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An async example of using union-type
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import Type from "union-type"; | |
import { createStore, combineReducers } from "redux"; | |
import memoize from "ramda/src/memoize"; | |
import path from "ramda/src/path"; | |
import axios from "axios"; | |
import Future from "fluture"; | |
// MESSAGES | |
const Msg = Type({ | |
FETCH_GIF: [], | |
GIF_RESPONSE: [Object], | |
GIF_ERROR: [Object] | |
}); | |
// ASYNC ACTIONS | |
const fetchGif = () => | |
Future((rej, res) => { | |
axios | |
.get( | |
SOME_API_URL | |
) | |
.then(res) | |
.catch(rej); | |
}); | |
const onGifSuccess = response => { | |
gifResponse(response); | |
}; | |
const onGifError = err => { | |
gifErr(err); | |
}; | |
// MESSAGE HANDLERS | |
const nextState = Msg.caseOn({ | |
FETCH_GIF: state => { | |
fetchGif().fork(onGifError, onGifSuccess); | |
return state; | |
}, | |
GIF_RESPONSE: (response, state) => ({ ...state, gif: response }), | |
GIF_ERROR: (err, state) => ({ ...state, gifErr: err }), | |
_: state => state | |
}); | |
// STATE | |
const initialState = { | |
gif: {}, | |
gifError: {} | |
}; | |
// UPDATE | |
function app(state = initialState, { type = Msg.DEFAULT, payload = null }) { | |
if (typeof type === "string") return state; | |
return nextState(type, state); | |
} | |
// STORE | |
const store = createStore( | |
combineReducers({ app }), | |
window.__REDUX_DEVTOOLS_EXTENSION__ && window.__REDUX_DEVTOOLS_EXTENSION__() | |
); | |
// ACTIONS | |
export const getGif = () => { | |
store.dispatch({ type: Msg.FETCH_GIF }); | |
}; | |
export const gifResponse = response => { | |
store.dispatch({ type: Msg.GIF_RESPONSE(response) }); | |
}; | |
export const gifError = err => { | |
store.dispatch({ type: Msg.GIF_ERROR(err) }); | |
}; | |
// SELECTORS | |
export const gifUrl = memoize( | |
path(["app", "gif", "data", "data", "image_original_url"]) | |
); | |
export const gifErr = memoize(path(["app", "gifErr"])); | |
// EXPORT DEFAULT | |
export default store; |
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Seems like onGifSuccess and err should be inlined?