first commit

app/Http/Controllers/DocumentController.php

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+<?php
+
+namespace App\Http\Controllers;
+
+use App\Models\AppSetting;
+use App\Models\Submission;
+use App\Models\SubmissionDocument;
+use App\Services\DocumentService;
+use Illuminate\Http\Request;
+
+class DocumentController extends Controller
+{
+    public function __construct(protected DocumentService $documents) {}
+
+    /** Muat naik laporan PDF (perunding sahaja, serahan belum dikunci). */
+    public function store(Request $request, Submission $submission)
+    {
+        $this->authorize('update', $submission);
+
+        $maxKb = (int) AppSetting::get('max_upload_size_kb', config('mbip.max_upload_size_kb', 20480));
+
+        $request->validate([
+            'report' => ['required', 'file', 'mimes:pdf', 'mimetypes:application/pdf', "max:$maxKb"],
+        ], [], ['report' => 'laporan PDF']);
+
+        $this->documents->store($submission, $request->file('report'), auth()->user());
+
+        return back()->with('success', 'Laporan PDF berjaya dimuat naik (versi baharu dicipta).');
+    }
+
+    /** Muat turun laporan — dilindungi oleh polisi. */
+    public function download(SubmissionDocument $document)
+    {
+        $this->authorize('view', $document->submission);
+
+        return $this->documents->download($document);
+    }
+
+    public function setActive(SubmissionDocument $document)
+    {
+        $this->authorize('update', $document->submission);
+
+        $this->documents->setActiveVersion($document->submission, $document);
+
+        return back()->with('success', 'Versi laporan aktif dikemas kini.');
+    }
+}