sui-domain

sui-domain

Backbone for creating a domain that complains with the guidelines of Schibsted Spain

Motivation

sui-domain provides:

• Avoid repeating boilerplate code by extracting some on this library.
• Enforce all to follow same rules while creating a new domain.
• A HttpFetcher to make http requests
• Set of domain objects to extend
• A utility to create an entry point

Installation

$ npm install @s-ui/domain --save

Using EntryPoint

import { EntryPointFactory } from '@s-ui/domain'

// useCases is an object with a key with the name of the use case
// and the value is the factory of the useCase
const useCases = {
  'current_user': UserFactory.currentUserUseCase
  'products_search': SearchFactory.productsSearchUseCase
  'real_estate_detail': DetailFactory.realEstateDetailUseCase
}

// config could be a simple object or a more complicated
// creation like a class Config with methods to get and set
const config = {
  DETAIL_ENDPOINT: 'http://api.url.com/detail'
}

// that returns you an instantiable EntryPoint class
const EntryPoint = EntryPointFactory({ config, useCases })
const domain = new EntryPoint()

// if you don't want to share the config between instances
// you could pass the config directly to the constructor
// useful if you're mutating the config for storing values
const EntryPoint = EntryPointFactory({ useCases })
const domain = new EntryPoint({ config })

Using Fetcher

import { FetcherFactory } from '@s-ui/domain'
import UserEntitiesFactory from '../../user/Entities/factory'
import UserValueObjectsFactory from '../../user/ValueObjects/factory'

import HTTPUserRepository from './HTTPUserRepository'

export default class UserRepositoriesFactory {
  static hTTPUserRepository = ({config}) =>
    new HTTPUserRepository({
      config,
      fetcher: FetcherFactory.httpFetcher(),
      userEntityFactory: UserEntitiesFactory.userEntity,
      emptyUserValueObjectFactory: UserValueObjectsFactory.emptyUserValueObject
    })
}

Using a domain object

import { UseCase } from '@s-ui/domain'

export default class CurrentUserUseCase extends UseCase {
  constructor ({service} = {}) {
    super()
    this._service = service
  }

  async execute () {
    const userEntity = await this._service.execute()
    return userEntity.toJSON()
  }
}

import { Service } from '@s-ui/domain'

export default class CurrentUserService extends Service {
  constructor ({repository} = {}) {
    super()
    this._repository = repository
  }

  async execute () {
    const userEntity = this._repository.current()
    return userEntity
  }
}

Listen a useCase

@s-ui/domain includes a way to subscribe to every useCase execution without the need of using any kind of decorator or external dependency.

This is useful if you have side effects in a different place from where you're executing the useCase of the domain.

domain
  .get('generate_search_url_search_use_case')
  .subscribe(({params, error, result}) => {
    // doSomething when the useCase generate_search_url_search_use_case is called in other place
  })