oauth support is almost done

android/app/src/main/AndroidManifest.xml

@@ -22,6 +22,14 @@
             android:configChanges="orientation|keyboardHidden|keyboard|screenSize|smallestScreenSize|locale|layoutDirection|fontScale|screenLayout|density|uiMode"
             android:hardwareAccelerated="true"
             android:windowSoftInputMode="adjustResize">
+			<meta-data android:name="flutter_deeplinking_enabled" android:value="false" />
+			<intent-filter>
+				<action android:name="android.intent.action.VIEW" />
+				<category android:name="android.intent.category.DEFAULT" />
+				<category android:name="android.intent.category.BROWSABLE" />
+
+				<data android:scheme="nexus.federated.nexus" />
+			</intent-filter>
             <meta-data
               android:name="io.flutter.embedding.android.NormalTheme"
               android:resource="@style/NormalTheme"

lib/controllers/auth_url.dart

@@ -13,7 +13,7 @@ class AuthUrlController extends AsyncNotifier<OAuthAuthCodeResponse> {
       .getAuthUrl(
         .new(
           homeserverUrl: homeserver,
-          redirectUri: .new(scheme: "nexus.federated.nexus"),
+          redirectUri: .new(scheme: "nexus.federated.nexus", path: "/"),
           responseMode: .query,
           scopes: .new([.clientApi]),
           clientId: await ref.watch(

lib/controllers/client.dart

@@ -22,6 +22,7 @@ import "package:nexus/models/requests/get_related_events.dart";
 import "package:nexus/models/requests/get_room_state.dart";
 import "package:nexus/models/requests/join_room.dart";
 import "package:nexus/models/profile.dart";
+import "package:nexus/models/requests/oauth/exchange_token.dart";
 import "package:nexus/models/requests/oauth/get_auth_url.dart";
 import "package:nexus/models/requests/oauth/register_client.dart";
 import "package:nexus/models/requests/paginate.dart";
@@ -288,6 +289,9 @@ class ClientController extends AsyncNotifier<int> {
         await _sendCommand("oauth_get_authorization_url", request.toJson()),
       );
 
+  Future<void> exchangeToken(OAuthExchangeTokenRequest request) async =>
+      await _sendCommand("oauth_exchange_token", request.toJson());
+
   Future<Uri?> discoverHomeserver(Uri homeserver) async {
     try {
       final response = await _sendCommand("discover_homeserver", {

lib/controllers/client_id.dart

@@ -20,7 +20,9 @@ class ClientIdController extends AsyncNotifier<String> {
           ),
           homeserverUrl: homeserver,
           clientUri: Uri.https("nexus.federated.nexus"),
-          redirectUris: .new([.new(scheme: "nexus.federated.nexus")]),
+          redirectUris: .new([
+            .new(scheme: "nexus.federated.nexus", path: "/"),
+          ]),
         ),
       );
 

lib/main.dart

@@ -79,6 +79,7 @@ void main() async {
 
   runApp(
     ProviderScope(
+      retry: null,
       observers: [
         // Change false to true if you want debug information on provider reloads
         // ignore: dead_code

lib/models/requests/oauth/exchange_token.dart

@@ -0,0 +1,17 @@
+import "package:freezed_annotation/freezed_annotation.dart";
+part "exchange_token.freezed.dart";
+part "exchange_token.g.dart";
+
+@freezed
+abstract class OAuthExchangeTokenRequest with _$OAuthExchangeTokenRequest {
+  const factory OAuthExchangeTokenRequest({
+    required Uri homeserverUrl,
+    required String codeVerifier,
+    required Uri redirectUri,
+    required String code,
+    required String clientId,
+  }) = _OAuthExchangeTokenRequest;
+
+  factory OAuthExchangeTokenRequest.fromJson(Map<String, Object?> json) =>
+      _$OAuthExchangeTokenRequestFromJson(json);
+}

lib/pages/chat.dart

@@ -18,6 +18,7 @@ class ChatPage extends ConsumerWidget {
       final showMembersByDefault = constraints.maxWidth > 1000;
       final initComplete = ref.watch(InitCompleteController.provider);
       final roomId = ref.watch(KeyController.provider(KeyController.roomKey));
+
       ref.read(EmojiController.provider);
 
       return Scaffold(

lib/pages/select_server.dart

@@ -1,9 +1,11 @@
+import "package:app_links/app_links.dart";
 import "package:flutter/material.dart";
 import "package:flutter_hooks/flutter_hooks.dart";
 import "package:flutter_svg/flutter_svg.dart";
 import "package:hooks_riverpod/hooks_riverpod.dart";
 import "package:nexus/controllers/auth_url.dart";
 import "package:nexus/controllers/client.dart";
+import "package:nexus/controllers/client_id.dart";
 import "package:nexus/helpers/launch_helper.dart";
 import "package:nexus/main.dart";
 import "package:nexus/models/homeserver.dart";
@@ -48,11 +50,35 @@ class SelectServerPage extends HookConsumerWidget {
               ),
             );
           } else {
-            final authUrl = await ref.read(
+            final codeResponse = await ref.watch(
               AuthUrlController.provider(newUrl).future,
             );
 
