452 lines
16 KiB
Dart
452 lines
16 KiB
Dart
import 'package:cached_network_image/cached_network_image.dart';
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import 'package:flutter/material.dart';
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import 'package:intl/intl.dart';
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import 'package:provider/provider.dart';
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import '../models/post_item.dart';
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import '../services/auth_service.dart';
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import '../services/firestore_service.dart';
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import '../services/pdf_service.dart';
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import '../services/storage_service.dart';
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import 'add_issue_screen.dart';
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import 'add_post_screen.dart';
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import 'auth_dialog.dart';
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import 'detail_screen.dart';
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class PostListScreen extends StatefulWidget {
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final String collectionName;
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final String title;
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const PostListScreen({
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super.key,
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required this.collectionName,
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required this.title,
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});
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@override
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State<PostListScreen> createState() => _PostListScreenState();
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}
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class _PostListScreenState extends State<PostListScreen> {
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final FirestoreService _firestoreService = FirestoreService();
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final StorageService _storageService = StorageService();
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final Map<String, PostItem> _selectedItems = {};
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String _searchQuery = '';
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bool _isSearchActive = false;
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final TextEditingController _searchController = TextEditingController();
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@override
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void dispose() {
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_searchController.dispose();
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super.dispose();
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}
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void _toggleSelection(PostItem item) {
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setState(() {
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if (_selectedItems.containsKey(item.id)) {
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_selectedItems.remove(item.id);
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} else {
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_selectedItems[item.id] = item;
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}
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});
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}
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void _clearSelection() {
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setState(() {
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_selectedItems.clear();
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});
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}
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Future<void> _deletePost(PostItem item) async {
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final auth = Provider.of<AuthService>(context, listen: false);
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final currentUser = auth.user;
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final isAuthor = currentUser != null && item.authorUid == currentUser.uid;
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final canDelete = isAuthor || auth.isAdmin;
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if (!canDelete) {
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ScaffoldMessenger.of(context).showSnackBar(
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const SnackBar(
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content: Text('Keine Berechtigung zum Löschen dieses Beitrags.'),
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backgroundColor: Colors.red,
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),
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);
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return;
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}
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try {
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for (final url in item.imageUrls) {
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await _storageService.deleteFileByUrl(url);
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}
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await _firestoreService.deletePost(widget.collectionName, item.id);
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if (!mounted) return;
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ScaffoldMessenger.of(context).showSnackBar(
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const SnackBar(content: Text('Eintrag gelöscht.')),
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);
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} catch (e) {
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if (!mounted) return;
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ScaffoldMessenger.of(context).showSnackBar(
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SnackBar(content: Text('Fehler beim Löschen: $e')),
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);
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}
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}
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Future<void> _onAddNewPressed() async {
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final auth = Provider.of<AuthService>(context, listen: false);
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// News are official announcements and can only be created by Admins
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if (widget.collectionName == 'News' && !auth.isAdmin) {
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ScaffoldMessenger.of(context).showSnackBar(
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const SnackBar(
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content:
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Text('Nur Administratoren können Neuigkeiten veröffentlichen.'),
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backgroundColor: Colors.amber,
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),
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);
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return;
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}
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if (!auth.isCommunityUnlocked && !auth.isAuthenticated) {
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await AuthDialog.show(context);
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if (!mounted) return;
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if (!auth.isCommunityUnlocked && !auth.isAuthenticated) {
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return;
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}
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}
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_clearSelection();
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if (widget.collectionName == 'Issues') {
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Navigator.push(
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context,
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MaterialPageRoute(builder: (ctx) => const AddIssueScreen()),
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);
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} else {
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Navigator.push(
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context,
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MaterialPageRoute(
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builder: (ctx) => AddPostScreen(
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collectionName: widget.collectionName,
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screenTitle: widget.collectionName == 'News'
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? 'Neue Nachricht'
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: 'Neue Idee einbringen',
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),
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),
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);
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}
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}
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@override
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Widget build(BuildContext context) {
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final auth = Provider.of<AuthService>(context);
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final currentUser = auth.user;
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return Scaffold(
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appBar: AppBar(
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title: _isSearchActive
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? TextField(
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controller: _searchController,
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autofocus: true,
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style: const TextStyle(color: Colors.black87),
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decoration: InputDecoration(
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hintText: 'Suche in ${widget.title}...',
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border: InputBorder.none,
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hintStyle: TextStyle(color: Colors.grey.shade600),
