add python log viewer

src/Controller/Admin/AdminVectorLogController.php

@@ -0,0 +1,69 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Controller\Admin;
+
+use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
+use Symfony\Component\HttpFoundation\Response;
+use Symfony\Component\Routing\Attribute\Route;
+
+#[Route('/admin/vector')]
+final class AdminVectorLogController extends AbstractController
+{
+    #[Route('/log', name: 'admin_vector_log')]
+    public function view(): Response
+    {
+        $this->denyAccessUnlessGranted('ROLE_SUPER_ADMIN');
+
+        // ⚠️ Pfad ggf. anpassen falls bei dir anders konfiguriert
+        $logFile = \dirname(__DIR__, 3) . '/var/log/vector_service.log';
+
+        if (!\file_exists($logFile)) {
+            return $this->render('admin/vector/log.html.twig', [
+                'content' => 'vector_service.log not found.',
+                'fileExists' => false,
+            ]);
+        }
+
+        $content = $this->readLastLines($logFile, 500);
+
+        return $this->render('admin/vector/log.html.twig', [
+            'content' => $content,
+            'fileExists' => true,
+        ]);
+    }
+
+    /**
+     * Read last N lines safely (memory-friendly)
+     */
+    private function readLastLines(string $file, int $lines = 500): string
+    {
+        $handle = \fopen($file, 'rb');
+        if (!$handle) {
+            return 'Unable to open log file.';
+        }
+
+        $buffer = '';
+        $chunkSize = 4096;
+        $lineCount = 0;
+        $pos = -1;
+
+        \fseek($handle, 0, SEEK_END);
+        $fileSize = \ftell($handle);
+
+        while ($lineCount < $lines && -$pos < $fileSize) {
+            $step = \min($chunkSize, $fileSize + $pos);
+            \fseek($handle, $pos - $step, SEEK_END);
+            $chunk = \fread($handle, $step);
+            $buffer = $chunk . $buffer;
+            $lineCount += \substr_count($chunk, "\n");
+            $pos -= $step;
+        }
+
+        \fclose($handle);
+
+        $linesArray = \explode("\n", $buffer);
+        return \implode("\n", \array_slice($linesArray, -$lines));
+    }
+}