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main.dart
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import 'dart:async';
import 'package:example/models/user.dart';
import 'package:flutter/material.dart';
import 'package:loon/loon.dart';
import 'package:uuid/uuid.dart';
const uuid = Uuid();
void main() async {
WidgetsFlutterBinding.ensureInitialized();
Loon.configure(
persistor: FilePersistor(),
enableLogging: true,
);
await Loon.hydrate();
runApp(const MyApp());
}
class MyApp extends StatelessWidget {
const MyApp({super.key});
@override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Loon Demo',
theme: ThemeData(
colorScheme: ColorScheme.fromSeed(seedColor: Colors.blueAccent),
useMaterial3: true,
),
home: const MyHomePage(title: 'Loon'),
);
}
}
class MyHomePage extends StatefulWidget {
const MyHomePage({super.key, required this.title});
final String title;
@override
State<MyHomePage> createState() => _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> {
final _controller = TextEditingController();
@override
initState() {
super.initState();
_controller.addListener(() {
setState(() {});
});
}
Future<void> _showEditDialog(Document<UserModel> doc) async {
final initialUser = doc.get()!;
return showDialog(
context: context,
builder: (BuildContext context) {
return DocumentStreamBuilder(
doc: doc,
builder: (context, userSnap) {
final user = userSnap!.data;
return AlertDialog(
title: const Text('Edit name'),
content: TextFormField(
initialValue: user.name,
onChanged: (updatedName) {
userSnap.doc.update(
user.copyWith(name: updatedName),
);
},
),
actions: [
TextButton(
child: const Text('Cancel'),
onPressed: () {
doc.update(initialUser.data);
Navigator.of(context).pop();
},
),
TextButton(
child: const Text('Done'),
onPressed: () {
Navigator.of(context).pop();
},
),
],
);
},
);
},
);
}
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
backgroundColor: Theme.of(context).colorScheme.inversePrimary,
title: Text(widget.title),
),
body: Center(
child: Column(
children: [
SizedBox(
width: 300,
child: TextField(
controller: _controller,
decoration: const InputDecoration(hintText: 'Search users'),
),
),
Expanded(
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: [
Text(
'Users',
style: Theme.of(context).textTheme.headlineSmall,
),
const Padding(padding: EdgeInsets.only(top: 16)),
QueryStreamBuilder(
query: UserModel.store.where(
(userSnap) =>
userSnap.data.name.startsWith(_controller.text),
),
builder: (context, usersSnap) {
return ListView.builder(
shrinkWrap: true,
itemCount: usersSnap.length,
itemBuilder: (context, index) {
final userSnap = usersSnap[index];
final user = userSnap.data;
return Row(
mainAxisAlignment: MainAxisAlignment.center,
children: [
Text(user.name),
TextButton(
onPressed: () {
_showEditDialog(userSnap.doc);
},
child: const Text('Edit'),
),
TextButton(
onPressed: () {
UserModel.store.doc(userSnap.id).delete();
},
child: Text(
'Remove',
style: Theme.of(context)
.textTheme
.bodyMedium!
.copyWith(
color: Colors.red,
),
),
),
],
);
},
);
},
),
],
),
),
],
),
),
floatingActionButton: Container(
padding: const EdgeInsets.symmetric(vertical: 0, horizontal: 10.0),
child: Row(
mainAxisAlignment: MainAxisAlignment.end,
mainAxisSize: MainAxisSize.min,
children: [
FloatingActionButton(
onPressed: () {
final id = uuid.v4();
final doc = UserModel.store.doc(id);
if (!doc.exists()) {
UserModel.store.doc(id).create(UserModel(name: 'User $id'));
}
},
child: const Icon(Icons.add),
),
const SizedBox(width: 24),
FloatingActionButton(
onPressed: () {
UserModel.store.delete();
},
child: const Icon(Icons.delete),
),
],
),
),
);
}
}