veilid/veilid-flutter/example/lib/app.dart

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import 'dart:async';
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import 'dart:convert';
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import 'package:flutter/material.dart';
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import 'package:flutter/services.dart';
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import 'package:veilid/veilid.dart';
import 'package:loggy/loggy.dart';
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import 'package:veilid_example/veilid_theme.dart';
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import 'log_terminal.dart';
import 'log.dart';
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import 'history_wrapper.dart';
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// Main App
class MyApp extends StatefulWidget {
const MyApp({Key? key}) : super(key: key);
@override
State<MyApp> createState() => _MyAppState();
}
class _MyAppState extends State<MyApp> with UiLoggy {
String _veilidVersion = 'Unknown';
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bool _startedUp = false;
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Stream<VeilidUpdate>? _updateStream;
Future<void>? _updateProcessor;
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final _debugHistoryWrapper = HistoryWrapper();
String? _errorText;
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@override
void initState() {
super.initState();
initPlatformState();
}
// Platform messages are asynchronous, so we initialize in an async method.
Future<void> initPlatformState() async {
String veilidVersion;
// Platform messages may fail, so we use a try/catch PlatformException.
// We also handle the message potentially returning null.
try {
veilidVersion = Veilid.instance.veilidVersionString();
} on Exception {
veilidVersion = 'Failed to get veilid version.';
}
// In case of hot restart shut down first
try {
await Veilid.instance.shutdownVeilidCore();
} on Exception {
//
}
// If the widget was removed from the tree while the asynchronous platform
// message was in flight, we want to discard the reply rather than calling
// setState to update our non-existent appearance.
if (!mounted) return;
setState(() {
_veilidVersion = veilidVersion;
});
}
Future<void> processLog(VeilidLog log) async {
StackTrace? stackTrace;
Object? error;
final backtrace = log.backtrace;
if (backtrace != null) {
stackTrace =
StackTrace.fromString("$backtrace\n${StackTrace.current.toString()}");
error = 'embedded stack trace for ${log.logLevel} ${log.message}';
}
switch (log.logLevel) {
case VeilidLogLevel.error:
loggy.error(log.message, error, stackTrace);
break;
case VeilidLogLevel.warn:
loggy.warning(log.message, error, stackTrace);
break;
case VeilidLogLevel.info:
loggy.info(log.message, error, stackTrace);
break;
case VeilidLogLevel.debug:
loggy.debug(log.message, error, stackTrace);
break;
case VeilidLogLevel.trace:
loggy.trace(log.message, error, stackTrace);
break;
}
}
Future<void> processUpdates() async {
var stream = _updateStream;
if (stream != null) {
await for (final update in stream) {
if (update is VeilidLog) {
await processLog(update);
} else if (update is VeilidAppMessage) {
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loggy.info("AppMessage: ${jsonEncode(update)}");
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} else if (update is VeilidAppCall) {
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loggy.info("AppCall: ${jsonEncode(update)}");
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} else {
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loggy.trace("Update: ${jsonEncode(update)}");
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}
}
}
}
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Future<void> toggleStartup(bool startup) async {
if (startup && !_startedUp) {
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var updateStream = await Veilid.instance.startupVeilidCore(
await getDefaultVeilidConfig("Veilid Plugin Example"));
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setState(() {
_updateStream = updateStream;
_updateProcessor = processUpdates();
_startedUp = true;
});
await Veilid.instance.attach();
} else if (!startup && _startedUp) {
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try {
await Veilid.instance.shutdownVeilidCore();
if (_updateProcessor != null) {
await _updateProcessor;
}
} finally {
setState(() {
_updateProcessor = null;
_updateStream = null;
_startedUp = false;
});
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}
}
}
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@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text('Veilid Plugin Version $_veilidVersion'),
),
body: Column(children: [
const Expanded(child: LogTerminal()),
Container(
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decoration: BoxDecoration(
color: materialBackgroundColor.shade100,
boxShadow: [
BoxShadow(
color: Colors.black.withOpacity(0.15),
spreadRadius: 4,
blurRadius: 4,
)
]),
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padding: const EdgeInsets.all(5.0),
child: Row(children: [
Expanded(
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child: pad(_debugHistoryWrapper.wrap(
setState,
TextField(
controller: _debugHistoryWrapper.controller,
decoration: newInputDecoration(
'Debug Command', _errorText, _startedUp),
textInputAction: TextInputAction.unspecified,
enabled: _startedUp,
onChanged: (v) {
setState(() {
_errorText = null;
});
},
onSubmitted: (String v) async {
try {
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if (v.isEmpty) {
return;
}
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var res = await Veilid.instance.debug(v);
loggy.info(res);
setState(() {
_debugHistoryWrapper.submit(v);
});
} on VeilidAPIException catch (e) {
setState(() {
_errorText = e.toDisplayError();
});
}
}),
))),
pad(
Column(children: [
const Text('Startup'),
Switch(
value: _startedUp,
onChanged: (bool value) async {
await toggleStartup(value);
}),
]),
),
pad(Column(children: [
const Text('Log Level'),
DropdownButton<LogLevel>(
value: loggy.level.logLevel,
onChanged: (LogLevel? newLevel) {
setState(() {
setRootLogLevel(newLevel);
});
},
items: const [
DropdownMenuItem<LogLevel>(
value: LogLevel.error, child: Text("Error")),
DropdownMenuItem<LogLevel>(
value: LogLevel.warning, child: Text("Warning")),
DropdownMenuItem<LogLevel>(
value: LogLevel.info, child: Text("Info")),
DropdownMenuItem<LogLevel>(
value: LogLevel.debug, child: Text("Debug")),
DropdownMenuItem<LogLevel>(
value: traceLevel, child: Text("Trace")),
DropdownMenuItem<LogLevel>(
value: LogLevel.all, child: Text("All")),
]),
])),
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]),
),
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]));
}
}