49 lines
1.4 KiB
JavaScript
49 lines
1.4 KiB
JavaScript
import { Observable } from 'rx';
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import { ofType } from 'redux-epic';
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import debug from 'debug';
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import {
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types,
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createErrorObservable,
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challengeSelector,
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csrfSelector,
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userSelector
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} from './';
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import { updateUserCurrentChallenge } from '../entities';
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import { postJSON$ } from '../../utils/ajax-stream';
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const log = debug('fcc:app:redux:up-my-challenge-epic');
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export default function updateMyCurrentChallengeEpic(actions, { getState }) {
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const updateChallenge = actions::ofType(types.updateCurrentChallenge)
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.map(() => {
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const state = getState();
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const { username } = userSelector(state);
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const { id } = challengeSelector(state);
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const csrf = csrfSelector(state);
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return {
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username,
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csrf,
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currentChallengeId: id
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};
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})
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.filter(({ username }) => !!username)
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.distinctUntilChanged(x => x.currentChallengeId);
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const optimistic = updateChallenge.map(updateUserCurrentChallenge);
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const ajaxUpdate = updateChallenge
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.debounce(250)
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.flatMapLatest(({ csrf, currentChallengeId }) => {
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return postJSON$(
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'/update-my-current-challenge',
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{
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currentChallengeId,
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_csrf: csrf
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}
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)
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.map(({ message }) => log(message))
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.ignoreElements()
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.catch(createErrorObservable);
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});
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return Observable.merge(optimistic, ajaxUpdate);
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}
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