gitlab'] = [
      '#type' => 'link',
      '#url' => Url::fromRoute('externalauth_gitlab.login_controller_login'),
      '#title' => t('Login with gitlab'),
      '#attributes' => [
        'class' => [
          'gitlab-button',
          'button',
          'button--secondary',
        ],
      ],
      '#weight' => '1',
    ];
  }
}

/**
 * Implements hook_theme_alter().
 */
function fac_gin_theme_registry_alter(&$theme) {
  foreach ([
    'page__user__login',
    'page__user__password',
    'page__user__register',
  ] as $key) {
    $theme[$key]['preprocess functions'][] = 'fac_gin_preprocess_ginlogin';
  }
}

/**
 * Use factorials logo as log for gin.
 */
function fac_gin_preprocess_ginlogin(&$variables) {
  $variables['icon_path'] = 'https://logo.factorial.io/color.svg';
  $variables['brand_image'] = 'https://bo.factorial.io/sites/default/files/styles/hero_image__large__2x/public/2020-04/_99B9048.jpg.webp?h=4fb65a68&itok=6g4BbMKZ';
}