AyeCode / invoicing

        // Large number that will never be reached

        $max_uses = wpinv_get_discount_max_uses( $code_id );

        // Should never be greater than, but just in case

        if ( $uses >= $max_uses && ! empty( $max_uses ) ) {

            // Discount is maxed out

            wpinv_set_error( 'wpinv-discount-error', __( 'This discount has reached its maximum usage.', 'invoicing' ) );

            $return = true;

        }

    }

    return apply_filters( 'wpinv_is_discount_maxed_out', $return, $code_id );

        $ret = true;

    }

    if( ! empty( $excluded_ps ) ) {

        // Check that there are items other than excluded ones in the cart

        if( $cart_ids == $excluded_ps ) {

            wpinv_set_error( 'wpinv-discount-error', __( 'This discount is not valid for the cart contents.', 'invoicing' ) );

            $ret = false;

        }

    }

    return (bool) apply_filters( 'wpinv_is_discount_item_req_met', $ret, $code_id, $condition );

}