fix: show loading spinner on login screen while request is in process

web/src/components/login.tsx

@@ -2,7 +2,14 @@ import axios from 'axios'
 import React, { useState, useContext } from 'react'
 import PropTypes from 'prop-types'
 
-import { CssBaseline, Box, TextField, Button } from '@mui/material'
+import {
+  Backdrop,
+  CircularProgress,
+  CssBaseline,
+  Box,
+  TextField,
+  Button
+} from '@mui/material'
 import { AppContext } from '../context/appContext'
 
 const login = async (payload: { username: string; password: string }) =>
@@ -10,21 +17,27 @@ const login = async (payload: { username: string; password: string }) =>
 
 const Login = () => {
   const appContext = useContext(AppContext)
+  const [isLoading, setIsLoading] = useState(false)
   const [username, setUsername] = useState('')
   const [password, setPassword] = useState('')
   const [errorMessage, setErrorMessage] = useState('')
 
   const handleSubmit = async (e: any) => {
+    setIsLoading(true)
     setErrorMessage('')
     e.preventDefault()
 
     const { loggedIn, user } = await login({
       username,
       password
-    }).catch((err: any) => {
-      setErrorMessage(err.response?.data || err.toString())
-      return {}
     })
+      .catch((err: any) => {
+        setErrorMessage(err.response?.data || err.toString())
+        return {}
+      })
+      .finally(() => {
+        setIsLoading(false)
+      })
 
     if (loggedIn) {
       appContext.setUserId?.(user.id)
@@ -37,42 +50,51 @@ const Login = () => {
   }
 
   return (
-    <Box
-      className="container"
-      component="form"
-      onSubmit={handleSubmit}
-      sx={{
-        '& > :not(style)': { m: 1, width: '25ch' }
-      }}
-    >
-      <CssBaseline />
-      <br />
-      <h2 style={{ width: 'auto' }}>Welcome to SASjs Server!</h2>
-      <TextField
-        id="username"
-        label="Username"
-        type="text"
-        variant="outlined"
-        onChange={(e: any) => setUsername(e.target.value)}
-        required
-      />
-      <TextField
-        id="password"
-        label="Password"
-        type="password"
-        variant="outlined"
-        onChange={(e: any) => setPassword(e.target.value)}
-        required
-      />
-      {errorMessage && <span>{errorMessage}</span>}
-      <Button
-        type="submit"
-        variant="outlined"
-        disabled={!appContext.setLoggedIn}
+    <>
+      <Backdrop
+        sx={{ color: '#fff', zIndex: (theme) => theme.zIndex.drawer + 1 }}
+        open={isLoading}
       >
-        Submit
-      </Button>
-    </Box>
+        <CircularProgress color="inherit" />
+      </Backdrop>
+
+      <Box
+        className="container"
+        component="form"
+        onSubmit={handleSubmit}
+        sx={{
+          '& > :not(style)': { m: 1, width: '25ch' }
+        }}
+      >
+        <CssBaseline />
+        <br />
+        <h2 style={{ width: 'auto' }}>Welcome to SASjs Server!</h2>
+        <TextField
+          id="username"
+          label="Username"
+          type="text"
+          variant="outlined"
+          onChange={(e: any) => setUsername(e.target.value)}
+          required
+        />
+        <TextField
+          id="password"
+          label="Password"
+          type="password"
+          variant="outlined"
+          onChange={(e: any) => setPassword(e.target.value)}
+          required
+        />
+        {errorMessage && <span>{errorMessage}</span>}
+        <Button
+          type="submit"
+          variant="outlined"
+          disabled={!appContext.setLoggedIn}
+        >
+          Submit
+        </Button>
+      </Box>
+    </>
   )
 }