Default Data Transformer

Purpose

For frequently used services (e.g., user data services, question-related services), a default data transformer provides a convenient utility to transform raw service data that modules frequently use. This transformer does not need to handle all data returned by the service—only the most common cases.

Providing a default transformer is optional.

Motivation

The default transformer should be a separate library for the following reasons:

• Separation of concerns: It keeps data fetching (getting raw data from the service) separate from data transformation, aligning with the Gene pattern.
• Distinct data types: Allows clear distinctions between raw and transformed data types.
• Avoids premature transformation: Ensures that services do not return pre-transformed data.
• Flexible transformation: Different use cases may require unique transformations, so the transformer offers a common, convenient approach without enforcing a specific transformation style.

Example

import {useExampleData} from '@acme/example/services/example-data-service';
import {
  transformExampleData,
  ExampleDataType,
} from '@acme/example/services/example-data-service-default-transformer';
...
 
export const useExampleFeature = ({ref}: PropsType) => {
  ...
  const {data} = useExampleData();
  const exampleData = React.useMemo(
    () => transformExampleData(data),
    [data]
  );
  ...
  return {
    ...
  }
}