WitShop/app/Mail/PaymentReceivedMail.php

<?php

namespace App\Mail;

use App\Models\EmailTemplate;
use App\Models\Order;
use App\Models\Setting;
use Illuminate\Bus\Queueable;
use Illuminate\Mail\Mailable;
use Illuminate\Queue\SerializesModels;

class PaymentReceivedMail extends Mailable
{
    use Queueable, SerializesModels;

    public function __construct(
        public Order $order,
        private string $pdfContent,
        private string $pdfFilename,
    ) {}

    public function build()
    {
        $order    = $this->order;
        $template = EmailTemplate::getByKey('payment_received');

        if (!$template) {
            return $this
                ->subject('Ihre Rechnung – ' . $order->order_number . ' – ' . Setting::get('shop_name'))
                ->view('emails.payment_received')
                ->attachData($this->pdfContent, $this->pdfFilename, ['mime' => 'application/pdf']);
        }

        $customerName = $order->billingAddress()?->full_name ?? $order->guest_email;

        $data = [
            'customer_name' => $customerName,
            'order_number'  => $order->order_number,
            'order_total'   => number_format($order->total, 2, ',', '.'),
            'shop_name'     => Setting::get('shop_name'),
            'shop_email'    => Setting::get('shop_email'),
        ];

        return $this
            ->subject($template->renderSubject($data))
            ->html($template->renderBody($data))
            ->attachData($this->pdfContent, $this->pdfFilename, ['mime' => 'application/pdf']);
    }
}