Improved handling for new invoices

app/Mail/InvoiceMails/InvoiceMailsNewInvoiceMail.php

@@ -0,0 +1,60 @@
+<?php
+
+namespace App\Mail\InvoiceMails;
+
+use App\Models\CostUnit;
+use App\Models\Event;
+use App\Models\EventParticipant;
+use App\Models\Invoice;
+use App\ValueObjects\Amount;
+use Illuminate\Http\Request;
+use Illuminate\Mail\Mailable;
+use Illuminate\Mail\Mailables\Attachment;
+use Illuminate\Mail\Mailables\Content;
+use Illuminate\Mail\Mailables\Envelope;
+
+class InvoiceMailsNewInvoiceMail extends Mailable {
+    public function __construct(
+        private Invoice $invoice,
+        private CostUnit $costUnit,
+    )
+    {
+        //
+    }
+
+    /**
+     * Get the message envelope.
+     */
+    public function envelope(): Envelope
+    {
+        return new Envelope(
+            subject: 'Neue Abrechnung in Kostenstelle ' . $this->costUnit->name,
+        );
+    }
+
+    /**
+     * Get the message content definition.
+     */
+    public function content(): Content
+    {
+        return new Content(
+            view: 'emails.invoices.new_invoice',
+            with: [
+                'costUnitName' => $this->costUnit->name,
+                'invoiceAmount' => Amount::fromString($this->invoice->amount)->toString(),
+                'invoiceType' => $this->invoice->invoiceType()->name,
+            ],
+        );
+    }
+
+
+    /**
+     * Get the attachments for the message.
+     *
+     * @return array<int, Attachment>
+     */
+    public function attachments(): array
+    {
+        return [];
+    }
+}