1 files changed, 83 insertions, 0 deletions
diff --git a/lib/esense_input.dart b/lib/esense_input.dart
new file mode 100644
index 0000000..705bd5f
--- /dev/null
+++ b/lib/esense_input.dart
@@ -0,0 +1,83 @@
+import 'dart:async';
+import 'dart:io';
+
+import 'package:esense_flutter/esense.dart';
+import 'package:flutter/material.dart';
+import 'package:permission_handler/permission_handler.dart';
+
+class ESenseInput {
+  static final instance = ESenseInput._();
+
+  ESenseManager eSenseManager = ESenseManager('unknown');
+  ValueNotifier<String> deviceStatus = ValueNotifier('');
+
+  String eSenseDeviceName = '';
+  bool connected = false;
+  bool sampling = false;
+
+  ESenseInput._() {
+    _listenToESense();
+  }
+
+  Future<void> _askForPermissions() async {
+    if (!Platform.isAndroid && !Platform.isIOS) return;
+    if (!(await Permission.bluetoothScan.request().isGranted &&
+        await Permission.bluetoothConnect.request().isGranted)) {
+      print(
+          'WARNING - no permission to use Bluetooth granted. Cannot access eSense device.');
+    }
+    // for some strange reason, Android requires permission to location for Bluetooth to work.....?
+    if (Platform.isAndroid) {
+      if (!(await Permission.locationWhenInUse.request().isGranted)) {
+        print(
+            'WARNING - no permission to access location granted. Cannot access eSense device.');
+      }
+    }
+  }
+
+  StreamSubscription _listenToESense() {
+    // if you want to get the connection events when connecting,
+    // set up the listener BEFORE connecting...
+    return eSenseManager.connectionEvents.listen((event) {
+      print('CONNECTION event: $event');
+
+      // when we're connected to the eSense device, we can start listening to events from it
+      // if (event.type == ConnectionType.connected) _listenToESenseEvents();
+
+      connected = false;
+      switch (event.type) {
+        case ConnectionType.connected:
+          deviceStatus.value = 'connected';
+          connected = true;
+          break;
+        case ConnectionType.unknown:
+          deviceStatus.value = 'unknown';
+          break;
+        case ConnectionType.disconnected:
+          deviceStatus.value = 'disconnected';
+          sampling = false;
+          break;
+        case ConnectionType.device_found:
+          deviceStatus.value = 'device_found';
+          break;
+        case ConnectionType.device_not_found:
+          deviceStatus.value = 'device_not_found';
+          break;
+      }
+    });
+  }
+
+  Future<void> connectToESense(String deviceName) async {
+    if (!connected) {
+      await _askForPermissions();
+      print('Trying to connect to eSense device namend \'$deviceName\'');
+      eSenseDeviceName = deviceName;
+      eSenseManager.deviceName = deviceName;
+      connected = await eSenseManager.connect();
+      print('Trying to connect to eSense device namend \'${eSenseManager.deviceName}\'');
+
+      deviceStatus.value = connected ? 'connecting...' : 'connection failed';
+      print(deviceStatus.value);
+    }
+  }
+}