anonymize-bbpress.php

<?php
/*
Plugin Name: Anonymize bbPress
Plugin URI: https://gist.github.com/jessuppi/0663069e94af7f397510990ccd576a30
Description: Enables guest users to participate in bbPress forums without providing an email address or URL, and assigns randomized user names to every single post.
Version: 1.0.0
Author: Birgir Erlendsson, Jesse Nickles
License: GPLv3
License URI: https://www.gnu.org/licenses/gpl-3.0.html
*/

$random_names_list = array("John", "Mike", "Will", "Pete", "Lucy", "Barbara");
$random_name = $random_names_list[array_rand($random_names_list)];

add_action( 'init', array( 'WPSE_Empty_Anonymous_Replies', 'init' ) );

class WPSE_Empty_Anonymous_Replies
{
        static protected $name  = 'nobody'; // $random_name
        static protected $email = '[email protected]';

        static public function init()
        {
            add_filter( 'bbp_filter_anonymous_post_data', 
                         array( __CLASS__, 'bbp_filter_anonymous_post_data' ),                    
                         11, 2 );
            add_filter( 'bbp_pre_anonymous_post_author_name', 
                         array( __CLASS__,  'bbp_pre_anonymous_post_author_name' ) );
            add_filter( 'bbp_pre_anonymous_post_author_email',  
                         array( __CLASS__, 'bbp_pre_anonymous_post_author_email' ) );
        }

        static public function bbp_filter_anonymous_post_data( $retval, $r )
        {
            if( self::$name === $r['bbp_anonymous_name'] 
                && self::$email === $r['bbp_anonymous_email'] )
            {   
                // reset the input to skip writing cookies 
                $retval = array();

                // trick to activate the IP flood check 
                $retval['bbp_anonymous_flood_check'] = '1';
            }       
            return $retval;
        }

        static public function bbp_pre_anonymous_post_author_name( $name )
        {
            remove_filter( current_filter(), array( __CLASS__, __FUNCTION__ ) );
            if( empty( $name ) )
                $name = self::$name;

            return $name;
        }

        static public function bbp_pre_anonymous_post_author_email( $email )
        {
            remove_filter( current_filter(), array( __CLASS__, __FUNCTION__ ) );
            if( empty( $email ) )
                $email = self::$email;

            return $email;
        }
    }

// load dummy stylesheet
wp_register_style('anonymize_bbpress_styles', false);
wp_enqueue_style('anonymize_bbpress_styles');

// add some inline CSS rules to hide fields
wp_add_inline_style('anonymize_bbpress_styles', 'fieldset.bbp-form label,input { display:none !important; }');

// Ref: https://wordpress.stackexchange.com/questions/131550/how-do-i-set-up-real-anonymous-posting-in-bbpress-forums
// Ref: https://developer.wordpress.org/reference/functions/wp_add_inline_style/
// Ref: https://gist.github.com/neilgee/bdf621baa3d535c97d9d
// Ref: https://wordpress.stackexchange.com/questions/168867/using-wp-add-inline-style-without-a-stylesheet
// Ref: https://wordpress.stackexchange.com/questions/408851/how-to-add-some-basic-inline-css-using-existing-plugin-or-theme
// Ref: https://randomtechnofestivalnamegenerator.nl/how-to-make-a-random-generator-with-php/