Reducer helpers

reducer_helpers.js

import _ from 'lodash'
import { createActions as createReduxActions } from 'redux-actions'
// That is simple functions (getFromStorage -> (key, fromSession) => window[fromSession ? 'sessionStorage' : 'localStorage'].getItem(key)
import { getFromStorage, saveToStorage } from './storage'

const convertStringToReduxPath = str => _.upperCase(str).replace(/ /g, '_')

export const createReducer = (map, name, modificator) =>
  _.reduce(
    map,
    (reducerMap, reducer, key) => {
      reducerMap[`${name}/${convertStringToReduxPath(key)}`] = modificator
        ? (...args) => modificator(reducer(...args))
        : reducer
      return reducerMap
    },
    {}
  )

export const createActions = (reducerMap, overrideActions = {}) => {
  let actionsPath = ''
  const actionsMap = _.reduce(
    reducerMap,
    (actionsMap, reducer, key) => {
      const [actionsName, actionName] = key.split('/')
      if (!actionsMap[actionsName]) {
        actionsPath = actionsName
        actionsMap[actionsName] = {}
      }
      actionsMap[actionsName][actionName] =
        overrideActions[_.camelCase(actionName)]
      return actionsMap
    },
    {}
  )
  const reduxActions = createReduxActions(actionsMap)
  return reduxActions[_.camelCase(actionsPath)]
}

export const createCachableState = (stateName, defaultState, saveToSession) => {
  const key = `${stateName}-state`
  const modificator = state =>
    state
      ? saveToStorage(key, state, saveToSession)
      : getFromStorage(key, defaultState, saveToSession)

  return { initialState: modificator() || defaultState, modificator }
}