View file File name : Pagination.php Content :<?php namespace Automattic\WooCommerce\StoreApi\Utilities; /** * Pagination class. */ class Pagination { /** * Add pagination headers to a response object. * * @param \WP_REST_Response $response Reference to the response object. * @param \WP_REST_Request $request The request object. * @param int $total_items Total items found. * @param int $total_pages Total pages found. * @return \WP_REST_Response */ public function add_headers( $response, $request, $total_items, $total_pages ) { $response->header( 'X-WP-Total', $total_items ); $response->header( 'X-WP-TotalPages', $total_pages ); $current_page = $this->get_current_page( $request ); $link_base = $this->get_link_base( $request ); if ( $current_page > 1 ) { $previous_page = $current_page - 1; if ( $previous_page > $total_pages ) { $previous_page = $total_pages; } $this->add_page_link( $response, 'prev', $previous_page, $link_base ); } if ( $total_pages > $current_page ) { $this->add_page_link( $response, 'next', ( $current_page + 1 ), $link_base ); } return $response; } /** * Get current page. * * @param \WP_REST_Request $request The request object. * @return int Get the page from the request object. */ protected function get_current_page( $request ) { return (int) $request->get_param( 'page' ); } /** * Get base for links from the request object. * * @param \WP_REST_Request $request The request object. * @return string */ protected function get_link_base( $request ) { return esc_url( add_query_arg( $request->get_query_params(), rest_url( $request->get_route() ) ) ); } /** * Add a page link. * * @param \WP_REST_Response $response Reference to the response object. * @param string $name Page link name. e.g. prev. * @param int $page Page number. * @param string $link_base Base URL. */ protected function add_page_link( &$response, $name, $page, $link_base ) { $response->link_header( $name, add_query_arg( 'page', $page, $link_base ) ); } }