Permissions.php

<?php

namespace Drupal\user\Plugin\views\filter;

use Drupal\Component\Utility\Html;
use Drupal\Core\Extension\ModuleHandlerInterface;
use Drupal\user\PermissionHandlerInterface;
use Drupal\views\Plugin\views\filter\ManyToOne;
use Symfony\Component\DependencyInjection\ContainerInterface;

/**
 * Filter handler for user roles.
 *
 * @ingroup views_filter_handlers
 *
 * @ViewsFilter("user_permissions")
 */
class Permissions extends ManyToOne {
    
    /**
     * The permission handler.
     *
     * @var \Drupal\user\PermissionHandlerInterface
     */
    protected $permissionHandler;
    
    /**
     * The module handler.
     *
     * @var \Drupal\Core\Extension\ModuleHandlerInterface
     */
    protected $moduleHandler;
    
    /**
     * Constructs a Permissions object.
     *
     * @param array $configuration
     *   A configuration array containing information about the plugin instance.
     * @param string $plugin_id
     *   The plugin_id for the plugin instance.
     * @param mixed $plugin_definition
     *   The plugin implementation definition.
     * @param \Drupal\user\PermissionHandlerInterface $permission_handler
     *   The permission handler.
     * @param \Drupal\Core\Extension\ModuleHandlerInterface $module_handler
     *   The module handler.
     */
    public function __construct(array $configuration, $plugin_id, $plugin_definition, PermissionHandlerInterface $permission_handler, ModuleHandlerInterface $module_handler) {
        parent::__construct($configuration, $plugin_id, $plugin_definition);
        $this->permissionHandler = $permission_handler;
        $this->moduleHandler = $module_handler;
    }
    
    /**
     * {@inheritdoc}
     */
    public static function create(ContainerInterface $container, array $configuration, $plugin_id, $plugin_definition) {
        return new static($configuration, $plugin_id, $plugin_definition, $container->get('user.permissions'), $container->get('module_handler'));
    }
    public function getValueOptions() {
        if (!isset($this->valueOptions)) {
            $permissions = $this->permissionHandler
                ->getPermissions();
            foreach ($permissions as $perm => $perm_item) {
                $provider = $perm_item['provider'];
                $display_name = $this->moduleHandler
                    ->getName($provider);
                $this->valueOptions[$display_name][$perm] = Html::escape(strip_tags($perm_item['title']));
            }
            return $this->valueOptions;
        }
        else {
            return $this->valueOptions;
        }
    }
    
    /**
     * {@inheritdoc}
     *
     * Replace the configured permission with a filter by all roles that have this
     * permission.
     */
    public function query() {
        // @todo user_role_names() should maybe support multiple permissions.
        $rids = [];
        // Get all role IDs that have the configured permissions.
        foreach ($this->value as $permission) {
            $roles = user_role_names(FALSE, $permission);
            // user_role_names() returns an array with the role IDs as keys, so take
            // the array keys and merge them with previously found role IDs.
            $rids = array_merge($rids, array_keys($roles));
        }
        // Remove any duplicate role IDs.
        $rids = array_unique($rids);
        $this->value = $rids;
        // $this->value contains the role IDs that have the configured permission.
        parent::query();
    }

}