Redux Fetcher Compose

Redux Fetcher Compose is a library for data fetching and integrate @reduxjs/toolkit for React application

It features:

• Support Hooks, React Component, and Redux action to fetch and get data from API.
• Auto init reducer and action. It means, you not must declare a reducer to store response data.
• Support autosave response data to reducer base on URI (caching and prevent DRY code).
• Support transform response data getter.
• Support Abort Controller to abort request after unmount or client timeout.
• TypeScript ready.
• Support helper checks the status of data and requests.
• Add more hooks to trigger the request event.
• Can set timeout and parse the response for each request.
• Refetch request with previous props.
• All features supported by @reduxjs/toolkit

...and a lot more.

Usage

Inside your React project directory, run the following:

yarn add redux-fetcher-compose

Or with npm:

npm install redux-fetcher-compose

Quick Start

You can checkout example at CodeSandbox

fetcher.ts

import {
  createFetcher,
  createService,
  ResponseParsed,
} from 'redux-fetcher-compose'

interface ExampleFetcherProps {
  type: string
}

interface Post {
  id: string
  name: string
  description: string
}

type RootState = any // Root reducers type;

const serviceCommon = createService({
  domain: 'https://example.com/api',
  requestTimeout: 10000
})

const ENTRY_POINT = 'example'

const fetcher = createFetcher<
  ExampleFetcherProps,
  RootState,
  ResponseParsed<Post[]>,
>({
  id: 'Example',
  shouldKeepData: true,
  uri: ({ props }) => props.type,
  service: serviceCommon,
  requestInfo: () => {
    return {
      entry: ENTRY_POINT,
      options: {
        method: 'GET',
      },
    }
  },
})

export const {
  action: getExampleAction,
  component: ExampleFetcher,
  useFetcherCompose: useExampleFetcherCompose,
  useGetter: useExampleGetter,
  useFetcher: useExampleFetcher
} = fetcher

App.tsx

import React from 'react'
import {
  createAppState,
  DataProvider
} from 'redux-fetcher-compose'
import { useExampleFetcherCompose } from './fetcher.ts'

const appState = createAppState({
  enableReduxDevTools: true,
  reducers: {}, // Root reducers
  initialState: {},
})

export default function App () {
  const [getter, refetch, abortController] = useExampleFetcherCompose({
    type: 'news'
  })

  const handleRefetch = () => {
    refetch()
  }

  return (
    <DataProvider appState={appState}>
      <h1>Hello Redux Fetcher Compose</h1>
      <button onClick={handleRefetch}>Refetch</button>
      <p>Fetcher data: {JSON.stringify(getter)}</p>
    </DataProvider>
  )
}

API

createAppState

The function to create Redux store and app state context.

const appState = createAppState(options)

Parameters

• options: an object of config React Redux.
  • enableReduxDevTools: boolean = false: (optional) whether to enable Redux DevTools integration.
  • reducers: ReducersMapObject = {}: (optional) a single reducer function that will be used as the root reducer.
  • initialState: Object = {}: (optional) an initial state value to be passed to the Redux createStore function.
  • middleware = []: (optional) an array of Redux middleware to install.

Return values

• store: the store of Redux, it's enhanced some feature to use for fetcher.
• appStateContext: the value of React context.
  • enhancedStore: the Redux store.
  • dispatch: the function to dispatch Redux action.

DataProvider

The React component to wrap all components of the application to used Redux.

<DataProvider appState={appState}>
  <App />
</DataProvider>

Props

• appState: the app state created by createAppState function.
• children: the React component children.

