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main.dart
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main.dart
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/*
* This file is part of the EmblaCore Flutter package example
* Copyright (c) 2024 Miðeind ehf. <mideind@mideind.is>
* Original author: Sveinbjorn Thordarson
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, version 3.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
import 'package:flutter/material.dart';
import 'package:permission_handler/permission_handler.dart';
import 'package:embla_core/embla_core.dart';
const String kSoftwareTitle = 'EmblaCore Demo';
const String kDefaultPrompt = 'Smelltu á hnappinn til að byrja';
const String kListeningPrompt = 'Hlustandi...';
void main() {
WidgetsFlutterBinding.ensureInitialized();
// We call this static function to prepare for session
// functionality by preloading any required assets.
EmblaSession.prepare();
runApp(const MyApp());
}
class MyApp extends StatelessWidget {
const MyApp({super.key});
@override
Widget build(BuildContext context) {
return MaterialApp(
title: kSoftwareTitle,
theme: ThemeData(
primarySwatch: Colors.red,
),
home: const SessionPage(title: kSoftwareTitle),
);
}
}
class SessionPage extends StatefulWidget {
const SessionPage({super.key, required this.title});
final String title;
@override
State<SessionPage> createState() => _SessionPageState();
}
class _SessionPageState extends State<SessionPage> {
EmblaSession? session;
EmblaSessionConfig? config;
String msg = kDefaultPrompt;
final playIcon = const Icon(Icons.play_arrow);
final stopIcon = const Icon(Icons.stop);
var buttonIcon = const Icon(Icons.play_arrow);
void _stopSession() {
session!.cancel();
setState(() {
buttonIcon = playIcon;
msg = kDefaultPrompt;
});
}
Future _askForPermissions() async {
if (await Permission.microphone.isGranted != true) {
await Permission.microphone.request();
}
}
void _createConfigIfNeeded() {
if (config != null) {
return;
}
// The URL of the EmblaCore server to talk to. This is the production server.
const String serverURL = "https://api.mideind.is";
// Create new session config
config = EmblaSessionConfig(server: serverURL);
// Replace with your API key. You can obtain a key from
// Miðeind ehf. (mideind@mideind.is)
config!.apiKey = "";
config?.onStartStreaming = () {
setState(() {
buttonIcon = stopIcon;
msg = kListeningPrompt;
});
};
config?.onSpeechTextReceived = (String transcript, bool isFinal, Map<String, dynamic> data) {
setState(() {
msg = transcript;
});
};
config?.onQueryAnswerReceived = (dynamic answer) {
setState(() {
if (answer is Map && answer.containsKey('answer')) {
msg = "${answer['q']}\n\n${answer['answer']}";
}
});
};
config?.onError = (String error) {
setState(() {
msg = error;
buttonIcon = playIcon;
});
};
config?.onDone = () {
setState(() {
buttonIcon = playIcon;
if (msg == kListeningPrompt) {
msg = kDefaultPrompt;
}
});
};
config?.getLocation = () {
// Dummy location data. Replace with real location data
// in your app e.g. using the geolocator package.
return [64.1466, -21.9426];
};
}
void _startSession() {
_createConfigIfNeeded();
// Start the session
session = EmblaSession(config!);
session!.start();
setState(() {
buttonIcon = stopIcon;
});
}
void _buttonClick() async {
if (session != null && session!.isActive()) {
// Session is active, so terminate it
_stopSession();
return;
}
await _askForPermissions();
_startSession();
}
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text(widget.title),
),
body: Center(
child: Padding(
padding: const EdgeInsets.only(left: 20, right: 20, top: 30),
child: Column(
children: <Widget>[
Text(
msg,
style: Theme.of(context).textTheme.headlineSmall,
)
],
),
),
),
floatingActionButton: FloatingActionButton(
onPressed: _buttonClick,
child: buttonIcon,
),
);
}
}