eagletracker/lib/deviceSelection.dart

import 'package:flutter/material.dart';
import 'package:flutter_blue_plus/flutter_blue_plus.dart';
import 'package:gps_map_flowpoint/deviceFlowMap.dart';

class DeviceSelection extends StatefulWidget {
  const DeviceSelection({super.key, required this.title});

  final String title;

  @override
  State<DeviceSelection> createState() => _DeviceSelectionState();
}

class _DeviceSelectionState extends State<DeviceSelection> {
  // List to hold the scanned devices
  List<ScanResult> scanResults = [];
  TextEditingController tecSearch = TextEditingController();
  bool isScanning = false;

  // Initialize Bluetooth scanning and subscription in initState
  @override
  void initState() {
    super.initState();
    FlutterBluePlus.isSupported.then((isSupported) {
      if (!isSupported) {
        showDialog(
          context: context,
          builder: (context) {
            return AlertDialog(
              title: Text("Bluetooth non activé"),
              content: Text(
                  "Le Bluetooth n'est pas activé sur cet appareil. Veillez l'activer pour continuer."),
              actions: [
                TextButton(
                  onPressed: () {
                    Navigator.of(context).pop();
                  },
                  child: Text("OK"),
                ),
              ],
            );
          },
        );
      }
    });

    FlutterBluePlus.onScanResults.listen(
      (results) {
        setState(() {
          scanResults = results;
        });
      },
      onError: (e) => print(e),
    );
  }

  @override
  Widget build(BuildContext context) {
    // Filtered list of devices
    List<ScanResult> filteredDevices = scanResults
        .where((result) => result.device.name
            .toLowerCase()
            .contains(tecSearch.text.toLowerCase()))
        .toList();

    return Scaffold(
      appBar: AppBar(
        backgroundColor: Colors.blue,
        title: Text("Selection de l'appareil BLE",
            style: TextStyle(color: Colors.white)),
      ),
      body: Column(
        children: [
          Padding(
            padding: const EdgeInsets.all(16.0),
            child: TextFormField(
              controller: tecSearch,
              decoration: InputDecoration(
                hintText: 'Rechercher un appareil',
                prefixIcon: Icon(Icons.search),
              ),
              onChanged: (value) {
                setState(() {});
              },
            ),
          ),
          SizedBox(height: 16.0),
          Expanded(
            child: ListView.builder(
              itemCount: filteredDevices.length,
              itemBuilder: (context, index) {
                ScanResult result = filteredDevices[index];
                return ListTile(
                  title: Text(result.device.name),
                  subtitle: Text(result.device.id.id),
                  onTap: () {
                    //Stop scanning when a device is selected
                    FlutterBluePlus.stopScan();
                    setState(() {
                      isScanning = false;
                    });

                    Navigator.push(
                      context,
                      MaterialPageRoute(
                        builder: (context) => DeviceFlowMap(
                          title: 'GPS Map Flowpoint',
                          deviceName: result.device.name,
                          deviceAddress: result.device.id.id,
                        ),
                      ),
                    );
                  },
                );
              },
            ),
          ),
        ],
      ),
      floatingActionButton: FloatingActionButton(
        backgroundColor: Colors.blue,
        onPressed: () {
          print('Scanning');
          setState(() {
            isScanning = !isScanning;
            if (isScanning) {
              FlutterBluePlus.startScan();
            } else {
              FlutterBluePlus.stopScan();
            }
          });
        },
        child: Icon(isScanning ? Icons.stop : Icons.play_arrow,
            color: Colors.white),
      ),
    );
  }
}