AppStateContext

The React context

import { useContext } from 'react'

const appStateContext = useContext(AppStateContext)

Return values

• enhancedStore: the Redux store.
• dispatch: the function to dispatch Redux action.

useStore

This React hook returns a reference to the same Redux store that was passed into the <DataProvider> component.

  const enhancedStore = useStore()

createService

The function to create a request service. It's can config API domain, request timeout, parse response of request, pass request options. Moreover, it provides some hooks to trigger events: pre-request, request success, request error. The return value of the function used in the fetcher config as a parameter.

const service  = createService(options);

Parameters

• options: the object to config service.
  • domain: string = undefined: (optional) the base domain to request API.
  • requestTimeout: number = undefined: (optional) set time (millisecond) to set timeout for request.
  • responseParser: ResponseParser = defaultResponseParser: the function to parse response. It's decide response of request is success or error.
  • optionsModifier: OptionModifier = undefined: the function to modify request options default.
  • preRequestHook: FnPreRequestHook = undefined: the function to trigger pre request called.
  • requestSuccessHook: FnRequestSuccessHook = undefined: the function to trigger response succeed.
  • requestErrorHook: FnRequestErrorHook = undefined: the function to trigger response error.

Return values

• service: Service: the function to use in fetcher config.

Types

• ResponseParser: (response) => Promise
• OptionModifier: (options) => RequestOptions
  • options: { getAppStateContext, requestInfo }
• FnPreRequestHook: (options) => void
  • options: { getAppStateContext, requestInfo, options }
• FnRequestSuccessHook: (options) => void
  • options: { getAppStateContext, requestInfo, options, responseParsed }
• FnRequestErrorHook: (options) => void
  • options: { getAppStateContext, requestInfo, options, responseParsed }

createFetcher

The function is used to define a fetcher. It's will create fetcher action, fetcher component, some hooks such as useFetcher, useGetter, useFetcherCompose.

/**
 * @generator {FP}: Fetcher prop
 * @generator {RS}: Root state,
 * @generator {R}: Response,
 * @generator {TR}: Transform response
 * @param config
 */
const fetcher = createFetcher<FP, RS = any, R = any, TR = R>(config);

Parameters

• config: the configuration object of fetcher.
  • id: string = undefined: (optional) the id of the fetcher. It's used to create a reducer to store response parsed. The field is optional, but if you want to use getter, that must be required.
  • shouldKeepData: boolean = false: (optional) the option help you keep fetcher data when component has use fetcher. It just work when you use useFetcher, useFetcherCompose, fetcher component.
  • uri: FnFetcherURI = undefined: (optional) the path to store response data in fetcher reducer. It useful when you call fetcher at many different contexts. Default fetcher will auto created path is @.
  • service: Service: it service that fetcher used. Created by createService.
  • requestInfo: FnFetcherRequestInfo: the function help declare are config of a request such as: domain, query, timeout, entry point, request options.
  • shouldFetch: FnFetcherShouldFetch = defaultShouldFetch: (optional) the function decided request call or not call. Default return true if the first call or current props different with previous props.
  • preHandler: FnFetcherPreHandler = undefined: (optional) the function will trigger before request called.
  • onPending: FnFetcherOnPendingHandler = defaultOnPending: (optional) the function will trigger while requesting API.
  • onSuccess: FnFetcherOnSuccessHandler = defaultOnSuccess: (optional) the function will trigger when response parsed was succeed.
  • onError: FnFetcherOnErrorHandler = defaultOnError: (optional) the function will trigger when response parsed was error.

Return values

• action: Redux action. When action dispatched then requesting API.
• component: the React component. When component mounted then requesting API. But call or not call rely on the value returned of the shouldFetch function.
• useFetcher: the React hook to help you requesting API. But call or not call rely on the value returned of the shouldFetch function.
• useGetter: the React hook to help you get info of a request called stored in reducer base on uri.
• useFetcherCompose: the React hook that compose useFetcher and useGetter.

Types

• FnFetcherURI: ({ props, getState }) => string;
  • props: Props to pass when use fetcher instance.
  • getState: Get state of root reducer.
• Service: ({ getAppStateContext, requestInfo, abortController, onPending, onSuccess, onError }) => Promise
• FnFetcherRequestInfo: (props, getAppStateContext) => RequestInfo
• RequestInfo: is a object.
  • domain?: string
  • query?: string | {}
  • timeout?: number
  • entry: string
  • options: RequestInit
• FnFetcherShouldFetch: ({ props, state, localState} ) => boolean;
  • state: is a root state.
  • localState: is a state of fetcher base on uri.
• FnFetcherPreHandler: ({ props, getState, getAppStateContext, dispatch, localState }) => void
• FnFetcherOnPendingHandler: ({ props, requestInfo, getState, localState, getAppStateContext, dispatch }) => any
• FnFetcherOnSuccessHandler: ({ props, requestInfo, getState, localState, getAppStateContext, dispatch }) => TR | R
• FnFetcherOnErrorHandler: ({ props, requestInfo, error, localState, getState, getAppStateContext, dispatch }) => TR | R

