bbp_body_class( array $wp_classes, array $custom_classes = false )

function bbp_body_class( $wp_classes, $custom_classes = false ) {

	$bbp_classes = array();

	/** Archives **************************************************************/

	if ( bbp_is_forum_archive() ) {
		$bbp_classes[] = bbp_get_forum_post_type() . '-archive';

	} elseif ( bbp_is_topic_archive() ) {
		$bbp_classes[] = bbp_get_topic_post_type() . '-archive';

	/** Topic Tags ************************************************************/

	} elseif ( bbp_is_topic_tag() ) {
		$bbp_classes[] = bbp_get_topic_tag_tax_id();
		$bbp_classes[] = bbp_get_topic_tag_tax_id() . '-' . bbp_get_topic_tag_slug();
		$bbp_classes[] = bbp_get_topic_tag_tax_id() . '-' . bbp_get_topic_tag_id();
	} elseif ( bbp_is_topic_tag_edit() ) {
		$bbp_classes[] = bbp_get_topic_tag_tax_id() . '-edit';
		$bbp_classes[] = bbp_get_topic_tag_tax_id() . '-' . bbp_get_topic_tag_slug() . '-edit';
		$bbp_classes[] = bbp_get_topic_tag_tax_id() . '-' . bbp_get_topic_tag_id()   . '-edit';

	/** Components ************************************************************/

	} elseif ( bbp_is_single_forum() ) {
		$bbp_classes[] = bbp_get_forum_post_type();

	} elseif ( bbp_is_single_topic() ) {
		$bbp_classes[] = bbp_get_topic_post_type();

	} elseif ( bbp_is_single_reply() ) {
		$bbp_classes[] = bbp_get_reply_post_type();

	} elseif ( bbp_is_topic_edit() ) {
		$bbp_classes[] = bbp_get_topic_post_type() . '-edit';

	} elseif ( bbp_is_topic_merge() ) {
		$bbp_classes[] = bbp_get_topic_post_type() . '-merge';

	} elseif ( bbp_is_topic_split() ) {
		$bbp_classes[] = bbp_get_topic_post_type() . '-split';

	} elseif ( bbp_is_reply_edit() ) {
		$bbp_classes[] = bbp_get_reply_post_type() . '-edit';

	} elseif ( bbp_is_reply_move() ) {
		$bbp_classes[] = bbp_get_reply_post_type() . '-move';

	} elseif ( bbp_is_single_view() ) {
		$bbp_classes[] = 'bbp-view';

	/** User ******************************************************************/

	} elseif ( bbp_is_single_user_edit() ) {
		$bbp_classes[] = 'bbp-user-edit';
		$bbp_classes[] = 'single';
		$bbp_classes[] = 'singular';

	} elseif ( bbp_is_single_user() ) {
		$bbp_classes[] = 'bbp-user-page';
		$bbp_classes[] = 'single';
		$bbp_classes[] = 'singular';

	} elseif ( bbp_is_user_home() ) {
		$bbp_classes[] = 'bbp-user-home';
		$bbp_classes[] = 'single';
		$bbp_classes[] = 'singular';

	} elseif ( bbp_is_user_home_edit() ) {
		$bbp_classes[] = 'bbp-user-home-edit';
		$bbp_classes[] = 'single';
		$bbp_classes[] = 'singular';

	} elseif ( bbp_is_topics_created() ) {
		$bbp_classes[] = 'bbp-topics-created';
		$bbp_classes[] = 'single';
		$bbp_classes[] = 'singular';

	} elseif ( bbp_is_favorites() ) {
		$bbp_classes[] = 'bbp-favorites';
		$bbp_classes[] = 'single';
		$bbp_classes[] = 'singular';

	} elseif ( bbp_is_subscriptions() ) {
		$bbp_classes[] = 'bbp-subscriptions';
		$bbp_classes[] = 'single';
		$bbp_classes[] = 'singular';

	/** Search ****************************************************************/

	} elseif ( bbp_is_search() ) {
		$bbp_classes[] = 'bbp-search';
		$bbp_classes[] = 'forum-search';

	} elseif ( bbp_is_search_results() ) {
		$bbp_classes[] = 'bbp-search-results';
		$bbp_classes[] = 'forum-search-results';
	}

	/** Clean up **************************************************************/

	// Add Forums class if we are within a Forums page
	if ( !empty( $bbp_classes ) ) {
		$bbp_classes[] = 'bbpress';
	}

	// Merge WP classes with Forums classes and remove any duplicates
	$classes = array_unique( array_merge( (array) $bbp_classes, (array) $wp_classes ) );

	// Deprecated filter (do not use)
	$classes = apply_filters( 'bbp_get_the_body_class', $classes, $bbp_classes, $wp_classes, $custom_classes );

	return apply_filters( 'bbp_body_class', $classes, $bbp_classes, $wp_classes, $custom_classes );
}