nested-combine-reducers
Version:
Allows you to create your root reducer in one go, instead of individually combine slice reducers
38 lines • 1.67 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.nestedCombineReducers = void 0;
const redux_1 = require("redux");
/**
* Takes a Reducers maps with multiple levels of nesting and turns it into in a single reducing function.
*
* @param map An object whose values are either reducing functions or other objects
*/
function nestedCombineReducers(map) {
if (!map)
throw new Error('You must specify a reducers map.');
const flatReducersMapObject = {};
const recursiveMapKeys = Object.keys(map);
for (const recursiveMapKey of recursiveMapKeys) {
const recursiveMapValue = map[recursiveMapKey];
if (recursiveMapValue === null) {
continue;
}
if (recursiveMapValue === undefined) {
continue;
}
//Hopefully a reducer function, let's store it to combine it later
if (typeof recursiveMapValue === 'function') {
const reducer = recursiveMapValue;
flatReducersMapObject[recursiveMapKey] = reducer;
}
//Nesting found, let's go deeper !
if (typeof recursiveMapValue === 'object') {
const nestedRecursiveReducersMapObject = recursiveMapValue;
flatReducersMapObject[recursiveMapKey] = nestedCombineReducers(nestedRecursiveReducersMapObject);
}
}
//Once all the properties have been processed, the ReducersMap is no longer incomplete and can be combined one last time
return redux_1.combineReducers(flatReducersMapObject);
}
exports.nestedCombineReducers = nestedCombineReducers;
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