Convert Post, Commets and Categories to bbPress

gistfile1.php

<?php
require_once('wp-blog-header.php');

set_time_limit(0);

$categories = get_terms('category');


foreach ($categories as $category) {
  $default_forum = array(	
		'post_title'     => $category->name,
	);
	

	$forum = bbp_insert_forum( $default_forum );

	$args = array(
			'post_type' => 'post',
			'cat' => $category->term_id,
			'posts_per_page' => '-1'

		);

	$the_query = new WP_Query( $args );


	if ( $the_query->have_posts() ) :
		while ( $the_query->have_posts() ) : $the_query->the_post();
			$default_topic = array(
				'post_parent' => $forum,
				'post_author'    => $post->post_author,
				'post_date'    => $post->post_date,
				'post_title'     => $post->post_title,
				'post_content' => $post->post_content
			);

			$default_meta = array(
				'forum_id'           => $forum
			);

			$topic = bbp_insert_topic( $default_topic, $default_meta );
			$comments = get_comments( array( 'post_id' => $post->ID ) );
			foreach ($comments as $comment) {
				$default_reply = array(
					'post_parent'    => $topic, // topic ID
					'post_author'    => $comment->user_id,
					'post_content'   => $comment->comment_content,
					'post_date'    => $comment->comment_date,
				);

				$default_meta = array(
					'author_ip' => $comment->comment_author_IP,
					'forum_id'  => $forum,
					'topic_id'  => $topic,
				);

				bbp_insert_reply( $default_reply, $default_meta );
			}

		endwhile;
	endif;
	// wp_reset_postdata();
}