Display CMS Optimierungen 03-06-2026

app/Services/DisplayQrCodeService.php

@@ -0,0 +1,71 @@
+<?php
+
+namespace App\Services;
+
+use Illuminate\Support\Facades\Http;
+use Illuminate\Support\Facades\Storage;
+
+class DisplayQrCodeService
+{
+    /**
+     * @return array{path: string, url: string}|null
+     */
+    public function generateForUrl(?string $url): ?array
+    {
+        $normalizedUrl = $this->normalizeUrl($url);
+
+        if ($normalizedUrl === '') {
+            return null;
+        }
+
+        $path = 'display-qr-codes/'.sha1($normalizedUrl).'.png';
+        $disk = Storage::disk('public');
+
+        if (! $disk->exists($path)) {
+            try {
+                $response = Http::timeout(10)
+                    ->retry(2, 300)
+                    ->get($this->remoteQrUrl($normalizedUrl));
+
+                if (! $response->successful() || $response->body() === '') {
+                    return null;
+                }
+
+                $disk->put($path, $response->body());
+            } catch (\Throwable) {
+                return null;
+            }
+        }
+
+        return [
+            'path' => $path,
+            'url' => asset('storage/'.$path),
+        ];
+    }
+
+    public function normalizeUrl(?string $url): string
+    {
+        $url = trim((string) $url);
+
+        if ($url === '') {
+            return '';
+        }
+
+        if (str_starts_with($url, 'http://') || str_starts_with($url, 'https://')) {
+            return $url;
+        }
+
+        return 'https://'.$url;
+    }
+
+    private function remoteQrUrl(string $url): string
+    {
+        return 'https://api.qrserver.com/v1/create-qr-code/?'.http_build_query([
+            'size' => '300x300',
+            'margin' => '8',
+            'color' => '000000',
+            'bgcolor' => 'ffffff',
+            'data' => $url,
+        ]);
+    }
+}