TF-571 Check OIDC is available

lib/features/login/data/network/endpoint.dart

@@ -0,0 +1,7 @@
+import 'package:core/data/network/config/service_path.dart';
+
+class Endpoint {
+  static const String oidc = '/oidc';
+
+  static final ServicePath webFinger = ServicePath('/.well-known/webfinger');
+}

lib/features/login/data/network/oidc_http_client.dart

@@ -0,0 +1,32 @@
+
+import 'dart:convert';
+
+import 'package:core/core.dart';
+import 'package:model/model.dart';
+import 'package:tmail_ui_user/features/login/data/network/endpoint.dart';
+import 'package:tmail_ui_user/features/login/data/extensions/service_path_extension.dart';
+
+class OIDCHttpClient {
+
+  final DioClient _dioClient;
+
+  OIDCHttpClient(this._dioClient);
+
+  Future<OIDCResponse?> checkOIDCIsAvailable(OIDCRequest oidcRequest) async {
+    final result = await _dioClient.get(
+        Endpoint.webFinger
+            .generateOIDCPath(Uri.parse(oidcRequest.baseUrl))
+            .withQueryParameters([
+              StringQueryParameter('resource', oidcRequest.resourceUrl),
+              StringQueryParameter('rel', oidcRequest.relUrl),
+            ])
+            .generateEndpointPath()
+    );
+    log('OIDCHttpClient::checkOIDCIsAvailable(): RESULT: $result');
+    if (result is Map<String, dynamic>) {
+      return OIDCResponse.fromJson(result);
+    } else {
+      return OIDCResponse.fromJson(jsonDecode(result));
+    }
+  }
+}