apemanstore/lib/reducer.js

/**
 * Reducer for apemanstore
 * @function reducer
 * @param {Object} state - State object
 * @param {Object} action - Redux action object
 */
'use strict'

const ERROR_SCOPE_NAME = '/errors'
const { assign } = require('asobj')
const {
  reducer: operationReducer
} = require('bredux-operate')

/** @lends reducer */
function reducer (state = { [ERROR_SCOPE_NAME]: {} }, action) {
  let { type, payload, meta = {}, error: isError } = action
  let isRedux = /^@@redux/.test(type)
  if (isRedux) {
    return state
  }
  if (isError) {
    let errorState = state[ ERROR_SCOPE_NAME ] || {}
    return assign({}, state, {
      [ERROR_SCOPE_NAME]: reducer(errorState, { type, payload, meta })
    })
  }
  let [ operationName, scopeName ] = type.split(':').reverse()
  if (!operationName) {
    return state
  }
  let scopeState = scopeName ? state[ scopeName ] : state
  let reduced = operationReducer(scopeState, { type: operationName, payload, meta })
  let assigning = scopeName ? { [scopeName]: reduced } : reduced
  return assign({}, state, assigning)
}

module.exports = reducer