mirror of
https://github.com/hackku21/loc-chain-app.git
synced 2025-06-13 12:54:05 +00:00
auto connects and send the message accrocced
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parent
d56bad22d0
commit
388ffb4897
@ -1,5 +1,4 @@
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import 'package:flutter/material.dart';
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import 'package:loc_chain_app/util/bluetooth.dart';
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import 'package:shared_preferences/shared_preferences.dart';
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import 'package:loc_chain_app/widgets/navbar.dart';
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import 'package:flutter_udid/flutter_udid.dart';
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@ -15,8 +14,6 @@ class App extends StatelessWidget {
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// This widget is the root of your application.
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@override
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Widget build(BuildContext context) {
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Connect.start();
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return MaterialApp(
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title: 'Loc-Chain',
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theme: ThemeData(
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@ -1,7 +1,9 @@
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import 'dart:io';
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import 'dart:typed_data';
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import 'package:flutter/material.dart';
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import 'package:flutter_udid/flutter_udid.dart';
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import 'package:loc_chain_app/util/bluetooth.dart';
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import 'package:loc_chain_app/util/transaction_manager.dart';
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import 'package:nearby_connections/nearby_connections.dart';
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class HomePage extends StatefulWidget {
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HomePage({Key? key, required this.title}) : super(key: key);
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@ -12,72 +14,201 @@ class HomePage extends StatefulWidget {
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}
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class _HomePageState extends State<HomePage> {
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final Future<String> _id = FlutterUdid.consistentUdid;
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Connect connector = Connect();
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Map<String, Transaction> transactionMap = Map();
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// String getId() =>
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// SharedPreferences.getInstance().then((s) => s.getString('id') ?? '0');
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void refreshTransactions() {
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setState(() {
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transactionMap = Connect.transactionMap;
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Connect.context = context;
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@override
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void initState() {
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super.initState();
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WidgetsBinding.instance!.addPostFrameCallback((_) {
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getUUID();
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startAdvertising();
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startDiscovery();
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});
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}
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static late String userName;
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final Strategy strategy = Strategy.P2P_STAR;
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Map<String, ConnectionInfo> endpointMap = Map();
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@override
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Widget build(BuildContext context) {
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return Scaffold(
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appBar: AppBar(
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title: Text(widget.title),
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),
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body: FutureBuilder<String>(
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future: _id, // a previously-obtained Future<String> or null
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builder: (BuildContext context, AsyncSnapshot<String> snapshot) {
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String content = "Loading id...";
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if (snapshot.hasData) {
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content = "ID: ${snapshot.data!}";
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}
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List<Card> transactions = List.generate(
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transactionMap.length,
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(index) {
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Transaction t = transactionMap.values.elementAt(index);
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return Card(
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child: Row(
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children: [Text(t.hash), Text(t.pubKey)],
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),
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);
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return Center(
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child: Padding(
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padding: const EdgeInsets.all(8.0),
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child: ListView(
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children: <Widget>[
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Text("User Name: " + userName),
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Divider(),
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Text("Number of connected devices: ${endpointMap.length}"),
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ElevatedButton(
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child: Text("Stop All Endpoints"),
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onPressed: () async {
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await Nearby().stopAllEndpoints();
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setState(() {
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endpointMap.clear();
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});
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},
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);
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return ListView(
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children: <Widget>[
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Container(
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child: Text(content),
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),
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] +
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transactions,
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);
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}),
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floatingActionButton: FloatingActionButton(
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onPressed: () {
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refreshTransactions();
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try {
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Connect.stop();
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Connect.start();
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} catch (e) {
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print(e);
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}
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},
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child: Icon(Icons.refresh_sharp),
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),
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Divider(),
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Text(
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"Sending Data",
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),
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ElevatedButton(
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child: Text("Send Bytes Payload"),
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onPressed: () async {
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sendPayload();
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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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String genPayload(ConnectionInfo value) {
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print("Sender ID: $userName");
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print("Receiver ID: ${value.endpointName}");
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var dateTime = DateTime.now();
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print('Milliseconds since Epoch: ${dateTime.millisecondsSinceEpoch}');
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String payload = userName +
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":" +
