Added admin check to admin page

src/App.js

@@ -75,7 +75,8 @@ class App extends Component {
             <Switch>
               <Route path={process.env.PUBLIC_URL + '/login'} render={() => (
                 this.props.user ?
-                  <Redirect to={process.env.PUBLIC_URL + '/register'} /> :
+                  (this.props.user.admin? <Redirect to={process.env.PUBLIC_URL + '/administration'} /> : <Redirect to={process.env.PUBLIC_URL + '/register'} />)
+                  :
                   <LoginPage />
               )} />
               <Route exact path={process.env.PUBLIC_URL + '/'} render={() => <Redirect to={process.env.PUBLIC_URL + '/login'} />} />

src/components/AdminPage.js

@@ -3,6 +3,25 @@ import { connect } from 'react-redux'
 import './TopicFormPage.css'
 
 class AdminPage extends React.Component {
+  componentWillMount() {
+    try {
+      if (window.localStorage.getItem('loggedInUser') === null) {
+        window.location.replace(process.env.PUBLIC_URL + '/')
+      } else {
+        const token = JSON.parse(window.localStorage.getItem('loggedInUser'))
+        if (!token.user.admin || token === undefined || token === null) {
+          window.location.replace(process.env.PUBLIC_URL + '/')
+        }
+      }
+    } catch (e) {
+      console.log('error happened', e.response)
+      this.props.setError('Some error happened')
+      setTimeout(() => {
+        this.props.clearNotifications()
+      }, 3000)
+    }
+  }
+
   render() {
     return (
       <div className="admin-page-container">