WordPress rest api for get all products by sorting like latest, price, rating or popularity

class-ewpapi-all-products-by-sorting-rest-controller.php

<?php
/**
 * All Products By Sorting.
 *
 * @package :ewpapi
 */

/**
 *
 * Add an endpoint to show all products by sorting.
 **/
class Ewpapi_All_Products_By_Sorting_REST_Controller {
	/**
	 * Add an endpoint to show all products by sorting.
	 */
	public function __construct() {
		add_action( 'rest_api_init', array( $this, 'products_by_sorting' ) );
	}
	/**
	 * Show all products by sorting.
	 */
	public function products_by_sorting() {
		$route_namespace = apply_filters( 'ewpapi_route_namespace', 'ewpapi/v1' );
		register_rest_route(
			$route_namespace,
			'/products-by-sorting',
			array(
				'methods'             => 'POST',
				'callback'            => function( $data ) {
					if ( empty( $data['number'] ) ) {
						$post_per_page = 12;
					} else {
						$post_per_page = $data['number'];
					}
					$order = ! empty( $data['order'] ) ? $data['order'] : 'desc';
					$orderby = ! empty( $data['orderby'] ) ? $data['orderby'] : 'date';

					$args = array(
						'post_status'    => 'publish',
						'post_type'      => 'product',
						'orderby'        => $orderby,
						'order'          => $order,
						'posts_per_page' => $post_per_page,
					);
					switch ( $orderby ) {
						case 'price':
							$args['meta_key'] = '_price';
							$args['orderby']  = 'meta_value_num';
							$order = ! empty( $data['order'] ) ? $data['order'] : 'asc';
							$args['order'] = $order;
							break;
						case 'rating':
							$args['orderby'] = 'meta_value_num';
							$args['meta_key'] = '_wc_average_rating';
							$order = ! empty( $data['order'] ) ? $data['order'] : 'desc';
							$args['order'] = $order;
							break;
						case 'popularity':
							$args['orderby'] = 'meta_value_num';
							$args['meta_key'] = 'total_sales';
							$order = ! empty( $data['order'] ) ? $data['order'] : 'desc';
							$args['order'] = $order;
							break;
					}

						$products_by_sorting = get_posts( $args );
					if ( is_array( $products_by_sorting ) && ! empty( $products_by_sorting ) ) {
						foreach ( $products_by_sorting as $products_by_sorting ) {
							$product_id = $products_by_sorting->ID;
							$image = get_the_post_thumbnail_url( $product_id );
							$_product = wc_get_product( $product_id );
							$regular_price = $_product->get_regular_price();
							$sale_price = $_product->get_sale_price();
							$price = $_product->get_price();
							$short_description = wp_strip_all_tags( $_product->get_description() );
							$items[] = array(
								'id'                => $products_by_sorting->ID,
								'title'             => $products_by_sorting->post_title,
								'image'             => $image,
								'price'             => $_product->get_price(),
								'regular_price'     => $_product->get_regular_price(),
								'sale_price'        => $sale_price,
								'short_description' => $short_description,
								'average_rating'    => $_product->get_average_rating(),
								'rating_count'      => $_product->get_rating_count(),
							);
						}
						return $items;
					}
				},
				'args'                => array(
					'number'  => array(),
					'order'   => array(
						'validate_callback' => function( $param, $request, $key ) {
							return is_string( $param );
						},
						'description'       => 'Order of the products like asc or desc',
					),
					'orderby' => array(

						'validate_callback' => function( $param, $request, $key ) {
							return is_string( $param );
						},
						'description'       => 'Order by the products like latest, price, rating or popularity',
					),
				),
				'permission_callback' => function() {
					return true;
				},

			)
		);
	}
}
$ewpapi_products_by_sorting = new Ewpapi_All_Products_By_Sorting_REST_Controller();