Check for new customers in WooCommerce Order received (Thankyou) page - php

Question

I am trying to show a custom message to new all customer (not returning customer) in Thankyou page and I am using "Checking if customer has already bought something in WooCommerce" answer code.
The issue is that can't detect if a customer has bought before. For example if I use the current code in thank You page the new customer become older customer.
SO my question is: How can I check if a customer bought earlier any product not in the current order?
Here is my code attempt, that doesn't work as it should:
function has_bought_before( $user_id = 0 ) {
global $wpdb;
$customer_id = $user_id == 0 ? get_current_user_id() : $user_id;
$paid_order_statuses = array_map( 'esc_sql', wc_get_is_paid_statuses() );
$results = $wpdb->get_col( "
SELECT p.ID FROM {$wpdb->prefix}posts AS p
INNER JOIN {$wpdb->prefix}postmeta AS pm ON p.ID = pm.post_id
WHERE p.post_status IN ( 'wc-" . implode( "','wc-", $paid_order_statuses ) . "' )
AND p.post_type LIKE 'shop_order'
AND pm.meta_key = '_customer_user'
AND pm.meta_value = $customer_id
" );
// Count number of orders and return a boolean value depending if higher than 0
return count( $results ) > 0 ? true : false;
}
add_filter('woocommerce_thankyou_order_received_text', 'woo_change_order_received_text', 10, 2 );
function woo_change_order_received_text( $str, $order ) {
if( has_bought_before() ){
$new_str = $str . ' Welcome Back Again.';
}else{
$new_str = $str . ' Welcome To our site You will get 10% discount on your next order.';
}
return $new_str;
}

Answer 1

On thankyou page you are targeting the next paid order, so you need to make a little change in the conditional function has_bought_before(), at the end, replacing the line:
return count( $results ) > 0 ? true : false;
by:
return count( $results ) > 1 ? true : false;
It should be working as you expect now.
May be rename this conditional function thankyou_has_bought_before().