Helper.php

<?php
/**
 * Paytrail for WooCommerce payment Helper class
 */

namespace Paytrail\WooCommercePaymentGateway;

use Exception;
use LogicException;

class Helper {

	/**
	 * Check is subscriptions enabled
	 *
	 * @return bool
	 */
	public static function getIsSubscriptionsEnabled() {
		if (!class_exists('WC_Subscriptions_Cart')) {
			return false;
		}
		if (!class_exists('WC_Subscriptions_Change_Payment_Gateway')) {
			return false;
		}
		if (!function_exists('wcs_cart_contains_renewal')) {
			return false;
		}
		if (class_exists('\WC_Subscriptions_Admin')) {
			$accept_manual_renewals = ( 'no' !== get_option(\WC_Subscriptions_Admin::$option_prefix . '_accept_manual_renewals', 'no') );
			if (true == $accept_manual_renewals) {
				return false;
			}
		}

		return (
			\WC_Subscriptions_Cart::cart_contains_subscription() ||
			wcs_cart_contains_renewal() ||
			filter_input(INPUT_GET, 'change_payment_method')
		);
	}

	public static function getIsChangeSubscriptionPaymentMethod() {
		return filter_input(INPUT_GET, 'change_payment_method');
	}

	/**
	 * Currency specific formatting
	 *
	 * @param int|double $sum The sum to format.
	 * @return integer
	 */
	public function handle_currency( $sum) {
		return round($sum*100);
	}

	/**
	 * Get current WooCommerce cart total.
	 *
	 * @return integer
	 */
	public function get_cart_total() {
		$sum = WC()->cart->total;

		return $this->handle_currency($sum);
	}

	public static function getLocale() {
		$full_locale = get_locale();

		$short_locale = substr($full_locale, 0, 2);

		// Get and assign the WordPress locale
		switch ($short_locale) {
			case 'sv':
				$locale = 'SV';
				break;
			case 'fi':
				$locale = 'FI';
				break;
			default:
				$locale = 'EN';
				break;
		}
		return $locale;
	}

}