feat: let managers edit the staffing matrix

src/Controller/Administrative/System/StaffingRule/PreviewController.php

@@ -0,0 +1,46 @@
+<?php
+
+namespace App\Controller\Administrative\System\StaffingRule;
+
+use App\Service\Assignment\StaffingConfigurationException;
+use App\Service\Export\StaffingPreviewExporter;
+use Knp\Component\Pager\PaginatorInterface;
+use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
+use Symfony\Component\HttpFoundation\Request;
+use Symfony\Component\HttpFoundation\Response;
+use Symfony\Component\Routing\Attribute\Route;
+use Symfony\Component\Security\Http\Attribute\IsGranted;
+
+class PreviewController extends AbstractController
+{
+    public function __construct(
+        private readonly StaffingPreviewExporter $previewExporter,
+        private readonly PaginatorInterface $paginator,
+    ) {
+    }
+
+    #[Route('/administrative/system/staffing-rule/preview', name: 'app_administrative_system_staffing_rule_preview')]
+    #[IsGranted('ROLE_ADMINISTRATIVE')]
+    public function index(Request $request): Response
+    {
+        try {
+            $rows = $this->previewExporter->rows();
+        } catch (StaffingConfigurationException $e) {
+            $this->addFlash('error', 'Ein Jobprofil oder Honorar der Besetzungsmatrix ist nicht (mehr) vorhanden: '.$e->getMessage());
+
+            return $this->redirectToRoute('app_administrative_system_staffing_rule_index');
+        }
+
+        // The candidates are a computed list, not a query: page the finished rows. The Excel
+        // export stays the full list.
+        $pagination = $this->paginator->paginate(
+            $rows,
+            $request->query->getInt('page', 1),
+            $request->query->getInt('limit', 50),
+        );
+
+        return $this->render('administrative/system/staffing_rule/preview.html.twig', [
+            'pagination' => $pagination,
+        ]);
+    }
+}