556 lines
22 KiB
Dart
556 lines
22 KiB
Dart
import 'package:cloud_firestore/cloud_firestore.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 '../services/auth_service.dart';
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import '../services/firestore_service.dart';
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class UserManagementScreen extends StatefulWidget {
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const UserManagementScreen({super.key});
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@override
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State<UserManagementScreen> createState() => _UserManagementScreenState();
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}
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class _UserManagementScreenState extends State<UserManagementScreen> {
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final FirestoreService _firestoreService = FirestoreService();
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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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String _selectedFilter = 'all'; // 'all', 'admins', 'citizens'
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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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Future<void> _toggleAdminRole({
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required String uid,
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required String email,
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required String displayName,
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required bool currentIsAdmin,
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required String currentAdminUid,
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}) async {
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if (currentIsAdmin && uid == currentAdminUid) {
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ScaffoldMessenger.of(context).showSnackBar(
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const SnackBar(
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content: Text(
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'Sie können sich nicht selbst die Administrator-Rechte entziehen.'),
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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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final targetAction = currentIsAdmin ? 'entziehen' : 'erteilen';
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final confirmed = await showDialog<bool>(
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context: context,
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builder: (dCtx) => AlertDialog(
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title: Text(currentIsAdmin
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? 'Admin-Rechte entziehen?'
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: 'Zum Administrator ernennen?'),
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content: Text(currentIsAdmin
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? 'Möchten Sie $displayName die Administrator-Rechte wirklich entziehen?'
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: 'Möchten Sie $displayName wirklich zum Administrator ernennen? Dieser Nutzer erhält vollen Zugriff auf News, alle Beiträge, Bürgernachrichten und die Benutzerverwaltung.'),
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actions: [
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TextButton(
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onPressed: () => Navigator.pop(dCtx, 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:
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currentIsAdmin ? Colors.red : Colors.indigo.shade700,
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),
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onPressed: () => Navigator.pop(dCtx, true),
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child: Text(currentIsAdmin ? 'Rechte entziehen' : 'Ernennen'),
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),
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],
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),
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);
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if (confirmed == true) {
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try {
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await _firestoreService.setAdminRole(
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uid: uid,
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email: email,
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makeAdmin: !currentIsAdmin,
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grantedBy: currentAdminUid,
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);
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if (mounted) {
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ScaffoldMessenger.of(context).showSnackBar(
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SnackBar(
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content: Text(
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'Administrator-Rechte wurden erfolgreich $targetAction.'),
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backgroundColor: Colors.green,
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),
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);
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}
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} catch (e) {
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if (mounted) {
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ScaffoldMessenger.of(context).showSnackBar(
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SnackBar(
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content: Text('Fehler beim Ändern der Rechte: $e'),
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backgroundColor: Colors.red,
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),
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);
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}
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}
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}
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}
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Future<void> _showAddAdminDialog(String currentAdminUid) async {
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final emailController = TextEditingController();
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final uidController = TextEditingController();
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await showDialog(
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context: context,
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builder: (dCtx) => AlertDialog(
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title: const Text('Admin manuell hinzufügen'),
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content: Column(
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mainAxisSize: MainAxisSize.min,
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children: [
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const Text(
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'Geben Sie die E-Mail-Adresse oder Firebase-UID des neuen Administrators ein:',
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style: TextStyle(fontSize: 13),
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),
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const SizedBox(height: 12),
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TextField(
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controller: emailController,
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keyboardType: TextInputType.emailAddress,
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decoration: const InputDecoration(
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labelText: 'E-Mail-Adresse *',
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border: OutlineInputBorder(),
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),
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),
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const SizedBox(height: 10),
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TextField(
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controller: uidController,
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decoration: const InputDecoration(
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labelText: 'UID (optional)',
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hintText: 'z. B. aus Firebase Auth',
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border: OutlineInputBorder(),
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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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TextButton(
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onPressed: () => Navigator.pop(dCtx),
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child: const Text('Abbrechen'),
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),
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ElevatedButton(
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onPressed: () async {
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final email = emailController.text.trim().toLowerCase();
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final uid = uidController.text.trim();
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if (email.isEmpty && uid.isEmpty) {
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return;
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}
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final identifier = uid.isNotEmpty ? uid : email;
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try {
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await _firestoreService.addAdminDirectly(
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identifier: identifier,
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email: email,
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grantedBy: currentAdminUid,
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);
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if (dCtx.mounted) {
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Navigator.pop(dCtx);
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}
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if (mounted) {
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ScaffoldMessenger.of(context).showSnackBar(
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const SnackBar(
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content: Text('Administrator erfolgreich hinzugefügt.'),
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backgroundColor: Colors.green,
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),
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);
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}
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} catch (e) {
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if (mounted) {
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ScaffoldMessenger.of(context).showSnackBar(
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SnackBar(
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content: Text('Fehler beim Hinzufügen: $e'),
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backgroundColor: Colors.red,
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),
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);
