custom_add_content-8.x-1.2/custom_add_content.install

<?php

/**
 * @file
 * Custom add content install.
 */

use Drupal\menu_link_content\Entity\MenuLinkContent;
use Drupal\node\Entity\NodeType;

/**
 * Implements hook_install().
 */
function custom_add_content_install() {

  // Module's menu creation.
  Drupal::entityTypeManager()
    ->getStorage('menu')
    ->create([
      'id' => 'custom-add-content-page',
      'label' => 'Custom add content page',
      'description' => 'Content creation links',
    ])
    ->save();

  // Menu item creation for each content type.
  $ct_list = NodeType::loadMultiple();
  foreach ($ct_list as $ct_machine_name => $obj) {
    $item = MenuLinkContent::create([
      'title' => $obj->get('name'),
      'link' => ['uri' => 'internal:/node/add/' . $ct_machine_name],
      'menu_name' => 'custom-add-content-page',
      'expanded' => TRUE,
    ]);
    $item->save();
  }

  // This module must execute after core's node module and i18n module.
  module_set_weight('custom_add_content', 15);
}

/**
 * Implements hook_uninstall().
 */
function custom_add_content_uninstall() {

  // Module's menu deletion.
  Drupal::entityTypeManager()
    ->getStorage('menu')
    ->load('custom-add-content-page')->delete();
}