object conversion

mapper.js

const importMemberObject = {
  first_name: 'Jason',
  last_name: 'Brady',
  email_address: 'jason@email.com',
  phone_number: '8167395555'
}

// will have to be hand crafted per congregation
const mappingConfig = {
  Member: {
    firstName: 'first_name',
    lastName: 'last_name',
    email: 'email_address'
  },
  Phone: {
    number: 'phone_number'
  }
}

// without spread 
/*
map = (mapperConfig, importMemberObject) => {
  return Object.keys(mapperConfig).reduce((acc, val) => {
    acc[val] = Object.keys(mapperConfig[val]).reduce((child_acc, child_val) => {
      child_acc[child_val] = importMemberObject[mapperConfig[val][child_val]]
      return child_acc
    }, {})
    return acc
  }, {})
}
*/

const forEachMap = (mappingConfig, importMemberObject) => {
  const object = {}
  const objectKeys = Object.keys(mappingConfig)
  objectKeys.forEach(objectKey => {
    object[objectKey] = {}
    const propertyKeys = Object.keys(mappingConfig[objectKey])
    propertyKeys.forEach(propertyKey => {
      object[objectKey][propertyKey] = importMemberObject[mappingConfig[objectKey][propertyKey]]
    })
  })
  return object
}

// with spread
const map = (mapperConfig, importMemberObject) => {
  return Object.keys(mapperConfig).reduce((acc, val) => ({
    ...acc,
    [val]: Object.keys(mapperConfig[val]).reduce((child_acc, child_val) => ({
        ...child_acc,
        [child_val]: importMemberObject[mapperConfig[val][child_val]]
    }), {})
  }), {})
}

const feJson = JSON.stringify(forEachMap(mappingConfig, importMemberObject))
const mapJson = JSON.stringify(map(mappingConfig, importMemberObject))
console.log(feJson)
console.log(mapJson)
console.log(mapJson === feJson)

/*
 drew@drew-dell:~/code$ node reducer.js 
{"Member":{"firstName":"Jason","lastName":"Brady","email":"jason@email.com"},"Phone":{"number":"8167395555"}}
{"Member":{"firstName":"Jason","lastName":"Brady","email":"jason@email.com"},"Phone":{"number":"8167395555"}}
true
*/