gistfile1.txt

<?php
/**
 * Sync key options with blog meta
 *
 * @package   Blog_Meta_Sync
 * @author    Jonathan Harris <[email protected]>
 * @license   GPL-2.0+
 * @link      http://www.jonathandavidharris.co.uk/
 * @copyright 2017 Spacedmonkey
 *
 * @wordpress-plugin
 * Plugin Name:        Blog Meta option syncing
 * Plugin URI:         https://www.github.com/spacedmonkey/advanced-nav-cache
 * Description:        Sync key options with blog meta
 * Version:            1.0.0
 * Author:             Jonathan Harris
 * Author URI:         http://www.jonathandavidharris.co.uk/
 * License:            GPL-2.0+
 * License URI:        http://www.gnu.org/licenses/gpl-2.0.txt
 * GitHub Plugin URI:  https://www.github.com/spacedmonkey/blog-meta-sync
 */
// If this file is called directly, abort.
if ( ! defined( 'WPINC' ) ) {
	die;
}

class Blog_Meta_Sync{
    /**
  	 * List of filters to run this string replace on
  	 *
  	 * @since     1.0.0
  	 *
  	 * @var array
  	 */
  	protected $filters = array(
        'stylesheet',
        'blog_charset',
        'template',
        'WPLANG',
        'blogname',
        'siteurl',
        'post_count',
        'home',
        'allowedthemes',
        'blog_public',
        'WPLANG',
        'blogdescription',
        'db_version',
				'db_upgraded',
        'active_plugins',
        'users_can_register',
        'admin_email',
				'wp_user_roles'
  	);

    public function __construct(){
      foreach( $this->filters as $filter ){
        add_filter( 'pre_option_'.$filter, array( $this, 'pre_get_option' ), 1, 2 );
      }
      add_action( 'updated_option', array( $this, 'updated_option' ), 10, 3 );
      add_action( 'added_option', array( $this, 'added_option' ), 10, 2 );
      add_action( 'delete_option', array( $this, 'delete_option' ), 10, 1 );
      add_action( 'wp_upgrade', array( $this, 'wp_upgrade' ), 10, 1 );
      add_action( 'pre_get_sites', array( $this, 'pre_get_sites' ), 15, 1 );

			add_action( 'added_blog_meta', array( $this, 'added_blog_meta' ), 10, 4 );
			add_action( 'updated_blog_meta', array( $this, 'updated_blog_meta' ), 10, 4 );
			add_action( 'deleted_blog_meta', array( $this, 'deleted_blog_meta' ), 10, 3 );

			add_action( 'wpmu_new_blog', array( $this, 'wpmu_new_blog' ), 10, 1 );

		}

    function pre_get_option( $value, $option ){
        $blog_id = get_current_blog_id();
        $meta = get_blog_meta( $blog_id, $option, true );
        if( false != $meta ){
					$value = $meta;
				} else{
					add_filter( 'option_'.$option, array( $this, 'get_option' ), 1, 2 );
				}
				return $value;
    }

    function get_option( $value, $option ){
        if( !$this->check_option( $option ) || false == $value ){
          return;
        }
        $blog_id = get_current_blog_id();
    		update_blog_meta( $blog_id, $option, $value );
    }
    function updated_option( $option, $old_value, $value ){
        if( !$this->check_option( $option ) ){
          return;
        }
        $blog_id = get_current_blog_id();
    	  update_blog_meta( $blog_id, $option, $value, $old_value );
    }

    function added_option( $option, $value ){
      if( !$this->check_option( $option ) ){
        return;
      }
    	$blog_id = get_current_blog_id();
    	add_blog_meta( $blog_id, $option, $value, true );
    }

    function delete_option( $option ){
      if( !$this->check_option( $option ) ){
        return;
      }
    	$blog_id = get_current_blog_id();
    	delete_blog_meta( $blog_id, $option );
    }

    function wp_upgrade( $wp_db_version ){
    	$blog_id = get_current_blog_id();
      update_blog_meta( $blog_id, 'wp_db_version', $wp_db_version );
    }

    function pre_get_sites( $site_query ) {
      if ( ! isset( $site_query->query_var_defaults['update_blog_meta_cache'] ) ) {
          $site_query->query_var_defaults['update_blog_meta_cache'] = true;
      }
    }

		function added_blog_meta( $meta_id, $id, $option, $value ){
			if( !$this->check_option( $option ) ){
        return;
      }
			remove_action( 'updated_option', array( $this, 'updated_option' ), 10, 3 );
			remove_action( 'added_option', array( $this, 'added_option' ), 10, 2 );
			add_blog_option( $id, $option, $value );
			add_action( 'updated_option', array( $this, 'updated_option' ), 10, 3 );
			add_action( 'added_option', array( $this, 'added_option' ), 10, 2 );
		}

		function updated_blog_meta( $meta_id, $id, $option, $value ){
			if( !$this->check_option( $option ) ){
        return;
      }
			remove_action( 'updated_option', array( $this, 'updated_option' ), 10, 3 );
			remove_action( 'added_option', array( $this, 'added_option' ), 10, 2 );
			update_blog_option( $id, $option, $value );
			add_action( 'updated_option', array( $this, 'updated_option' ), 10, 3 );
			add_action( 'added_option', array( $this, 'added_option' ), 10, 2 );
		}

		function deleted_blog_meta( $meta_id, $id, $option ){
			if( !$this->check_option( $option ) ){
        return;
      }
			remove_action( 'delete_option', array( $this, 'delete_option' ), 10, 1 );
			delete_blog_option( $id, $option );
			add_action( 'delete_option', array( $this, 'delete_option' ), 10, 1 );
		}

		function wpmu_new_blog( $blog_id ){
			switch_to_blog( $blog_id );
			foreach( $this->filters as $option ){
				get_option( $option );
			}
			restore_current_blog();
		}

    protected function check_option( $option ){
      return in_array( $option, $this->filters );
    }

}
new Blog_Meta_Sync();