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}
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}
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},
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child: const Text('Hinzufügen'),
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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 currentAdminUid = auth.user?.uid ?? '';
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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: 'Benutzer nach Name oder E-Mail suchen...',
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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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: const Text('Benutzerverwaltung'),
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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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IconButton(
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icon: const Icon(Icons.person_add_alt_1),
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tooltip: 'Admin manuell hinzufügen',
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onPressed: () => _showAddAdminDialog(currentAdminUid),
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),
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],
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),
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body: Column(
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children: [
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// Filter Chips
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Container(
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width: double.infinity,
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color: Colors.grey.shade50,
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padding: const EdgeInsets.symmetric(horizontal: 16, vertical: 8),
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child: SingleChildScrollView(
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scrollDirection: Axis.horizontal,
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child: Row(
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children: [
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ChoiceChip(
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label: const Text('Alle'),
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selected: _selectedFilter == 'all',
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onSelected: (_) => setState(() => _selectedFilter = 'all'),
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),
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const SizedBox(width: 8),
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ChoiceChip(
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avatar: const Icon(Icons.admin_panel_settings,
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size: 16, color: Colors.indigo),
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label: const Text('Administratoren'),
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selected: _selectedFilter == 'admins',
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onSelected: (_) =>
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setState(() => _selectedFilter = 'admins'),
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selectedColor: Colors.indigo.shade100,
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),
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const SizedBox(width: 8),
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ChoiceChip(
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avatar: const Icon(Icons.person_outline,
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size: 16, color: Colors.teal),
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label: const Text('Bürger'),
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selected: _selectedFilter == 'citizens',
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onSelected: (_) =>
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setState(() => _selectedFilter = 'citizens'),
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selectedColor: Colors.teal.shade100,
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),
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],
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),
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),
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),
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// Users and Admins Stream
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Expanded(
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child: StreamBuilder<QuerySnapshot<Map<String, dynamic>>>(
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stream: _firestoreService.getAdminsStream(),
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builder: (context, adminSnapshot) {
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final Set<String> adminUids = {};
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final Set<String> adminEmails = {};
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if (adminSnapshot.hasData) {
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for (final doc in adminSnapshot.data!.docs) {
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adminUids.add(doc.id.toLowerCase());
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final data = doc.data();
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final email =
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(data['email'] as String? ?? '').toLowerCase();
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if (email.isNotEmpty) adminEmails.add(email);
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final uid =
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(data['uid'] as String? ?? '').toLowerCase();
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if (uid.isNotEmpty) adminUids.add(uid);
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}
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}
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return StreamBuilder<QuerySnapshot<Map<String, dynamic>>>(
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stream: _firestoreService.getUsersStream(),
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builder: (context, userSnapshot) {
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if (userSnapshot.hasError) {
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return Center(
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child: Padding(
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padding: const EdgeInsets.all(24.0),
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child: Text(
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'Fehler beim Laden der Benutzer: ${userSnapshot.error}',
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style: const TextStyle(color: Colors.red),
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textAlign: TextAlign.center,
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),
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),
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);
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}
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if (userSnapshot.connectionState ==
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ConnectionState.waiting) {
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return const Center(child: CircularProgressIndicator());
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}
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final userDocs = userSnapshot.data?.docs ?? [];
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final filteredUsers = userDocs.where((doc) {
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final data = doc.data();
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final uid = doc.id;
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final email =
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(data['email'] as String? ?? '').toLowerCase();
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final isUserAdmin = adminUids.contains(uid.toLowerCase()) ||
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adminEmails.contains(email) ||
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data['isAdmin'] == true;
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if (_selectedFilter == 'admins' && !isUserAdmin) {
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return false;
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}
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if (_selectedFilter == 'citizens' && isUserAdmin) {
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return false;
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}
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if (_searchQuery.isNotEmpty) {
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final q = _searchQuery.toLowerCase();
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final name =
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(data['displayName'] as String? ?? '').toLowerCase();
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final fn =
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(data['firstName'] as String? ?? '').toLowerCase();
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final ln =
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(data['lastName'] as String? ?? '').toLowerCase();
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return name.contains(q) ||
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email.contains(q) ||
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fn.contains(q) ||
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ln.contains(q);
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}
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return true;
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}).toList();
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if (filteredUsers.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.people_outline,
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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 registrierten Benutzer vorhanden.',
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style: TextStyle(
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fontSize: 16,
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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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);
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}
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return ListView.separated(
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padding: EdgeInsets.only(
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bottom: MediaQuery.paddingOf(context).bottom + 20,
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),
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itemCount: filteredUsers.length,
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separatorBuilder: (ctx, i) => const Divider(height: 1),
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itemBuilder: (context, index) {
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final doc = filteredUsers[index];
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final data = doc.data();
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final uid = doc.id;
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final email = data['email'] as String? ?? '';
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final displayName = data['displayName'] as String? ??
