Handle missing camera, e.g. on desktop.

Author: rkistner

demos/supabase-todolist/lib/attachments/camera_helpers.dart

@@ -1,5 +1,6 @@
 import 'package:camera/camera.dart';
 import 'package:flutter/widgets.dart';
+import 'package:powersync_flutter_demo/powersync.dart';
 
 late final CameraDescription? camera;
 
@@ -8,8 +9,14 @@ Future<CameraDescription?> setupCamera() async {
   // can be called before `runApp()`
   WidgetsFlutterBinding.ensureInitialized();
   // Obtain a list of the available cameras on the device.
-  final cameras = await availableCameras();
-  // Get a specific camera from the list of available cameras.
-  final camera = cameras.isNotEmpty ? cameras.first : null;
-  return camera;
+  try {
+    final cameras = await availableCameras();
+    // Get a specific camera from the list of available cameras.
+    final camera = cameras.isNotEmpty ? cameras.first : null;
+    return camera;
+  } catch (e) {
+    // Camera is not supported on all platforms
+    log.warning('Failed to setup camera: $e');
+    return null;
+  }
 }

demos/supabase-todolist/lib/widgets/todo_item_widget.dart

@@ -1,5 +1,6 @@
 import 'package:flutter/material.dart';
 import 'package:powersync_flutter_demo/app_config.dart';
+import 'package:powersync_flutter_demo/attachments/camera_helpers.dart';
 import 'package:powersync_flutter_demo/attachments/photo_widget.dart';
 import 'package:powersync_flutter_demo/attachments/queue.dart';
 
@@ -53,7 +54,7 @@ class TodoItemWidget extends StatelessWidget {
               onPressed: () async => await deleteTodo(todo),
               tooltip: 'Delete Item',
             ),
-            AppConfig.supabaseStorageBucket.isEmpty
+            AppConfig.supabaseStorageBucket.isEmpty || camera == null
                 ? Container()
                 : PhotoWidget(todo: todo),
           ],