Merge pull request #143 from ets-cfuhrman-pfe/modularise-auth-methods

Modularise auth methods

client/src/App.tsx

@@ -23,13 +23,16 @@ import Header from './components/Header/Header';
 import Footer from './components/Footer/Footer';
 
 import ApiService from './services/ApiService';
+import OAuthCallback from './pages/AuthSelection/AuthCallback';
 
 const handleLogout = () => {
     ApiService.logout();
 };
 
 const isLoggedIn = () => {
-    return ApiService.isLoggedIn();
+    const test = ApiService.isLoggedIn();
+    console.log("App.tsx: " + test);
+    return test;
 };
 
 function App() {
@@ -71,6 +74,9 @@ function App() {
 
                         {/* Pages authentification sélection */}
                         <Route path="/auth-selection" element={<AuthSelection />} />
+                        
+                        {/* Pages authentification sélection */}
+                        <Route path="/oauth/callback" element={<OAuthCallback />} />
                     </Routes>
                 </main>
             </div>

client/src/components/Header/Header.tsx

@@ -1,4 +1,4 @@
-import { useNavigate } from 'react-router-dom';
+import { Link, useNavigate } from 'react-router-dom';
 import * as React from 'react';
 import './header.css';
 import { Button } from '@mui/material';
@@ -32,6 +32,14 @@ const Header: React.FC<HeaderProps> = ({ isLoggedIn, handleLogout }) => {
                     Logout
                 </Button>
             )}
+
+            {!isLoggedIn() && (
+                <div className="auth-selection-btn">
+                    <Link to="/auth-selection">
+                        <button className="auth-btn">Connexion</button>
+                    </Link>
+                </div>
+            )}
         </div>
     );
 };

client/src/pages/AuthSelection/AuthCallback.tsx

@@ -0,0 +1,27 @@
+import { useEffect } from 'react';
+import { useNavigate, useLocation } from 'react-router-dom';
+import apiService from '../../services/ApiService';
+
+const OAuthCallback: React.FC = () => {
+    const navigate = useNavigate();
+    const location = useLocation();
+
+    useEffect(() => {
+        const searchParams = new URLSearchParams(location.search);
+        const user = searchParams.get('user');
+
+        if (user) {
+            // Save user data to localStorage or sessionStorage
+            apiService.saveToken(user);
+
+            // Navigate to the dashboard or another page
+            navigate('/');
+        } else {
+            navigate('/auth-selection');
+        }
+    }, [location, navigate]);
+
+    return <div>Loading...</div>;
+};
+
+export default OAuthCallback;

client/src/pages/AuthSelection/AuthSelection.tsx

@@ -1,9 +1,9 @@
 import React, { useState, useEffect } from 'react';
 import { useNavigate } from 'react-router-dom';
 import './authselection.css';
+import SimpleLogin from './SimpleLogin';
 
 const AuthSelection: React.FC = () => {
-    const [simpleLoginData, setSimpleLoginData] = useState({ username: '', password: '' });
     const [authData, setAuthData] = useState<any>(null); // Stocke les données d'auth
     const navigate = useNavigate();
 
@@ -22,17 +22,6 @@ const AuthSelection: React.FC = () => {
         fetchAuthData(); // Appel de la fonction pour récupérer les données
     }, []);
 
-    const handleSimpleLoginChange = (e: React.ChangeEvent<HTMLInputElement>) => {
-        const { name, value } = e.target;
-        setSimpleLoginData((prev) => ({ ...prev, [name]: value }));
-    };
-
-    const handleSimpleLoginSubmit = (e: React.FormEvent) => {
-        e.preventDefault();
-        // Logique d'authentification pour Simple Login
-        console.log('Simple Login Data:', simpleLoginData);
-    };
-
     const handleAuthLogin = (provider: string) => {
         window.location.href = 'http://localhost:3000/api/auth/' + provider;
     };
@@ -44,25 +33,7 @@ const AuthSelection: React.FC = () => {
             {/* Formulaire de connexion Simple Login */}
             {authData && authData['simple-login'] && (
                 <div className="form-container">
-                    <form onSubmit={handleSimpleLoginSubmit}>
-                        <input
-                            type="text"
-                            name="username"
-                            placeholder="Nom d'utilisateur"
-                            value={simpleLoginData.username}
-                            onChange={handleSimpleLoginChange}
-                            required
-                        />
-                        <input
-                            type="password"
-                            name="password"
-                            placeholder="Mot de passe"
-                            value={simpleLoginData.password}
-                            onChange={handleSimpleLoginChange}
-                            required
-                        />
-                        <button type="submit">Se connecter</button>
-                    </form>
+                    <SimpleLogin/>
                 </div>
             )}
             

