feature-redux/lib/slicedReducer.js

feature-u redux integration

'use strict';

exports.__esModule = true;
exports.default = slicedReducer;

var _verify = require('./util/verify');

var _verify2 = _interopRequireDefault(_verify);

var _lodash = require('lodash.isstring');

var _lodash2 = _interopRequireDefault(_lodash);

var _lodash3 = require('lodash.isfunction');

var _lodash4 = _interopRequireDefault(_lodash3);

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

// NOTE: See README for complete description
function slicedReducer(slice, reducer) {

  // validate parameters
  var check = _verify2.default.prefix('slicedReducer() parameter violation: ');

  check(slice, 'slice is required');
  check((0, _lodash2.default)(slice), 'slice must be a string');

  check(reducer, 'reducer is required');
  check((0, _lodash4.default)(reducer), 'reducer must be a function');

  // auto generate a standard selector for our sliced state
  var nodeNames = slice.split('.');
  function getSlicedState(appState) {
    // console.log(`xx in selector getSlicedState(): `, {nodeNames, appState});
    return nodeNames.reduce(function (runningNode, nodeName) {
      return runningNode[nodeName];
    }, appState);
  }

  // embellish/return the supplied reducer
  reducer.slice = slice;
  reducer.getSlicedState = getSlicedState;
  return reducer;
}