redux-persist-immutable/lib/reconciler.js

top level immutablejs support for redux-persist

'use strict';

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

var _immutable = require('immutable');

function stateReconciler(state, inboundState, reducedState, logger) {
  var newState = reducedState ? reducedState : (0, _immutable.Map)();

  Object.keys(inboundState).forEach(function (key) {
    // if initialState does not have key, skip auto rehydration
    if (!state.has(key)) return;

    // if reducer modifies substate, skip auto rehydration
    if (state.get(key) !== reducedState.get(key)) {
      if (logger) console.log('redux-persist/autoRehydrate: sub state for key `%s` modified, skipping autoRehydrate.', key);
      newState = newState.set(key, reducedState.get(key));
      return;
    }

    // otherwise take the inboundState
    if (state.has(key)) {
      newState = newState.mergeIn([key], inboundState[key]); // shallow merge
    } else {
      newState = newState.set(key, inboundState[key]); // hard set
    }

    if (logger) console.log('redux-persist/autoRehydrate: key `%s`, rehydrated to ', key, newState.get(key));
  });

  return newState;
}