add auth code flow support

gomuks

@@ -1 +1 @@
-Subproject commit d7506029a62299515356f72061d36ae35e9c9590
+Subproject commit 3c759ba03a5235deb82cb1559ebc42c36ee0e874

lib/controllers/auth_url.dart

@@ -0,0 +1,32 @@
+import "package:flutter_riverpod/flutter_riverpod.dart";
+import "package:nexus/controllers/client.dart";
+import "package:nexus/controllers/client_id.dart";
+
+class AuthUrlController extends AsyncNotifier<Uri> {
+  static const prefString = "auth_url";
+
+  final Uri homeserver;
+  AuthUrlController(this.homeserver);
+
+  @override
+  Future<Uri> build() async {
+    final fetched = await ref
+        .watch(ClientController.provider.notifier)
+        .getAuthUrl(
+          .new(
+            homeserverUrl: homeserver,
+            redirectUri: Uri.https("nexus.federated.nexus"),
+            responseMode: .query,
+            scopes: .new([.clientApi]),
+            clientId: await ref.watch(
+              ClientIdController.provider(homeserver).future,
+            ),
+          ),
+        );
+
+    return fetched.url;
+  }
+
+  static final provider = AsyncNotifierProvider.autoDispose
+      .family<AuthUrlController, Uri, Uri>(AuthUrlController.new);
+}

lib/controllers/client.dart

@@ -15,12 +15,14 @@ import "package:nexus/controllers/top_level_spaces.dart";
 import "package:nexus/helpers/extensions/gomuks_buffer.dart";
 import "package:nexus/main.dart";
 import "package:nexus/models/event.dart";
+import "package:nexus/models/oauth_auth_code_response.dart";
 import "package:nexus/models/paginate.dart";
 import "package:nexus/models/requests/get_event.dart";
 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/get_auth_url.dart";
 import "package:nexus/models/requests/oauth/register_client.dart";
 import "package:nexus/models/requests/paginate.dart";
 import "package:nexus/models/requests/redact_event.dart";
@@ -281,6 +283,11 @@ class ClientController extends AsyncNotifier<int> {
         request.toJson(),
       ))["client_id"];
 
+  Future<OAuthAuthCodeResponse> getAuthUrl(OAuthGetAuthUrl request) async =>
+      .fromJson(
+        await _sendCommand("oauth_get_authorization_url", request.toJson()),
+      );
+
   Future<Uri?> discoverHomeserver(Uri homeserver) async {
     try {
       final response = await _sendCommand("discover_homeserver", {

lib/controllers/client_id.dart

@@ -5,6 +5,9 @@ import "package:nexus/controllers/shared_prefs.dart";
 class ClientIdController extends AsyncNotifier<String> {
   static const prefString = "client_id";
 
+  final Uri homeserver;
+  ClientIdController(this.homeserver);
+
   @override
   Future<String> build() async {
     final prefs = await ref.watch(SharedPrefsController.provider.future);
@@ -16,8 +19,17 @@ class ClientIdController extends AsyncNotifier<String> {
         .watch(ClientController.provider.notifier)
         .registerClient(
           .new(
-            homeserverUrl: Uri.https("matrix.federated.nexus"),
+            clientName: "Nexus",
+            applicationType: .native,
+            grantTypes: .new([.authorizationCode, .refreshToken]),
+            responseTypes: .new([.code]),
+            logoUri: Uri.https(
+              "nexus.federated.nexus",
+              "raw/branch/main/assets/mobile.svg",
+            ),
+            homeserverUrl: homeserver,
             clientUri: Uri.https("nexus.federated.nexus"),
+            redirectUris: .new([.https("nexus.federated.nexus")]),
           ),
         );
 
@@ -26,8 +38,6 @@ class ClientIdController extends AsyncNotifier<String> {
     return fetched;
   }
 
