feat: Add PlatformWidgetBuilder.

catalyst_voices/packages/catalyst_voices_shared/lib/src/catalyst_voices_shared.dart

@@ -1 +1,2 @@
 export 'platform/catalyst_platform.dart';
+export 'platform_widget_builder/platform_widget_builder.dart';

catalyst_voices/packages/catalyst_voices_shared/lib/src/platform_widget_builder/platform_widget_builder.dart

@@ -0,0 +1,66 @@
+import 'package:catalyst_voices_shared/src/platform/catalyst_platform.dart';
+import 'package:flutter/widgets.dart';
+
+class PlatformWidgetBuilder<T> extends StatelessWidget {
+  final Widget Function(BuildContext context, T? data) builder;
+  final T? android;
+  final T? desktop;
+  final T? fuchsia;
+  final T? iOS;
+  final T? linux;
+  final T? macOS;
+  final T? mobile;
+  final T? mobileWeb;
+  final T? web;
+  final T? webDesktop;
+  final T? windows;
+  final T? other;
+
+  const PlatformWidgetBuilder({
+    super.key,
+    required this.builder,
+    this.android,
+    this.desktop,
+    this.fuchsia,
+    this.iOS,
+    this.linux,
+    this.macOS,
+    this.mobile,
+    this.mobileWeb,
+    this.web,
+    this.webDesktop,
+    this.windows,
+    this.other,
+  });
+
+  @override
+  Widget build(BuildContext context) {
+    if (CatalystPlatform.isAndroid && android != null) {
+      return builder(context, android as T);
+    } else if (CatalystPlatform.isDesktop && desktop != null) {
+      return builder(context, desktop as T);
+    } else if (CatalystPlatform.isFuchsia && fuchsia != null) {
+      return builder(context, fuchsia as T);
+    } else if (CatalystPlatform.isIOS && iOS != null) {
+      return builder(context, iOS as T);
+    } else if (CatalystPlatform.isLinux && linux != null) {
+      return builder(context, linux as T);
+    } else if (CatalystPlatform.isMacOS && macOS != null) {
+      return builder(context, linux as T);
+    } else if (CatalystPlatform.isMobile && mobile != null) {
+      return builder(context, mobile as T);
+    } else if (CatalystPlatform.isMobileWeb && mobileWeb != null) {
+      return builder(context, mobileWeb as T);
+    } else if (CatalystPlatform.isWeb && web != null) {
+      return builder(context, web as T);
+    } else if (CatalystPlatform.isWebDesktop && webDesktop != null) {
+      return builder(context, webDesktop as T);
+    } else if (CatalystPlatform.isWindows && windows != null) {
+      return builder(context, windows as T);
+    } else if (other != null) {
+      return builder(context, other as T);
+    } else {
+      return builder(context, null);
+    }
+  }
+}

catalyst_voices/packages/catalyst_voices_shared/pubspec.yaml

@@ -15,5 +15,7 @@ dependencies:
 dev_dependencies:
    catalyst_analysis:
     path: ../../../catalyst_voices_packages/catalyst_analysis
+   flutter_test:
+      sdk: flutter
    test: ^1.24.9
 

catalyst_voices/packages/catalyst_voices_shared/test/src/catalyst_voices_shared_test.dart

@@ -1 +1 @@
-void main() {}
+export 'platform_widget_builder/platform_widget_builder_test.dart';

catalyst_voices/packages/catalyst_voices_shared/test/src/platform_widget_builder/platform_widget_builder_test.dart

@@ -0,0 +1,26 @@
+import 'package:catalyst_voices_shared/catalyst_voices_shared.dart';
+import 'package:flutter/material.dart';
+import 'package:flutter_test/flutter_test.dart';
+
+void main() {
+
+  Widget buildApp() => MaterialApp(
+    home: Scaffold(
+      body: PlatformWidgetBuilder<String>(
+        other: 'other',
+        builder: (context, platformData) => Text(platformData!),
+      ),
+    ),
+  );
+
+  group('Test platform detection', () {
+    testWidgets('PlatformWidgetBuilder fallbacks to other', (tester) async {
+      await tester.pumpWidget(buildApp());
+      // Verify the Widget renders properly
+      expect(find.byType(Text), findsOneWidget);
+      // Check the output contains the platform that was tested.
+      expect(find.text('other'), findsOneWidget);
+
+    });
+  });
+}