Lib und Services für PDF Viewer hinzugefügt

lib/content_views/pdf_viewer_page.dart

@@ -0,0 +1,130 @@
+import 'dart:io';
+import 'package:flutter/material.dart';
+import 'package:pdfrx/pdfrx.dart';
+import 'package:stadtbote/content_views/utils/content_view_widget.dart';
+import 'package:stadtbote/tools/pdf_service.dart';
+import 'package:stadtbote/tools/util.dart';
+
+class PdfViewerPage extends ContentViewWidget {
+  final String pdfUrl;
+  final String title;
+
+  const PdfViewerPage({
+    super.key,
+    required this.pdfUrl,
+    this.title = 'PDF',
+  });
+
+  @override
+  State<PdfViewerPage> createState() => _PdfViewerPageState();
+
+  @override
+  Future<Widget> getHeaderWidget(BuildContext context) async {
+    await Future.delayed(const Duration(microseconds: 0));
+    return Text(
+      title,
+      style: const TextStyle(
+        fontSize: 18,
+        fontWeight: FontWeight.bold,
+      ),
+    );
+  }
+}
+
+class _PdfViewerPageState extends State<PdfViewerPage> {
+  final PdfService _pdfService = PdfService();
+  File? _pdfFile;
+  bool _isLoading = true;
+  String? _errorMessage;
+
+  @override
+  void initState() {
+    super.initState();
+    _loadPdf();
+  }
+
+  Future<void> _loadPdf() async {
+    if (!_pdfService.isValidPdfUrl(widget.pdfUrl)) {
+      setState(() {
+        _isLoading = false;
+        _errorMessage = 'Ungültige PDF-URL';
+      });
+      return;
+    }
+
+    try {
+      final file = await _pdfService.getPdf(widget.pdfUrl);
+      setState(() {
+        _pdfFile = file;
+        _isLoading = false;
+      });
+    } catch (e) {
+      Util.logException('Error loading PDF: $e');
+      setState(() {
+        _isLoading = false;
+        _errorMessage = 'Fehler beim Laden der PDF: $e';
+      });
+    }
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    if (_isLoading) {
+      return const Center(
+        child: Column(
+          mainAxisAlignment: MainAxisAlignment.center,
+          children: [
+            CircularProgressIndicator(),
+            SizedBox(height: 16),
+            Text('PDF wird geladen...'),
+          ],
+        ),
+      );
+    }
+
+    if (_errorMessage != null) {
+      return Center(
+        child: Padding(
+          padding: const EdgeInsets.all(16.0),
+          child: Column(
+            mainAxisAlignment: MainAxisAlignment.center,
+            children: [
+              const Icon(
+                Icons.error_outline,
+                size: 64,
+                color: Colors.red,
+              ),
+              const SizedBox(height: 16),
+              Text(
+                _errorMessage!,
+                textAlign: TextAlign.center,
+                style: const TextStyle(color: Colors.red),
+              ),
+              const SizedBox(height: 16),
+              ElevatedButton(
+                onPressed: () {
+                  setState(() {
+                    _isLoading = true;
+                    _errorMessage = null;
+                  });
+                  _loadPdf();
+                },
+                child: const Text('Erneut versuchen'),
+              ),
+            ],
+          ),
+        ),
+      );
+    }
+
+    if (_pdfFile == null) {
+      return const Center(
+        child: Text('Keine PDF-Datei verfügbar'),
+      );
+    }
+
+    return PdfViewer.file(
+      _pdfFile!.path,
+    );
+  }
+}