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value.endpointName +
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":" +
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dateTime.millisecondsSinceEpoch.toString();
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return payload;
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}
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void sendPayload() {
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endpointMap.forEach((key, value) {
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String a = genPayload(value);
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showSnackbar("Sending $a to ${value.endpointName}, id: $key");
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Nearby().sendBytesPayload(key, Uint8List.fromList(a.codeUnits));
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});
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}
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void showSnackbar(dynamic a) {
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ScaffoldMessenger.of(context).showSnackBar(SnackBar(
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content: Text(a.toString()),
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));
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}
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Future<void> reportExposure() async {}
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void getUUID() async {
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userName = await FlutterUdid.consistentUdid;
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}
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void stopAll() async {
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await Nearby().stopAllEndpoints();
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await Nearby().stopAdvertising();
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await Nearby().stopDiscovery();
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setState(() {});
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}
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void startDiscovery() async {
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try {
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userName = await FlutterUdid.consistentUdid;
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bool a = await Nearby().startDiscovery(
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userName,
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strategy,
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onEndpointFound: (id, name, serviceId) {
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print("userName = $userName");
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print("id = $id");
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Nearby().requestConnection(
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userName,
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id,
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onConnectionInitiated: (id, info) {
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onConnectionInit(id, info);
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sleep(Duration(microseconds: 500));
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sendPayload();
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},
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onConnectionResult: (id, status) {
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showSnackbar(status);
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},
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onDisconnected: (id) {
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setState(() {
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endpointMap.remove(id);
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});
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showSnackbar(
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"Disconnected from: ${endpointMap[id]!.endpointName}, id $id");
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},
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);
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},
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onEndpointLost: (id) {
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showSnackbar(
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"Lost discovered Endpoint: ${endpointMap[id]!.endpointName}, id $id");
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},
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);
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showSnackbar("DISCOVERING: " + a.toString());
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} catch (e) {
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showSnackbar(e);
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}
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setState(() {});
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}
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void startAdvertising() async {
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try {
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userName = await FlutterUdid.consistentUdid;
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bool a = await Nearby().startAdvertising(
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userName,
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strategy,
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onConnectionInitiated: (id, info) {
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onConnectionInit(id, info);
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sleep(Duration(microseconds: 500));
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sendPayload();
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}, //advertisingOnConnectionInit,
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onConnectionResult: (id, status) {
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print("userName = $userName");
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print("id = $id");
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print(status);
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showSnackbar(status);
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},
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onDisconnected: (id) {
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showSnackbar(
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"Disconnected: ${endpointMap[id]!.endpointName}, id $id");
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setState(() {
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endpointMap.remove(id);
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});
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},
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);
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showSnackbar("ADVERTISING: " + a.toString());
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} catch (exception) {
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showSnackbar(exception);
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}
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setState(() {});
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}
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/// Called upon Connection request (on both devices)
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/// Both need to accept connection to start sending/receiving
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void onConnectionInit(String id, ConnectionInfo info) {
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setState(() {
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endpointMap[id] = info;
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});
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Nearby().acceptConnection(
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id,
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onPayLoadRecieved: (endid, payload) async {
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if (payload.type == PayloadType.BYTES) {
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String str = String.fromCharCodes(payload.bytes!);
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// first device recives here
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print("Receiving:");
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print("${str.split(":")}");
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showSnackbar(endid + ": " + str);
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}
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},
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onPayloadTransferUpdate: (endid, payloadTransferUpdate) {
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if (payloadTransferUpdate.status == PayloadStatus.IN_PROGRESS) {
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print(payloadTransferUpdate.bytesTransferred);
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} else if (payloadTransferUpdate.status == PayloadStatus.FAILURE) {
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print("failed");
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showSnackbar(endid + ": FAILED to transfer file");
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} else if (payloadTransferUpdate.status == PayloadStatus.SUCCESS) {
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showSnackbar(
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"$endid success, total bytes = ${payloadTransferUpdate.totalBytes}");
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}
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},
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);
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}
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}
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