WDS - disable certain timeslot for specific products

function.php

<?php
/**
 * Iconic WDS: Disable timeslots for products in cart.
 */
function iconic_wds_disable_timeslots_for_products( $timeslots ) {
	// These timeslots will be disabled for the given product IDs.
	// 	How to get the timeslot ID: https://www.loom.com/share/96bd5674116e416e933eb932742adf7b
	// Todo - update this map with the actual timeslots and products.
	$disable_timeslots_product_map = array(
		// Example: timeslot_id => [product_id1, product_id2, ...]
		'68a6b8b3d2890' => array(
			120
		),
	);

	$timeslots_to_disable = array();

	foreach ( $disable_timeslots_product_map as $timeslot_id => $product_ids ) {
		if ( iconic_wds_are_products_in_cart( $product_ids ) ) {
			$timeslots_to_disable[] = $timeslot_id;
		}
	}

	foreach ( $timeslots_to_disable as $timeslot_id ) {
		foreach ( $timeslots as $key => $timeslot ) {
			if ( str_contains( $timeslot_id, $timeslot['id'] ) ) {
				unset( $timeslots[ $key ] );
			}
		}
	}

	return $timeslots;
}
add_filter( 'iconic_wds_timeslots', 'iconic_wds_disable_timeslots_for_products' );

function iconic_wds_are_products_in_cart( $product_ids ) {
	if ( ! function_exists( 'WC' ) || ! WC()->cart ) {
		return false;
	}

	if ( empty( $product_ids ) ) {
		return false;
	}

	$cart = WC()->cart->get_cart();

	if ( empty( $cart ) ) {
		return false;
	}

	foreach ( (array) $product_ids as $product_id ) {
		foreach ( $cart as $cart_item ) {
			$product       = isset( $cart_item['data'] ) ? $cart_item['data'] : null;
			$in_cart_ids   = array(
				isset( $cart_item['product_id'] ) ? (int) $cart_item['product_id'] : 0,
				isset( $cart_item['variation_id'] ) ? (int) $cart_item['variation_id'] : 0,
				( $product && method_exists( $product, 'get_parent_id' ) ) ? (int) $product->get_parent_id() : 0,
			);

			if ( in_array( (int) $product_id, $in_cart_ids, true ) ) {
				return true; // any match is enough
			}
		}
	}

	return false;
}