Send Email To Customer When Order Download Limit Changes

Hi,

Before moving forward, can you provide us with more details, please? Is the site using any plugin to manage order download limits?

We can get a better idea by checking the system status report on your site. Can you please share a copy of your site’s System Status Report? You can find it via WooCommerce > Status. Select “Get system report” and then “Copy for support”.?

Possible Solution:

function mail_to_customer_on_downloads_remaining_change ( $post_id, $post_data )
{

    if ( ( defined( 'DOING_AUTOSAVE' ) && DOING_AUTOSAVE ) || $post_data["post_type"] != "shop_order" )
    {
        return;
    }

    global $wpdb;

    $downloads_remaining_db = $wpdb->get_results( "SELECT downloads_remaining FROM {$wpdb->prefix}woocommerce_downloadable_product_permissions WHERE order_id = $post_id", ARRAY_A );
    $downloads_remaining_post = $_POST["downloads_remaining"];

    for ( $i=0; $i < count($downloads_remaining_db); $i++ )
    {

        if ( !in_array($downloads_remaining_db[$i]["downloads_remaining"], $downloads_remaining_post) )
        {

            $old_text = esc_html( 'We have finished processing your order.', 'woocommerce' );
            $new_text = 'we have reset the download limits in your order. You can now download the files again:';

            $order = wc_get_order( $post_id );

            $order_id  = $order->get_id();
            $billing_email  = $order->get_billing_email();

            $mailer = WC()->mailer();

            $recipient = $billing_email;
            $subject = 'Download limits in your order #' . $order_id . ' changed';
            $content = wc_get_template_html( 'emails/customer-completed-order.php', array(
                    'order'         => $order,
                    'email_heading' => 'Order #' . $order_id,
                    'sent_to_admin' => false,
                    'plain_text'    => false,
                    'email'         => $mailer
                ) );
            $content = str_replace( $old_text, $new_text, $content);
            $headers = "Content-Type: text/html\r\n";

            $mailer->send( $recipient, $subject, $content, $headers );

            return;

        }

    }

}

add_action( 'pre_post_update', 'mail_to_customer_on_downloads_remaining_change', 10, 2 );