1 files changed, 173 insertions, 0 deletions
diff --git a/lib/scan_page.dart b/lib/scan_page.dart
new file mode 100644
index 0000000..d21ade7
--- /dev/null
+++ b/lib/scan_page.dart
@@ -0,0 +1,173 @@
+import 'dart:io' show Platform;
+
+import 'package:badge/device_details.dart';
+import 'package:badge/device_scan_select.dart';
+import 'package:flutter/material.dart';
+import 'package:flutter_blue_plus/flutter_blue_plus.dart';
+import 'package:logger/logger.dart';
+import 'package:permission_handler/permission_handler.dart';
+
+var logger = Logger(printer: PrettyPrinter());
+
+class ScanPage extends StatefulWidget {
+  const ScanPage({super.key, required this.title});
+
+  // Original doc: Fields in a Widget subclass are always marked "final".
+
+  final String title;
+
+  @override
+  State<ScanPage> createState() => _ScanPageState();
+}
+
+class _ScanPageState extends State<ScanPage> {
+  List<ScanResult> scanResults = [];
+  bool isScanning = false;
+
+  ScanResult? selectedDevice;
+
+  void _doConnect() async {
+    var dev = selectedDevice?.device;
+    if (dev == null) return;
+    //???
+    Navigator.push(
+      context,
+      MaterialPageRoute(
+        builder: (context) => DeviceDetailsScreen(btDevice: dev),
+      ),
+    );
+  }
+
+  void _doScan() async {
+    var system = await FlutterBluePlus.systemDevices([]);
+    for (var d in system) {
+      logger.i('${d.platformName} already connected to! ${d.remoteId}');
+    }
+
+    setState(() {
+      selectedDevice = null;
+      scanResults = [];
+      isScanning = true;
+    });
+    var subscription = FlutterBluePlus.scanResults.listen(
+      onScanResult,
+      onError: (e) => logger.e(e),
+    );
+    // either this, or the cancel in the finally block, should do the same?
+    FlutterBluePlus.cancelWhenScanComplete(subscription);
+
+    try {
+      if (Platform.isAndroid) {
+        // Ehhhh... can't have both keyword/services
+        await FlutterBluePlus.startScan(
+          withKeywords: ["NimBLE"],
+          timeout: Duration(seconds: 5),
+        );
+      } else {
+        // for Linux, which can't do advNames (but platformname, for whatever reason)
+        // msd doesn't work, either????
+        await FlutterBluePlus.startScan(
+          //withMsd: [MsdFilter(0xffff, data: ascii.encode("uvok"))],
+          timeout: Duration(seconds: 5),
+        );
+      }
+
+      // wait for scanning to stop
+      await FlutterBluePlus.isScanning.where((val) => val == false).first;
+    } finally {
+      subscription.cancel();
+      setState(() {
+        isScanning = false;
+      });
+    }
+  }
+
+  void onScanResult(List<ScanResult> results) {
+    if (results.isNotEmpty) {
+      for (var r in results.where(
+        (d) => d.rssi > -90 && !_deviceInResults(d),
+      )) {
+        logger.i(
+          '${r.device.remoteId}: "${r.device.platformName}" / "${r.device.advName}" / "${r.advertisementData.advName}" found!',
+        );
+        scanResults.add(r);
+      }
+      setState(() {});
+    }
+  }
+
+  bool _deviceInResults(ScanResult incomingDev) => scanResults.any(
+    (existingDev) => existingDev.device.remoteId == incomingDev.device.remoteId,
+  );
+
+  Future getPermissions() async {
+    try {
+      await Permission.bluetooth.request();
+    } catch (e) {
+      logger.e(e.toString());
+    }
+  }
+
+  void btHandler(BluetoothAdapterState event) {
+    logger.i(event);
+    switch (event) {
+      case BluetoothAdapterState.on:
+        break;
+      default:
+        break;
+    }
+  }
+
+  @override
+  void initState() {
+    super.initState();
+    getPermissions();
+    FlutterBluePlus.adapterState.listen(btHandler);
+  }
+
+  @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),
+            Row(
+              mainAxisAlignment: MainAxisAlignment.center,
+              spacing: 15.0,
+              children: [
+                ElevatedButton(
+                  onPressed: isScanning ? null : _doScan,
+                  child: isScanning ? Text("Scanning...") : Text("Start scan"),
+                ),
+                ElevatedButton(
+                  onPressed: (selectedDevice == null || isScanning)
+                      ? null
+                      : _doConnect,
+                  child: Text("Connect"),
+                ),
+              ],
+            ),
+            Expanded(
+              child: DeviceScanSelection(
+                items: scanResults,
+                onItemSelected: (item) {
+                  setState(() => selectedDevice = item);
+                },
+              ),
+            ),
+          ],
+        ),
+      ),
+    );
+  }
+}