TF-3833 Fix failed to keep mobile app connect after network issue

Signed-off-by: dab246 <tdvu@linagora.com>

lib/features/login/domain/exceptions/authentication_exception.dart

@@ -25,8 +25,6 @@ class InvalidBaseUrl extends AuthenticationException {
   InvalidBaseUrl() : super(AuthenticationException.invalidBaseUrl);
 }
 
-class NotFoundAccessTokenException implements Exception {}
-
 class AccessTokenInvalidException implements Exception {}
 
 class DownloadAttachmentHasTokenExpiredException implements Exception {

lib/features/login/domain/exceptions/oauth_authorization_error.dart

@@ -0,0 +1,40 @@
+class OAuthAuthorizationError {
+  static const String serverError = 'server_error'; // HTTP 500 error code
+  static const String temporarilyUnavailable =
+      'temporarily_unavailable'; // HTTP 503 error code
+
+  final String error;
+  final String? errorDescription;
+
+  const OAuthAuthorizationError({
+    required this.error,
+    this.errorDescription,
+  });
+
+  static OAuthAuthorizationError fromErrorCode(
+    String error, {
+    String? errorDescription,
+  }) {
+    switch (error) {
+      case serverError:
+        return ServerError(errorDescription: errorDescription);
+      case temporarilyUnavailable:
+        return TemporarilyUnavailable(errorDescription: errorDescription);
+      default:
+        return OAuthAuthorizationError(
+          error: error,
+          errorDescription: errorDescription,
+        );
+    }
+  }
+}
+
+class ServerError extends OAuthAuthorizationError {
+  const ServerError({super.errorDescription})
+      : super(error: OAuthAuthorizationError.serverError);
+}
+
+class TemporarilyUnavailable extends OAuthAuthorizationError {
+  const TemporarilyUnavailable({super.errorDescription})
+      : super(error: OAuthAuthorizationError.temporarilyUnavailable);
+}