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Fixed another type of fluent reducerFactory
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@ -1,4 +1,4 @@
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import { ActionOf, ActionCreator } from './actionCreatorFactory';
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import { ActionOf, ActionCreator, actionCreatorFactory } from './actionCreatorFactory';
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import { Reducer } from 'redux';
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export type Mapper<State, Payload> = (state: State, action: ActionOf<Payload>) => State;
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@ -43,3 +43,95 @@ export const reducerFactory = <State>(initialState: State): AddMapper<State> =>
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return instance;
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};
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/** Another type of fluent reducerFactory */
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export interface FilterWith<State> {
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filterWith: <Payload>(actionCreator: ActionCreator<Payload>) => MapTo<State, Payload>;
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}
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export interface OrFilterWith<State> {
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orFilterWith: <Payload>(actionCreator: ActionCreator<Payload>) => MapTo<State, Payload>;
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}
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export interface MapTo<State, Payload> {
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mapTo: (mapper: Mapper<State, Payload>) => CreateReducerEx<State>;
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}
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export interface CreateReducerEx<State> extends OrFilterWith<State> {
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create: () => Reducer<State, ActionOf<any>>;
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}
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export const reducerFactoryEx = <State>(initialState: State): FilterWith<State> => {
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const allMapperConfigs: Array<MapperConfig<State, any>> = [];
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const innerMapTo = (actionCreator: ActionCreator<any>, mapper: Mapper<State, any>): CreateReducerEx<State> => {
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allMapperConfigs.filter(config => config.filter.type === actionCreator.type)[0].mapper = mapper;
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return instance;
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};
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const filterWith = <Payload>(actionCreator: ActionCreator<Payload>): MapTo<State, Payload> => {
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if (allMapperConfigs.some(c => c.filter.type === actionCreator.type)) {
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throw new Error(`There is already a mapper defined with the type ${actionCreator.type}`);
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}
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allMapperConfigs.push({ filter: actionCreator, mapper: null });
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const mapTo = <Payload>(mapper: Mapper<State, Payload>): CreateReducerEx<State> => {
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innerMapTo(actionCreator, mapper);
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return instance;
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};
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return { mapTo };
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};
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const orFilterWith = <Payload>(actionCreator: ActionCreator<Payload>): MapTo<State, Payload> => {
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if (allMapperConfigs.some(c => c.filter.type === actionCreator.type)) {
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throw new Error(`There is already a mapper defined with the type ${actionCreator.type}`);
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}
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allMapperConfigs.push({ filter: actionCreator, mapper: null });
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const mapTo = <Payload>(mapper: Mapper<State, Payload>): CreateReducerEx<State> => {
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innerMapTo(actionCreator, mapper);
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return instance;
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};
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return { mapTo };
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};
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const create = (): Reducer<State, ActionOf<any>> => (state: State = initialState, action: ActionOf<any>): State => {
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const mapperConfig = allMapperConfigs.filter(config => config.filter.type === action.type)[0];
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if (mapperConfig) {
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return mapperConfig.mapper(state, action);
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}
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return state;
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};
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const instance = { filterWith, orFilterWith, create };
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return instance;
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};
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interface TestState {
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data: string[];
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}
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const initialState: TestState = {
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data: [],
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};
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const dummyActionCreator = actionCreatorFactory<string>('dummyActionCreator').create();
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const dummyActionCreator2 = actionCreatorFactory<number>('dummyActionCreator2').create();
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export const reducerFactoryExReducer = reducerFactoryEx<TestState>(initialState)
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.filterWith(dummyActionCreator)
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.mapTo((state, action) => ({ ...state, data: state.data.concat(action.payload) }))
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.orFilterWith(dummyActionCreator2)
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.mapTo((state, action) => ({ ...state, data: state.data.concat(`${action.payload}`) }))
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.create();
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