feat: add authorize middleware for validating permissions

api/src/middlewares/authenticateToken.ts

@@ -3,6 +3,7 @@ import jwt from 'jsonwebtoken'
 import { csrfProtection } from '../app'
 import { fetchLatestAutoExec, ModeType, verifyTokenInDB } from '../utils'
 import { desktopUser } from './desktop'
+import { authorize } from './authorize'
 
 export const authenticateAccessToken: RequestHandler = async (
   req,
@@ -24,7 +25,7 @@ export const authenticateAccessToken: RequestHandler = async (
       if (user) {
         if (user.isActive) {
           req.user = user
-          return csrfProtection(req, res, next)
+          return csrfProtection(req, res, () => authorize(req, res, next))
         } else return res.sendStatus(401)
       }
     }
@@ -34,7 +35,7 @@ export const authenticateAccessToken: RequestHandler = async (
   authenticateToken(
     req,
     res,
-    next,
+    () => authorize(req, res, next),
     process.env.ACCESS_TOKEN_SECRET as string,
     'accessToken'
   )

api/src/middlewares/authorize.ts

@@ -0,0 +1,34 @@
+import { RequestHandler } from 'express'
+import User from '../model/User'
+import Permission from '../model/Permission'
+import { PermissionSetting } from '../controllers/permission'
+
+export const authorize: RequestHandler = async (req, res, next) => {
+  let permission
+  const user = req.user
+  if (user) {
+    // no need to check for permissions when user is admin
+    if (user.isAdmin) return next()
+
+    const dbUser = await User.findOne({ id: user.userId })
+    if (!dbUser) return res.sendStatus(401)
+
+    const uri = req.baseUrl + req.path
+
+    // find permission w.r.t user
+    permission = await Permission.findOne({ uri, user: dbUser._id })
+
+    if (permission && permission.setting === PermissionSetting.grant)
+      return next()
+
+    // find permission w.r.t user's groups
+    for (const group of dbUser.groups) {
+      permission = await Permission.findOne({ uri, group })
+      if (permission && permission.setting === PermissionSetting.grant)
+        return next()
+    }
+
+    return res.sendStatus(401)
+  }
+  return res.sendStatus(401)
+}

api/src/middlewares/index.ts

@@ -2,3 +2,4 @@ export * from './authenticateToken'
 export * from './desktop'
 export * from './verifyAdmin'
 export * from './verifyAdminIfNeeded'
+export * from './authorize'