hooks/useSettings.js


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import React, { createContext, useState, useEffect, useContext } from 'react'
import translations from 'configs/translations'
import useUser from 'hooks/useUser'

const SettingsContext = createContext()

export const SettingsProvider = ({children}) => {
  const defaultSettings = {theme: 'green', language: 'en'}
  const {user} = useUser()
  const [data, setData] = useState()

  const setSettings = s => {
    if (typeof window !== "undefined") {
      window.localStorage.setItem('loggedOutSettings', JSON.stringify(s(data)))
    }
    setData(s)
  }

  const t = key => data && data.language && translations[data.language][key]
    ? translations[data.language][key]
      ? translations[data.language][key]
      : translations.en[key]
    : '...'

  useEffect(() => {
    const loggedOutSettings = JSON.parse(localStorage.getItem('loggedOutSettings'))

    if (user && user.isLoggedIn) {
      const settings = {theme: user.theme, language: user.language}
      if (typeof window !== "undefined") {
        window.localStorage.setItem('loggedOutSettings', JSON.stringify(settings))
      }
      setData(settings)
    } else if (loggedOutSettings) {
      setData(loggedOutSettings)
    } else {
      setData(defaultSettings)
    }
  }, [user])

  return (
    <SettingsContext.Provider value={{settings: data, setSettings, t}}>
      {children}
    </SettingsContext.Provider>
  )
}

const useSettings = () => useContext(SettingsContext)

export default useSettings