33 lines
1.1 KiB
JavaScript
33 lines
1.1 KiB
JavaScript
import { Map } from 'immutable';
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export function mergeReducers(...reducers) {
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const initialState = reducers
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.reduce((accumState, reducer) => accumState.merge(reducer()), Map());
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return (state = initialState, action) =>
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reducers.reduce((accumState, reducer) => reducer(accumState, action), state);
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}
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export function createListUpdater(idKey, listName = 'list') {
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return (state, instance) => state.update(listName, (list) => {
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const index = list.findIndex(item => item[ idKey ] === instance[ idKey ]);
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return (index >= 0
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? list.mergeIn([ index ], instance)
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: list.push(instance)
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);
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});
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}
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export function createItemInListUpdater(idKey = 'id', shouldAdd = true) {
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return instance =>
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list => {
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const index = list.findIndex(item => item[ idKey ] === instance[ idKey ]);
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return index >= 0
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? list.mergeIn([ index ], instance)
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: (shouldAdd ? list.push(instance) : list);
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}
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}
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export const request = type => `${ type }_REQUEST`;
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export const success = type => `${ type }_SUCCESS`;
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export const failure = type => `${ type }_FAILURE`;
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export const array = type => [ request(type), success(type), failure(type) ];
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