bdn-pocket/es/messenger/make_path_reducer.js

pocket tools for managing redux and redux-saga

'use strict';

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

var _has = require('ramda/src/has');

var _has2 = _interopRequireDefault(_has);

var _path = require('ramda/src/path');

var _path2 = _interopRequireDefault(_path);

var _assocPath = require('ramda/src/assocPath');

var _assocPath2 = _interopRequireDefault(_assocPath);

var _dissocPath = require('ramda/src/dissocPath');

var _dissocPath2 = _interopRequireDefault(_dissocPath);

var _make_reducer = require('./make_reducer');

var _make_reducer2 = _interopRequireDefault(_make_reducer);

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

function ensureArray(v) {
  return Array.isArray(v) ? v : [v];
}

var DELETE_KEY = {
  del: 'my key'
};

function makePathReducer(messenger, pathGetter) {
  var defaultState = messenger.defaultState;

  var subReducer = (0, _make_reducer2.default)(messenger);
  var reducers = messenger.reducers;

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

    if (!(0, _has2.default)(action.type, reducers)) return state;
    var pathArr = ensureArray(pathGetter(action));
    var subState = (0, _path2.default)(pathArr, state);
    var newSubState = subReducer(subState, action);

    return newSubState === DELETE_KEY ? (0, _dissocPath2.default)(pathArr, state) : (0, _assocPath2.default)(pathArr, newSubState, state);
  };
  return reducer;
}

makePathReducer.DELETE_KEY = DELETE_KEY;

exports.default = makePathReducer;