Dave Changes - Ticket 46398

functions.php

<?php

function custom_change_cart_meta( $cart ) {

	if ( is_admin() && ! defined( 'DOING_AJAX' ) )
		return;
	
	if ( did_action( 'woocommerce_before_calculate_totals' ) >= 2 )
		return;

	// Only for a DEFINED coupon code ( to be set below )
	$coupon_code   = '';
	$discount_type = '';
	$coupon_amount = 1;
	$is_coupon     = 0;
	$update_cart   = false;
	$cart_content  = $cart->cart_contents;

	if ( count( $cart->get_applied_coupons() ) > 0 ) {
		$is_coupon     = 1;
		$coupon        = $cart->get_applied_coupons();
		$coupon_code   = new WC_Coupon($coupon[0]); //percent, fixed_product, fixed_cart
		$discount_type = $coupon_code->get_discount_type();
		$coupon_amount = $coupon_code->get_amount();
	}

	foreach( $cart->get_cart() as $cart_item_key => $cart_item ) {
		$booking_settings = get_post_meta( $cart_item['product_id'], 'woocommerce_booking_settings', true ); // Adjust price if addons are set
		if ( isset( $cart_item['bkap_booking'] ) ) {
			foreach ( $cart_item['bkap_booking'] as $key => $addon ) {
				if ( isset( $booking_settings['booking_partial_payment_radio'] ) && 'percent' === $booking_settings[ 'booking_partial_payment_radio' ] ) {
					if ( 'percent' === $discount_type /* && $cart_item['line_total'] != $addon[ 'Deposit' ] */ && $is_coupon > 0 ) {

						$addon['Deposit']                = $addon['default_Deposit'] - ( $addon['default_Deposit'] * ( $coupon_amount / 100 ) );
						$addon['Total']                  = $addon['default_Total'] - ( $addon['default_Deposit'] - $addon['Deposit'] );
						$addon['bkap_coupon_applied']    = true;
						$cart_item['bkap_booking'][$key] = $addon;
						$update_cart                     = true;
					} elseif ( 0 === $is_coupon && isset($addon['bkap_coupon_applied'] ) && true === $addon['bkap_coupon_applied'] ) {
						$addon['Deposit']                = $addon['default_Deposit'];
						$addon['Total']                  = $addon['default_Total'];
						$addon['Remaining']              = $addon['default_Remaining'];
						$addon['bkap_coupon_applied']    = false;
						$cart_item['bkap_booking'][$key] = $addon;
						$update_cart                     = true;
					}
				}
			}
			$cart_content[$cart_item_key] = $cart_item;
		}
	}
	if ( $update_cart ) {
		$cart->set_cart_contents($cart_content);
		$cart->calculate_totals();
	}
}
add_action( 'woocommerce_before_calculate_totals', 'custom_change_cart_meta', 110, 1 );