fix(auth, windows): add pluginregistry to properly restore state on Windows

packages/firebase_auth/firebase_auth/windows/firebase_auth_plugin.cpp

@@ -3,6 +3,7 @@
 // BSD-style license that can be found in the LICENSE file.
 
 #include "firebase_auth_plugin.h"
+#include <firebase_core/firebase_core_plugin_c_api.h>
 
 // This must be included before many other Windows headers.
 #include <windows.h>

packages/firebase_auth/firebase_auth_platform_interface/lib/src/platform_interface/platform_interface_firebase_auth.dart

@@ -53,6 +53,8 @@ abstract class FirebaseAuthPlatform extends PlatformInterface {
     required Map<dynamic, dynamic> pluginConstants,
   }) {
     var currentUser = pluginConstants['APP_CURRENT_USER'];
+    print('pluginConstants: $pluginConstants');
+    print('currentUser: $currentUser');
 
     if (currentUser != null) {
       currentUser as List<Object?>;

packages/firebase_core/firebase_core/windows/CMakeLists.txt

@@ -61,6 +61,9 @@ list(APPEND PLUGIN_SOURCES
   "firebase_core_plugin.h"
   "messages.g.cpp"
   "messages.g.h"
+  "flutter_firebase_plugin.h"
+  "flutter_firebase_plugin_registry.h"
+  "flutter_firebase_plugin_registry.cpp"
 )
 
 # Read version from pubspec.yaml

packages/firebase_core/firebase_core/windows/firebase_core_plugin_c_api.cpp

@@ -10,10 +10,21 @@
 #include <vector>
 
 #include "firebase_core_plugin.h"
+#include "flutter_firebase_plugin_registry.h"
 
 void FirebaseCorePluginCApiRegisterWithRegistrar(
     FlutterDesktopPluginRegistrarRef registrar) {
   firebase_core_windows::FirebaseCorePlugin::RegisterWithRegistrar(
       flutter::PluginRegistrarManager::GetInstance()
-          ->GetRegistrar<flutter::PluginRegistrarWindows>(registrar));
+          ->GetRegistrar<flutter::PluginRegistrarWindows>(registrar)); 
 }
+
+void RegisterPlugin(
+    std::string channelName,
+    void* flutterFirebasePlugin) {
+    FlutterFirebasePlugin* fireplugin = static_cast<FlutterFirebasePlugin*>(flutterFirebasePlugin);
+
+    firebase_core_windows::FlutterFirebasePluginRegistry::registerPlugin(
+		channelName, fireplugin);
+}
+

packages/firebase_core/firebase_core/windows/flutter_firebase_plugin.h

@@ -0,0 +1,20 @@
+#pragma once
+#ifndef FLUTTER_FIREBASE_PLUGIN_H
+#define FLUTTER_FIREBASE_PLUGIN_H
+
+#include <future>
+#include <map>
+#include <string>
+
+#include "firebase/app.h"
+#include "firebase/future.h"
+#include <flutter/standard_method_codec.h>
+
+class FlutterFirebasePlugin {
+ public:
+  virtual ~FlutterFirebasePlugin() {}
+  virtual firebase::Future<flutter::EncodableMap> getPluginConstantsForFirebaseApp(firebase::App firebaseApp) = 0;
+  virtual firebase::Future<void> didReinitializeFirebaseCore() = 0;
+};
+
+#endif

packages/firebase_core/firebase_core/windows/flutter_firebase_plugin_registry.cpp

@@ -0,0 +1,35 @@
+#include "flutter_firebase_plugin_registry.h"
+
+#include <any>
+#include <exception>
+
+#include "firebase/app.h"
+#include "firebase/util.h"
+
+#include "flutter/encodable_value.h"
+
+namespace firebase_core_windows {
+
+    std::unordered_map<std::string, FlutterFirebasePlugin*>
+        FlutterFirebasePluginRegistry::registeredPlugins;
+
+    void FlutterFirebasePluginRegistry::registerPlugin(
+        std::string channelName, FlutterFirebasePlugin* flutterFirebasePlugin) {
+        registeredPlugins[channelName] = flutterFirebasePlugin;
+    }
+
+    flutter::EncodableMap FlutterFirebasePluginRegistry::getPluginConstantsForFirebaseApp(
+        firebase::App firebaseApp) {
+        flutter::EncodableMap pluginConstants;
+
+        for (const auto& entry : registeredPlugins) {
+            std::string channelName = entry.first;
+            FlutterFirebasePlugin* plugin = entry.second;
+
+            firebase::Future future =
+                plugin->getPluginConstantsForFirebaseApp(firebaseApp);
+        }
+
+        return pluginConstants;
+    }
+}

packages/firebase_core/firebase_core/windows/flutter_firebase_plugin_registry.h

@@ -0,0 +1,30 @@
+#ifndef FLUTTER_FIREBASE_PLUGIN_REGISTRY_H
+#define FLUTTER_FIREBASE_PLUGIN_REGISTRY_H
+
+#include <any>
+#include <future>
+#include <string>
+#include <unordered_map>
+
+#include "firebase/app.h"
+#include "firebase/future.h"
+#include "flutter_firebase_plugin.h"
+
+namespace firebase_core_windows {
+
+    class FlutterFirebasePluginRegistry {
+    private:
+        static std::unordered_map<std::string, FlutterFirebasePlugin*>
+            registeredPlugins;
+
+    public:
+        static void registerPlugin(std::string channelName,
+            FlutterFirebasePlugin* flutterFirebasePlugin);
+        static flutter::EncodableMap getPluginConstantsForFirebaseApp(
+            firebase::App firebaseApp);
+        static firebase::Future<void> didReinitializeFirebaseCore();
+    };
+
+}
+
+#endif  // FLUTTER_FIREBASE_PLUGIN_REGISTRY_H

packages/firebase_core/firebase_core/windows/include/firebase_core/firebase_core_plugin_c_api.h

@@ -21,4 +21,8 @@
 FLUTTER_PLUGIN_EXPORT void FirebaseCorePluginCApiRegisterWithRegistrar(
     FlutterDesktopPluginRegistrarRef registrar);
 
+FLUTTER_PLUGIN_EXPORT void RegisterPlugin(
+    std::string channelName,
+    void* flutterFirebasePlugin);
+
 #endif  // FLUTTER_PLUGIN_FIREBASE_CORE_PLUGIN_C_API_H_