public static bool TryAddNewEntity()

in src/Cli/ConfigGenerator.cs [360:453]
75 lines of code
14 McCabe index (conditional complexity)

        public static bool TryAddNewEntity(AddOptions options, RuntimeConfig initialRuntimeConfig, out RuntimeConfig updatedRuntimeConfig)
        {
            updatedRuntimeConfig = initialRuntimeConfig;
            // If entity exists, we cannot add. Display warning
            //
            if (initialRuntimeConfig.Entities.ContainsKey(options.Entity))
            {
                _logger.LogWarning("Entity '{entityName}' is already present. No new changes are added to Config.", options.Entity);
                return false;
            }

            // Try to get the source object as string or DatabaseObjectSource for new Entity
            if (!TryCreateSourceObjectForNewEntity(
                options,
                initialRuntimeConfig.DataSource.DatabaseType == DatabaseType.CosmosDB_NoSQL,
                out EntitySource? source))
            {
                _logger.LogError("Unable to create the source object.");
                return false;
            }

            EntityActionPolicy? policy = GetPolicyForOperation(options.PolicyRequest, options.PolicyDatabase);
            EntityActionFields? field = GetFieldsForOperation(options.FieldsToInclude, options.FieldsToExclude);

            EntityPermission[]? permissionSettings = ParsePermission(options.Permissions, policy, field, source.Type);
            if (permissionSettings is null)
            {
                _logger.LogError("Please add permission in the following format. --permissions \"<<role>>:<<actions>>\"");
                return false;
            }

            bool isStoredProcedure = IsStoredProcedure(options);
            // Validations to ensure that REST methods and GraphQL operations can be configured only
            // for stored procedures
            if (options.GraphQLOperationForStoredProcedure is not null && !isStoredProcedure)
            {
                _logger.LogError("--graphql.operation can be configured only for stored procedures.");
                return false;
            }

            if ((options.RestMethodsForStoredProcedure is not null && options.RestMethodsForStoredProcedure.Any())
                && !isStoredProcedure)
            {
                _logger.LogError("--rest.methods can be configured only for stored procedures.");
                return false;
            }

            GraphQLOperation? graphQLOperationsForStoredProcedures = null;
            SupportedHttpVerb[]? SupportedRestMethods = null;
            if (isStoredProcedure)
            {
                if (CheckConflictingGraphQLConfigurationForStoredProcedures(options))
                {
                    _logger.LogError("Conflicting GraphQL configurations found.");
                    return false;
                }

                if (!TryAddGraphQLOperationForStoredProcedure(options, out graphQLOperationsForStoredProcedures))
                {
                    return false;
                }

                if (CheckConflictingRestConfigurationForStoredProcedures(options))
                {
                    _logger.LogError("Conflicting Rest configurations found.");
                    return false;
                }

                if (!TryAddSupportedRestMethodsForStoredProcedure(options, out SupportedRestMethods))
                {
                    return false;
                }
            }

            EntityRestOptions restOptions = ConstructRestOptions(options.RestRoute, SupportedRestMethods, initialRuntimeConfig.DataSource.DatabaseType == DatabaseType.CosmosDB_NoSQL);
            EntityGraphQLOptions graphqlOptions = ConstructGraphQLTypeDetails(options.GraphQLType, graphQLOperationsForStoredProcedures);

            // Create new entity.
            Entity entity = new(
                Source: source,
                Rest: restOptions,
                GraphQL: graphqlOptions,
                Permissions: permissionSettings,
                Relationships: null,
                Mappings: null);

            // Add entity to existing runtime config.
            IDictionary<string, Entity> entities = new Dictionary<string, Entity>(initialRuntimeConfig.Entities.Entities)
            {
                { options.Entity, entity }
            };
            updatedRuntimeConfig = initialRuntimeConfig with { Entities = new(new ReadOnlyDictionary<string, Entity>(entities)) };
            return true;
        }