Permissions.php

1. 9.x drupal/core/modules/user/lib/Drupal/user/Plugin/views/field/Permissions.php
2. 9.x drupal/core/modules/user/lib/Drupal/user/Plugin/views/filter/Permissions.php

<?php

/**
 * @file
 * Definition of Drupal\user\Plugin\views\field\Permissions.
 */
namespace Drupal\user\Plugin\views\field;

use Drupal\Core\Annotation\Plugin;
use Drupal\views\ViewExecutable;
use Drupal\views\Plugin\views\field\PrerenderList;

/**
 * Field handler to provide a list of permissions.
 *
 * @ingroup views_field_handlers
 *
 * @Plugin(
 *   id = "user_permissions",
 *   module = "user"
 * )
 */
class Permissions extends PrerenderList {

  /**
   * Overrides Drupal\views\Plugin\views\field\FieldPluginBase::init().
   */
  public function init(ViewExecutable $view, &$options) {
    parent::init($view, $options);
    $this->additional_fields['uid'] = array(
      'table' => 'users',
      'field' => 'uid',
    );
  }
  public function query() {
    $this
      ->add_additional_fields();
    $this->field_alias = $this->aliases['uid'];
  }
  function pre_render(&$values) {
    $uids = array();
    $this->items = array();
    foreach ($values as $result) {
      $uids[] = $this
        ->get_value($result);
    }
    if ($uids) {

      // Get a list of all the modules implementing a hook_permission() and sort by
      // display name.
      $module_info = system_get_info('module');
      $modules = array();
      foreach (module_implements('permission') as $module) {
        $modules[$module] = $module_info[$module]['name'];
      }
      asort($modules);
      $permissions = module_invoke_all('permission');
      $query = db_select('role_permission', 'rp');
      $query
        ->join('users_roles', 'u', 'u.rid = rp.rid');
      $query
        ->fields('u', array(
        'uid',
        'rid',
      ));
      $query
        ->addField('rp', 'permission');
      $query
        ->condition('u.uid', $uids);
      $query
        ->condition('rp.module', array_keys($modules));
      $query
        ->orderBy('rp.permission');
      $result = $query
        ->execute();
      foreach ($result as $perm) {
        $this->items[$perm->uid][$perm->permission]['permission'] = $permissions[$perm->permission]['title'];
      }
    }
  }
  function render_item($count, $item) {
    return $item['permission'];
  }

}