redux-helpers.js

import {set} from 'lodash'

export const epicGenerator = (generalType, fulfilledType, rejectedType, asyncCall) => {
  return (action$, store) => {
    return action$.filter(action => action.type === generalType)
      .flatMap(async (action) => {
        try {
          const payload = await asyncCall(action)
          return {
            type: fulfilledType,
            payload: payload
          }
        } catch (e) {
          return {
            type: rejectedType,
            error: error.message
          }
        }
      })
    }
}

export const setPlus = (parent, child, options = {}) => {
  set(parent, child, child)
  if (options.append) {
    options.append.forEach(val => {
      set(parent, `${child}.${val}`, `${child}.${val}`)
    })
  }
}

export const buildActions = (actions, append) => {
  const ACTIONS = {}
  actions.forEach(action => {
    setPlus(ACTIONS, action, {append})
  })
  return ACTIONS
}