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),
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onChanged: (val) => setState(() => _searchQuery = val.trim()),
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)
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: Row(
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mainAxisSize: MainAxisSize.min,
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children: [
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ClipRRect(
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borderRadius: BorderRadius.circular(6),
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child: Image.asset(
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'assets/images/logo.png',
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height: 26,
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fit: BoxFit.contain,
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),
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),
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const SizedBox(width: 8),
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Flexible(
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child: Text(
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widget.title,
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overflow: TextOverflow.ellipsis,
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),
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),
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],
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),
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actions: [
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IconButton(
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icon: Icon(_isSearchActive ? Icons.close : Icons.search),
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tooltip: _isSearchActive ? 'Suche beenden' : 'Suchen',
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onPressed: () {
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setState(() {
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if (_isSearchActive) {
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_isSearchActive = false;
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_searchQuery = '';
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_searchController.clear();
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} else {
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_isSearchActive = true;
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}
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});
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},
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),
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if (_selectedItems.isNotEmpty) ...[
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IconButton(
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icon: const Icon(Icons.picture_as_pdf),
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tooltip: 'Auswahl als PDF-Tabelle drucken',
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onPressed: () => PdfService.printSelectedItemsTable(
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items: _selectedItems.values.toList(),
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title: widget.title,
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),
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),
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IconButton(
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icon: const Icon(Icons.deselect),
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tooltip: 'Auswahl aufheben',
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onPressed: _clearSelection,
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),
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],
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],
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),
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body: StreamBuilder<List<PostItem>>(
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stream: _firestoreService.getPostsStream(widget.collectionName),
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builder: (context, snapshot) {
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if (snapshot.hasError) {
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return Center(
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child: Text(
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'Fehler beim Laden: ${snapshot.error}',
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style: const TextStyle(color: Colors.red),
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),
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);
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}
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if (snapshot.connectionState == ConnectionState.waiting) {
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return const Center(child: CircularProgressIndicator());
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}
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final allItems = snapshot.data ?? [];
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final filteredItems = allItems.where((item) {
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if (_searchQuery.isEmpty) return true;
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final query = _searchQuery.toLowerCase();
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final matchesTitle = item.title.toLowerCase().contains(query);
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final matchesDesc = item.description.toLowerCase().contains(query);
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final matchesStreet =
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item.street?.toLowerCase().contains(query) ?? false;
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final matchesCategory =
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item.category?.toLowerCase().contains(query) ?? false;
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return matchesTitle || matchesDesc || matchesStreet || matchesCategory;
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}).toList();
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if (filteredItems.isEmpty) {
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return Center(
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child: Column(
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mainAxisAlignment: MainAxisAlignment.center,
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children: [
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Icon(Icons.inbox, size: 64, color: Colors.grey.shade400),
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const SizedBox(height: 12),
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Text(
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_searchQuery.isNotEmpty
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? 'Keine Treffer für "$_searchQuery"'
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: 'Noch keine Einträge vorhanden.',
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style: TextStyle(color: Colors.grey.shade600, fontSize: 16),
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),
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],
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),
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);
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}
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return ListView.separated(
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itemCount: filteredItems.length,
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separatorBuilder: (ctx, idx) => const Divider(
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height: 1,
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indent: 16,
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endIndent: 16,
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color: Colors.black12,
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),
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itemBuilder: (context, index) {
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final item = filteredItems[index];
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final isSelected = _selectedItems.containsKey(item.id);
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final isAuthor =
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currentUser != null && item.authorUid == currentUser.uid;
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final canDelete = isAuthor || auth.isAdmin;
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final formattedDate =
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DateFormat('dd.MM.yyyy').format(item.createdDate);
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Widget itemTile = ListTile(
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selected: isSelected,
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selectedTileColor: Colors.blue.shade50,
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contentPadding:
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const EdgeInsets.symmetric(horizontal: 16, vertical: 8),
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onTap: () {
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if (_selectedItems.isNotEmpty) {
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_toggleSelection(item);
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} else {
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Navigator.push(
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context,
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MaterialPageRoute(
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builder: (ctx) => DetailScreen(item: item),
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),
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);
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}
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},
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onLongPress: () => _toggleSelection(item),
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leading: item.imageUrl.isNotEmpty
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? Stack(
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children: [
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ClipRRect(
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borderRadius: BorderRadius.circular(8),
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child: CachedNetworkImage(
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imageUrl: item.imageUrl,
