feat: check if bluetooth is enabled; ability to disconnect from ESense

android/app/src/main/AndroidManifest.xml

@@ -4,9 +4,7 @@
 <uses-permission android:name="android.permission.MANAGE_EXTERNAL_STORAGE" />
 <uses-permission android:name="android.permission.READ_INTERNAL_STORAGE" />
 <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
-    <uses-permission
-        android:name="android.permission.BLUETOOTH"
-        android:maxSdkVersion="30" />
+    <uses-permission android:name="android.permission.BLUETOOTH" />
     <uses-permission
         android:name="android.permission.BLUETOOTH_ADMIN"
         android:maxSdkVersion="30" />

lib/utils/esense_input.dart

@@ -29,21 +29,30 @@ class ESenseInput {
     _listenToESense();
   }
 
-  Future<void> _askForPermissions() async {
-    if (!Platform.isAndroid && !Platform.isIOS) return;
+  Future<bool> _askForPermissions() async {
+    if (!Platform.isAndroid && !Platform.isIOS) return false;
+    if (!await Permission.bluetooth.serviceStatus.isEnabled) {
+      deviceStatus.value = "Bluetooth is disabled!";
+      return false;
+    }
     if (!(await Permission.bluetoothScan.request().isGranted &&
         await Permission.bluetoothConnect.request().isGranted &&
         await Permission.bluetooth.request().isGranted)) {
       print(
           'WARNING - no permission to use Bluetooth granted. Cannot access eSense device.');
+      deviceStatus.value = "Insufficiant Permissions";
+      return false;
     }
     // 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.');
+        deviceStatus.value = "Insufficiant Permissions";
+        return false;
       }
     }
+    return true;
   }
 
   void _listenToESense() {
@@ -151,7 +160,8 @@ class ESenseInput {
 
   Future<void> connectToESense(String deviceName) async {
     if (!connected) {
-      await _askForPermissions();
+      bool permissionSuccessfull = await _askForPermissions();
+      if (!permissionSuccessfull) return;
       print('Trying to connect to eSense device namend \'$deviceName\'');
       eSenseDeviceName = deviceName;
       eSenseManager.deviceName = deviceName;

lib/widgets/connection_status_button.dart

@@ -24,7 +24,11 @@ class ConnectionStatusButton extends StatelessWidget {
                   deviceStatus: ESenseInput.instance.deviceStatus,
                   connect: (String name) {
                     ESenseInput.instance.connectToESense(name);
-                    });
+                  },
+                  disconnect: () {
+                    ESenseInput.instance.eSenseManager.disconnect();
+                  },
+                );
               },
             ),
         label: Text(deviceStatus),

lib/widgets/esense_connect_dialog.dart

@@ -1,10 +1,16 @@
 import 'package:flutter/material.dart';
+import 'package:sense_the_rhythm/utils/esense_input.dart';
 
 class ESenseConnectDialog extends StatefulWidget {
   final void Function(String) connect;
+  final VoidCallback disconnect;
   final ValueNotifier<String> deviceStatus;
+
   const ESenseConnectDialog(
-      {super.key, required this.deviceStatus, required this.connect});
+      {super.key,
+      required this.deviceStatus,
+      required this.connect,
+      required this.disconnect});
 
   @override
   State<ESenseConnectDialog> createState() => _ESenseConnectDialogState();
@@ -15,6 +21,9 @@ class _ESenseConnectDialogState extends State<ESenseConnectDialog> {
 
   @override
   Widget build(BuildContext context) {
+    return ValueListenableBuilder(
+        valueListenable: widget.deviceStatus,
+        builder: (BuildContext context, String deviceStatus, Widget? child) {
           return AlertDialog(
             title: const Text('Connect to ESense'),
             content: Column(mainAxisSize: MainAxisSize.min, children: [
@@ -31,22 +40,24 @@ class _ESenseConnectDialogState extends State<ESenseConnectDialog> {
                 ),
               ),
               // Text(eSenseDeviceName),
-        ValueListenableBuilder(
-            valueListenable: widget.deviceStatus,
-            builder: (BuildContext context, String value, Widget? child) {
-              return Text(value);
-            }),
+              Text(deviceStatus)
             ]),
             actions: <Widget>[
               TextButton(
                 onPressed: () => Navigator.pop(context, 'Cancel'),
                 child: const Text('Close'),
               ),
-        TextButton(
+              ESenseInput.instance.connected
+                  ? TextButton(
+                      onPressed: () => widget.disconnect(),
+                      child: const Text('Disconnect'),
+                    )
+                  : TextButton(
                       onPressed: () => widget.connect(eSenseDeviceName),
                       child: const Text('Connect'),
                     ),
             ],
           );
+        });
   }
 }

lib/widgets/level_list_entry.dart

@@ -28,7 +28,11 @@ class LevelListEntry extends StatelessWidget {
           deviceStatus: ESenseInput.instance.deviceStatus,
           connect: (String name) {
             ESenseInput.instance.connectToESense(name);
-            });
+          },
+          disconnect: () {
+            ESenseInput.instance.eSenseManager.disconnect();
+          },
+        );
       },
     );
   }