-            await ref.watch(LaunchHelper.provider).launchUrl(authUrl.url);
+            await ref.watch(LaunchHelper.provider).launchUrl(codeResponse.url);
+
+            AppLinks().uriLinkStream.listen((encodedUri) async {
+              final code = encodedUri.queryParameters["code"];
+
+              if (code != null) {
+                await ref
+                    .watch(ClientController.provider.notifier)
+                    .exchangeToken(
+                      .new(
+                        homeserverUrl: newUrl,
+                        codeVerifier: codeResponse.codeVerifier,
+                        redirectUri: .new(
+                          scheme: "nexus.federated.nexus",
+                          path: "/",
+                        ),
+                        code: code,
+                        clientId: await ref.watch(
+                          ClientIdController.provider(newUrl).future,
+                        ),
+                      ),
+                    )
+                    .onError(showError);
+              }
+            });
             // await Navigator.of(context).push(
             //   MaterialPageRoute(builder: (_) => LoginPage(homeserver: newUrl)),
             // );

linux/flutter/generated_plugin_registrant.cc

@@ -8,6 +8,7 @@
 
 #include <dynamic_color/dynamic_color_plugin.h>
 #include <file_selector_linux/file_selector_plugin.h>
+#include <gtk/gtk_plugin.h>
 #include <media_kit_libs_linux/media_kit_libs_linux_plugin.h>
 #include <media_kit_video/media_kit_video_plugin.h>
 #include <screen_retriever_linux/screen_retriever_linux_plugin.h>
@@ -21,6 +22,9 @@ void fl_register_plugins(FlPluginRegistry* registry) {
   g_autoptr(FlPluginRegistrar) file_selector_linux_registrar =
       fl_plugin_registry_get_registrar_for_plugin(registry, "FileSelectorPlugin");
   file_selector_plugin_register_with_registrar(file_selector_linux_registrar);
+  g_autoptr(FlPluginRegistrar) gtk_registrar =
+      fl_plugin_registry_get_registrar_for_plugin(registry, "GtkPlugin");
+  gtk_plugin_register_with_registrar(gtk_registrar);
   g_autoptr(FlPluginRegistrar) media_kit_libs_linux_registrar =
       fl_plugin_registry_get_registrar_for_plugin(registry, "MediaKitLibsLinuxPlugin");
   media_kit_libs_linux_plugin_register_with_registrar(media_kit_libs_linux_registrar);

linux/flutter/generated_plugins.cmake

@@ -5,6 +5,7 @@
 list(APPEND FLUTTER_PLUGIN_LIST
   dynamic_color
   file_selector_linux
+  gtk
   media_kit_libs_linux
   media_kit_video
   screen_retriever_linux

linux/nexus.federated.Nexus.desktop

@@ -2,8 +2,9 @@
 Name=Nexus
 GenericName=Matrix Client
 Comment=A simple and user-friendly Matrix client
-Exec=nexus
+Exec=nexus %u
 Icon=nexus
 Terminal=false
 Type=Application
 Categories=Chat;Network;InstantMessaging;
+MimeType=x-scheme-handler/nexus.federated.nexus;

linux/runner/my_application.cc

@@ -23,6 +23,13 @@ static void first_frame_cb(MyApplication* self, FlView *view)
 // Implements GApplication::activate.
 static void my_application_activate(GApplication* application) {
   MyApplication* self = MY_APPLICATION(application);
+
+  GList* windows = gtk_application_get_windows(GTK_APPLICATION(application));
+  if (windows) {
+    gtk_window_present(GTK_WINDOW(windows->data));
+    return;
+  }
+
   GtkWindow* window =
       GTK_WINDOW(gtk_application_window_new(GTK_APPLICATION(application)));
 
@@ -93,7 +100,7 @@ static gboolean my_application_local_command_line(GApplication* application, gch
   g_application_activate(application);
   *exit_status = 0;
 
-  return TRUE;
+  return FALSE;
 }
 
 // Implements GApplication::startup.
@@ -140,6 +147,6 @@ MyApplication* my_application_new() {
 
   return MY_APPLICATION(g_object_new(my_application_get_type(),
                                      "application-id", APPLICATION_ID,
-                                     "flags", G_APPLICATION_NON_UNIQUE,
+                                     "flags", G_APPLICATION_HANDLES_COMMAND_LINE | G_APPLICATION_HANDLES_OPEN,
                                      nullptr));
 }

macos/Flutter/GeneratedPluginRegistrant.swift

@@ -5,6 +5,7 @@
 import FlutterMacOS
 import Foundation
 
+import app_links
 import dynamic_color
 import file_picker
 import file_selector_macos
@@ -18,6 +19,7 @@ import wakelock_plus
 import window_manager
 