client/src/pages/AuthSelection/SimpleLogin.tsx

@@ -0,0 +1,94 @@
+import { useNavigate, Link } from 'react-router-dom';
+
+// JoinRoom.tsx
+import React, { useEffect, useState } from 'react';
+
+import './simpleLogin.css';
+import { TextField } from '@mui/material';
+import LoadingButton from '@mui/lab/LoadingButton';
+
+import LoginContainer from '../../components/LoginContainer/LoginContainer'
+import ApiService from '../../services/ApiService';
+
+const SimpleLogin: React.FC = () => {
+    const navigate = useNavigate();
+
+    const [email, setEmail] = useState('');
+    const [password, setPassword] = useState('');
+
+    const [connectionError, setConnectionError] = useState<string>('');
+    const [isConnecting] = useState<boolean>(false);
+
+    useEffect(() => {
+        return () => {
+
+        };
+    }, []);
+
+    const login = async () => {
+        const result = await ApiService.login(email, password);
+
+        if (result != true) {
+            setConnectionError(result);
+            return;
+        }
+        else {
+            navigate("/")
+        }
+
+    };
+
+
+    return (
+        <LoginContainer
+            title=''
+            error={connectionError}>
+
+            <TextField
+                label="Email"
+                variant="outlined"
+                value={email}
+                onChange={(e) => setEmail(e.target.value)}
+                placeholder="Nom d'utilisateur"
+                sx={{ marginBottom: '1rem' }}
+                fullWidth
+            />
+
+            <TextField
+                label="Mot de passe"
+                variant="outlined"
+                type="password"
+                value={password}
+                onChange={(e) => setPassword(e.target.value)}
+                placeholder="Nom de la salle"
+                sx={{ marginBottom: '1rem' }}
+                fullWidth
+            />
+
+            <LoadingButton
+                loading={isConnecting}
+                onClick={login}
+                variant="contained"
+                sx={{ marginBottom: `${connectionError && '2rem'}` }}
+                disabled={!email || !password}
+            >
+                Login
+            </LoadingButton>
+
+            <div className="login-links">
+
+                <Link to="/teacher/resetPassword">
+                    Réinitialiser le mot de passe
+                </Link>
+
+                <Link to="/teacher/register">
+                    Créer un compte
+                </Link>
+
+            </div>
+
+        </LoginContainer>
+    );
+};
+
+export default SimpleLogin;

client/src/pages/Home/Home.tsx

@@ -6,13 +6,6 @@ import { Link } from 'react-router-dom';
 const Home: React.FC = () => {
     return (
         <div className="page">
-
-            <div className="auth-selection-btn">
-                <Link to="/auth-selection">
-                    <button className="auth-btn">Connexion</button>
-                </Link>
-            </div>
-            
             <div className="btn-container">
 
                 <Link to="/student/join-room" className="student-btn">

client/src/services/ApiService.tsx

@@ -32,7 +32,7 @@ class ApiService {
     }
 
     // Helpers
-    private saveToken(token: string): void {
+    public saveToken(token: string): void {
         const now = new Date();
 
         const object = {

docker-compose.yaml

@@ -3,14 +3,18 @@ version: '3'
 services: 
 
   frontend:
-    image: fuhrmanator/evaluetonsavoir-frontend:latest
+    build:
+      context: ./server
+      dockerfile: Dockerfile
     container_name: frontend
     ports:
       - "5173:5173"
     restart: always
 
   backend:
-    image: fuhrmanator/evaluetonsavoir-backend:latest
+    build:
+      context: ./server
+      dockerfile: Dockerfile
     container_name: backend
     ports:
       - "3000:3000"

server/app.js

@@ -68,7 +68,6 @@ app.use(session({
 }));
 
 authManager = new AuthManager(app)
-
 app.use(errorHandler)
 
