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✏️ Editing: ShippingRateQuery.php

<?php
declare( strict_types=1 );

namespace Automattic\WooCommerce\GoogleListingsAndAds\DB\Query;

use Automattic\WooCommerce\GoogleListingsAndAds\DB\Query;
use Automattic\WooCommerce\GoogleListingsAndAds\DB\Table\ShippingRateTable;
use Automattic\WooCommerce\GoogleListingsAndAds\Exception\InvalidQuery;
use wpdb;

defined( 'ABSPATH' ) || exit;

/**
 * Class ShippingRateQuery
 *
 * @package Automattic\WooCommerce\GoogleListingsAndAds\DB\Query
 */
class ShippingRateQuery extends Query {

/**
	 * ShippingRateQuery constructor.
	 *
	 * @param wpdb              $wpdb
	 * @param ShippingRateTable $table
	 */
	public function __construct( wpdb $wpdb, ShippingRateTable $table ) {
		parent::__construct( $wpdb, $table );
	}

/**
	 * Sanitize a value for a given column before inserting it into the DB.
	 *
	 * @param string $column The column name.
	 * @param mixed  $value  The value to sanitize.
	 *
	 * @return mixed The sanitized value.
	 * @throws InvalidQuery When the code tries to set the ID column.
	 */
	protected function sanitize_value( string $column, $value ) {
		if ( 'id' === $column ) {
			throw InvalidQuery::cant_set_id( ShippingRateTable::class );
		}

if ( 'options' === $column ) {
			if ( ! is_array( $value ) ) {
				throw InvalidQuery::invalid_value( $column );
			}

$value = wp_json_encode( $value );
		}

return $value;
	}

/**
	 * Perform the query and save it to the results.
	 */
	protected function query_results() {
		parent::query_results();

$this->results = array_map(
			function ( $row ) {
				$row['options'] = ! empty( $row['options'] ) ? json_decode( $row['options'], true ) : $row['options'];

return $row;
			},
			$this->results
		);
	}

/**
	 * Retrieves all available shipping rates and organizes them by country.
	 *
	 * Fetches all shipping rate data using `get_results()`, processes it,
	 * and returns an associative array in a format suitable for JSON responses.
	 *
	 * @since 3.2.0
	 *
	 * @return array Associative array of shipping rates indexed by country codes.
	 *               Each entry contains:
	 *               - `country_code` (string): The country code.
	 *               - `currency` (string): The currency code.
	 *               - `free_shipping_threshold` (float | null): The minimum order amount required for free shipping.
	 *               - `rate` (string): The cost of shipping in the respective currency.
	 */
	public function get_all_shipping_rates() {
		$rates = $this->get_results();
		$items = [];
		foreach ( $rates as $rate ) {
			$data = [
				'country_code'            => $rate['country'],
				'currency'                => $rate['currency'],
				'free_shipping_threshold' => isset( $rate['options']['free_shipping_threshold'] ) ? (float) $rate['options']['free_shipping_threshold'] : null,
				'rate'                    => $rate['rate'],
			];

$items[ $rate['country'] ] = $data;
		}

return $items;
	}
}

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