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// Copyright (C) 2025, uvok cheetah
//
// 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, either version 3 of the License, or
// (at your option) any later version.
//
// 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 <https://www.gnu.org/licenses/>.
import 'dart:io';
import 'package:uvok_epaper_badge/control/scanner_controller.dart';
import 'package:uvok_epaper_badge/widgets/device_details.dart';
import 'package:uvok_epaper_badge/widgets/device_scan_select.dart';
import 'package:uvok_epaper_badge/model/device/device.dart';
import 'package:flutter/material.dart';
import 'package:logger/logger.dart';
import 'package:permission_handler/permission_handler.dart';
import 'package:uvok_epaper_badge/model/connection/device_connection.dart';
import 'package:uvok_epaper_badge/model/device_connection_factory.dart';
var logger = Logger();
class ScanPage extends StatefulWidget {
const ScanPage({super.key, required this.title, required this.deviceScanner});
// Original doc: Fields in a Widget subclass are always marked "final".
final String title;
final ScannerController deviceScanner;
@override
State<ScanPage> createState() => _ScanPageState();
}
class _ScanPageState extends State<ScanPage> {
Device? selectedDevice;
void _doConnect() async {
final Device? dev = selectedDevice;
if (dev == null) return;
final DeviceConnection connection =
DeviceConnectionFactory.createConnection(dev);
await Navigator.push(
context,
MaterialPageRoute(
builder: (context) =>
DeviceDetailsScreen(device: dev, deviceConnection: connection),
),
);
}
void _doScan() async {
setState(() {
selectedDevice = null;
});
await getPermissions();
await widget.deviceScanner.startScan();
}
Future getPermissions() async {
// avoid spamming log with "unsupported" messages.
if (Platform.isLinux) return;
try {
var status = await Permission.bluetooth.request();
logger.i("New BLE permission status: $status");
status = await Permission.bluetoothScan.request();
logger.i("New BLE scan permission status: $status");
status = await Permission.bluetoothConnect.request();
logger.i("New BLE connect permission status: $status");
} catch (e) {
logger.e(e.toString());
}
}
@override
void initState() {
super.initState();
}
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
backgroundColor: Theme.of(context).colorScheme.inversePrimary,
title: Text(widget.title),
),
body: Center(
child: Column(
// TRY THIS: Invoke "debug painting" (choose the "Toggle Debug Paint"
// action in the IDE, or press "p" in the console), to see the
// wireframe for each widget.
mainAxisAlignment: MainAxisAlignment.center,
spacing: 24,
children: <Widget>[
SizedBox(height: 15),
StreamBuilder(
stream: widget.deviceScanner.availabilityStream,
builder: (saCtx, scanAvailability) {
return StreamBuilder(
stream: widget.deviceScanner.statusStream,
initialData: ScanStatus.idle,
builder: (ssCtx, scanStatus) {
final bool isScanning =
scanStatus.data == ScanStatus.scanning;
final bool scanAvailable =
scanAvailability.data == ScanAvailability.available;
final bool allowConnect =
selectedDevice == null || isScanning || !scanAvailable;
Text scanBtn;
if (!scanAvailable) {
scanBtn = Text("No available adapter.");
} else if (isScanning) {
scanBtn = Text("Scanning...");
} else {
scanBtn = Text("Start scan");
}
return Row(
mainAxisAlignment: MainAxisAlignment.center,
spacing: 15.0,
children: [
ElevatedButton(
onPressed: isScanning || !scanAvailable
? null
: _doScan,
child: scanBtn,
),
ElevatedButton(
onPressed: allowConnect ? null : _doConnect,
child: Text("Connect"),
),
],
);
},
);
},
),
StreamBuilder(
stream: widget.deviceScanner.scanResultsStream,
initialData: <Device>[],
builder: (srCtx, scanResults) {
return DeviceScanSelection(
items: scanResults.data ?? [],
onItemSelected: (item) {
setState(() => selectedDevice = item);
},
);
},
),
],
),
),
);
}
}
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