 // Start server

server/auth/modules/passport-providers/oauth.js

@@ -1,8 +1,19 @@
 var OAuth2Strategy = require('passport-oauth2')
+var authUserAssoc = require('../../../models/authUserAssociation')
+var users = require('../../../models/users')
+var { hasNestedValue } = require('../../../utils')
+var jwt = require('../../../middleware/jwtToken')
 
 class PassportOAuth {
+    constructor(passportjs,auth_name){
+        this.passportjs = passportjs
+        this.auth_name = auth_name
+    }
+
     register(app, passport,endpoint, name, provider) {
         const cb_url =`${process.env['BACKEND_URL']}${endpoint}/${name}/callback`
+        const self = this
+
         passport.use(name, new OAuth2Strategy({
             authorizationURL: provider.OAUTH_AUTHORIZATION_URL,
             tokenURL: provider.OAUTH_TOKEN_URL,
@@ -18,16 +29,33 @@ class PassportOAuth {
                 });
                 const userInfo = await userInfoResponse.json();
 
-                const user = {
-                    id: userInfo.sub,
+                let received_user = {
+                    auth_id: userInfo.sub,
                     email: userInfo.email,
                     name: userInfo.name,
-                    groups: userInfo.groups ?? [],
-                    accessToken: accessToken,
-                    refreshToken: refreshToken,
-                    expiresIn: params.expires_in
+                    roles: []
                 };
                 
+                if(hasNestedValue(userInfo,provider.OAUTH_ROLE_TEACHER_VALUE)) received_user.roles.push('teacher')
+                if(hasNestedValue(userInfo,provider.OAUTH_ROLE_STUDENT_VALUE)) received_user.roles.push('student')
+
+                const user_association = await authUserAssoc.find_user_association(self.auth_name._id,received_user.auth_id)
+
+                let user_account = null
+                if(user_association){
+                    user_account = await users.getById(user_association.user_id)
+                } 
+                else {
+                    let user_id = await users.getId(received_user.email)
+                    user_account = user_id ? await users.getById(user_id) : await users.register(received_user.email,"")
+                    await authUserAssoc.link(self.auth_name,received_user.auth_id,user_account._id)
+                }
+
+                user_account.name = received_user.name
+                user_account.roles = received_user.roles
+                await users.editUser(user_account)
+                self.passportjs.authenticate(user_account)
+
                 // Store the tokens in the session
                 req.session.oauth2Tokens = {
                     accessToken: accessToken,
@@ -35,7 +63,7 @@ class PassportOAuth {
                     expiresIn: params.expires_in
                 };
 
-                return done(null, user);
+                return done(null, user_account);
             } catch (error) {
                 console.error(`Erreur dans la strategie OAuth2 '${name}' : ${error}`);
                 return done(error);
@@ -55,7 +83,14 @@ class PassportOAuth {
             },
             (req, res) => {
                 if (req.user) {
-                    res.json(req.user)
+                    // res.json(req.user)
+
+                    //const redirectUrl = `http://your-frontend-url.com/oauth/callback?user=${encodeURIComponent(req.user)}`;
+                    //res.redirect(redirectUrl);
+
+                    const tokenToSave = jwt.create(req.user.email, req.user._id);
+                    res.redirect('/oauth/callback?user=' + tokenToSave);
+
                     console.info(`L'utilisateur '${req.user.name}' vient de se connecter`)
                 } else {
                     res.status(401).json({ error: "L'authentification a échoué" });

server/auth/modules/passport-providers/oidc.js

@@ -1,6 +1,14 @@
 var OpenIDConnectStrategy = require('passport-openidconnect')
+var authUserAssoc = require('../../../models/authUserAssociation')
+var users = require('../../../models/users')
+var { hasNestedValue } = require('../../../utils')
+var jwt = require('../../../middleware/jwtToken')
 
 class PassportOpenIDConnect {
+    constructor(passportjs,auth_name){
+        this.passportjs = passportjs
+        this.auth_name = auth_name
+    }
 
     async getConfigFromConfigURL(name,provider){
         try{
@@ -15,6 +23,7 @@ class PassportOpenIDConnect {
 
         const config = await this.getConfigFromConfigURL(name,provider)
         const cb_url =`${process.env['BACKEND_URL']}${endpoint}/${name}/callback`
+        const self = this
 
         passport.use(name, new OpenIDConnectStrategy({
             issuer: config.issuer,
@@ -30,15 +39,35 @@ class PassportOpenIDConnect {
         // patch pour la librairie permet d'obtenir les groupes, PR en cours mais "morte" : https://github.com/jaredhanson/passport-openidconnect/pull/101
         async function(req, issuer, profile, times, tok, done) {
             try {
-                const user = {
-                    id: profile.id,
+                const received_user = {
+                    auth_id: profile.id,
                     email: profile.emails[0].value,
                     name: profile.name.givenName,
-                    groups: profile.groups[0].value ?? []
+                    roles: []
                 };
-                return done(null, user);
-            } catch (error) {
 
