gruene-seele/dev/partnercenter-api/admin/post-list.php

<?php
/*
 * Add to Post List Class
 */

if (! defined('ABSPATH')) {
    exit;
}

class PARTNERCENTER_API_Order_Post_List_Class
{
    /**
     * PARTNERCENTER_API_Order_Post_List_Class constructor.
     */
    public function __construct()
    {

        // Add custom column
        add_filter('manage_edit-shop_order_columns', [$this, 'manage_edit_shop_order_columns'], 20);

        // Fill the column
        add_action('manage_shop_order_posts_custom_column', [
            $this,
            'manage_shop_order_posts_custom_column',
        ], 20, 2);

        // Style custom column
        add_action('admin_print_styles', [$this, 'admin_print_styles'], 20);

    }

    /**
     * Add custom column.
     *
     *
     * @return array
     *
     * @since 1.0.0
     */
    public function manage_edit_shop_order_columns(array $columns)
    {

        $new_columns = [];

        foreach ($columns as $column_name => $column_info) {

            $new_columns[$column_name] = $column_info;

            if ($column_name === 'order_status') {
                $new_columns['partnercenter-status'] = __('PARTNERCENTER Status', 'partnercenter-api');
            }
        }

        return $new_columns;
    }

    /**
     * Add content to custom column.
     *
     * @param  int  $order_id
     *
     * @since 1.0.0
     */
    public function manage_shop_order_posts_custom_column(string $column, $order_id)
    {

        // Check if our column is worked on
        if ($column !== 'partnercenter-status') {
            return;
        }

        // Check if order was send to PARTNERCENTER
        $forwarded = intval(get_post_meta($order_id, '_partnercenter_api_order_fulfillment_forwarded', true));
        if ($forwarded === 0) {
            return;
        }

        // Display the status from DB?>
		<?php
        switch (get_post_meta($order_id, '_partnercenter_api_order_status', true)) {
            case 'free':
                break;
            case 'sent':
            case 'close': ?>
				<div class="partnercenter-status-circle green"></div>
				<?php
                break;
            case 'open':
            case 'process': ?>
				<div class="partnercenter-status-circle orange"></div>
				<?php
                break;
            default: ?>
				<span style="font-size: 200%">
					<?php _e('⚠️', 'partnercenter-api'); ?>
				</span>
				<?php break;
        } ?>

	<?php }

    /**
     * Style custom column.
     */
    public function admin_print_styles()
    {

        // Get the screen
        if (get_current_screen()->id !== 'edit-shop_order') {
            return;
        } ?>

		<style type="text/css">
			th.column-partnercenter-status {
				text-align: center;
			}

			.partnercenter-status-circle {
				width:         25px;
				height:        25px;
				border-radius: 100%;
				background:    darkorange;
				margin:        0 auto;
			}

			.partnercenter-status-circle.green {
				background: limegreen;
			}

		</style>

	<?php }
    }

new PARTNERCENTER_API_Order_Post_List_Class;