public async Task SaveSettings()

in src/AWS.Deploy.Orchestration/DeploymentSettingsHandler.cs [112:169]
51 lines of code
9 McCabe index (conditional complexity)

        public async Task SaveSettings(SaveSettingsConfiguration saveSettingsConfig, Recommendation recommendation, CloudApplication cloudApplication, OrchestratorSession orchestratorSession)
        {
            if (saveSettingsConfig.SettingsType == SaveSettingsType.None)
            {
                // We are not throwing an expected exception here as this issue is not caused by the user.
                throw new InvalidOperationException($"Cannot persist settings with {SaveSettingsType.None}");
            }

            if (!_fileManager.IsFileValidPath(saveSettingsConfig.FilePath))
            {
                var message = $"Failed to save deployment settings because {saveSettingsConfig.FilePath} is invalid or its parent directory does not exist on disk.";
                throw new FailedToSaveDeploymentSettingsException(DeployToolErrorCode.FailedToSaveDeploymentSettings, message);
            }

            var projectDirectory = Path.GetDirectoryName(orchestratorSession.ProjectDefinition.ProjectPath);
            if (string.IsNullOrEmpty(projectDirectory))
            {
                var message = "Failed to save deployment settings because the current deployment session does not have a valid project path";
                throw new FailedToSaveDeploymentSettingsException(DeployToolErrorCode.FailedToSaveDeploymentSettings, message);
            }

            var deploymentSettings = new DeploymentSettings
            {
                AWSProfile = orchestratorSession.AWSProfileName,
                AWSRegion = orchestratorSession.AWSRegion,
                ApplicationName = recommendation.Recipe.DeploymentType == DeploymentTypes.ElasticContainerRegistryImage ? null : cloudApplication.Name,
                RecipeId = cloudApplication.RecipeId,
                Settings = _optionSettingHandler.GetOptionSettingsMap(recommendation, orchestratorSession.ProjectDefinition, _directoryManager)
            };

            if (saveSettingsConfig.SettingsType == SaveSettingsType.Modified)
            {
                foreach (var optionSetting in recommendation.GetConfigurableOptionSettingItems())
                {
                    if (!_optionSettingHandler.IsOptionSettingModified(recommendation, optionSetting))
                    {
                        deploymentSettings.Settings.Remove(optionSetting.FullyQualifiedId);
                    }
                }
            }

            try
            {
                var content = JsonConvert.SerializeObject(deploymentSettings, new JsonSerializerSettings
                {
                    Formatting = Formatting.Indented,
                    NullValueHandling = NullValueHandling.Ignore,
                    ContractResolver = new SerializeModelContractResolver()
                });

                await _fileManager.WriteAllTextAsync(saveSettingsConfig.FilePath, content);
            }
            catch (Exception ex)
            {
                var message = $"Failed to save the deployment settings at {saveSettingsConfig.FilePath} due to the following error: {Environment.NewLine}{ex.Message}";
                throw new FailedToSaveDeploymentSettingsException(DeployToolErrorCode.FailedToSaveDeploymentSettings, message, ex);
            }
        }