edlp_d8/web/modules/custom/edlp_ajax/edlp_ajax.module

<?php

# @Author: Bachir Soussi Chiadmi <bach>
# @Email:  bachir@figureslibres.io
# @Filename: edlp_ajax.module
# @License: GPL-V3

use Drupal\Core\Url;


/**
 * Implements hook_page_attachments().
 * @param array $attachments
 */
function edlp_ajax_page_attachments(array &$attachments) {
  // provied info about available urls needed for ajax purpose
  $url = Url::fromRoute('edlp_ajax.entityjson');
  $attachments['#attached']['drupalSettings']['edlp_ajax']['entityjson_path'] = $url->getInternalPath();
  $url = Url::fromRoute('edlp_ajax.blocksjson');
  $attachments['#attached']['drupalSettings']['edlp_ajax']['blocksjson_path'] = $url->getInternalPath();

  // provied infos about current entity (node or taxonomy term) and audio files
  $current_path = \Drupal::service('path.current')->getPath();
  $current_language = \Drupal::languageManager()->getCurrentLanguage()->getId();
  $is_front = \Drupal::service('path.matcher')->isFrontPage();

  $entity_type = null;
  $entity_bundle = null;
  $entity_id = null;
  $audio_url = null;
  foreach (['node', 'taxonomy_term'] as $type) {
    $entity = \Drupal::routeMatch()->getParameter($type);
    if($entity){
      $entity_type = $type;
      $entity_bundle = $entity->bundle();
      $entity_id = $entity->id();
      if($entity_bundle == 'enregistrement'){
        $field_son_values = $entity->get('field_son')->getValue();
        $audio_fid = count($field_son_values) ? $field_son_values[0]['target_id'] : null;
        if($audio_fid){
          $audio_file = \Drupal\file\Entity\File::load($audio_fid);
          $son_uri = $audio_file->getFileUri();
          $audio_url = file_create_url($son_uri);
        }
      }
      break;
    }
  }

  // do not redirect if not node, term, or custom routing
  // FIXME: check with routes instead of path as path can change !!!
  $redirect = false;
  if(preg_match('/^\/?node\/\d+/', $current_path)
    || preg_match('/^\/?taxonomy\/term\/\d+/', $current_path)
    || preg_match('/^\/?productions/', $current_path)
    || preg_match('/^\/?agenda/', $current_path)
    || preg_match('/^\/?studio/', $current_path)
    || preg_match('/^\/?search/', $current_path)
    || preg_match('/^\/?docsindex/', $current_path)
    || preg_match('/^\/?lastdocs/', $current_path)
    || preg_match('/^\/?articles/', $current_path)){
      $redirect = true;
    }

  $site_name = \Drupal::config('system.site')->get('name');

  $js_str = "var edlp = {\n
    sys_path:'".$current_path."',\n
    is_front:".($is_front ? 'true':'false').",\n
    redirect:".($redirect ? 'true':'false').",\n
    lang_code:'".$current_language."',\n
    entity_type:'".$entity_type."',\n
    entity_bundle:'".$entity_bundle."',\n
    entity_id:'".$entity_id."',\n
    audio_url:'".$audio_url."',\n
    site_name:'".$site_name."',\n
  };";

  $attachments['#attached']['html_head'][] = [
    [
      '#type' => 'html_tag',
      '#tag' => 'script',
      '#value' => $js_str,
      '#weight' => -999,
      '#group' => 'edlp'
    ],
    // A key, to make it possible to recognize this HTML  element when altering.
    'edlp',
  ];
}


/**
 * Implements hook_theme().
 */
function edlp_ajax_theme($existing, $type, $theme, $path) {
  // @see https://www.drupal.org/docs/8/theming/twig/create-custom-twig-templates-from-custom-module
  return array(
    'edlp_ajax' => array(
      'file' => 'includes/edlp_ajax.inc',
      'variables' => array(
        'entity_type' => null,
        'bundle' => null,
        'entity' => null,
        'view_mode' => 'default',
        'aside' => array(),
      ),
    ),
  );
}

/**
 * Implements hook_theme_suggestions_HOOK().
 */
function edlp_ajax_theme_suggestions_edlp_ajax(array $vars) {
  // dpm($vars);
  $suggestions = [];
  // $node = $variables['elements']['#node'];
  $sanitized_view_mode = strtr($vars['view_mode'], '.', '_');
  // $entity = $vars['entity'];
  //
  $suggestions[] = 'edlp_ajax__' . $vars['entity_type'];
  $suggestions[] = 'edlp_ajax__' . $vars['entity_type'] . '__' . $sanitized_view_mode;
  // $suggestions[] = 'node__' . $node->bundle() . '__' . $sanitized_view_mode;
  $suggestions[] = 'edlp_ajax__' . $vars['entity_type'] . '__' . $vars['entity']->id();
  $suggestions[] = 'edlp_ajax__' . $vars['entity_type'] . '__' . $vars['entity']->id() . '__' . $sanitized_view_mode;

  $suggestions[] = 'edlp_ajax__' . $vars['entity_type'] . '__' . $vars['bundle'];
  $suggestions[] = 'edlp_ajax__' . $vars['entity_type'] . '__' . $vars['bundle'] . '__' . $sanitized_view_mode;

  return $suggestions;
}