+                if(hasNestedValue(profile,provider.OIDC_ROLE_TEACHER_VALUE)) received_user.roles.push('teacher')
+                if(hasNestedValue(profile,provider.OIDC_ROLE_STUDENT_VALUE)) received_user.roles.push('student')
+    
+                const user_association = await authUserAssoc.find_user_association(self.auth_name._id,received_user.auth_id)
+
+                let user_account = null
+                if(user_association){
+                    user_account = await users.getById(user_association.user_id)
+                } 
+                else {
+                    let user_id = await users.getId(received_user.email)
+                    user_account = user_id ? await users.getById(user_id) : await users.register(received_user.email,"")
+                    await authUserAssoc.link(self.auth_name,received_user.auth_id,user_account._id)
+                }
+
+                user_account.name = received_user.name
+                user_account.roles = received_user.roles
+                await users.editUser(user_account)
+                self.passportjs.authenticate(user_account)
+
+                return done(null, user_account);
+            } catch (error) {
             }
         }));
 
@@ -55,7 +84,11 @@ class PassportOpenIDConnect {
             },
             (req, res) => {
                 if (req.user) {
-                    res.json(req.user)
+                    // res.json(req.user)
+
+                    const tokenToSave = jwt.create(req.user.email, req.user._id);
+                    res.redirect('/oauth/callback?user=' + tokenToSave);
+
                     console.info(`L'utilisateur '${req.user.name}' vient de se connecter`)
                 } else {
                     res.status(401).json({ error: "L'authentification a échoué" });

server/auth/modules/passportjs.js

@@ -1,5 +1,6 @@
 const fs = require('fs');
 var passport = require('passport')
+var authprovider = require('../../models/authProvider')
 
 class PassportJs{
     constructor(authmanager,settings){
@@ -9,17 +10,20 @@ class PassportJs{
         this.endpoint = "/api/auth"
     }
 
-    registerAuth(expressapp){
+    async registerAuth(expressapp){
         expressapp.use(passport.initialize());
         expressapp.use(passport.session());
         
         for(const p of this.providers){
             for(const [name,provider] of Object.entries(p)){
+                const auth_id = `passportjs_${provider.type}_${name}`
+
                 if(!(provider.type in this.registeredProviders)){
-                    this.registerProvider(provider.type)
+                    this.registerProvider(provider.type,auth_id)
                 }
                 try{
                     this.registeredProviders[provider.type].register(expressapp,passport,this.endpoint,name,provider)
+                    authprovider.create(auth_id)
                 } catch(error){
                     console.error(`La connexion ${name} de type ${provider.type} n'as pu être chargé.`)
                 }
@@ -35,17 +39,26 @@ class PassportJs{
           });
     }
 
-    registerProvider(providerType){
+    async registerProvider(providerType,auth_id){
         try{
             const providerPath = `${process.cwd()}/auth/modules/passport-providers/${providerType}.js`
             const Provider = require(providerPath);
-            this.registeredProviders[providerType]= new Provider()
+            this.registeredProviders[providerType]= new Provider(this,auth_id)
             console.info(`Le type de connexion '${providerType}' a été ajouté dans passportjs.`)
         } catch(error){
             console.error(`Le type de connexion '${providerType}' n'as pas pu être chargé dans passportjs.`)
         }
     }
 