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'${data['firstName'] ?? ''} ${data['lastName'] ?? ''}'.trim();
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final name = displayName.isNotEmpty
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? displayName
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: (email.isNotEmpty ? email : 'Bürger');
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final isCurrentUser = uid == currentAdminUid;
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final isUserAdmin =
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adminUids.contains(uid.toLowerCase()) ||
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adminEmails.contains(email.toLowerCase()) ||
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data['isAdmin'] == true;
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DateTime? createdAt;
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if (data['createdAt'] is Timestamp) {
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createdAt = (data['createdAt'] as Timestamp).toDate();
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}
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return ListTile(
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contentPadding: const EdgeInsets.symmetric(
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horizontal: 16, vertical: 8),
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leading: CircleAvatar(
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backgroundColor: isUserAdmin
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? Colors.indigo.shade100
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: Colors.blue.shade50,
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child: Icon(
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isUserAdmin
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? Icons.admin_panel_settings
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: Icons.person,
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color: isUserAdmin
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? Colors.indigo.shade800
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: Colors.blue.shade700,
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),
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),
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title: Row(
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children: [
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Expanded(
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child: Text(
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name,
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style: const TextStyle(
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fontSize: 15,
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fontWeight: FontWeight.bold,
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),
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overflow: TextOverflow.ellipsis,
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),
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),
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if (isCurrentUser) ...[
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const SizedBox(width: 6),
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Container(
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padding: const EdgeInsets.symmetric(
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horizontal: 6, vertical: 2),
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decoration: BoxDecoration(
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color: Colors.grey.shade200,
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borderRadius: BorderRadius.circular(4),
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),
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child: const Text(
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'Du',
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style: TextStyle(
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fontSize: 10,
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fontWeight: FontWeight.bold,
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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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),
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subtitle: Column(
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crossAxisAlignment: CrossAxisAlignment.start,
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children: [
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if (email.isNotEmpty) ...[
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const SizedBox(height: 2),
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Text(
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email,
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style: TextStyle(
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fontSize: 12,
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color: Colors.grey.shade700,
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),
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),
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],
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const SizedBox(height: 4),
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Row(
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children: [
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Container(
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padding: const EdgeInsets.symmetric(
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horizontal: 8, vertical: 2),
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decoration: BoxDecoration(
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color: isUserAdmin
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? Colors.indigo.shade50
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: Colors.teal.shade50,
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borderRadius: BorderRadius.circular(10),
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border: Border.all(
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color: isUserAdmin
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? Colors.indigo.shade200
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: Colors.teal.shade200,
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),
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),
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child: Text(
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isUserAdmin ? 'Administrator' : 'Bürger',
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style: TextStyle(
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fontSize: 11,
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fontWeight: FontWeight.bold,
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color: isUserAdmin
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? Colors.indigo.shade800
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: Colors.teal.shade800,
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),
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),
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),
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if (createdAt != null) ...[
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const SizedBox(width: 8),
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Text(
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'Seit ${DateFormat('dd.MM.yyyy').format(createdAt)}',
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style: TextStyle(
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fontSize: 11,
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color: Colors.grey.shade500,
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),
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),
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],
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],
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),
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],
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),
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trailing: PopupMenuButton<String>(
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icon: const Icon(Icons.more_vert),
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tooltip: 'Optionen',
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onSelected: (action) {
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if (action == 'toggleAdmin') {
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_toggleAdminRole(
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uid: uid,
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email: email,
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displayName: name,
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currentIsAdmin: isUserAdmin,
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currentAdminUid: currentAdminUid,
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);
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}
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},
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itemBuilder: (ctx) => [
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PopupMenuItem(
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value: 'toggleAdmin',
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enabled: !(isUserAdmin && isCurrentUser),
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child: Row(
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children: [
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Icon(
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isUserAdmin
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? Icons.remove_moderator
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: Icons.add_moderator,
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size: 20,
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color: isUserAdmin
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? Colors.red
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: Colors.indigo.shade700,
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),
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const SizedBox(width: 10),
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Text(
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isUserAdmin
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? 'Admin-Rechte entziehen'
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: 'Zum Admin ernennen',
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style: TextStyle(
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color: isUserAdmin
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? Colors.red
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: Colors.indigo.shade700,
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),
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),
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],
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),
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),
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],
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),
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);
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},
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);
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},
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);
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},
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),
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),
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],
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),
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);
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}
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}
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