Auto apply coupon based on custom user_meta in Woocommerce - php

Question

First post here so be gentle. I have done my usual searching and testing but I am stumped.
Anyways here is my code that I am trying to use. I need to apply a coupon code that takes 2% off all orders if the user belongs to a certain buying group which is in their profile.
The coupon also does an exclude on one category at the moment so I don't know exactly how that factors in when automatically applying a code.
Does it just follow the restrictions for the coupon?
add_action( 'woocommerce_before_cart', 'anla_apply_buying_group_discount_coupon' );
function anla_apply_buying_group_discount_coupon() {
global $woocommerce;
global $current_user;
$user_id = get_current_user_id();
$maybe_has_buying_group_discount = get_user_meta( $user_id, 'has_buying_group_discount', true );
if ( '1' === $maybe_has_buying_group_discount ) {
return true;
}
elseif ( '0' === $maybe_has_buying_group_discount ) {
return false;
}
if ($maybe_has_buying_group_discount == true ) {
$woocommerce->cart->add_discount( 'buying group discount (2%)' );
}
elseif ($maybe_has_buying_group_discount == false ) {
$woocommerce->cart->remove_discount( 'buying group discount (2%)' );
$woocommerce->cart->calculate_totals();
}
}
Any help is appreciated.

Answer 1

There are some errors and deprecated methods in your code. The hook that you are using is not the right one. Instead try the following with additional notice messages:
add_action( 'woocommerce_before_calculate_totals', 'apply_group_discount_coupon', 20, 1 );
function apply_group_discount_coupon( $cart ) {
if ( is_admin() && ! defined( 'DOING_AJAX' ) )
return;
if ( did_action( 'woocommerce_before_calculate_totals' ) >= 2 )
return;
// HERE set your coupon code
$coupon_name = "buying group discount (2%)";
$user_id = get_current_user_id();
$discount_enabled = get_user_meta( $user_id, 'has_buying_group_discount', true );
$coupon_code = sanitize_title( $coupon_name );
if ( $discount_enabled && ! $cart->has_discount( $coupon_code ) ){
$cart->apply_coupon( $coupon_code );
$message = __("You have 2% of discount as Premium user group", 'woocommerce');
} elseif ( ! $discount_enabled && $cart->has_discount( $coupon_code ) ) {
$cart->remove_coupon( $coupon_code );
$message = __("You can't get a discount as Premium user group", 'woocommerce');
} else
return;
// Display a custom notice
if( isset($message) ){
wc_clear_notices();
wc_add_notice( $message, 'notice');
}
}
Code goes in function.php file of your active child theme (or active theme). Tested and works.
The version without message:
add_action( 'woocommerce_before_calculate_totals', 'apply_group_discount_coupon', 20, 1 );
function apply_group_discount_coupon( $cart ) {
if ( is_admin() && ! defined( 'DOING_AJAX' ) )
return;
// HERE set your coupon code
$coupon_name = "buying group discount (2%)";
$user_id = get_current_user_id();
$discount_enabled = get_user_meta( $user_id, 'has_buying_group_discount', true );
$coupon_code = sanitize_title( $coupon_name );
if ( $discount_enabled && ! $cart->has_discount( $coupon_code ) )
$cart->apply_coupon( $coupon_code );
elseif ( ! $discount_enabled && $cart->has_discount( $coupon_code ) ) {
$cart->remove_coupon( $coupon_code );
else
return;
}