reinstalled all contribs with composer

need to run :
drush ev 'drupal_flush_all_caches();'
drush cr
and restart nginx and php-fpm before loading the website

web/modules/custom/edlp_agenda/edlp_agenda.info.yml

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+# @Author: Bachir Soussi Chiadmi <bach>
+# @Date:   13-12-2017
+# @Email:  bachir@figureslibres.io
+# @Filename: edlp_corpus.routing.yml
+# @Last modified by:   bach
+# @Last modified time: 20-12-2017
+# @License: GPL-V3
+
+
+name: Edlp Agenda
+type: module
+description: Manage agenda for edlp d8.
+core: 8.x
+package: Edlp
+# dependencies:
+#   - migrate_drupal
+#   - migrate_plus
+#   - migrate_tools

web/modules/custom/edlp_agenda/edlp_agenda.module

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+<?php
+
+# @Author: Bachir Soussi Chiadmi <bach>
+# @Date:   13-12-2017
+# @Email:  bachir@figureslibres.io
+# @Filename: edlp_corpus.routing.yml
+# @Last modified by:   bach
+# @Last modified time: 20-12-2017
+# @License: GPL-V3
+
+/**
+ * Implements hook_theme().
+ */
+function edlp_agenda_theme($existing, $type, $theme, $path) {
+  // @see https://www.drupal.org/docs/8/theming/twig/create-custom-twig-templates-from-custom-module
+  return array(
+    'edlp_agenda' => array(
+      // 'render element' => '',
+      'file' => 'includes/edlp_agenda.inc',
+      'variables' => array(
+        'next_event_node' => NULL,
+        'coming_events_nodes' => NULL,
+        'past_events_nodes' => NULL
+      ),
+    ),
+  );
+}

web/modules/custom/edlp_agenda/edlp_agenda.routing.yml

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+# @Author: Bachir Soussi Chiadmi <bach>
+# @Date:   13-12-2017
+# @Email:  bachir@figureslibres.io
+# @Filename: edlp_corpus.routing.yml
+# @Last modified by:   bach
+# @Last modified time: 20-12-2017
+# @License: GPL-V3
+
+edlp_agenda.agenda:
+  path: '/agenda'
+  defaults:
+    _controller: '\Drupal\edlp_agenda\Controller\AgendaController::agenda'
+    _title: 'Agenda'
+  requirements:
+    _permission: 'access content'
+
+edlp_agenda.agendaajax:
+  path: '/agenda/ajax'
+  defaults:
+    _controller: '\Drupal\edlp_agenda\Controller\AgendaController::agendajson'
+    _title: 'Agenda'
+  requirements:
+    _permission: 'access content'

web/modules/custom/edlp_agenda/includes/edlp_agenda.inc

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+<?php
+
+// use Drupal\Core\Url;
+
+function template_preprocess_edlp_agenda(&$vars){
+  // dpm($vars);
+  /*
+  @see https://www.drupal8.ovh/index.php/en/tutoriels/339/render-a-node-or-an-entity
+  */
+  $view_builder = \Drupal::entityTypeManager()->getViewBuilder('node');
+
+  // if(isset($vars['next_event_node'])){
+  //   $vars['next_event'] = array(
+  //     "#markup"=>"<h3>Prochaine Date</h3>",
+  //     "event"=>$view_builder->view($vars['next_event_node'], 'default')
+  //   );
+  // }
+
+  if(count($vars['coming_events_nodes'])){
+    $future_list = array (
+      '#theme' => 'item_list',
+      '#items' => [],
+    );
+    foreach($vars['coming_events_nodes'] as $node){
+      $future_list['#items'][] = $view_builder->view($node, 'teaser');
+    }
+
+    $vars['coming_events'] = array(
+      "#type"=>"container",
+      "#attributes"=>array(
+        "class"=>['future-events']
+      ),
+      "#markup"=>"<h3>".t("Upcoming Events")."</h3>",
+      "future_events"=>$future_list
+    );
+  }
+
+
+  $past_list = array (
+    '#theme' => 'item_list',
+    '#items' => [],
+  );
+  foreach($vars['past_events_nodes'] as $node){
+    $past_list['#items'][] = $view_builder->view($node, 'teaser');
+  }
+
+  $vars['past_events'] = array(
+    "#type"=>"container",
+    "#attributes"=>array(
+      "class"=>['past-events']
+    ),
+    "#markup"=>"<h3>".t("Past Events")."</h3>",
+    "past_events"=>$past_list
+  );
+
+  // return array(
+  //   "#type" => "container",
+  //   "#attributes"=>array(
+  //     "id"=>['agenda']
+  //   ),
+  //   "future_past"=>array(
+  //     "#type"=>"container",
+  //     "#attributes"=>array(
+  //       "class"=>['future-past-events', 'column', 'os-scroll']
+  //     ),
+  //     "future"=>,
+  //     "past"=>
+  //   )
+  // );
+
+}

