Iconic WDS - Disable day fee for local pickup.

functions.php

<?php
/**
 * Iconic WDS - Disable day fee for local pickup.
 *
 * @return void
 */
function disable_day_fee_for_local_pickup() {
	global $iconic_wds;

	if ( ! isset( $iconic_wds ) ) {
		return;
	}

	$chosen_delivery_method = $iconic_wds->get_chosen_shipping_method();
	if ( empty( $_POST['post_data'] ) ) {
		return;
	}

	$post_data = $_POST['post_data'];
	$posted_data = array();
	parse_str( $post_data, $posted_data );

	$chosen_date_ymd = $posted_data['jckwds-delivery-date-ymd'];
	$today_ymd = wp_date( 'Ymd' );

	if ( str_contains( $chosen_delivery_method, 'local_pickup' ) && $chosen_date_ymd === $today_ymd ) {
		WC()->session->set( 'jckwds_same_day_fee', 0 );
		WC()->session->set( 'jckwds_day_fee', 0 );
	}
}
add_action( 'woocommerce_cart_calculate_fees', 'disable_day_fee_for_local_pickup', 9 );