Eliminate popup when downloading xml invoices.

app/Http/Controllers/Api/EController.php

@@ -0,0 +1,53 @@
+<?php
+
+namespace App\Http\Controllers\Api;
+
+use App\Http\Controllers\Controller;
+use App\Http\Option;
+use App\Models\Invoice;
+use Symfony\Component\HttpFoundation\StreamedResponse;
+
+class EController extends Controller
+{
+    /**
+     * Return an invoice as download for the specified resource.
+     */
+    public function downloadInvoice(int $id): StreamedResponse
+    {
+        $invoice = Invoice::find($id);
+        $taxes = self::buildTaxes($invoice->items);
+
+        return response()->streamDownload(function () use ($invoice, $taxes) {
+            echo view('xml.invoice', ['invoice' => $invoice, 'options' => Option::optionsAsObject(), 'taxes' => $taxes]);
+        }, 'test.xml', ['Content-Type' => 'application/xml']);
+
+    }
+
+    /**
+     * Return a rendered xml invoice as string to build an email attachment from it for the specified resource.
+     */
+    public function attachInvoice(int $id): string
+    {
+        $invoice = Invoice::find($id);
+        $taxes = self::buildTaxes($invoice->items);
+
+        return view('xml.invoice', ['invoice' => $invoice, 'options' => Option::optionsAsObject(), 'taxes' => $taxes])->render();
+    }
+
+    /**
+     * Build taxes for the given invoice items grouped by tax.
+     */
+    private static function buildTaxes($items): array
+    {
+        $taxes = [];
+        foreach ($items as $item) {
+            if (!isset($taxes[$item->tax])) {
+                $taxes[$item->tax] = ['tax' => 0, 'taxable' => 0];
+            }
+            $taxes[$item->tax]['tax'] += round($item->price * $item->amount * ($item->tax / 100) * (100 - $item->discount) / 100, 2, PHP_ROUND_HALF_UP);
+            $taxes[$item->tax]['taxable'] += $item->price * $item->amount * (100 - $item->discount) / 100;
+        }
+
+        return $taxes;
+    }
+}