drupal-reha/web/themes/custom/reha/reha.theme

<?php


use Drupal\Core\Url;
use Drupal\Core\Link;
use Drupal\Core\Render\Markup;


/**
 * @file
 * Functions to support theming in the reha theme.
 */

/**
 * Implements hook_preprocess_HOOK() for html.html.twig.
 */
function reha_preprocess_html(&$variables) {
    $node = \Drupal::routeMatch()->getParameter('node');
    if ($node){
      $variables['attributes']['class'][] = 'node-type-' . $node->bundle();
      $variables['attributes']['class'][] = 'node-id-' . $node->id();
    }
}

/**
 * Implements hook_preprocess_HOOK() for page.html.twig.
 */
function reha_preprocess_page(&$variables) {

}

/**
 * Implements hook_preprocess_HOOK() for node.html.twig.
 */
function reha_preprocess_node(&$variables) {
    $node = &$variables['node'];
    $variables['attributes']['class'][] = 'node-type-' . $node->gettype();
}




/**
 * Prepares variables for block templates.
 *
 * Default template: block.html.twig.
 *
 * Prepares the values passed to the theme_block function to be passed
 * into a pluggable template engine. Uses block properties to generate a
 * series of template file suggestions. If none are found, the default
 * block.html.twig is used.
 *
 * Most themes use their own copy of block.html.twig. The default is located
 * inside "core/modules/block/templates/block.html.twig". Look in there for the
 * full list of available variables.
 *
 * @param array $variables
 *   An associative array containing:
 *   - elements: An associative array containing the properties of the element.
 *     Properties used: #block, #configuration, #children, #plugin_id.
 */

//https://www.hashbangcode.com/article/drupal-9-programmatically-creating-and-using-urls-and-links

function reha_preprocess_block(&$variables) {
  if ($variables['plugin_id'] === "user_login_block") {
    $url = new Url('user.register', [], ['query' => ['destination' => '/node/add/operation']]);
    $link = new Link('proposer une opération', $url);
    $variables['content']['reha'] = array(
      '#theme' => 'item_list',
      '#items' => [
        'operations' => [
          "add_operation" => $link->toRenderable(),
          "description" => [
            "#markup" => Markup::create("<p>Créer un compte pour charger une opération</p>")
          ]
        ]
      ]
    );
  }
  if ($variables['plugin_id'] === "page_title_block") {
    if (\Drupal::routeMatch()->getRouteName() === 'node.add') {
      $node_type = \Drupal::routeMatch()->getParameter('node_type');
      if ($node_type->id() === 'operation') {
        $variables['content'] = [
          '#type' => 'page_title',
          '#title' => 'Proposer une opération'
        ];
      }
    }
  }

}