Fetcher values returned

Action

action: (props?: FP, abortController?: AbortController ) => any

• props: is a prop to pass in fetcher.
• abortController: is a instance of new AbortController()
• When you dispatch action will return value, that returned onSuccess or onError function that pass to config fetcher.

useFetcher

 const [refetch, abortController] = useFetcher(props?: FP, defer?: boolean);

• Hook params:
  • props: is a props will pass to fetcher.
  • defer: If set true then will not request API when hook mounted.
• Hook return value:
  • refetch is a function to refetch API: (newProps? FP) => TR
  • abortController is a instance of AbortController.

useGetter

const getter = useGetter(props?: FP, transform?: (getter) => { ... })

• Hook params:
  • props: is a props will pass to fetcher.
  • transform: is a function to transform data before return.
• Hook return one object include properties:

  • fetchStatus: is a fetch status.

  • dataStatus: is a fetcher data status.

  • value: is a value returned by onPending, onSuccess or onError

  • previous: is a previous getter after one action dispatched to change getter data.

  • currentProps: is current props to passed in fetcher.

  • previousProps: is previous props to passed in fetcher.

  • isStatus: is a function to check status of request

    isStatus: (dataStatus: DataStatus) => boolean;

  • isLoading: it is true: API requesting.

useFetcherCompose

 const [getter, refetch, abortController] = useFetcherCompose(props?: FP, transform?: (getter) => { ... });

• Hook params:
  • props: is a props will pass to fetcher.
  • defer: If set true then will not request API when hook mounted.
• Hook return value:
  • getter is a value returned by transform function. It a object same value returned by useGetter hook.
  • refetch is a function to refetch API: (newProps? FP) => TR
  • abortController is a instance of AbortController.

Component

 <Component {...props} transform={(getter) => { ... }}>
   <SomethingComponent />
 </Component>

• Component will pass all props into fetcher.

• Component has specific prop is transform.

  transform: (getter) => {...}

• SomethingComponent will passed two props: getter and refetch.

  • getter is a value returned by transform function. It a object same value returned by useGetter hook.
  • refetch is a function to refetch API: (newProps? FP) => TR

defaultShouldFetch

The function to check should fetch or shouldn't fetch API. By check, fetch data status is initial or previous props different current props.

Some enums

DataStatus

The status of fetcher data.

• Initial: is the initial state.
• Initializing: pending on the first request.
• Initialized: done on the first request.
• Updating: pending since the first request.
• Updated: done since the first request.
• Loading: is requesting.
• Error: the response was an error.
• Success: the response was succeeded.
• Aborted: the response was aborted.
• Timeout: the response timeout.

FetchStatus

The status of the request.

• Init
• Pending
• Done
• Aborted
• Timeout

Some helpers

parseQuery

The function using the qs library. Help you parse query string to object with default ignoreQueryPrefix = true.

const queryObject = parseQuery(query: string, options: IParseOptions)

stringifyQuery

The function using the qs library. Help you parse query string to object with default addQueryPrefix = true.

const queryString = stringifyQuery(query: Object, options: IStringifyOptions)

Some interfaces

• Service
• FnFetcherShouldFetch
• FnFetcherPreHandler
• FnFetcherRequestInfo
• FnFetcherURI
• FnFetcherOnPendingHandler
• FnFetcherOnSuccessHandler
• FnFetcherOnErrorHandler
• ResponseParsed

And export all modules of @reduxjs/toolkit library

Versioning

Use SemVer for versioning. For the versions available, see the tags on this repository.

Author

Lê Quí Nhất - [e-mail]