ducks
Version:
🦆🦆🦆 Ducks is a Reducer Bundles Manager that Implementing the Redux Ducks Modular Proposal with Great Convenience.
57 lines • 2.36 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.insertReducers = void 0;
/**
* Ducks - https://github.com/huan/ducks
*
* @copyright 2020 Huan LI (李卓桓) <https://github.com/huan>
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
const redux_1 = require("redux");
/**
* We have to do some tricky with insertReducer.
* because the Redux reduce system will check matching for the the keys of the state and reducers.
*/
function insertReducers(originReducer, insertReducers) {
const insertReducer = (0, redux_1.combineReducers)(insertReducers);
const newReducer = (state, action) => {
const prevOriginalState = {}; // ReturnType<typeof reducer>
const prevInsertedState = {}; // StateFromReducersMapObject<typeof insertReducers>
if (state) {
Object.keys(state).forEach(key => {
if (key in insertReducers) {
prevInsertedState[key] = state[key];
}
else {
prevOriginalState[key] = state[key];
}
});
}
const nextOriginalState = originReducer(prevOriginalState, action);
// console.info('nextOriginalState === prevOriginalState', nextOriginalState === prevOriginalState)
const nextInsertedState = insertReducer(prevInsertedState, action);
// console.info('nextInsertedState === prevInsertedState', nextInsertedState === prevInsertedState)
if (nextOriginalState === prevOriginalState && nextInsertedState === prevInsertedState) {
return state;
}
return {
...nextOriginalState,
...nextInsertedState,
};
};
return newReducer;
}
exports.insertReducers = insertReducers;
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