bp_document_folder_bradcrumb( $folder_id )

function bp_document_folder_bradcrumb( $folder_id ) {

	global $wpdb, $bp;

	$document_folder_table  = $bp->document->table_name_folder;
	$documents_folder_query = $wpdb->prepare(
		"SELECT c.*
    FROM (
        SELECT
            @r AS _id,
            (SELECT @r := parent FROM {$document_folder_table} WHERE id = _id) AS parent,
            @l := @l + 1 AS level
        FROM
            (SELECT @r := %d, @l := 0) vars, {$document_folder_table} m
        WHERE @r <> 0) d
    JOIN {$document_folder_table} c
    ON d._id = c.id ORDER BY d.level ASC",
		$folder_id
	);

	$data = $wpdb->get_results( $documents_folder_query, ARRAY_A ); // db call ok; no-cache ok;
	$html = '';

	if ( ! empty( $data ) ) {
		$data  = array_reverse( $data );
		$html .= '<ul class="document-breadcrumb">';
		if ( bp_is_group() && bp_is_group_single() ) {
			$group = groups_get_group( array( 'group_id' => bp_get_current_group_id() ) );
			$link  = bp_get_group_permalink( $group ) . bp_get_document_slug();
			$html .= '<li><a href=" ' . $link . ' "> ' . __( 'Documents', 'buddyboss' ) . '</a></li>';
		} else {
			$link  = bp_displayed_user_domain() . bp_get_document_slug();
			$html .= '<li><a href=" ' . $link . ' "> ' . __( 'Documents', 'buddyboss' ) . '</a></li>';
		}

		if ( count( $data ) > 3 ) {
			$html .= '<li>' . __( '...', 'buddyboss' ) . '</li>';
			$data  = array_slice( $data, - 3 );
		}
		foreach ( $data as $element ) {
			$link     = '';
			$group_id = (int) $element['group_id'];
			if ( 0 === $group_id ) {
				$link = bp_displayed_user_domain() . bp_get_document_slug() . '/folders/' . $element['id'];
			} else {
				$group = groups_get_group( array( 'group_id' => $group_id ) );
				$link  = bp_get_group_permalink( $group ) . bp_get_document_slug() . '/folders/' . $element['id'];
			}
			$html .= '<li> <a href=" ' . $link . ' ">' . stripslashes( $element['title'] ) . '</a></li>';
		}
		$html .= '</ul>';
	}

	return $html;

}