getFooOfId.js

const { FooData } = require('./data');

const getFooOfId = (getFooOfIdImpl = async (fooId) => { throw new Error(`Can't retrieved foo of id ${fooId} : missing implementation`) }) => async fooId => {
  try {
    const fooData = await getFooOfIdImpl(fooId);
    return FooData(fooData);
  } catch (err) {
    throw new Error(`Unable to retrieve Foo with id ${fooId}`);
  }
}

/*

This function is used to build a concrete implementation, for example with an in-memory database :

const inMemoryFooDatabase = {
  foo17: {
    id: 'foo17',
    foo: 'a foo value',
    bar: 'a bar value',
    foobaz: 1234,
  },
};

const getFooOfIdFromInMemoryDatabase = getFooOfId(fooId => inMemoryFooDatabase[fooId])
*/

module.exports = {
  getFooOdId,
}