 func RegisterGeneratedPlugins(registry: FlutterPluginRegistry) {
+  AppLinksMacosPlugin.register(with: registry.registrar(forPlugin: "AppLinksMacosPlugin"))
   DynamicColorPlugin.register(with: registry.registrar(forPlugin: "DynamicColorPlugin"))
   FilePickerPlugin.register(with: registry.registrar(forPlugin: "FilePickerPlugin"))
   FileSelectorPlugin.register(with: registry.registrar(forPlugin: "FileSelectorPlugin"))

macos/Runner/Info.plist

@@ -28,5 +28,18 @@
 	<string>MainMenu</string>
 	<key>NSPrincipalClass</key>
 	<string>NSApplication</string>
+	<key>CFBundleURLTypes</key>
+	<array>
+		<dict>
+			<key>CFBundleURLName</key>
+			<!-- abstract name for this URL type (you can leave it blank) -->
+			<string>auth_callback</string>
+			<key>CFBundleURLSchemes</key>
+			<array>
+				<!-- your schemes -->
+				<string>nexus.federated.nexus</string>
+			</array>
+		</dict>
+	</array>
 </dict>
 </plist>

pubspec.lock

@@ -41,6 +41,38 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "0.13.11"
+  app_links:
+    dependency: "direct main"
+    description:
+      name: app_links
+      sha256: "3462d9defc61565fde4944858b59bec5be2b9d5b05f20aed190adb3ad08a7abc"
+      url: "https://pub.dev"
+    source: hosted
+    version: "7.0.0"
+  app_links_linux:
+    dependency: transitive
+    description:
+      name: app_links_linux
+      sha256: f5f7173a78609f3dfd4c2ff2c95bd559ab43c80a87dc6a095921d96c05688c81
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.0.3"
+  app_links_platform_interface:
+    dependency: transitive
+    description:
+      name: app_links_platform_interface
+      sha256: "05f5379577c513b534a29ddea68176a4d4802c46180ee8e2e966257158772a3f"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.0.2"
+  app_links_web:
+    dependency: transitive
+    description:
+      name: app_links_web
+      sha256: af060ed76183f9e2b87510a9480e56a5352b6c249778d07bd2c95fc35632a555
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.0.4"
   archive:
     dependency: transitive
     description:
@@ -558,6 +590,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "2.3.2"
+  gtk:
+    dependency: transitive
+    description:
+      name: gtk
+      sha256: "4ff85b2a16724029dd9e5bbb5a94b6918f9973f74ba571c949d2002801879cf5"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.2.0"
   hooks:
     dependency: "direct main"
     description:

pubspec.yaml

@@ -76,6 +76,7 @@ dependencies:
   m3e_card_list: ^0.1.0
   xdg_directories: ^1.1.0
   package_info_plus: ^9.0.1
+  app_links: ^7.0.0
   
 dev_dependencies:
   build_runner: 2.15.0

windows/flutter/generated_plugin_registrant.cc

@@ -6,6 +6,7 @@
 
 #include "generated_plugin_registrant.h"
 
+#include <app_links/app_links_plugin_c_api.h>
 #include <dynamic_color/dynamic_color_plugin_c_api.h>
 #include <file_selector_windows/file_selector_windows.h>
 #include <media_kit_libs_windows_video/media_kit_libs_windows_video_plugin_c_api.h>
@@ -15,6 +16,8 @@
 #include <window_manager/window_manager_plugin.h>
 
 void RegisterPlugins(flutter::PluginRegistry* registry) {
+  AppLinksPluginCApiRegisterWithRegistrar(
+      registry->GetRegistrarForPlugin("AppLinksPluginCApi"));
   DynamicColorPluginCApiRegisterWithRegistrar(
       registry->GetRegistrarForPlugin("DynamicColorPluginCApi"));
   FileSelectorWindowsRegisterWithRegistrar(

windows/flutter/generated_plugins.cmake

@@ -3,6 +3,7 @@
 #
 
 list(APPEND FLUTTER_PLUGIN_LIST
+  app_links
   dynamic_color
   file_selector_windows
   media_kit_libs_windows_video

windows/runner/main.cpp

@@ -1,12 +1,17 @@
 #include <flutter/dart_project.h>
 #include <flutter/flutter_view_controller.h>
 #include <windows.h>
-
+#include "app_links/app_links_plugin_c_api.h"
 #include "flutter_window.h"
 #include "utils.h"
 
 int APIENTRY wWinMain(_In_ HINSTANCE instance, _In_opt_ HINSTANCE prev,
                       _In_ wchar_t *command_line, _In_ int show_command) {
+  // Forward the link to an existing instance, if any, then exit.
+  // You may ignore the result if you need to create another window.
+  if (SendAppLinkToInstance()) {
+    return EXIT_SUCCESS;
+  }
   // Attach to console when present (e.g., 'flutter run') or create a
   // new console when running with a debugger.
   if (!::AttachConsole(ATTACH_PARENT_PROCESS) && ::IsDebuggerPresent()) {