-  static final provider =
-      AsyncNotifierProvider.autoDispose<ClientIdController, String>(
-        ClientIdController.new,
-      );
+  static final provider = AsyncNotifierProvider.autoDispose
+      .family<ClientIdController, String, Uri>(ClientIdController.new);
 }

lib/models/oauth_auth_code_response.dart

@@ -0,0 +1,15 @@
+import "package:freezed_annotation/freezed_annotation.dart";
+part "oauth_auth_code_response.freezed.dart";
+part "oauth_auth_code_response.g.dart";
+
+@freezed
+abstract class OAuthAuthCodeResponse with _$OAuthAuthCodeResponse {
+  const factory OAuthAuthCodeResponse({
+    required String state,
+    required String codeVerifier,
+    required Uri url,
+  }) = _OAuthAuthCodeResponse;
+
+  factory OAuthAuthCodeResponse.fromJson(Map<String, Object?> json) =>
+      _$OAuthAuthCodeResponseFromJson(json);
+}

lib/models/requests/oauth/get_auth_url.dart

@@ -0,0 +1,29 @@
+import "package:fast_immutable_collections/fast_immutable_collections.dart";
+import "package:freezed_annotation/freezed_annotation.dart";
+part "get_auth_url.freezed.dart";
+part "get_auth_url.g.dart";
+
+@freezed
+abstract class OAuthGetAuthUrl with _$OAuthGetAuthUrl {
+  const factory OAuthGetAuthUrl({
+    required ResponseMode responseMode,
+    required Uri homeserverUrl,
+    required Uri redirectUri,
+    required IList<Scope> scopes,
+    required String clientId,
+    String? userIdHint,
+  }) = _OAuthGetAuthUrl;
+
+  factory OAuthGetAuthUrl.fromJson(Map<String, Object?> json) =>
+      _$OAuthGetAuthUrlFromJson(json);
+}
+
+enum Scope {
+  openid,
+  email,
+  @JsonValue("urn:matrix:client:api:*")
+  clientApi,
+}
+
+@JsonEnum(fieldRename: .snake)
+enum ResponseMode { query, fragment }

lib/models/requests/oauth/register_client.dart

@@ -7,7 +7,7 @@ part "register_client.g.dart";
 abstract class OAuthRegisterClientRequest with _$OAuthRegisterClientRequest {
   const factory OAuthRegisterClientRequest({
     required Uri homeserverUrl,
-    ApplicationType? applicationType,
+    @Default(ApplicationType.web) ApplicationType applicationType,
     String? clientName,
     required Uri clientUri,
     Uri? logoUri,

lib/pages/login.dart

@@ -1,20 +0,0 @@
-import "package:flutter/material.dart";
-import "package:flutter_hooks/flutter_hooks.dart";
-import "package:hooks_riverpod/hooks_riverpod.dart";
-import "package:nexus/controllers/client.dart";
-import "package:nexus/controllers/client_id_controller.dart";
-import "package:nexus/helpers/extensions/better_when.dart";
-import "package:nexus/widgets/appbar.dart";
-import "package:nexus/helpers/required_validator_helper.dart";
-
-class LoginPage extends HookConsumerWidget {
-  final Uri homeserver;
-  const LoginPage({super.key, required this.homeserver});
-
-  @override
-  Widget build(BuildContext context, WidgetRef ref) => Scaffold(
-    body: ref
-        .watch(ClientIdController.provider)
-        .betterWhen(data: (value) => Text(value)),
-  );
-}

lib/pages/select_server.dart

@@ -2,10 +2,11 @@ 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/helpers/launch_helper.dart";
+import "package:nexus/main.dart";
 import "package:nexus/models/homeserver.dart";
-import "package:nexus/pages/login.dart";
 import "package:nexus/widgets/appbar.dart";
 import "package:nexus/widgets/divider_text.dart";
 
@@ -32,7 +33,7 @@ class SelectServerPage extends HookConsumerWidget {
         final newUrl = newHomeserver == null
             ? null
             : await ref
-                  .watch(ClientController.provider.notifier)
+                  .read(ClientController.provider.notifier)
                   .discoverHomeserver(newHomeserver);
 
         if (context.mounted) {
@@ -47,11 +48,18 @@ class SelectServerPage extends HookConsumerWidget {
               ),
             );
           } else {
-            await Navigator.of(context).push(
-              MaterialPageRoute(builder: (_) => LoginPage(homeserver: newUrl)),
+            final authUrl = await ref.read(
+              AuthUrlController.provider(newUrl).future,
             );
+
+            print(authUrl);
+            // await Navigator.of(context).push(
+            //   MaterialPageRoute(builder: (_) => LoginPage(homeserver: newUrl)),
+            // );
           }
         }
+      } catch (error, stackTrace) {
+        showError(error, stackTrace);
       } finally {
         isLoading.value = false;
       }