feat: add automatic item pickup slip printing via HP ePrint

app/Mail/PickupSlipMail.php

@@ -0,0 +1,58 @@
+<?php
+
+namespace App\Mail;
+
+use Illuminate\Bus\Queueable;
+use Illuminate\Mail\Mailable;
+use Illuminate\Mail\Mailables\Attachment;
+use Illuminate\Mail\Mailables\Content;
+use Illuminate\Mail\Mailables\Envelope;
+use Illuminate\Queue\SerializesModels;
+
+class PickupSlipMail extends Mailable
+{
+    use Queueable, SerializesModels;
+
+    protected $pdfOutput;
+
+    /**
+     * Create a new message instance.
+     */
+    public function __construct($pdfOutput)
+    {
+        $this->pdfOutput = $pdfOutput;
+    }
+
+    /**
+     * Get the message envelope.
+     */
+    public function envelope(): Envelope
+    {
+        return new Envelope(
+            subject: 'Item Pickup Slip',
+        );
+    }
+
+    /**
+     * Get the message content definition.
+     */
+    public function content(): Content
+    {
+        return new Content(
+            view: 'emails.pickup_slip',
+        );
+    }
+
+    /**
+     * Get the attachments for the message.
+     *
+     * @return array<int, Attachment>
+     */
+    public function attachments(): array
+    {
+        return [
+            Attachment::fromData(fn () => $this->pdfOutput, 'pickup_slip.pdf')
+                ->withMime('application/pdf'),
+        ];
+    }
+}