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import 'dart:async'; | |
import 'package:http/http.dart' as http; | |
import 'dart:convert'; | |
import 'package:flutter/material.dart'; | |
Future<void> main() async { | |
runApp(const MyApp()); | |
} | |
class MyApp extends StatefulWidget { | |
const MyApp({Key? key}) : super(key: key); | |
@override | |
_MyAppState createState() => _MyAppState(); | |
} | |
class _MyAppState extends State<MyApp> { | |
final myController = TextEditingController(); | |
@override | |
Widget build(BuildContext context) { | |
return MaterialApp( | |
// * The onboarding screen (first screen) | |
home: Scaffold( | |
appBar: AppBar( | |
title: const Text('Get yourself a Snackbar !'), | |
), | |
body: Builder( | |
builder: (context) => Center( | |
child: Column(children: [ | |
const Text('What\'s your @sign ?'), | |
TextField( | |
controller: myController, | |
textAlign: TextAlign.center, | |
), | |
ElevatedButton( | |
onPressed: () { | |
setState(() { | |
Navigator.push( | |
context, | |
MaterialPageRoute( | |
builder: (context) => HomeScreen( | |
currentAtsign: myController.text), | |
) | |
); | |
}); | |
}, | |
child: const Text('get ready for snacks!'), | |
) | |
] | |
) | |
) | |
) | |
), | |
); | |
} | |
} | |
class HomeScreen extends StatefulWidget { | |
final String currentAtsign; | |
const HomeScreen({Key? key, required this.currentAtsign}) : super(key: key); | |
@override | |
State<HomeScreen> createState() => _HomeScreenState(); | |
} | |
class _HomeScreenState extends State<HomeScreen> { | |
Snack lastsnack = Snack(snack: 'hungry'); | |
late Timer timer; | |
@override | |
void initState() { | |
super.initState(); | |
checkApi(); | |
timer = Timer.periodic(const Duration(seconds: 2), (Timer t) => checkApi()); | |
} | |
@override | |
Widget build(BuildContext context) { | |
String? currentAtsign = widget.currentAtsign; | |
return Scaffold( | |
appBar: AppBar( | |
title: const Text('Snackbar receiver'), | |
), | |
body: Center( | |
child: Column( | |
children: [ | |
const Text('Waiting for snacks !'), | |
Text('Current @sign: $currentAtsign'), | |
const Spacer(flex: 1), | |
], | |
), | |
), | |
); | |
} | |
void checkApi() { | |
setState(() { | |
checkForSnacks(context, widget.currentAtsign, lastsnack); | |
}); | |
} | |
} | |
Future<void> checkForSnacks(context, String atsign, Snack lastsnack) async { | |
String mysnack = await getAtsignData(atsign); | |
if (mysnack != lastsnack.snack) { | |
popSnackBar(context, mysnack); | |
} | |
lastsnack.snack = mysnack; | |
} | |
Future<String> getAtsignData(String atsign) async { | |
String lookup = 'https://wavi.ng/api?atp=snackbar.fourballcorporate9$atsign'; | |
http.Response result = await http.get(Uri.parse(lookup)); | |
var snackMap = jsonDecode(result.body); | |
// Known key 'snackbar' known NAMESPACE 'fourballcorporate9` | |
var snackJson = jsonDecode(snackMap[0]['snackbar.fourballcorporate9']); | |
var snack = Snack.fromJson(snackJson); | |
return ((snack.snack.toString())); | |
} | |
void popSnackBar(context, String snack) { | |
final snackBar = SnackBar( | |
content: Text('Yay! A$snack ! '), | |
action: SnackBarAction( | |
label: 'Undo', | |
onPressed: () { | |
// Some code to undo the change. | |
}, | |
), | |
); | |
ScaffoldMessenger.of(context).showSnackBar(snackBar); | |
} | |
class Snack { | |
String snack; | |
Snack({ | |
required this.snack, | |
}); | |
Snack.fromJson(Map<String, dynamic> json) : snack = json['snack']; | |
Map<String, dynamic> toJson() => { | |
'"snack"': '"$snack"', | |
}; | |
} |
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