feat: OIDC Login on same page

lib/utils/matrix_sdk_extensions/oidc_session_json_extension.dart

@@ -0,0 +1,24 @@
+import 'package:matrix/matrix.dart';
+
+extension OidcSessionJsonExtension on OidcLoginSession {
+  static const String storeKey = 'oidc_session';
+  static const String homeserverStoreKey = 'oidc_stored_homeserver';
+  Map<String, Object?> toJson() => {
+    'oidc_client_data': oidcClientData.toJson(),
+    'authentication_uri': authenticationUri.toString(),
+    'redirect_uri': redirectUri.toString(),
+    'code_verifier': codeVerifier,
+    'state': state,
+  };
+
+  static OidcLoginSession fromJson(Map<String, Object?> json) =>
+      OidcLoginSession(
+        oidcClientData: OidcClientData.fromJson(
+          json['oidc_client_data'] as Map<String, Object?>,
+        ),
+        authenticationUri: Uri.parse(json['authentication_uri'] as String),
+        redirectUri: Uri.parse(json['redirect_uri'] as String),
+        codeVerifier: json['code_verifier'] as String,
+        state: json['state'] as String,
+      );
+}