installed plugin Easy Digital Downloads version 3.1.0.3

wp-content/plugins/easy-digital-downloads/includes/refund-functions.php

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+<?php
+/**
+ * Refund Functions
+ *
+ * This file contains functions related to refunds.
+ *
+ * @package     EDD
+ * @subpackage  Functions
+ * @copyright   Copyright (c) 2018, Easy Digital Downloads, LLC
+ * @license     http://opensource.org/licenses/gpl-2.0.php GNU Public License
+ * @since       3.0
+ */
+
+// Exit if accessed directly
+defined( 'ABSPATH' ) || exit;
+
+/**
+ * Return array of refundability types.
+ *
+ * @since 3.0
+ *
+ * @return array
+ */
+function edd_get_refundability_types() {
+	return array(
+		'refundable'    => __( 'Refundable',     'easy-digital-downloads' ),
+		'nonrefundable' => __( 'Non-Refundable', 'easy-digital-downloads' )
+	);
+}
+
+/**
+ * Calculate refund date.
+ *
+ * @since 3.0
+ *
+ * @param string $date        Date order was completed (Accepts UTC).
+ * @param int    $download_id Download ID.
+ *
+ * @return string|false Date refundable (in UTC), false otherwise.
+ */
+function edd_get_refund_date( $date = '', $download_id = 0 ) {
+
+	// Bail if no date was passed.
+	if ( empty( $date ) ) {
+		return false;
+	}
+
+	$refund_window = absint( edd_get_option( 'refund_window', 30 ) );
+
+	// Refund window is infinite.
+	if ( 0 === $refund_window ) {
+		return false;
+	}
+
+	if ( ! empty( $download_id ) ) {
+		$refund_window = edd_get_download_refund_window( $download_id );
+
+		$date_refundable = \Carbon\Carbon::parse( $date, 'UTC' )->addDays( $refund_window );
+	} else {
+		$date_refundable = \Carbon\Carbon::parse( $date, 'UTC' )->addDays( $refund_window );
+	}
+
+	return $date_refundable->toDateTimeString();
+}