Includes a `readingTime` field in seconds for every `Post` object response.

README.md

WPGraphQL Post Reading Time

Includes a readingTime field in seconds for every Post object response.

Usage

1. Download this ZIP
2. Upload to plugins
3. Activate it

wpgraphql-reading-time.php

<?php

/**
 * Plugin Name:     WPGraphQL Post Reading Time
 * Plugin URI:      https://gist.github.com/lightningspirit/a316117fbb9294da0d15f57553875033
 * Description:     Includes a `readingTime` field in seconds for every `Post` object response.
 * Author:          Move Your Digital, Inc.
 * Author URI:      https://moveyourdigital.com
 * Version:         0.1.0
 *
 * @package         WPGraphQL_Post_Reading_Time
 */

/*
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
*/

// If this file is called directly, abort.
if (!defined('WPINC')) {
  die;
}

add_action('graphql_register_types', function () {
  register_graphql_fields(
    'Post',
    [
      'readingTime' => [
        'description' => __('Estimated post reading time', 'contasconnosco'),
        'type' => 'int',
        'resolve' => function (WPGraphQL\Model\Post $post) {
          $word_count = str_word_count(strip_tags($post->contentRendered));
          return ceil($word_count / 300);
        },
      ],
    ],
  );
});