smsb-web-develop/src/permission.js

import router from './router'
import store from './store'
import NProgress from 'nprogress' // progress bar
import 'nprogress/nprogress.css' // progress bar style
import { cancelRequest } from './utils/request'

NProgress.configure({ showSpinner: false }) // NProgress Configuration

const whiteList = ['/error'] // no redirect whitelist

router.beforeEach(async (to, from, next) => {
  cancelRequest()
  // start progress bar
  NProgress.start()

  if (store.getters.token) {
    // determine whether the user has obtained his permission roles through getInfo
    const hasRoles = store.getters.roles?.length > 0
    if (hasRoles) {
      if (to.path === '/error') {
        // redirect to the home page
        next({ path: '/' })
        NProgress.done() // hack: https://github.com/PanJiaChen/vue-element-admin/pull/2939
      } else {
        next()
      }
    } else {
      try {
        // get user info
        const { roles } = await store.dispatch('user/getInfo')

        // generate accessible routes map based on roles
        const accessRoutes = await store.dispatch('permission/generateRoutes', roles)

        // dynamically add accessible routes
        router.addRoutes(accessRoutes)

        // hack method to ensure that addRoutes is complete
        // set the replace: true, so the navigation will not leave a history record
        next({ ...to, replace: true })
      } catch (error) {
        // remove token
        await store.dispatch('user/resetToken')
        next(`/error?code=400`)
        NProgress.done()
      }
    }
  } else {
    /* has no token*/
    if (whiteList.indexOf(to.path) !== -1) {
      // in the free login whitelist, go directly
      next()
    } else {
      // other pages that do not have permission to access are redirected to the login page.
      next(`/error?code=403`)
      NProgress.done()
    }
  }
})

router.afterEach(() => {
  // finish progress bar
  NProgress.done()
})