Woocommerce update order value after updating cart discount - woocommerce

Question

I want to add maximum discount limit on % discount coupons. I've added this code to do so in cart, but payment gateway is still getting the % discount without the maximum limit set by this code. Will I have to update any other value to fix this?
Payment gateway plugging is getting the total using get_total method.
add_action( 'woocommerce_coupon_options_usage_limit', 'woocommerce_coupon_options_usage_limit', 10, 2 );
function woocommerce_coupon_options_usage_limit( $coupon_id, $coupon )
{
echo '';
// max discount per coupons
$max_discount = get_post_meta( $coupon_id, '_max_discount', true );
woocommerce_wp_text_input( array(
'id' => 'max_discount',
'label' => __( 'Usage max discount', 'woocommerce' ),
'placeholder' => esc_attr( $max_discount, 'woocommerce' ),
'description' => __( 'The maximum discount this coupon can give.', 'woocommerce' ),
'type' => 'number',
'desc_tip' => true,
'class' => 'short',
'custom_attributes' => array(
'step' => 1,
'min' => 0,
),
'value' => $max_discount ? $max_discount : '',
) );
echo '';
}
add_action( 'woocommerce_coupon_options_save', 'woocommerce_coupon_options_save', 10, 2 );
function woocommerce_coupon_options_save( $coupon_id, $coupon ) {
update_post_meta( $coupon_id, '_max_discount', wc_format_decimal( $_POST['max_discount'] ) );
}
// filter to change discount if over max coupon amount
function filter_woocommerce_coupon_get_discount_amount( $discount, $discounting_amount, $cart_item, $single, $instance ) {
$cartCoupons = WC()->cart->get_applied_coupons();
foreach ($cartCoupons as $key => $appliedCoupon) {
$coupon = new WC_Coupon($appliedCoupon);
$couponType = get_post_meta( $coupon->get_id(), 'discount_type', true );
if ($couponType == 'percent') {
$maxCouponAmount = get_post_meta( $coupon->get_id(), '_max_discount', true );
$excludedProducts = explode(",", get_post_meta( $coupon->get_id(), 'exclude_product_ids', true ));
$cartLines = count(WC()->cart->get_cart());
$cartLineItems = WC()->cart->get_cart();
foreach ($cartLineItems as $cartItem){
$cartProductID[] = $cartItem['product_id'];
if (!empty($excludedProducts)) {
$cartLinesWithoutExcluded = array_intersect($cartProductID,$excludedProducts);
} else {
$cartLinesWithoutExcluded = $cartProductID;
}
$cartLinesWithoutExcluded = count($cartLinesWithoutExcluded);
$totalCartItems = $cartLines - $cartLinesWithoutExcluded;
$discount = $maxCouponAmount / $totalCartItems;
}
} else {
$discount = 0.00;
}
return $discount;
}
}
// apply the coupon whether it is max discount or a product price adjustment
function apply_max_amount_or_product_price_adjustment(){
if ( is_admin() && ! defined( 'DOING_AJAX' ) )
return;
if ( did_action( 'woocommerce_before_calculate_totals' ) >= 2 )
return;
if ( !is_admin() && !wp_is_json_request() ) {
global $wp, $woocommerce, $post;
$cartCoupons = WC()->cart->get_applied_coupons();
foreach ($cartCoupons as $key => $appliedCoupon) {
$coupon = new WC_Coupon($appliedCoupon);
$maxCouponAmount = get_post_meta( $coupon->get_id(), '_max_discount', true );
$excludedProducts = explode(",", get_post_meta( $coupon->get_id(), 'exclude_product_ids', true ));
$couponType = get_post_meta( $coupon->get_id(), 'discount_type', true );
// $fixedProductPrice = get_post_meta( $coupon->get_id(), '_adjust_price', true );
$couponAmount = WC()->cart->get_coupon_discount_amount( $appliedCoupon );
if (!empty($maxCouponAmount) && $couponType == 'percent' && ($couponAmount >= $maxCouponAmount)) {
$couponAmount = add_filter( 'woocommerce_coupon_get_discount_amount', 'filter_woocommerce_coupon_get_discount_amount', 10, 5 );
}
if ($couponType == 'fixed_cart') {
$cart = WC()->cart->get_cart();
$couponProducts = explode(',',get_post_meta( $coupon->get_id(), 'product_ids', true ));
$fixedPricePerProduct = get_post_meta( $coupon->get_id(), '_price_per_product_amt', true );
foreach( $cart as $cart_item ) {
if (in_array($cart_item['data']->get_parent_id(), $couponProducts)) {
$cart_item['data']->set_price( $fixedPricePerProduct );
}
}
}
}
}
}
add_action('woocommerce_before_calculate_totals', 'apply_max_amount_or_product_price_adjustment', 10, 1);

