mayor-model-cache/lib/stores/model-cache-store.js

A nuclear-js module provides a cache for your models

'use strict';

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

var _actionTypes = require('../action-types');

var _actionTypes2 = _interopRequireDefault(_actionTypes);

var _nuclearJs = require('nuclear-js');

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

var STORE_NAME = exports.STORE_NAME = '@@mayor/model-cache';

/**
 * ModelCacheStore is used for storing arbitrary model objects.
 */
exports.default = (0, _nuclearJs.Store)({
  getInitialState: function getInitialState() {
    return (0, _nuclearJs.toImmutable)({});
  },
  initialize: function initialize() {
    this.on(_actionTypes2.default.MODEL_CACHE_LOAD_ENTITY, load);
    this.on(_actionTypes2.default.MODEL_CACHE_REMOVE_ENTITY, remove);
  }
});

/**
 * Loads data into cache using given model.
 *
 * @public
 * @param {Immutable.Map} cache - store state
 * @param {object} payload
 * @return {Immutable.Map}
 */

function load(cache, payload) {
  var model = payload.model;
  var data = payload.data;

  cache = ensureEntityContainer(cache, model.entity);

  return cache.withMutations(function (cache) {
    data.forEach(function (entry) {
      cache.setIn([model.entity, entry.id], (0, _nuclearJs.toImmutable)(entry));
    });
  });
}

/**
 * Removes data from cache with given id
 *
 * @public
 * @param {Immutable.Map} cache - store state
 * @param {object} payload
 * @return {Immutable.Map}
 */
function remove(cache, payload) {
  var model = payload.model;
  var data = payload.data;

  cache = ensureEntityContainer(cache, model.entity);

  return cache.removeIn([model.entity, payload.data.id]);
}

/**
 * Ensures cache has a container map for given entity.
 *
 * @public
 * @param {Immutable.Map} cache - store state
 * @param {string} entity - model entity
 * @return {Immutable.Map}
 */
function ensureEntityContainer(cache, entity) {
  if (!cache.has(entity)) {
    cache = cache.set(entity, (0, _nuclearJs.toImmutable)({}));
  }

  return cache;
}