@actualwave/redux-create-reducer/createReducer.js

Function that combines reducers and calls them when action of same name received

'use strict';

Object.defineProperty(exports, '__esModule', { value: true });

function baseStateCreator() {
  return {};
}

function createReducerFromActionHandlers(actionHandlers, initialStateCreator) {
  if (initialStateCreator === undefined) {
    initialStateCreator = baseStateCreator;
  }

  return function(state, action) {
    if (state === undefined) {
      state = initialStateCreator();
    }

    const reducer = actionHandlers[action.type];

    if (reducer) {
      return reducer(state, action);
    }

    return state;
  };
}

function createReducer(exports) {
  const reducer = createReducerFromActionHandlers(exports, exports.default);

  return function(state, action) {
    if (action.type === 'default') {
      return state;
    }

    return reducer(state, action);
  };
}

function createReducers(exportsMap) {
  return Object.keys(exportsMap).reduce(function(reducers, key) {
    reducers[key] = createReducer(exportsMap[key]);

    return reducers;
  }, {});
}

exports.createReducer = createReducer;
exports.createReducers = createReducers;
exports.default = createReducer;