WooCommerce customized email only for processing and completed orders - php

Question

I am using a plugin to send custom referral codes in the email orders but now I found that every order email has the code inserted.
function gens_raf_customer_email( $order, $sent_to_admin, $plain_text ) {
$user_id = ( version_compare( WC_VERSION, '2.7', '<' ) ) ? $order->customer_user : $order->get_customer_id();
if( ! empty( $user_id ) && ( get_user_meta($user_id, "gens_referral_id", true) ) != '' ){
$code = get_user_meta($user_id, "gens_referral_id", true);
} else {
$code = ( version_compare( WC_VERSION, '2.7', '<' ) ) ? $order->billing_email : $order->get_billing_email();
}
if( $plain_text ){
_e('Your referral code is: ','gens-raf') . $code;
} else {
echo '<p style="text-align:center;margin-top:10px;">Your referral code is: ' .get_home_url() .'?raf='. $code . '</p>';
}
}
add_action('woocommerce_email_customer_details', 'gens_raf_customer_email', 30, 3 );
I was messing around with
if ( $email->id == 'customer_completed_order' )
But gave me error from the php code builder. The main issue is to send that email only to completed and/or processing orders instead of refunded, cancelled and so on.
Thank you!

Answer 1

You're getting the error because you didn't add the fourth $email argument available to the woocommerce_email_customer_details hook.
The content will only be displayed in the Completed order and
Processing order templates.
Try this:
add_action('woocommerce_email_customer_details', 'gens_raf_customer_email', 30, 4 );
function gens_raf_customer_email( $order, $sent_to_admin, $plain_text, $email ) {
if ( $email->id == 'customer_completed_order' || $email->id == 'customer_processing_order' ) {
$user_id = ( version_compare( WC_VERSION, '2.7', '<' ) ) ? $order->customer_user : $order->get_customer_id();
if( ! empty( $user_id ) && ( get_user_meta($user_id, "gens_referral_id", true) ) != '' ){
$code = get_user_meta($user_id, "gens_referral_id", true);
} else {
$code = ( version_compare( WC_VERSION, '2.7', '<' ) ) ? $order->billing_email : $order->get_billing_email();
}
if( $plain_text ){
_e('Your referral code is: ','gens-raf') . $code;
} else {
echo '<p style="text-align:center;margin-top:10px;">Your referral code is: ' .get_home_url() .'?raf='. $code . '</p>';
}
}
}
The code has been tested and works.

Answer 2

The variable $email is the 4th missing argument from your hooked function, that you need to target specific email notifications.
Use instead (for woocommerce 3 and above):
add_action('woocommerce_email_customer_details', 'gens_raf_customer_email', 100, 4 );
function gens_raf_customer_email( $order, $sent_to_admin, $plain_text, $email ) {
// Target specific notifications: Customer processing and completed orders
if ( in_array( $email->id, ['customer_processing_order', 'customer_completed_order'] ) ) {
$gens_raf = get_user_meta( $order->get_user_id(), "gens_referral_id", true );
$code = empty( $gens_raf ) ? $order->get_billing_email() : $gens_raf;
if( $plain_text ){
printf( __('Your referral code is: %s', 'gens-raf'), $code );
} else {
$output = sprintf( __("Your referral code is: %s", "gens-raf"), get_home_url() .'?raf='. $code );
echo '<p style="text-align:center;margin-top:10px;">' . $output . '</p>';
}
}
}
Code goes in functions.php file of the active child theme (or active theme). It should works.