Send email to customer when order is shipped via Boxtal Connect plugin.

functions.php

<?php 
use Boxtal\BoxtalConnectWoocommerce\Util\Order_Util;
use Boxtal\BoxtalConnectWoocommerce\Order\Controller;

// send email to custom with tracking number on order shipped 
add_action('boxtal_connect_order_shipped', 'send_tracking_number', 10, 2);
function send_tracking_number($order_id) {
	$order = wc_get_order($order_id);

	$email = $order->get_billing_email();


	$subject = 'Votre commande a été expédiée';

	$controller = new Controller(
		array(
			'url'     => null,
			'version' => null,
		)
	);
	$tracking   = $controller->get_order_tracking( Order_Util::get_id( $order ) );
	
	$message = '';
	
	$message .= '<p style="margin-bottom: 30px;">Bonjour,</p>';
    
	if ( null !== $tracking && property_exists( $tracking, 'shipmentsTracking' ) && ! empty( $tracking->shipmentsTracking ) ) {
	

		if ( 1 === count( $tracking->shipmentsTracking ) ){
			$message .= '<p>';
			$message .=  __('Your order has been sent in 1 shipment.', 'boxtal-connect');
			$message .= '</p>';
		}else{
			$message .= '<p>';
			$message .= sprintf( __( 'Your order has been sent in %s shipments.', 'boxtal-connect' ), count( $tracking->shipmentsTracking ) ) ;
			$message .= '</p>';
		}
		
		foreach ( $tracking->shipmentsTracking as $shipment ) {
			$message .= '<h4>';
			$message .= sprintf( __( 'Shipment reference %s', 'boxtal-connect' ), $shipment->reference );
			$message .= '</h4>';
			$parcel_count = count( $shipment->parcelsTracking );

			if ( 1 === $parcel_count || 0 === $parcel_count ) {
				$message .= '<p>';
				$message .= sprintf( __( 'Your shipment has %s package.', 'boxtal-connect' ), $parcel_count );
				$message .= '</p>';
			}else {
				$message .= '<p>';
				$message .=  sprintf( __( 'Your shipment has %s packages.', 'boxtal-connect' ), $parcel_count );
				$message .= '</p>';
			}
			
			foreach ( $shipment->parcelsTracking as $parcel ) {
				
				if ( null !== $parcel->trackingUrl ) {
					$message .= '<p>';
					$message .=  sprintf( __( 'Package reference %s', 'boxtal-connect' ), '<a href="' . esc_url( $parcel->trackingUrl ) . '" target="_blank">' . $parcel->reference . '</a>' );
					$message .= '</p>';
					
				}else {
					$message .= '<p>';
					$message .= sprintf( __( 'Package reference %s', 'boxtal-connect' ), $parcel->reference );
					$message .= '</p>';
				}
			}
		}
		
	}
	
	$message .= '<p style="margin-top: 50px;"></p>';
	
	
	

	$headers = array('Content-Type: text/html; charset=UTF-8');

	$site_name = get_bloginfo('name');

	$from = 'From: ' . $site_name . ' <info@blanera.fr>';

	$headers[] = $from;

	wp_mail($email, $subject, $message, $headers);


}