bbp_update_topic( int $topic_id, int $forum_id, bool|array $anonymous_data = false, int $author_id, bool $is_edit = false )

function bbp_update_topic( $topic_id = 0, $forum_id = 0, $anonymous_data = false, $author_id = 0, $is_edit = false ) {

	// Validate the ID's passed from 'bbp_new_topic' action
	$topic_id = bbp_get_topic_id( $topic_id );
	$forum_id = bbp_get_forum_id( $forum_id );

	// Bail if there is no topic
	if ( empty( $topic_id ) )
		return;

	// Check author_id
	if ( empty( $author_id ) )
		$author_id = bbp_get_current_user_id();

	// Check forum_id
	if ( empty( $forum_id ) )
		$forum_id = bbp_get_topic_forum_id( $topic_id );

	// If anonymous post, store name, email, website and ip in post_meta.
	// It expects anonymous_data to be sanitized.
	// Check bbp_filter_anonymous_post_data() for sanitization.
	if ( !empty( $anonymous_data ) && is_array( $anonymous_data ) ) {

		// Parse arguments against default values
		$r = bbp_parse_args( $anonymous_data, array(
			'bbp_anonymous_name'    => '',
			'bbp_anonymous_email'   => '',
			'bbp_anonymous_website' => '',
		), 'update_topic' );

		// Update all anonymous metas
		foreach ( $r as $anon_key => $anon_value ) {
			update_post_meta( $topic_id, '_' . $anon_key, (string) $anon_value, false );
		}

		// Set transient for throttle check (only on new, not edit)
		if ( empty( $is_edit ) ) {
			set_transient( '_bbp_' . bbp_current_author_ip() . '_last_posted', time() );
		}

	} else {
		if ( empty( $is_edit ) && !current_user_can( 'throttle' ) ) {
			bbp_update_user_last_posted( $author_id );
		}
	}

	// Handle Subscription Checkbox
	if ( bbp_is_subscriptions_active() && !empty( $author_id ) ) {
		$subscribed = bbp_is_user_subscribed( $author_id, $topic_id );
		$subscheck  = ( !empty( $_POST['bbp_topic_subscription'] ) && ( 'bbp_subscribe' === $_POST['bbp_topic_subscription'] ) ) ? true : false;

		// Subscribed and unsubscribing
		if ( true === $subscribed && false === $subscheck ) {
			bbp_remove_user_subscription( $author_id, $topic_id );

		// Subscribing
		} elseif ( false === $subscribed && true === $subscheck ) {
			bbp_add_user_subscription( $author_id, $topic_id );
		}
	}

	// Forum topic meta
	bbp_update_topic_forum_id( $topic_id, $forum_id );
	bbp_update_topic_topic_id( $topic_id, $topic_id );

	// Update associated topic values if this is a new topic
	if ( empty( $is_edit ) ) {

		// Update poster IP if not editing
		update_post_meta( $topic_id, '_bbp_author_ip', bbp_current_author_ip(), false );

		// Last active time
		$last_active = current_time( 'mysql' );

		// Reply topic meta
		bbp_update_topic_last_reply_id      ( $topic_id, 0            );
		bbp_update_topic_last_active_id     ( $topic_id, $topic_id    );
		bbp_update_topic_last_active_time   ( $topic_id, $last_active );
		bbp_update_topic_reply_count        ( $topic_id, 0            );
		bbp_update_topic_reply_count_hidden ( $topic_id, 0            );
		bbp_update_topic_voice_count        ( $topic_id               );

		// Walk up ancestors and do the dirty work
		bbp_update_topic_walker( $topic_id, $last_active, $forum_id, 0, false );
	}
}