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width: 70,
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height: 70,
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fit: BoxFit.cover,
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placeholder: (ctx, url) => Container(
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width: 70,
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height: 70,
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color: Colors.grey.shade200,
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child: const Center(
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child: SizedBox(
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width: 20,
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height: 20,
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child: CircularProgressIndicator(strokeWidth: 2),
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),
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),
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),
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errorWidget: (ctx, url, err) => Container(
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width: 70,
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height: 70,
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color: Colors.grey.shade200,
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child: const Icon(Icons.image, color: Colors.grey),
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),
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),
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),
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if (isSelected)
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const Positioned(
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top: 2,
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left: 2,
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child: CircleAvatar(
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radius: 12,
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backgroundColor: Colors.blue,
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child: Icon(Icons.check, size: 16, color: Colors.white),
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),
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),
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],
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)
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: isSelected
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? const CircleAvatar(
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backgroundColor: Colors.blue,
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child: Icon(Icons.check, color: Colors.white),
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)
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: null,
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title: Row(
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mainAxisAlignment: MainAxisAlignment.spaceBetween,
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children: [
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Expanded(
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child: Text(
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item.title,
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style: const TextStyle(
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fontSize: 16,
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fontWeight: FontWeight.bold,
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),
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maxLines: 1,
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overflow: TextOverflow.ellipsis,
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),
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),
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const SizedBox(width: 8),
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Text(
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formattedDate,
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style: TextStyle(
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fontSize: 12,
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color: Colors.grey.shade600,
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),
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),
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],
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),
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subtitle: Column(
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crossAxisAlignment: CrossAxisAlignment.start,
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children: [
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if (item.street != null && item.street!.isNotEmpty) ...[
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const SizedBox(height: 2),
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Row(
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children: [
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const Icon(Icons.location_on, size: 12, color: Colors.redAccent),
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const SizedBox(width: 4),
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Text(
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item.street!,
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style: const TextStyle(
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fontSize: 12,
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fontWeight: FontWeight.w500,
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color: Colors.black87,
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),
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),
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],
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),
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],
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const SizedBox(height: 4),
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Text(
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item.description,
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maxLines: 2,
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overflow: TextOverflow.ellipsis,
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style: TextStyle(
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fontSize: 13,
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color: Colors.grey.shade800,
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),
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),
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],
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),
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);
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if (canDelete) {
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return Dismissible(
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key: Key(item.id),
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direction: DismissDirection.endToStart,
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background: Container(
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color: Colors.red,
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alignment: Alignment.centerRight,
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padding: const EdgeInsets.only(right: 20),
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child: const Icon(Icons.delete, color: Colors.white),
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),
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confirmDismiss: (direction) async {
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return await showDialog(
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context: context,
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builder: (dialogCtx) => AlertDialog(
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title: const Text('Eintrag löschen?'),
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content: const Text(
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'Möchten Sie diesen Eintrag wirklich unwiderruflich löschen?'),
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actions: [
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TextButton(
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onPressed: () => Navigator.pop(dialogCtx, false),
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child: const Text('Abbrechen'),
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),
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ElevatedButton(
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style: ElevatedButton.styleFrom(
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backgroundColor: Colors.red),
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onPressed: () => Navigator.pop(dialogCtx, true),
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child: const Text('Löschen'),
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),
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],
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),
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);
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},
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onDismissed: (direction) => _deletePost(item),
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child: itemTile,
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);
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}
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return itemTile;
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},
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);
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},
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),
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floatingActionButton: (widget.collectionName == 'News' && !auth.isAdmin)
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? null
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: FloatingActionButton(
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onPressed: _onAddNewPressed,
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tooltip: widget.collectionName == 'News'
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? 'Nachricht verfassen'
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: 'Neuen Eintrag erstellen',
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child: const Icon(Icons.add),
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),
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);
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}
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}
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