[sqflite_darwin] wip allow concurrent usage using existing plugin

packages_flutter/sqflite_darwin/lib/sqflite_darwin.dart

@@ -1,8 +1,5 @@
+export 'src/sqflite_darwin_plugin.dart'
+    show initSqfliteDarwinPlugin, SqfliteDarwinPlugin;
 
-import 'sqflite_darwin_platform_interface.dart';
-
-class SqfliteDarwin {
-  Future<String?> getPlatformVersion() {
-    return SqfliteDarwinPlatform.instance.getPlatformVersion();
-  }
-}
+// Compat
+export 'src/sqflite_darwin.dart' show SqfliteDarwin;

packages_flutter/sqflite_darwin/lib/src/sqflite_darwin.dart

@@ -0,0 +1,7 @@
+import 'sqflite_darwin_platform_interface.dart';
+
+class SqfliteDarwin {
+  Future<String?> getPlatformVersion() {
+    return SqfliteDarwinPlatform.instance.getPlatformVersion();
+  }
+}

packages_flutter/sqflite_darwin/lib/src/sqflite_darwin_factory.dart

@@ -0,0 +1,15 @@
+import 'package:sqflite_common/sqlite_api.dart';
+
+import 'sqflite_import.dart';
+
+final DatabaseFactory databaseFactorySqfliteDarwinPlugin =
+    createDatabaseFactoryDarwinImpl();
+
+/// Creates an FFI database factory
+DatabaseFactory createDatabaseFactoryDarwinImpl({String? tag = 'darwin'}) {
+  return buildDatabaseFactory(
+      tag: tag,
+      invokeMethod: (String method, [Object? arguments]) {
+        throw UnimplementedError();
+      });
+}

packages_flutter/sqflite_darwin/lib/sqflite_darwin_method_channel.dart → packages_flutter/sqflite_darwin/lib/src/sqflite_darwin_method_channel.dart

@@ -1,17 +1,17 @@
-import 'package:flutter/foundation.dart';
 import 'package:flutter/services.dart';
 
 import 'sqflite_darwin_platform_interface.dart';
 
+const sqfliteDarwinMethodChannel = MethodChannel('sqflite_darwin');
+
 /// An implementation of [SqfliteDarwinPlatform] that uses method channels.
 class MethodChannelSqfliteDarwin extends SqfliteDarwinPlatform {
   /// The method channel used to interact with the native platform.
-  @visibleForTesting
-  final methodChannel = const MethodChannel('sqflite_darwin');
 
   @override
   Future<String?> getPlatformVersion() async {
-    final version = await methodChannel.invokeMethod<String>('getPlatformVersion');
+    final version = await sqfliteDarwinMethodChannel
+        .invokeMethod<String>('getPlatformVersion');
     return version;
   }
 }

packages_flutter/sqflite_darwin/lib/src/sqflite_darwin_plugin.dart

@@ -0,0 +1,21 @@
+import 'package:sqflite_darwin/src/sqflite_darwin_factory.dart';
+
+import 'sqflite_darwin_method_channel.dart';
+
+import 'package:sqflite_common/sqflite.dart';
+
+/// sqflite Plugin registration.
+class SqfliteDarwinPlugin {
+  /// Registers this plugin as the default database factory (if not already set).
+  static void registerWith() {
+    databaseFactoryOrNull ??= databaseFactorySqfliteDarwinPlugin;
+  }
+}
+
+/// Invoke a native method
+Future<T> invokeMethod<T>(String method, [Object? arguments]) async =>
+    await sqfliteDarwinMethodChannel.invokeMethod<T>(method, arguments) as T;
+
+void initSqfliteDarwinPlugin() {
+  databaseFactoryOrNull = databaseFactorySqfliteDarwinPlugin;
+}

packages_flutter/sqflite_darwin/lib/src/sqflite_import.dart

@@ -0,0 +1,12 @@
+// To be imported
+// ignore_for_file: deprecated_member_use
+export 'package:sqflite_common/src/arg_utils.dart' show argumentsToString;
+export 'package:sqflite_common/src/compat.dart' show SqfliteOptions;
+export 'package:sqflite_common/src/constant.dart'
+    show methodOpenDatabase, methodOptions, sqliteErrorCode;
+export 'package:sqflite_common/src/dev_utils.dart' show devPrint, devWarning;
+export 'package:sqflite_common/src/exception.dart'
+    show SqfliteDatabaseException;
+export 'package:sqflite_common/src/mixin/constant.dart' show methodOpenDatabase;
+export 'package:sqflite_common/src/mixin/factory.dart'
+    show buildDatabaseFactory, SqfliteInvokeHandler;

packages_flutter/sqflite_darwin/pubspec.yaml

@@ -11,7 +11,12 @@ dependencies:
   flutter:
     sdk: flutter
   plugin_platform_interface: ^2.0.2
+  sqflite_common: '>=2.5.0-1 <4.0.0'
 
