Auto apply or remove a coupon in Woocommerce cart for a specific product id

Question

I am applying automatically a coupon when there is a product id 1362 in the cart, but when someone adds another product and delete the 1362 the coupon stays applied, how to prev

Answer 1

Here is the way to make it work when:

• adding a specific coupon code when a specific product is added to cart
• removing a specific applied coupon code when a specific product is removed from cart
• (in both cases you can display a custom notice)…

The code:

add_action( 'woocommerce_before_calculate_totals', 'auto_add_remove_coupon' );
function auto_add_remove_coupon( $cart ) {
    if ( is_admin() && ! defined( 'DOING_AJAX' ) )
        return;

    if ( did_action( 'woocommerce_before_calculate_totals' ) >= 2 )
        return;

    $coupon_code = 'boxpersonnalisable';
    $targeted_product_ids = array( 1362 );
    $found = false;

    // Loop through cart items
    foreach ( $cart->get_cart() as $cart_item ){
        if( in_array( $cart_item['product_id'], $targeted_product_ids ) ){
            $found = true;
            break;
        }
    }

    if ( ! $cart->has_discount( $coupon_code ) && $found ) {
        $cart->add_discount( $coupon_code );
        wc_clear_notices();
        wc_add_notice( __("Your custom notice - coupon added (optional)","woocommerce"), 'notice');
    } elseif  ( $cart->has_discount( $coupon_code ) && ! $found ) {
        $cart->remove_coupon( $coupon_code );
        wc_clear_notices();
        wc_add_notice( __("Your custom notice - coupon removed (optional)","woocommerce"), 'notice');
    }
}

Code goes in function.php file of your active child theme (or active theme). Tested and works