BP_Document::total_document_count( int $user_id )

	public static function total_document_count( $user_id = 0 ) {
		global $bp, $wpdb;

		$privacy = array( 'public' );
		if ( is_user_logged_in() ) {
			$privacy[] = 'loggedin';
			if ( bp_is_active( 'friends' ) ) {
				$is_friend = friends_check_friendship( get_current_user_id(), $user_id );
				if ( $is_friend ) {
					$privacy[] = 'friends';
				}
			}
		}
		$privacy = "'" . implode( "', '", $privacy ) . "'";

		$total_count_document = (int) $wpdb->get_var( "SELECT COUNT(*) FROM {$bp->document->table_name} WHERE user_id = {$user_id} AND privacy IN ({$privacy}) AND folder_id = 0" );       // db call ok; no-cache ok;
		$total_count_folder   = (int) $wpdb->get_var( "SELECT COUNT(*) FROM {$bp->document->table_name_folder} WHERE user_id = {$user_id} AND privacy IN ({$privacy}) AND parent = 0" ); // db call ok; no-cache ok;
		$total_count          = $total_count_folder + $total_count_document;

		return $total_count;
	}