class NodePermissions

class NodePermissions {
    use BundlePermissionHandlerTrait;
    use StringTranslationTrait;
    
    /**
     * Returns an array of node type permissions.
     *
     * @return array
     *   The node type permissions.
     *   @see \Drupal\user\PermissionHandlerInterface::getPermissions()
     */
    public function nodeTypePermissions() {
        return $this->generatePermissions(NodeType::loadMultiple(), [
            $this,
            'buildPermissions',
        ]);
    }
    
    /**
     * Returns a list of node permissions for a given node type.
     *
     * @param \Drupal\node\Entity\NodeType $type
     *   The node type.
     *
     * @return array
     *   An associative array of permission names and descriptions.
     */
    protected function buildPermissions(NodeType $type) {
        $type_id = $type->id();
        $type_params = [
            '%type_name' => $type->label(),
        ];
        return [
            "create {$type_id} content" => [
                'title' => $this->t('%type_name: Create new content', $type_params),
            ],
            "edit own {$type_id} content" => [
                'title' => $this->t('%type_name: Edit own content', $type_params),
                'description' => $this->t('Note that anonymous users with this permission are able to edit any content created by any anonymous user.'),
            ],
            "edit any {$type_id} content" => [
                'title' => $this->t('%type_name: Edit any content', $type_params),
            ],
            "delete own {$type_id} content" => [
                'title' => $this->t('%type_name: Delete own content', $type_params),
                'description' => $this->t('Note that anonymous users with this permission are able to delete any content created by any anonymous user.'),
            ],
            "delete any {$type_id} content" => [
                'title' => $this->t('%type_name: Delete any content', $type_params),
            ],
            "view {$type_id} revisions" => [
                'title' => $this->t('%type_name: View revisions', $type_params),
                'description' => t('To view a revision, you also need permission to view the content item.'),
            ],
            "revert {$type_id} revisions" => [
                'title' => $this->t('%type_name: Revert revisions', $type_params),
                'description' => t('To revert a revision, you also need permission to edit the content item.'),
            ],
            "delete {$type_id} revisions" => [
                'title' => $this->t('%type_name: Delete revisions', $type_params),
                'description' => $this->t('To delete a revision, you also need permission to delete the content item.'),
            ],
        ];
    }

}