web/modules/custom/edlp_agenda/src/Controller/AgendaController.php

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+<?php
+
+namespace Drupal\edlp_agenda\Controller;
+
+use Drupal\Core\Controller\ControllerBase;
+use Drupal\Core\Datetime\DrupalDateTime;
+use Drupal\Core\Url;
+use Drupal\Core\Language\LanguageInterface;
+// use Symfony\Component\HttpFoundation\JsonResponse;
+use Drupal\Core\Cache\CacheableJsonResponse;
+use Drupal\Core\Cache\CacheableMetadata;
+use Drupal\core\render\RenderContext;
+
+class AgendaController extends ControllerBase {
+
+
+  private function query() {
+    // @see https://www.webomelette.com/query-entities-using-dates-drupal-8
+
+    $now = new DrupalDateTime('now');
+    $now->setTimezone(new \DateTimeZone(DATETIME_STORAGE_TIMEZONE));
+
+    $query = \Drupal::entityQuery('node')
+      ->condition('status', 1)
+      ->condition('type', 'evenement')
+      ->condition('field_date', $now->format(DATETIME_DATETIME_STORAGE_FORMAT), '>=')
+      ->sort('field_date');
+
+    $this->future_nids = $query->execute();
+    $this->future_nodes = entity_load_multiple('node', $this->future_nids);
+
+    // $this->next_event_node = array_shift($this->future_nodes);
+
+    $query = \Drupal::entityQuery('node')
+      ->condition('status', 1)
+      ->condition('type', 'evenement')
+      ->condition('field_date', $now->format(DATETIME_DATETIME_STORAGE_FORMAT), '<')
+      ->sort('field_date', 'DESC');
+
+    $this->past_nids = $query->execute();
+    $this->past_nodes = entity_load_multiple('node', $this->past_nids);
+  }
+
+  private function toRenderable(){
+    $this->query();
+    // dpm($this->next_event_node);
+
+    return array(
+      "#theme"=>'edlp_agenda',
+      // '#next_event_node' => $this->next_event_node,
+      "#coming_events_nodes" => $this->future_nodes,
+      "#past_events_nodes" => $this->past_nodes,
+    );
+
+  }
+
+  /**
+   * Display agenda as a page.
+   *
+   * @return renderable array
+   */
+  public function agenda() {
+    return $this->toRenderable();
+  }
+
+  /**
+   * Get agenda data as json through ajax.
+   *
+   * @return json
+   */
+  public function agendajson() {
+
+    $renderable = $this->toRenderable();
+    // $rendered = render($renderable);
+    // We can't render directly the entity as it throw an exception with cachable data
+    //http://blog.dcycle.com/blog/2018-01-24/caching-drupal-8-rest-resource/#the-dreaded-leaked-metadata-error
+    $rendered = \Drupal::service('renderer')->executeInRenderContext(new RenderContext(), function () use ($renderable) {
+      return render($renderable);
+    });
+
+    $data = [
+      'rendered'=> $rendered,
+      'title'=>'Agenda',
+    ];
+
+    // translations links
+    // use Drupal\Core\Url;
+    // use Drupal\Core\Language\LanguageInterface;
+    $route_name = 'edlp_agenda.agenda';
+    $links = \Drupal::languageManager()->getLanguageSwitchLinks(LanguageInterface::TYPE_URL, Url::fromRoute($route_name));
+    if (isset($links->links)) {
+      $translations_build = [
+        '#theme' => 'links__language_block',
+        '#links' => $links->links,
+        '#attributes' => ['class' => ["language-switcher-{$links->method_id}",],],
+        '#set_active_class' => TRUE,
+      ];
+      $translations_rendered = \Drupal::service('renderer')->executeInRenderContext(new RenderContext(), function () use ($translations_build) {return render($translations_build);});
+
+      $data['translations_links'] = $translations_rendered;
+    }
+
+    $data['#cache'] = [
+      'max-age' => \Drupal\Core\Cache\Cache::PERMANENT,
+      'tags' => ['edlp-agenda-cache'],
+      'contexts' => [
+        'languages:language_content'
+      ]
+    ];
+    // $response = new JsonResponse();
+    // $response->setData($data);
+    $response = new CacheableJsonResponse($data);
+    $response->addCacheableDependency(CacheableMetadata::createFromRenderArray($data));
+    $response->addCacheableDependency(CacheableMetadata::createFromRenderArray($renderable));
+
+    return $response;
+  }
+}

web/modules/custom/edlp_agenda/templates/edlp-agenda.html.twig

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+{# next_event #}
+{{ coming_events }}
+{{ past_events }}