+
+    register(userinfos){
+        return this.authmanager.register(userinfos)
+    }
+
+    authenticate(userinfos){
+        return this.authmanager.login(userinfos)
+    }
+    
 }
 
 module.exports = PassportJs;

server/models/authProvider.js

@@ -0,0 +1,44 @@
+const db = require('../config/db.js')
+const { ObjectId } = require('mongodb');
+
+class AuthProvider {
+    constructor(name) {
+      this._id = new ObjectId();
+      this.name = name;
+    }
+
+    async getId(name){
+      await db.connect()
+      const conn = db.getConnection();
+
+      const collection = conn.collection('authprovider');
+
+      const existingauth = await collection.findOne({ name:name });
+
+      if(existingauth){
+        return existingauth._id
+      }
+      return null
+    }
+
+    async create(name) {
+      await db.connect()
+      const conn = db.getConnection();
+
+      const collection = conn.collection('authprovider');
+
+      const existingauth = await collection.findOne({ name:name });
+
+      if(existingauth){
+        return existingauth._id;
+      }
+
+      const newProvider = {
+        name:name
+      }
+      const result = await collection.insertOne(newProvider);
+      return result.insertedId;
+  }
+}
+
+module.exports = new AuthProvider;

server/models/authUserAssociation.js

@@ -0,0 +1,59 @@
+const authProvider = require('./authProvider.js')
+const db = require('../config/db.js')
+const { ObjectId } = require('mongodb');
+
+
+class AuthUserAssociation {
+    constructor(authProviderId, authId, userId) {
+      this._id = new ObjectId();
+      this.authProvider_id = authProviderId;
+      this.auth_id = authId;
+      this.user_id = userId;
+      this.connected = false;
+    }
+
+    async find_user_association(provider_name,auth_id){
+      await db.connect()
+      const conn = db.getConnection();
+
+      const collection = conn.collection('authUserAssociation');
+      const provider_id = await authProvider.getId(provider_name)
+
+      const userAssociation = await collection.findOne({ authProvider_id: provider_id,auth_id,auth_id });
+      return userAssociation
+    }
+
+    async link(provider_name,auth_id,user_id){
+      await db.connect()
+      const conn = db.getConnection();
+
+      const collection = conn.collection('authUserAssociation');
+      const provider_id = await authProvider.getId(provider_name)
+
+      const userAssociation = await collection.findOne({ authProvider_id: provider_id, user_id: user_id });
+
+      if(!userAssociation){
+        return await collection.insertOne({
+          _id:ObjectId,
+          authProvider_id:provider_id,
+          auth_id:auth_id,
+          user_id:user_id,
+        })
+      }
+    }
+
+    async unlink(provider_name,user_id){
+      await db.connect()
+      const conn = db.getConnection();
+
+      const collection = conn.collection('authUserAssociation');
+      const provider_id = await authProvider.getId(provider_name)
+
+      const userAssociation = await collection.findOne({ authProvider_id: provider_id, user_id: user_id });
+
+      if(userAssociation){
+        return await collection.deleteOne(userAssociation)
+      } else return null
+    }
+  }
+module.exports = new AuthUserAssociation;

server/models/userAuthAssociation.js

@@ -0,0 +1,13 @@
+const db = require('../config/db.js')
+const { ObjectId } = require('mongodb');
+
+
+class AuthUserAssoc {
+    constructor(authProviderId, authId, userId) {
+      this._id = new ObjectId();
+      this.authProvider_id = authProviderId;
+      this.auth_id = authId;
+      this.user_id = userId;
+    }
+  }
+  

server/models/users.js

@@ -1,14 +1,13 @@
 //user
-const db = require('../config/db.js');
-const bcrypt = require('bcrypt');
-const AppError = require('../middleware/AppError.js');
-const { USER_ALREADY_EXISTS } = require('../constants/errorCodes');
-const Folders = require('../models/folders.js');
+const db = require("../config/db.js");
+const bcrypt = require("bcrypt");
+const AppError = require("../middleware/AppError.js");
+const { USER_ALREADY_EXISTS } = require("../constants/errorCodes");
+const Folders = require("../models/folders.js");
 
 class Users {
-    
   async hashPassword(password) {
-        return await bcrypt.hash(password, 10)
+    return await bcrypt.hash(password, 10);
   }
 
   generatePassword() {
@@ -16,14 +15,14 @@ class Users {
   }
 
   async verify(password, hash) {
-        return await bcrypt.compare(password, hash)
+    return await bcrypt.compare(password, hash);
   }
 
   async register(email, password) {
-        await db.connect()
+    await db.connect();
     const conn = db.getConnection();
 
