Easy Digital Downloads grandfathered renewal discounts, with support for upgrades and reactivations

edd-improved-grandfathered-renewal-discount.php

<?php 
/**
 * Sets renewal discount to 30% for any customer that purchased before January
 * 1, 2021.
 *
 * @param  int   $renewal_discount The renewal discount.
 * @param  int   $license_id       The license ID.
 * @return int   The renewal discount amount.
 */
function wpf_edd_grandfather_renewal_discount( $renewal_discount, $license_id ) {

	// During an upgrade or reactivation of an expired license, for some reason
	// $license_id is 0.

	if ( empty( $license_id ) ) {

		$cart_items = edd_get_cart_contents();

		if ( ! empty( $cart_items ) && ! empty( $cart_items[0]['options']['license_id'] ) ) {
			$license_id = $cart_items[0]['options']['license_id'];
		}
	}

	$license = edd_software_licensing()->get_license( $license_id );

	if ( ! is_object( $license ) ) {
		return $renewal_discount;
	}

	if ( ! empty( $license->date_created ) && strtotime( $license->date_created ) < strtotime( 'January 1, 2021' ) ) {
		$renewal_discount = 30;
	}

	return $renewal_discount;

}

add_filter( 'edd_sl_renewal_discount_percentage', 'wpf_edd_grandfather_renewal_discount', 10, 2 );