Rewrites the price for an WooCommerce product if it contains a Comparison Set setting the highest price found in the Comparison Set to the "Regular" price and setting the lowest sale price found in the Comparison Set to the "Sale" price. [datafeedr][dfrcs]

change_product_price_to_reflect_prices_in_compset.php

<?php

/**
 * Rewrites the price for an WooCommerce product if it contains a Comparison Set setting the
 * highest price found in the Comparison Set to the "Regular" price of the product and setting 
 * the lowest sale price found in the Comparison Set to the "Sale" price of the product.
 *
 * This only works for a product which already has a Comparison Set. It does not
 * work if the product has never had a Comparison Set created for it.
 *
 * @param string $price HTML of formatted price.
 * @param WC_Product $product
 *
 * @return string Updated HTML.
 */
function mycode_change_product_price_to_reflect_prices_in_compset( $price, $product ) {

	// Get the compset for this $product.
	$source            = dfrcs_wc_get_source_of_product( $product );
	$source['context'] = 'wc_product_price_element';
	$compset           = new Dfrcs( $source );

	if ( ! $compset->cached ) {
		return $price;
	}

	if ( empty( $compset->lowest_priced_product ) || empty( $compset->highest_priced_product ) ) {
		return $price;
	}

	$regular_price = $compset->highest_priced_product['price'];
	$sale_price    = $compset->lowest_priced_product['finalprice'];

	if ( $sale_price >= $regular_price ) {
		return wc_price(
			dfrapi_int_to_price( $sale_price ),
			array( 'currency' => $compset->lowest_priced_product['currency'] )
		);
	}

	$currency = dfrcs_currency( $compset->lowest_priced_product );

	$regular_price = $currency . dfrapi_int_to_price( $regular_price );
	$sale_price    = $currency . dfrapi_int_to_price( $sale_price );

	return wc_format_sale_price( $regular_price, $sale_price );
}

add_filter( 'woocommerce_get_price_html', 'mycode_change_product_price_to_reflect_prices_in_compset', 20, 2 );