reedx/src/utils/createActions.js

Like redux but with less code

import reduce from './reduce'

const { assign, keys } = Object

const isError = (prop) => prop instanceof Error
const isUndefined = (prop) => !prop && prop === undefined

export const createFSA = (type) => (payload, meta) => {
  let action = { type }

  if (isError(payload)) {
    action = assign({}, action, { payload, error: true })
  }

  if (payload && !isUndefined(payload)) {
    action = assign({}, action, { payload })
  }

  if (!isUndefined(meta)) {
    action = assign({}, action, { meta })
  }

  return action
}

const createActionsObject = (types) => (obj, reducer, idx) =>
  assign({}, obj, { [reducer]: createFSA(types[idx]) })

const createActions = (types, reducers) =>
  reduce(keys(reducers), createActionsObject(types), {})

export default createActions