Answer 1

add_action('woocommerce_coupon_options_usage_limit', 'woocommerce_coupon_options_usage_limit', 10, 2);
function woocommerce_coupon_options_usage_limit($coupon_id, $coupon)
{
echo '';
// max discount per coupons
$max_discount = get_post_meta($coupon_id, '_max_discount', true);
woocommerce_wp_text_input(array(
'id' => 'max_discount',
'label' => __('Usage max discount', 'woocommerce'),
'placeholder' => esc_attr($max_discount, 'woocommerce'),
'description' => __('The maximum discount this coupon can give.', 'woocommerce'),
'type' => 'number',
'desc_tip' => true,
'class' => 'short',
'custom_attributes' => array(
'step' => 1,
'min' => 0,
),
'value' => $max_discount ? $max_discount : '',
));
echo '';
}
add_action('woocommerce_coupon_options_save', 'woocommerce_coupon_options_save', 10, 2);
function woocommerce_coupon_options_save($coupon_id, $coupon)
{
update_post_meta($coupon_id, '_max_discount', wc_format_decimal($_POST['max_discount']));
}
// filter to change discount if over max coupon amount
function filter_woocommerce_coupon_get_discount_amount($discount, $discounting_amount, $cart_item, $single, $instance)
{
$cartCoupons = WC()->cart->get_applied_coupons();
foreach ($cartCoupons as $key => $appliedCoupon) {
$coupon = new WC_Coupon($appliedCoupon);
$couponType = get_post_meta($coupon->get_id(), 'discount_type', true);
if ($couponType == 'percent') {
$maxCouponAmount = get_post_meta($coupon->get_id(), '_max_discount', true);
$excludedProducts = explode(",", get_post_meta($coupon->get_id(), 'exclude_product_ids', true));
$cartLines = count(WC()->cart->get_cart());
$cartLineItems = WC()->cart->get_cart();
foreach ($cartLineItems as $cartItem) {
$cartProductID[] = $cartItem['product_id'];
if (!empty($excludedProducts)) {
$cartLinesWithoutExcluded = array_intersect($cartProductID, $excludedProducts);
} else {
$cartLinesWithoutExcluded = $cartProductID;
}
$cartLinesWithoutExcluded = count($cartLinesWithoutExcluded);
$totalCartItems = $cartLines - $cartLinesWithoutExcluded;
$new_discount = $maxCouponAmount / $totalCartItems;
if ($new_discount < $discount) {
$discount = $new_discount;
}
}
} else {
$discount = 0.00;
}
return $discount;
}
}
// apply the coupon whether it is max discount or a product price adjustment
function apply_max_amount_or_product_price_adjustment()
{
if (is_admin() && !defined('DOING_AJAX'))
return;
if (did_action('woocommerce_before_calculate_totals') >= 2)
return;
if (!is_admin() && !wp_is_json_request()) {
global $wp, $woocommerce, $post;
$cartCoupons = WC()->cart->get_applied_coupons();
foreach ($cartCoupons as $key => $appliedCoupon) {
$coupon = new WC_Coupon($appliedCoupon);
$maxCouponAmount = get_post_meta($coupon->get_id(), '_max_discount', true);
$excludedProducts = explode(",", get_post_meta($coupon->get_id(), 'exclude_product_ids', true));
$couponType = get_post_meta($coupon->get_id(), 'discount_type', true);
// $fixedProductPrice = get_post_meta( $coupon->get_id(), '_adjust_price', true );
$couponAmount = WC()->cart->get_coupon_discount_amount($appliedCoupon);
if (!empty($maxCouponAmount) && $couponType == 'percent' && ($couponAmount >= $maxCouponAmount)) {
$couponAmount = add_filter('woocommerce_coupon_get_discount_amount', 'filter_woocommerce_coupon_get_discount_amount', 10, 5);
}
if ($couponType == 'fixed_cart') {
$cart = WC()->cart->get_cart();
$couponProducts = explode(',', get_post_meta($coupon->get_id(), 'product_ids', true));
$fixedPricePerProduct = get_post_meta($coupon->get_id(), '_price_per_product_amt', true);
foreach ($cart as $cart_item) {
if (in_array($cart_item['data']->get_parent_id(), $couponProducts)) {
$cart_item['data']->set_price($fixedPricePerProduct);
}
}
}
}
}
}
add_action('woocommerce_before_calculate_totals', 'apply_max_amount_or_product_price_adjustment', 10, 1);
add_filter('woocommerce_coupon_get_discount_amount', 'filter_woocommerce_coupon_get_discount_amount', 10, 5);