dortzur/renorm

import { schemaSelectorCreator } from './schema-selector-creator';
import { denormalize } from 'normalizr';
import { dotProp, getEntityNames } from './utils';

const defaultOptions = {
  entitiesPath: 'entities',
  process: (results) => results,
};

/**
 *
 * @param inputSelector {function}
 * @param schema {schema.Entity}
 * @param options {{[entitiesPath]: string, [process]: function}}
 * @return {function}
 */
const renorm = (inputSelector, schema, options = defaultOptions) => {
  const createEntitySelector = schemaSelectorCreator(schema);
  const entityNames = getEntityNames(schema);
  options = Object.assign({}, defaultOptions, options);
  const getEntities = (state) =>
    Object.entries(dotProp(options.entitiesPath, state)).reduce(
      (acc, [key, val]) => {
        if (entityNames.includes(key)) {
          acc[key] = val;
        }
        return acc;
      },
      {}
    );

  return createEntitySelector(inputSelector, getEntities, (input, entities) =>
    options.process(denormalize(input, schema, entities))
  );
};
export default renorm;