-        const userCollection = conn.collection('users');
+    const userCollection = conn.collection("users");
 
     const existingUser = await userCollection.findOne({ email: email });
 
@@ -34,23 +33,39 @@ class Users {
     const newUser = {
       email: email,
       password: await this.hashPassword(password),
-            created_at: new Date()
+      created_at: new Date(),
     };
 
-        await userCollection.insertOne(newUser);
+    let created_user = await userCollection.insertOne(newUser);
+    let user = await this.getById(created_user.insertedId)
 
-        const folderTitle = 'Dossier par Défaut'; 
+    const folderTitle = "Dossier par Défaut";
     const userId = newUser._id.toString();
     await Folders.create(folderTitle, userId);
 
     // TODO: verif if inserted properly...
+    return user;
+  }
+
+  async login(userid) {
+    await db.connect();
+    const conn = db.getConnection();
+
+    const userCollection = conn.collection("users");
+    const user = await userCollection.findOne({ _id: userid });
+
+    if (!user) {
+      return false;
+    }
+
+    return user;
   }
 
   async login(email, password) {
-        await db.connect()
+    await db.connect();
     const conn = db.getConnection();
 
-        const userCollection = conn.collection('users');
+    const userCollection = conn.collection("users");
 
     const user = await userCollection.findOne({ email: email });
 
@@ -74,25 +89,28 @@ class Users {
   }
 
   async changePassword(email, newPassword) {
-        await db.connect()
+    await db.connect();
     const conn = db.getConnection();
 
-        const userCollection = conn.collection('users');
+    const userCollection = conn.collection("users");
 
     const hashedPassword = await this.hashPassword(newPassword);
 
-        const result = await userCollection.updateOne({ email }, { $set: { password: hashedPassword } });
+    const result = await userCollection.updateOne(
+      { email },
+      { $set: { password: hashedPassword } }
+    );
 
     if (result.modifiedCount != 1) return null;
 
-        return newPassword
+    return newPassword;
   }
 
   async delete(email) {
-        await db.connect()
+    await db.connect();
     const conn = db.getConnection();
 
-        const userCollection = conn.collection('users');
+    const userCollection = conn.collection("users");
 
     const result = await userCollection.deleteOne({ email });
 
@@ -102,10 +120,10 @@ class Users {
   }
 
   async getId(email) {
-        await db.connect()
+    await db.connect();
     const conn = db.getConnection();
 
-        const userCollection = conn.collection('users');
+    const userCollection = conn.collection("users");
 
     const user = await userCollection.findOne({ email: email });
 
@@ -116,6 +134,47 @@ class Users {
     return user._id;
   }
 
+  async getById(id) {
+    await db.connect();
+    const conn = db.getConnection();
+
+    const userCollection = conn.collection("users");
+
+    const user = await userCollection.findOne({ _id: id });
+
+    if (!user) {
+      return false;
     }
 
-module.exports = new Users;
+    return user;
+  }
+
+  async editUser(userInfo) {
+    await db.connect();
+    const conn = db.getConnection();
+
+    const userCollection = conn.collection("users");
+
+    const user = await userCollection.findOne({ _id: userInfo.id });
+
+    if (!user) {
+      return false;
+    }
+
+    const updatedFields = { ...userInfo };
+    delete updatedFields.id;
+
+    const result = await userCollection.updateOne(
+      { _id: userInfo.id },
+      { $set: updatedFields }
+    );
+
+    if (result.modifiedCount === 1) {
+      return true;
+    }
+
+    return false;
+  }
+}
+
+module.exports = new Users();

server/utils.js

@@ -0,0 +1,35 @@
+function hasNestedValue(obj, path, delimiter = "_") {
+  const keys = path.split(delimiter);
+  let current = obj;
+
+  for (const key of keys) {
+    while(Array.isArray(current) && current.length == 1 && current[0]){
+      current = current[0]
+    }
+    while(current['value']){
+      current = current.value
+    }
+    
+    if (current && typeof current === "object") {
+      if (Array.isArray(current)) {
+        const index = current.findIndex(x => x == key)
+        if (index != -1) {
+          current = current[index];
+        } else {
+          return false;
+        }
+      } else if (key in current) {
+        current = current[key];
+      } else {
+        return false;
+      }
+    } else {
+      return false;
+    }
+  }
+
+  return true;
+}
+
+
+module.exports = { hasNestedValue};