chore: code refactored

package.json

@@ -45,6 +45,6 @@
   },
   "configuration": {
     "sasPath": "/opt/sas/sas9/SASHome/SASFoundation/9.4/sasexe/sas",
-    "sasJsPort": 4000
+    "sasJsPort": 5000
   }
 }

public/401.html

@@ -1,3 +1,3 @@
 Unauthorized
 
-<a href="/signin" role="button">Sign-in</a>
+<a href="/signin-with-azure" role="button">Sign-in</a>

src/app.ts

@@ -1,54 +1,26 @@
 import path from 'path'
 import express from 'express'
-import session from 'express-session'
-
-// import msalWrapper from 'msal-express-wrapper'
-const msalWrapper = require('msal-express-wrapper')
 
 import indexRouter from './routes'
-
-require('dotenv').config()
-import { appSettings } from './appSettings'
+import { AuthMechanism } from './types'
+import { getAzureSubApp } from './authMechanisms'
 
 const app = express()
-
 app.use(express.json({ limit: '50mb' }))
-
 app.use(express.static(path.join(__dirname, '..', 'public')))
 
-/**
- * Using express-session middleware. Be sure to familiarize yourself with available options
- * and set them as desired. Visit: https://www.npmjs.com/package/express-session
- */
-const sessionConfig = {
-  secret: appSettings.appCredentials.clientSecret,
-  resave: false,
-  saveUninitialized: false,
-  cookie: {
-    secure: false // set this to true on production
-  }
+require('dotenv').config()
+
+const authMechanisms = process.env.AUTH?.split(' ') ?? [
+  AuthMechanism.NoSecurity
+]
+
+if (authMechanisms.includes(AuthMechanism.Azure)) {
+  app.use(getAzureSubApp())
+} else {
+  app.get('/', indexRouter)
 }
 
-if (app.get('env') === 'production') {
-  app.set('trust proxy', 1) // trust first proxy
-  sessionConfig.cookie.secure = true // serve secure cookies
-}
-
-app.use(session(sessionConfig))
-
-// instantiate the wrapper
-const authProvider = new msalWrapper.AuthProvider(appSettings)
-
-// initialize the wrapper
-app.use(authProvider.initialize())
-
-// authentication routes
-app.get('/signin', authProvider.signIn({ successRedirect: '/' }))
-app.get('/signout', authProvider.signOut({ successRedirect: '/' }))
-
-// secure routes
-app.get('/', authProvider.isAuthenticated(), indexRouter)
-
 app.get('/error', (req, res) => res.redirect('/500.html'))
 app.get('/unauthorized', (req, res) => res.redirect('/401.html'))
 app.get('*', (req, res) => res.status(404).redirect('/404.html'))

src/appSettings.ts

@@ -1,12 +0,0 @@
-export const appSettings = {
-  appCredentials: {
-    clientId: process.env.CLIENTID as string,
-    tenantId: process.env.TENANTID as string,
-    clientSecret: process.env.CLIENTSECRET as string
-  },
-  authRoutes: {
-    redirect: '/redirect',
-    error: '/error', // the wrapper will redirect to this route in case of any error.
-    unauthorized: '/unauthorized' // the wrapper will redirect to this route in case of unauthorized access attempt.
-  }
-}

src/authMechanisms/azure.ts

@@ -0,0 +1,57 @@
+import express from 'express'
+import session from 'express-session'
+import indexRouter from '../routes'
+
+export const getAzureSubApp = () => {
+  console.log('Using Azure Authentication')
+  const app = express()
+
+  const msalWrapper = require('msal-express-wrapper')
+  const appSettings = {
+    appCredentials: {
+      clientId: process.env.CLIENTID ?? ' ',
+      tenantId: process.env.TENANTID ?? ' ',
+      clientSecret: process.env.CLIENTSECRET ?? ' '
+    },
+    authRoutes: {
+      redirect: '/redirect',
+      error: '/error', // the wrapper will redirect to this route in case of any error.
+      unauthorized: '/unauthorized' // the wrapper will redirect to this route in case of unauthorized access attempt.
+    }
+  }
+
+  /**
+   * Using express-session middleware. Be sure to familiarize yourself with available options
+   * and set them as desired. Visit: https://www.npmjs.com/package/express-session
+   */
+  const sessionConfig = {
+    secret: appSettings.appCredentials.clientSecret,
+    resave: false,
+    saveUninitialized: false,
+    cookie: {
+      secure: false // set this to true on production
+    }
+  }
+
+  if (app.get('env') === 'production') {
+    app.set('trust proxy', 1) // trust first proxy
+    sessionConfig.cookie.secure = true // serve secure cookies
+  }
+
+  app.use(session(sessionConfig))
+
+  // instantiate the wrapper
+  const authProvider = new msalWrapper.AuthProvider(appSettings)
+
+  // initialize the wrapper
+  app.use(authProvider.initialize())
+
+  // authentication routes
+  app.get('/signin-with-azure', authProvider.signIn({ successRedirect: '/' }))
+  app.get('/signout-with-azure', authProvider.signOut({ successRedirect: '/' }))
+
+  // secure routes
+  app.get('/', authProvider.isAuthenticated(), indexRouter)
+
+  return app
+}

src/authMechanisms/index.ts

@@ -0,0 +1 @@
+export * from './azure'

src/types/authMechanism.ts

@@ -0,0 +1,4 @@
+export enum AuthMechanism {
+  Azure = 'azure',
+  NoSecurity = 'nosecurity'
+}

src/types/index.ts

@@ -1,3 +1,4 @@
 export * from './sas'
 export * from './request'
 export * from './fileTree'
+export * from './authMechanism'