Resend programmatically a WooCommerce customer_on_hold_order email notification - php

Question

I noticed that the customer on hold order email is not available so i tried to replace the actions with a single action that would send the appropriate email.
This seems to work except for the on-hold status. I dont see what the difference is between the on-hold and processing case other than its not in the $available_emails in class-wc-meta-box-order-actions.php and I have removed all the others and they still work.
What I am doing wrong? Is it a way to make this possible?
My code is:
function ulmh_resend1( $actions ) {
$actions['ulmh_resend'] = __( 'Resend Email', 'text_domain' );
return $actions;
}
function ulmh_resend2( $order ) {
$mailer = WC()->mailer();
$mails = $mailer->get_emails();
if ($order->has_status( 'on-hold' )) {
$eml = 'customer_on_hold_order';
}elseif ($order->has_status( 'processing' )) {
$eml = 'customer_processing_order';
}elseif ($order->has_status( 'completed' )) {
$eml = 'customer_completed_order';
} else {
$eml = "nothing";
}
if ( ! empty( $mails ) ) {
foreach ( $mails as $mail ) {
if ( $mail->id == eml ) {
$mail->trigger( $order->id );
}
}
}
}
function ulmh_resend3( $order_emails ) {
$remove = array( 'new_order', 'cancelled_order', 'customer_processing_order', 'customer_completed_order', 'customer_invoice' );
$order_emails = array_diff( $order_emails, $remove );
return $order_emails;
}
add_action( 'woocommerce_order_actions', 'ulmh_resend1' );
add_action( 'woocommerce_order_action_ulmh_resend', 'ulmh_resend2' );
add_filter( 'woocommerce_resend_order_emails_available', 'ulmh_resend3' );

Answer 1

I have revisited and compacted your code because there where some errors like a typo error in if ( $mail->id == eml ){ for eml as a variable name… Also to get the Order ID from the WC_Order object you should use $order->get_id() method instead of $order->id.
Here is this new functional code:
add_action( 'woocommerce_order_actions', 'ulmh_resend1' );
function ulmh_resend1( $actions ) {
$actions['ulmh_resend'] = __( 'Resend Email', 'text_domain' );
return $actions;
}
add_action( 'woocommerce_order_action_ulmh_resend', 'ulmh_resend2' );
function ulmh_resend2( $order ) {
$wc_emails = WC()->mailer()->get_emails();
if( empty( $wc_emails ) ) return;
if ($order->has_status( 'on-hold' ))
$email_id = 'customer_on_hold_order';
elseif ($order->has_status( 'processing' ))
$email_id = 'customer_processing_order';
elseif ($order->has_status( 'completed' ))
$email_id = 'customer_completed_order';
else
$email_id = "nothing";
foreach ( $wc_emails as $wc_mail )
if ( $wc_mail->id == $email_id )
$wc_mail->trigger( $order->get_id() );
}
add_filter( 'woocommerce_resend_order_emails_available', 'ulmh_resend3' );
function ulmh_resend3( $order_emails ) {
$remove = array( 'new_order', 'cancelled_order', 'customer_processing_order', 'customer_completed_order', 'customer_invoice' );
$order_emails = array_diff( $order_emails, $remove );
return $order_emails;
}
Code goes in function.php file of your active child theme (or theme) or also in any plugin file.
This code is tested in WooCommerce 3+ and works fine now for on-hold order status email notifications, when resending