update email template

app/Integrations/Whmcs/Extractors/InvoiceExtractor.php

@@ -0,0 +1,28 @@
+<?php
+
+namespace App\Integrations\Whmcs\Extractors;
+
+use Illuminate\Support\Facades\DB;
+use Illuminate\Support\LazyCollection;
+
+class InvoiceExtractor
+{
+    public function extract(): LazyCollection
+    {
+        return DB::connection('whmcs')->table('tblinvoices')->orderBy('id')->cursor();
+    }
+
+    /**
+     * Line items for a single invoice (tblinvoiceitems has no per-invoice cursor of its own,
+     * items are pulled per-invoice while its job runs).
+     */
+    public function items(int $invoiceId): \Illuminate\Support\Collection
+    {
+        return DB::connection('whmcs')->table('tblinvoiceitems')->where('invoiceid', $invoiceId)->get();
+    }
+
+    public function orderIdFor(int $invoiceId): ?int
+    {
+        return DB::connection('whmcs')->table('tblorders')->where('invoiceid', $invoiceId)->value('id');
+    }
+}