@conveyal/woonerf

woonerf

React/Redux bootstrapping and common libs for Conveyal.

Modern JavaScript applications take a lot of bootstrapping. This library helps with some common libs to include and use on the client to help.

Table of Contents

• Pronunciation
• Usage
• API
  • Auth0
  • fetch
  • fetchMultiple
  • html
  • message
• Install
• See Also
• License

Pronunciation

"Woonerf" is a Dutch word for a small neighborhood street where vehicles must move very slowly. The kind of road you can imagine allowing kids to play in. Although it's fun to pronounce it as "woo nerf", the break is after the n (woon == living, erf == yard). A good transliteration for an American English speaker would be "Vone Airf".

Usage

Let's create a Redux application:

const mount = require('@conveyal/woonerf/mount')

const Application = require('./containers/application')
const reducers = require('./reducers')

mount({
  app: Application,
  id: 'root',
  reducers
})

This will create a redux store with the fetch, history, logger, multi, and promise middleware applied, wrap your application with a redux provider, initialize the browser history, and mount your component to #id. The component passed as app will be passed history from react-router-redux and the initialized redux store as props.

API

auth0

Login Component

Create a simple login component with custom Auth0-lock options.

import Auth0 from '@conveyal/woonerf/components/auth0-lock'

export default function Login () {
  const lockOptions = {}
  return (
    <Auth0
      lockOptions={lockOptions}
      />
  )
}

Authentication helpers

refreshUser

Refresh a user. To be used within a redux connected component. Will send update actions to a redux store based on response from Auth0.

import {refreshUser} from '@conveyal/woonerf/auth0'

...

function mapDispatchToProps (dispatch) {
  return {
    refreshUserToken: () => refreshUser(dispatch)
  }
}

...

fetch

fetch({url, options, next, retry, type, id})

Create a fetch action to be dispatched by the store. Key features:

• Automatically JSON.stringify bodies that are objects and automatically JSON.parse responses that are application/json.
• next is a function that's result will be dispatched by the store. It can be an async function.
• retry is a function that receives the response and needs to resolve to a Boolean. It can be an async function.
• Authorization, Content-Type and Accept headers are added automatically (if you want to make a request without one of these headers, for instance suppressing the Authorization header when calling a remote service, simply set it to null in the headers field of options).
• type is a string that can designate a category of fetches that will only run one at a time.
• id can be used to later abort the specific fetch by dispatching an abortFetch action.

fetch errors

The arity of next determines how errors are handled.

1. When no next is present, a fetchError action is dispatched.
2. When a next function with arity < 2 is present, then on error fetchError is dispatched and next is not called.
3. When next has an arity >= 2 then errors are passed to next and fetchError is not dispatched.

const fetch = require('@conveyal/woonerf/fetch')

store.dispatch(fetch({
  url: 'http://conveyal.com',
  options: {
    method: 'post',
    body: {hello: 'world'}
  },
  retry: async (response) => {
    if (response.status !== 200) {
      await timeout(2000)
      return true
    } else {
      return false
    }
  },
  next: async (error, response) => {
    return actionBasedOn(response)
  }
}))

abort fetch

Abort a fetch by dispatching abortFetch({type, id}).

const fetch, {abortFetch, getID} = require('@conveyal/woonerf/fetch')
const id = getID()
store.dispatch(fetch({
  url: 'http://conveyal.com',
  id,
  next: () => {
    throw new Error('Will not be called')
  }
}))
store.dispatch(abortFetch({id}))

fetchMultiple

fetchMultiple({fetches, next})

Allows you to dispatch a single action that will call next with all of the responses.

const {fetchMultiple} = require('@conveyal/woonerf/fetch')

store.dispatch(fetchMultiple({
  fetches: [{
    url: 'http://conveyal.com',
    options: {
      body: {hello: 'world'}
    }
  }],
  next: async (error, responses) => {
    return actionBasedOn(response)
  }
}))

html

html({staticHost, title})

Used for creating the default HTML needed to use a woonerf application. Accepts the following parameters:

• staticHost: (optional) The host server of the static files. This gets prepended to an expected assets folder for the static files. The files loaded will be: ${staticHost}assets/favicon.ico, ${staticHost}assets/index.css and ${staticHost}assets/index.js. If omitted, the host path will be an empty string.
• title: The string to insert into the title tag.

message

message(key, defaultMessage, parameters)

Pass a key, an optional default message, and an optional parameters object that will replace corresponding %(key). It auto-parses process.env.MESSAGES brought in by mastarm and allows you to set your own messages directly with setMessages. Message lookup is done with lodash/get for nested objects.

import message, {setMessages} from '@conveyal/woonerf/message'

setMessages({one:'hello world', two:'hola %(s)', three: {four: 'wat'}})

message('key.doesnt.exist', 'default message') // 'default message'
message('one', 'default message') // 'hello world'
message('three.four', 'default message') // 'wat'
message('fake.key', 'hello %(world)s', {world: 'bob'}) // 'hello bob'
message('two', 'hello %(s)', {s: 'bob'}) // 'hola bob'
message('fake.key', 'hello %(a) %(b)', {a: 'bob', b: 'tim'}) // 'hello bob tim'

Install

With yarn installed, run

$ yarn add @conveyal/woonerf

See Also

• conveyal/mastarm
• facebook/react
• reactjs/redux
• woonerf

License

MIT