ShippingMethodInstanceStrategy.php

<?php

namespace WPDesk\ShowDecision\WooCommerce;

use WPDesk\ShowDecision\ShouldShowStrategy;

class ShippingMethodInstanceStrategy implements ShouldShowStrategy
{

	private \WC_Shipping_Zones $shipping_zones;

    private string $method_id;

	public function __construct(\WC_Shipping_Zones $shipping_zones, string $method_id)
	{
		$this->shipping_zones = $shipping_zones;
		$this->method_id = $method_id;
	}

	public function shouldDisplay(): bool
	{
		if ($this->isInShippingSettings()) {
			if (isset($_GET['instance_id'])) {
				$shipping_method = $this->shipping_zones::get_shipping_method(sanitize_key($_GET['instance_id']));
				if ($shipping_method instanceof \WC_Shipping_Method) {
					return $shipping_method->id === $this->method_id;
				}
			}
		}
		return false;
	}

	private function isInShippingSettings() : bool
	{
		if ($this->isGetParameterWithValue('page', 'wc-settings') && $this->isGetParameterWithValue('tab', 'shipping')) {
			return \true;
		}
		return \false;
	}

	private function isGetParameterWithValue(string $parameter, string $value) : bool
	{
		return isset($_GET[$parameter]) && $_GET[$parameter] === $value;
	}

}