WDS - disable dates until 1st June when specific products are in cart

functions.php

<?php // Dont add this link to functions.php
/**
 * Iconic WDS - Disable all dates for specific product.
 *
 * @param array  $available_dates Available dates.
 * @param string $format          Date format.
 * @param bool   $ignore_slots    Ignore slots.
 *
 * @return array
 */
function iconic_wds_disable_all_dates_for_specific_product( $available_dates, $format, $ignore_slots ) {
	if ( 'array' === $format || empty( WC()->cart ) ) {
		return $available_dates;
	}

	// Todo: add list of product IDs in this array.
	$for_products = array( 10 );

	// Check if any of the $for_products products are in the cart.
	$has_product = false;
	foreach ( WC()->cart->get_cart() as $cart_item_key => $cart_item ) {
		$product = $cart_item['data'];

		if ( in_array( $product->get_id(), $for_products ) ) {
			$has_product = true;
			break;
		}
	}

	if ( ! $has_product ) {
		return $available_dates;
	}

	// If $for_products products are in the cart, remove dates before 1st March.
	$filtered_dates = array();
	foreach ( $available_dates as $date ) {
		$date_obj    = DateTime::createFromFormat( $format, $date );
		$first_march = DateTime::createFromFormat( 'Ymd', '20240601' );

		if ( $date_obj >= $first_march ) {
			$filtered_dates[] = $date;
		}
	}

	return $filtered_dates;
}
add_filter( 'iconic_wds_available_dates', 'iconic_wds_disable_all_dates_for_specific_product', 10, 3 );