modules-pack/api/modules/location/reducers.js

JavaScript Modules for Modern Frontend & Backend Projects

import { handleActions } from 'modules-pack/redux'
import { stateActionType } from 'modules-pack/redux/actions'
import { ERROR, UPDATE } from 'utils-pack'
import { NAME as LOCATION, } from './constants'
import initState from './data'

/**
 * ACTION HANDLERS =============================================================
 * Pure Functions Only - business logic to handle actions and update app state
 * =============================================================================
 */

/* Handler */
const handler = handleActions({

  [stateActionType(LOCATION, UPDATE)]: (state, {payload}) => {
    return {
      ...state,
      geoJSON: payload
    }
  },

  [stateActionType(LOCATION, ERROR)]: (state, {payload: {message} = {}}) => {
    // Alert error message once
    if (state.geoJSON || state.geoJSON === 0) {
      alert(`${message}\n\nPlease enable Location Services.`)
    }

    return {
      ...state,
      geoJSON: null  // Use to detect that Location is not available
    }
  }

}, initState)

export default handler