+# tmp
+dependency_overrides:
+  sqflite_common:
+    path: ../../sqflite_common
 dev_dependencies:
   flutter_test:
     sdk: flutter

packages_flutter/sqflite_darwin/test/sqflite_darwin_method_channel_test.dart

@@ -1,6 +1,6 @@
 import 'package:flutter/services.dart';
 import 'package:flutter_test/flutter_test.dart';
-import 'package:sqflite_darwin/sqflite_darwin_method_channel.dart';
+import 'package:sqflite_darwin/src/sqflite_darwin_method_channel.dart';
 
 void main() {
   TestWidgetsFlutterBinding.ensureInitialized();
@@ -9,7 +9,8 @@ void main() {
   const MethodChannel channel = MethodChannel('sqflite_darwin');
 
   setUp(() {
-    TestDefaultBinaryMessengerBinding.instance.defaultBinaryMessenger.setMockMethodCallHandler(
+    TestDefaultBinaryMessengerBinding.instance.defaultBinaryMessenger
+        .setMockMethodCallHandler(
       channel,
       (MethodCall methodCall) async {
         return '42';
@@ -18,7 +19,8 @@ void main() {
   });
 
   tearDown(() {
-    TestDefaultBinaryMessengerBinding.instance.defaultBinaryMessenger.setMockMethodCallHandler(channel, null);
+    TestDefaultBinaryMessengerBinding.instance.defaultBinaryMessenger
+        .setMockMethodCallHandler(channel, null);
   });
 
   test('getPlatformVersion', () async {

packages_flutter/sqflite_darwin/test/sqflite_darwin_test.dart

@@ -1,13 +1,13 @@
 import 'package:flutter_test/flutter_test.dart';
 import 'package:sqflite_darwin/sqflite_darwin.dart';
-import 'package:sqflite_darwin/sqflite_darwin_platform_interface.dart';
-import 'package:sqflite_darwin/sqflite_darwin_method_channel.dart';
+import 'package:sqflite_darwin/src/sqflite_darwin.dart';
+import 'package:sqflite_darwin/src/sqflite_darwin_platform_interface.dart';
+import 'package:sqflite_darwin/src/sqflite_darwin_method_channel.dart';
 import 'package:plugin_platform_interface/plugin_platform_interface.dart';
 
 class MockSqfliteDarwinPlatform
     with MockPlatformInterfaceMixin
     implements SqfliteDarwinPlatform {
-
   @override
   Future<String?> getPlatformVersion() => Future.value('42');
 }

sqflite_test_app/lib/main_sqflite_darwin.dart

@@ -0,0 +1,10 @@
+import 'package:flutter/cupertino.dart';
+import 'package:sqflite_darwin/sqflite_darwin.dart';
+import 'package:sqflite_example/main.dart';
+
+/// Use regular sqflite, overridng to use Darwin iOS and MacOS
+void main() {
+  WidgetsFlutterBinding.ensureInitialized();
+  initSqfliteDarwinPlugin();
+  mainExampleApp();
+}

sqflite_test_app/pubspec.yaml

@@ -28,6 +28,7 @@ dependencies:
   sqflite: '>=2.0.0-nullsafety.2'
   sqflite_common_ffi:
   sqflite_common_ffi_async:
+  sqflite_darwin:
   sqflite_example:
     path: ../sqflite/example
   flutter_web_plugins:
@@ -64,6 +65,8 @@ dependency_overrides:
     path: ../packages_web/sqflite_common_ffi_web
   sqflite_common_ffi_async:
     path: ../packages/sqflite_common_ffi_async
+  sqflite_darwin:
+    path: ../packages_flutter/sqflite_darwin
 # For information on the generic Dart part of this file, see the
 # following page: https://dart.dev/tools/pub/pubspec