Fix Web implementation not being found properly

Fix #82

flutter_web_auth_2/lib/flutter_web_auth_2.dart

@@ -6,9 +6,10 @@ import 'package:flutter/foundation.dart';
 import 'package:flutter_web_auth_2/src/options.dart';
 import 'package:flutter_web_auth_2_platform_interface/flutter_web_auth_2_platform_interface.dart';
 
-export 'src/linux.dart';
 export 'src/options.dart';
-export 'src/windows.dart' if (dart.library.html) 'src/web.dart';
+export 'src/unsupported.dart'
+    if (dart.library.io) 'src/server.dart'
+    if (dart.library.html) 'src/web.dart';
 
 class _OnAppLifecycleResumeObserver extends WidgetsBindingObserver {
   final Function onResumed;

flutter_web_auth_2/lib/src/linux.dart → flutter_web_auth_2/lib/src/server.dart

@@ -7,14 +7,15 @@ import 'package:flutter_web_auth_2_platform_interface/flutter_web_auth_2_platfor
 import 'package:url_launcher/url_launcher.dart';
 import 'package:window_to_front/window_to_front.dart';
 
-/// Implements the plugin interface for Windows.
-class FlutterWebAuth2LinuxPlugin extends FlutterWebAuth2Platform {
+/// Implements the plugin interface using an internal server (currently used by
+/// Windows and Linux).
+class FlutterWebAuth2ServerPlugin extends FlutterWebAuth2Platform {
   HttpServer? _server;
   Timer? _authTimeout;
 
-  /// Registers the Windows implementation.
+  /// Registers the internal server implementation.
   static void registerWith() {
-    FlutterWebAuth2Platform.instance = FlutterWebAuth2LinuxPlugin();
+    FlutterWebAuth2Platform.instance = FlutterWebAuth2ServerPlugin();
   }
 
   @override

flutter_web_auth_2/lib/src/unsupported.dart

@@ -0,0 +1,31 @@
+import 'package:flutter/services.dart';
+import 'package:flutter_web_auth_2_platform_interface/flutter_web_auth_2_platform_interface.dart';
+
+/// Implements the plugin interface for unsupported platforms (just throws
+/// errors).
+class FlutterWebAuth2UnsupportedPlugin extends FlutterWebAuth2Platform {
+  /// Registers the unsupported implementation.
+  static void registerWith() {
+    FlutterWebAuth2Platform.instance = FlutterWebAuth2UnsupportedPlugin();
+  }
+
+  @override
+  Future<String> authenticate({
+    required String url,
+    required String callbackUrlScheme,
+    required Map<String, dynamic> options,
+  }) async {
+    throw PlatformException(
+      message: 'Platform either unsupported or unrecognised.',
+      code: 'UNSUPPORTED',
+    );
+  }
+
+  @override
+  Future clearAllDanglingCalls() async {
+    throw PlatformException(
+      message: 'Platform either unsupported or unrecognised.',
+      code: 'UNSUPPORTED',
+    );
+  }
+}

flutter_web_auth_2/pubspec.yaml

@@ -46,13 +46,13 @@ flutter:
       ios:
         pluginClass: FlutterWebAuth2Plugin
       linux:
-        dartPluginClass: FlutterWebAuth2LinuxPlugin
-        fileName: src/linux.dart
+        dartPluginClass: FlutterWebAuth2ServerPlugin
+        fileName: src/server.dart
       macos:
         pluginClass: FlutterWebAuth2Plugin
       web:
         pluginClass: FlutterWebAuth2WebPlugin
         fileName: src/web.dart
       windows:
-        dartPluginClass: FlutterWebAuth2WindowsPlugin
-        fileName: src/windows.dart
+        dartPluginClass: FlutterWebAuth2ServerPlugin
+        fileName: src/server.dart