80 lines
2.1 KiB
TypeScript
80 lines
2.1 KiB
TypeScript
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import { Action, ActionCreator, createAction } from '@reduxjs/toolkit';
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import { BaseActionCreator } from '@reduxjs/toolkit/dist/createAction.js';
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import * as R from 'remeda';
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import { Dux } from './types.js';
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import { Mutation } from './Updux.js';
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type MutationCase = {
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matcher: (action: Action) => boolean;
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mutation: Mutation;
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terminal: boolean;
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};
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export function buildReducer(
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initialState: any,
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mutations: MutationCase[] = [],
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subduxes: Record<string, Dux> = {},
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) {
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// const subReducers =
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// ? R.mapValues(subduxes, R.prop('reducer'));
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// TODO matcherMutation
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// TODO defaultMutation
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const reducer = (state = initialState, action: Action) => {
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if (!action?.type)
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throw new Error('upreducer called with a bad action');
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let terminal = false;
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let didSomething = false;
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const foo = createAction('foo');
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const localMutation = mutations.find(({ matcher }) => matcher(action));
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if (localMutation) {
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didSomething = true;
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if (localMutation.terminal) terminal = true;
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// TODO wrap mutations in immer
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state = localMutation.mutation(
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(action as any).payload,
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action,
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)(state);
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}
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// TODO defaultMutation
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return state;
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};
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return reducer;
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/*
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if (subReducers) {
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if (subduxes['*']) {
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newState = u.updateIn(
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'*',
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subduxes['*'].upreducer(action),
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newState,
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);
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} else {
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const update = mapValues(subReducers, (upReducer) =>
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upReducer(action),
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);
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newState = u(update, newState);
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}
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}
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const a = mutations[action.type] || mutations['+'];
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if (!a) return newState;
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return a(action.payload, action)(newState);
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};
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return wrapper ? wrapper(upreducer) : upreducer;
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*/
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}
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