qdr.app.woo.plugins/studiou-wc-ord-print-statuses/includes/class-custom-columns-manager.php

<?php
// Manages custom columns in the WooCommerce orders list (HPOS and legacy).

defined('ABSPATH') || exit;

class Custom_Columns_Manager {
    public function __construct() {
        add_filter('manage_woocommerce_page_wc-orders_columns', array($this, 'add_custom_shop_order_column'));
        add_action('manage_woocommerce_page_wc-orders_custom_column', array($this, 'add_custom_shop_order_column_content'), 10, 2);
    }

    public function add_custom_shop_order_column($columns) {
        $new_columns = array();
        foreach ($columns as $column_name => $column_info) {
            $new_columns[$column_name] = $column_info;
            if ($column_name === 'order_total') {
                $new_columns['to_print_date']         = __('To Print Date', 'studiou-wc-ord-print-statuses');
                $new_columns['in_print_date']         = __('In Print Date', 'studiou-wc-ord-print-statuses');
                $new_columns['external_order_number'] = __('External Order Number', 'studiou-wc-ord-print-statuses');
            }
        }
        return $new_columns;
    }

    /**
     * Render cell content. Under HPOS WC passes the WC_Order object as the
     * second argument; under legacy CPT it passes the post ID. wc_get_order()
     * normalises both forms, so we accept either.
     */
    public function add_custom_shop_order_column_content($column, $order_or_id) {
        $order = wc_get_order($order_or_id);
        if (!$order) {
            echo '—';
            return;
        }
        switch ($column) {
            case 'to_print_date':
                echo $this->format_meta_date($order->get_meta('to_print_date'));
                break;
            case 'in_print_date':
                echo $this->format_meta_date($order->get_meta('in_print_date'));
                break;
            case 'external_order_number':
                $value = $order->get_meta('external_ref_ord_no');
                echo $value !== '' ? esc_html($value) : '—';
                break;
        }
    }

    private function format_meta_date($value) {
        if (empty($value)) {
            return '—';
        }
        $timestamp = strtotime($value);
        if (!$timestamp) {
            return '—';
        }
        return esc_html(date_i18n(get_option('date_format') . ' ' . get_option('time_format'), $timestamp));
    }
}