fix(server): http error parsing on endpoints without a default response (#12927)

mobile/openapi/lib/api.dart

@@ -260,6 +260,7 @@ part 'model/tag_update_dto.dart';
 part 'model/tag_upsert_dto.dart';
 part 'model/tags_response.dart';
 part 'model/tags_update.dart';
+part 'model/test_email_response_dto.dart';
 part 'model/time_bucket_response_dto.dart';
 part 'model/time_bucket_size.dart';
 part 'model/tone_mapping.dart';

mobile/openapi/lib/api/notifications_api.dart

@@ -48,10 +48,18 @@ class NotificationsApi {
   /// Parameters:
   ///
   /// * [SystemConfigSmtpDto] systemConfigSmtpDto (required):
-  Future<void> sendTestEmail(SystemConfigSmtpDto systemConfigSmtpDto,) async {
+  Future<TestEmailResponseDto?> sendTestEmail(SystemConfigSmtpDto systemConfigSmtpDto,) async {
     final response = await sendTestEmailWithHttpInfo(systemConfigSmtpDto,);
     if (response.statusCode >= HttpStatus.badRequest) {
       throw ApiException(response.statusCode, await _decodeBodyBytes(response));
     }
+    // When a remote server returns no body with a status of 204, we shall not decode it.
+    // At the time of writing this, `dart:convert` will throw an "Unexpected end of input"
+    // FormatException when trying to decode an empty string.
+    if (response.body.isNotEmpty && response.statusCode != HttpStatus.noContent) {
+      return await apiClient.deserializeAsync(await _decodeBodyBytes(response), 'TestEmailResponseDto',) as TestEmailResponseDto;
+    
+    }
+    return null;
   }
 }

mobile/openapi/lib/api_client.dart

@@ -574,6 +574,8 @@ class ApiClient {
           return TagsResponse.fromJson(value);
         case 'TagsUpdate':
           return TagsUpdate.fromJson(value);
+        case 'TestEmailResponseDto':
+          return TestEmailResponseDto.fromJson(value);
         case 'TimeBucketResponseDto':
           return TimeBucketResponseDto.fromJson(value);
         case 'TimeBucketSize':

mobile/openapi/lib/model/test_email_response_dto.dart

@@ -0,0 +1,99 @@
+//
+// AUTO-GENERATED FILE, DO NOT MODIFY!
+//
+// @dart=2.18
+
+// ignore_for_file: unused_element, unused_import
+// ignore_for_file: always_put_required_named_parameters_first
+// ignore_for_file: constant_identifier_names
+// ignore_for_file: lines_longer_than_80_chars
+
+part of openapi.api;
+
+class TestEmailResponseDto {
+  /// Returns a new [TestEmailResponseDto] instance.
+  TestEmailResponseDto({
+    required this.messageId,
+  });
+
+  String messageId;
+
+  @override
+  bool operator ==(Object other) => identical(this, other) || other is TestEmailResponseDto &&
+    other.messageId == messageId;
+
+  @override
+  int get hashCode =>
+    // ignore: unnecessary_parenthesis
+    (messageId.hashCode);
+
+  @override
+  String toString() => 'TestEmailResponseDto[messageId=$messageId]';
+
+  Map<String, dynamic> toJson() {
+    final json = <String, dynamic>{};
+      json[r'messageId'] = this.messageId;
+    return json;
+  }
+
+  /// Returns a new [TestEmailResponseDto] instance and imports its values from
+  /// [value] if it's a [Map], null otherwise.
+  // ignore: prefer_constructors_over_static_methods
+  static TestEmailResponseDto? fromJson(dynamic value) {
+    upgradeDto(value, "TestEmailResponseDto");
+    if (value is Map) {
+      final json = value.cast<String, dynamic>();
+
+      return TestEmailResponseDto(
+        messageId: mapValueOfType<String>(json, r'messageId')!,
+      );
+    }
+    return null;
+  }
+
+  static List<TestEmailResponseDto> listFromJson(dynamic json, {bool growable = false,}) {
+    final result = <TestEmailResponseDto>[];
+    if (json is List && json.isNotEmpty) {
+      for (final row in json) {
+        final value = TestEmailResponseDto.fromJson(row);
+        if (value != null) {
+          result.add(value);
+        }
+      }
+    }
+    return result.toList(growable: growable);
+  }
+
+  static Map<String, TestEmailResponseDto> mapFromJson(dynamic json) {
+    final map = <String, TestEmailResponseDto>{};
+    if (json is Map && json.isNotEmpty) {
+      json = json.cast<String, dynamic>(); // ignore: parameter_assignments
+      for (final entry in json.entries) {
+        final value = TestEmailResponseDto.fromJson(entry.value);
+        if (value != null) {
+          map[entry.key] = value;
+        }
+      }
+    }
+    return map;
+  }
+
+  // maps a json object with a list of TestEmailResponseDto-objects as value to a dart map
+  static Map<String, List<TestEmailResponseDto>> mapListFromJson(dynamic json, {bool growable = false,}) {
+    final map = <String, List<TestEmailResponseDto>>{};
+    if (json is Map && json.isNotEmpty) {
+      // ignore: parameter_assignments
+      json = json.cast<String, dynamic>();
+      for (final entry in json.entries) {
+        map[entry.key] = TestEmailResponseDto.listFromJson(entry.value, growable: growable,);
+      }
+    }
+    return map;
+  }
+
+  /// The list of required keys that must be present in a JSON.
+  static const requiredKeys = <String>{
+    'messageId',
+  };
+}
+