ola-toolkit/lib/components/ReduxCreator/createReducer.js

ola 开发工具套件

'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.initialState = undefined;
exports.createBasicReducer = createBasicReducer;
exports.createExtensibleReducer = createExtensibleReducer;

var _immutable = require('immutable');

var _immutable2 = _interopRequireDefault(_immutable);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

var initialState = exports.initialState = (0, _immutable.Map)({
  loaded: false,
  loading: false,
  error: null,
  payload: (0, _immutable.Map)({
    page: (0, _immutable.Map)()
  })
});

/**
 * 创建简单Reducer
 * @param actionNames
 * @returns {Function}
 */
function createBasicReducer(actionNames) {

  return function () {
    var state = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : initialState;
    var action = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};

    switch (action.type) {
      case actionNames.fetch:

        return state.set('loaded', false).set('loading', true);

      case actionNames.success:
      case actionNames.update:

        return state.set('loading', false).set('loaded', true).set('error', null).set('payload', action.payload);

      case actionNames.fail:

        return state.set('loading', false).set('loaded', false).set('error', action.payload).set('payload', initialState.get('payload'));

      case actionNames.clear:

        return state.set('loading', false).set('loaded', false).set('error', null).set('payload', initialState.get('payload'));

      default:
        return state;
    }
  };
}

/**
 * 创建可扩展数据的 Reducer
 * @param keys
 * @param actionNames
 * @returns {Function}
 *
 * @example
 * makeExtensibleReducer([{
        key: 'topicList',
        type: Array
    }], ...);
 */
function createExtensibleReducer(actionNames) {
  var keys = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : [];


  return function () {
    var state = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : initialState;
    var action = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};

    switch (action.type) {
      case actionNames.fetch:

        return state.set('loading', true);

      case actionNames.success:

        var payload = action.payload;

        keys.forEach(function (key) {
          var toBeExtend = state.get('payload').get(key);

          if (_immutable.List.isList(payload.get(key))) {

            toBeExtend = toBeExtend || (0, _immutable.List)();
            payload = payload.set(key, toBeExtend.concat(payload.get(key)));
          } else if (_immutable.Map.isMap(payload.get(key))) {

            toBeExtend = toBeExtend || (0, _immutable.Map)();
            payload = payload.set(key, toBeExtend.merge(payload.get(key)));
          }
        });

        return state.set('loading', false).set('loaded', true).set('error', null).set('payload', payload);

      case actionNames.update:

        return state.set('loading', false).set('loaded', true).set('error', null).set('payload', action.payload);

      case actionNames.fail:

        return state.set('loading', false).set('loaded', false).set('error', action.get('error')).set('payload', action.get('payload'));

      case actionNames.clear:

        return state.set('loading', false).set('loaded', false).set('payload', initialState.get('payload')).set('error', null);

      default:
        return state;
    }
  };
}