Includes a WPGraphQL JWT token in every posts preview link. That can be used for an external application (e.g. Next.js) to include in the authorization header when contacting back the WordPress instance using the WPGraphQL.
| <?php | |
| /** | |
| * Plugin Name: WPGraphQL JWT in Preview Link | |
| * Plugin URI: https://gist.github.com/lightningspirit/5f8a1aff58a0f944cf9333e511870411 | |
| * Description: Includes a WPGraphQL JWT token in every posts preview link | |
| * Author: Move Your Digital, Inc. | |
| * Author URI: https://moveyourdigital.com | |
| * Version: 0.1.0 | |
| * | |
| * @package WPGraphQL_JWT_Preview_Link | |
| */ | |
| /* | |
| This program is free software; you can redistribute it and/or modify | |
| it under the terms of the GNU General Public License as published by | |
| the Free Software Foundation; either version 2 of the License, or | |
| (at your option) any later version. | |
| This program is distributed in the hope that it will be useful, | |
| but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| GNU General Public License for more details. | |
| You should have received a copy of the GNU General Public License | |
| along with this program; if not, write to the Free Software | |
| Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
| */ | |
| namespace WPGraphQL\JWT_Preview_Link; | |
| // If this file is called directly, abort. | |
| if (!defined('WPINC')) { | |
| die; | |
| } | |
| /** | |
| * Generates a new JWT token for the given user | |
| * | |
| * @param WP_User given user or null for current user | |
| * @return string the JWT token | |
| */ | |
| function generate_jwt_token(\WP_User $user = null) | |
| { | |
| if (null == $user) { | |
| $user = get_user_by('ID', get_current_user_id()); | |
| } | |
| $jwt = \WPGraphQL\JWT_Authentication\Auth::get_token($user, false); | |
| return $jwt; | |
| } | |
| /** | |
| * Filters the URL used for a post preview. | |
| * | |
| * @since 2.0.5 | |
| * @since 4.0.0 Added the `$post` parameter. | |
| * | |
| * @param string $preview_link URL used for the post preview. | |
| * @param WP_Post $post Post object. | |
| */ | |
| add_action('preview_post_link', function ($preview_link, $post) { | |
| if (!class_exists('\WPGraphQL\JWT_Authentication\Auth')) return $preview_link; | |
| $key = 'jwt_token_user_' . get_current_user_id(); | |
| $jwt = get_transient($key); | |
| if (!$jwt) { | |
| $jwt = generate_jwt_token(); | |
| set_transient($key, $jwt, 300); | |
| } | |
| return $preview_link . "&token=" . $jwt; | |
| }, 10, 2); |