37 lines
964 B
JavaScript
37 lines
964 B
JavaScript
import R from 'remeda';
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import u from 'updeep';
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const localMutation = (mutations) => (action) => (state) => {
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const mutation = mutations[action.type];
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if (!mutation) return state;
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return mutation(action.payload, action)(state);
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};
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const subMutations = (subduxes) => (action) => (state) => {
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const subReducers =
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Object.keys(subduxes).length > 0
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? R.mapValues(subduxes, R.prop('upreducer'))
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: null;
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if (!subReducers) return state;
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if (subReducers['*']) {
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return u.updateIn('*', subReducers['*'](action), state);
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}
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const update = R.mapValues(subReducers, (upReducer) => upReducer(action));
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return u(update, state);
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};
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export function buildUpreducer(mutations, subduxes) {
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return (action) => (state) => {
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if( ! mutations[action.type]?.terminal )
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state = subMutations(subduxes)(action)(state);
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return localMutation(mutations)(action)(state);
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};
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}
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