Code-Snippets-Functions/Execute a function on a child site/WooCommerce/add-shipment-tracking.txt

class CWPAI_Shipping_Tracking {
    public function __construct() {
        add_action( 'add_meta_boxes', array( $this, 'add_metabox' ) );
        add_action( 'admin_footer', array( $this, 'add_js' ) );
        add_action( 'woocommerce_email_after_order_table', array( $this, 'add_tracking_info_to_email' ) );
        add_action( 'woocommerce_view_order', array( $this, 'add_tracking_info_to_order_page' ) );
    }
    
    public function add_metabox() {
        add_meta_box(
            'cwpai_shipping_tracking',
            __( 'Shipping Tracking', 'cwpai' ),
            array( $this, 'metabox_content' ),
            'shop_order',
            'side',
            'default'
        );
    }
    
    public function metabox_content() {
        global $post;
        $tracking_number = get_post_meta( $post->ID, '_cwpai_tracking_number', true );
        $carrier_name = get_post_meta( $post->ID, '_cwpai_carrier_name', true );
        ?>
        <p>
            <label for="cwpai_tracking_number"><?php _e( 'Tracking Number', 'cwpai' ); ?></label>
            <input type="text" name="cwpai_tracking_number" id="cwpai_tracking_number" value="<?php echo esc_attr( $tracking_number ); ?>" />
        </p>
        <p>
            <label for="cwpai_carrier_name"><?php _e( 'Carrier Name', 'cwpai' ); ?></label>
            <select name="cwpai_carrier_name" id="cwpai_carrier_name">
                <option value=""><?php _e( 'Select a carrier', 'cwpai' ); ?></option>
                <option value="fedex" <?php selected( $carrier_name, 'fedex' ); ?>><?php _e( 'FedEx', 'cwpai' ); ?></option>
                <option value="ups" <?php selected( $carrier_name, 'ups' ); ?>><?php _e( 'UPS', 'cwpai' ); ?></option>
                <option value="usps" <?php selected( $carrier_name, 'usps' ); ?>><?php _e( 'USPS', 'cwpai' ); ?></option>
                <option value="custom" <?php selected( $carrier_name, 'custom' ); ?>><?php _e( 'Custom', 'cwpai' ); ?></option>
            </select>
        </p>
        <?php
    }
    
    public function add_js() {
        global $post_type;
        if ( 'shop_order' !== $post_type ) {
            return;
        }
        ?>
        <script type="text/javascript">
            jQuery( function( $ ) {
                $( '#cwpai_carrier_name' ).select2();
            } );
        </script>
        <?php
    }
    
    public function add_tracking_info_to_email( $order ) {
        $tracking_number = get_post_meta( $order->get_id(), '_cwpai_tracking_number', true );
        $carrier_name = get_post_meta( $order->get_id(), '_cwpai_carrier_name', true );
        if ( ! $tracking_number || ! $carrier_name ) {
            return;
        }
        ?>
        <h2><?php _e( 'Tracking Information', 'cwpai' ); ?></h2>
        <p>
            <strong><?php _e( 'Tracking Number:', 'cwpai' ); ?></strong>
            <?php echo esc_html( $tracking_number ); ?>
        </p>
        <p>
            <strong><?php _e( 'Carrier:', 'cwpai' ); ?></strong>
            <?php echo esc_html( $carrier_name ); ?>
        </p>
        <?php
        if ( in_array( $carrier_name, array( 'fedex', 'ups', 'usps' ) ) ) {
            echo $this->get_tracking_url( $carrier_name, $tracking_number );
        }
    }
    
    public function add_tracking_info_to_order_page( $order_id ) {
        $tracking_number = get_post_meta( $order_id, '_cwpai_tracking_number', true );
        $carrier_name = get_post_meta( $order_id, '_cwpai_carrier_name', true );
        if ( ! $tracking_number || ! $carrier_name ) {
            return;
        }
        ?>
        <h2><?php _e( 'Tracking Information', 'cwpai' ); ?></h2>
        <p>
            <strong><?php _e( 'Tracking Number:', 'cwpai' ); ?></strong>
            <?php echo esc_html( $tracking_number ); ?>
        </p>
        <p>
            <strong><?php _e( 'Carrier:', 'cwpai' ); ?></strong>
            <?php echo esc_html( $carrier_name ); ?>
        </p>
        <?php
        if ( in_array( $carrier_name, array( 'fedex', 'ups', 'usps' ) ) ) {
            echo $this->get_tracking_url( $carrier_name, $tracking_number );
        }
    }
    
    private function get_tracking_url( $carrier_name, $tracking_number ) {
        switch ( $carrier_name ) {
            case 'fedex':
                $url = 'https://www.fedex.com/apps/fedextrack/?tracknumbers=' . $tracking_number;
                break;
            case 'ups':
                $url = 'https://www.ups.com/track?loc=en_US&tracknum=' . $tracking_number;
                break;
            case 'usps':
                $url = 'https://tools.usps.com/go/TrackConfirmAction?tLabels=' . $tracking_number;
                break;
            default:
                return '';
        }
        return '<p><a href="' . esc_url( $url ) . '" target="_blank">' . __( 'Click here to track your shipment', 'cwpai' ) . '</a></p>';
    }
}

new CWPAI_Shipping_Tracking();