* @uses wp_get_post_revisions() To get the topic revisions
 * @uses apply_filters() Calls 'bbp_get_topic_revisions'
 *                        with the revisions and topic id
 * @return string Topic revisions
 */
function bbp_get_topic_revisions( $topic_id = 0 ) {
	$topic_id  = bbp_get_topic_id( $topic_id );
	$revisions = wp_get_post_revisions( $topic_id, array( 'order' => 'ASC' ) );

	return apply_filters( 'bbp_get_topic_revisions', $revisions, $topic_id );
}

/**
 * Return the revision count of the topic
 *
 * @since bbPress (r2782)
 *
 * @param int $topic_id Optional. Topic id
 * @uses bbp_get_topic_revisions() To get the topic revisions
 * @uses apply_filters() Calls 'bbp_get_topic_revision_count'

 * @since bbPress (r2782)
 *
 * @param int $topic_id Optional. Topic id
 * @uses bbp_get_topic_revisions() To get the topic revisions
 * @uses apply_filters() Calls 'bbp_get_topic_revision_count'
 *                        with the revision count and topic id
 * @return string Topic revision count
 */
function bbp_get_topic_revision_count( $topic_id = 0 ) {
	return apply_filters( 'bbp_get_topic_revisions', count( bbp_get_topic_revisions( $topic_id ) ), $topic_id );
}

/**
 * Output the status of the topic
 *
 * @since bbPress (r2667)
 *
 * @param int $topic_id Optional. Topic id
 * @uses bbp_get_topic_status() To get the topic status
 */