public function add_pagination_headers( $query ) {

		// WP_User_Query
		if ( is_a( $query, 'WP_User_Query' ) ) {

			$single      = count( $query->get_results() ) == 1;
			$total       = $query->get_total();

			if ( $query->get( 'number' ) > 0 ) {
				$page = ( $query->get( 'offset' ) / $query->get( 'number' ) ) + 1;
				$total_pages = ceil( $total / $query->get( 'number' ) );
			} else {
				$page = 1;
				$total_pages = 1;
			}
		} elseif ( is_a( $query, 'stdClass' ) ) {
			$page        = $query->page;
			$single      = $query->is_single;
			$total       = $query->total;
			$total_pages = $query->total_pages;

		// WP_Query
		} else {

			$page        = $query->get( 'paged' );
			$single      = $query->is_single();
			$total       = $query->found_posts;
			$total_pages = $query->max_num_pages;
		}

		if ( ! $page ) {
			$page = 1;
		}

		$next_page = absint( $page ) + 1;

		if ( ! $single ) {

			// first/prev
			if ( $page > 1 ) {
				$this->link_header( 'first', $this->get_paginated_url( 1 ) );
				$this->link_header( 'prev', $this->get_paginated_url( $page -1 ) );
			}

			// next
			if ( $next_page <= $total_pages ) {
				$this->link_header( 'next', $this->get_paginated_url( $next_page ) );
			}

			// last
			if ( $page != $total_pages ) {
				$this->link_header( 'last', $this->get_paginated_url( $total_pages ) );
			}
		}

		$this->header( 'X-WC-Total', $total );
		$this->header( 'X-WC-TotalPages', $total_pages );

		do_action( 'woocommerce_api_pagination_headers', $this, $query );
	}