Fix JWT authentication, add custom user service

backend/src/application.ts

@@ -11,7 +11,7 @@ import path from 'path';
 import {MySequence} from './sequence';
 import {AuthenticationComponent} from '@loopback/authentication';
 import {JWTAuthenticationComponent, UserServiceBindings} from '@loopback/authentication-jwt';
-import {DatabaseDataSource} from './datasources';
+import {SzakdolgozatUserService} from './services';
 
 export {ApplicationConfig};
 
@@ -36,7 +36,7 @@ export class SzakdolgozatBackendApplication extends BootMixin(
     // Authentication
     this.component(AuthenticationComponent);
     this.component(JWTAuthenticationComponent);
-    this.dataSource(DatabaseDataSource, UserServiceBindings.DATASOURCE_NAME)
+    this.service(SzakdolgozatUserService, UserServiceBindings.USER_SERVICE);
 
     this.projectRoot = __dirname;
     // Customize @loopback/boot Booter Conventions here

backend/src/controllers/user.controller.ts

@@ -1,41 +1,28 @@
-import {Count, CountSchema, Filter, FilterExcludingWhere, MODEL_PROPERTIES_KEY, repository, Where,} from '@loopback/repository';
+import {Count, CountSchema, Filter, FilterExcludingWhere, repository, Where,} from '@loopback/repository';
 import {del, get, getModelSchemaRef, param, patch, post, put, requestBody, response,} from '@loopback/rest';
 import {User} from '../models';
 import {UserRepository} from '../repositories';
 import {
-  Credentials,
-  MyUserService,
   TokenServiceBindings,
   UserServiceBindings
 } from '@loopback/authentication-jwt';
-import {inject, MetadataInspector} from '@loopback/core';
+import {inject} from '@loopback/core';
 import {TokenService} from '@loopback/authentication';
 import {SecurityBindings, UserProfile} from '@loopback/security';
 import {genSalt, hash} from 'bcryptjs';
-import _ from 'lodash';
-import {UserRepository as UserRepo} from '@loopback/authentication-jwt';
+import {SzakdolgozatUserService} from '../services';
 
 export class UserController {
   constructor(
       @inject(TokenServiceBindings.TOKEN_SERVICE)
       public jwtService: TokenService,
       @inject(UserServiceBindings.USER_SERVICE)
-      public userService: MyUserService,
+      public userService: SzakdolgozatUserService,
       @inject(SecurityBindings.USER, {optional: true})
       public user: UserProfile,
-      @repository(UserRepo)
-      public userRepository : UserRepo,
       @repository(UserRepository)
-      public userDataRepository : UserRepository,
-  ) {}
-
-  static includeToExclude(values: (keyof User)[]): (keyof User)[] {
-    const metadata = MetadataInspector.getAllPropertyMetadata(MODEL_PROPERTIES_KEY, User);
-    if (metadata) {
-      return _.without(Object.keys(metadata), ...values) as (keyof User)[];
-    }
-    else throw new Error("No property metadata found");
-  }
+      public userRepository : UserRepository,
+  ) { }
 
   @post('/users')
   @response(200, {
@@ -62,7 +49,7 @@ export class UserController {
       password: password,
       role: 'student'
     } as User;
-    return this.userDataRepository.create(user);
+    return this.userRepository.create(user);
   }
 
   @post('/users/login', {
@@ -92,7 +79,7 @@ export class UserController {
         'application/json': {
           schema: getModelSchemaRef(User, {exclude: ['id', 'role', 'name']})
         },
-      }}) credentials: Credentials,
+      }}) credentials: Pick<User, 'email' | 'password'>,
   ): Promise<{token: string}> {
     // ensure the user exists, and the password is correct
     const user = await this.userService.verifyCredentials(credentials);
@@ -112,7 +99,7 @@ export class UserController {
   async count(
     @param.where(User) where?: Where<User>,
   ): Promise<Count> {
-    return this.userDataRepository.count(where);
+    return this.userRepository.count(where);
   }
 
   @get('/users')
@@ -130,7 +117,7 @@ export class UserController {
   async find(
     @param.filter(User) filter?: Filter<User>,
   ): Promise<User[]> {
-    return this.userDataRepository.find(filter);
+    return this.userRepository.find(filter);
   }
 
   @patch('/users')
@@ -149,7 +136,7 @@ export class UserController {
     user: User,
     @param.where(User) where?: Where<User>,
   ): Promise<Count> {
-    return this.userDataRepository.updateAll(user, where);
+    return this.userRepository.updateAll(user, where);
   }
 
   @get('/users/{id}')
@@ -165,7 +152,7 @@ export class UserController {
     @param.path.number('id') id: number,
     @param.filter(User, {exclude: 'where'}) filter?: FilterExcludingWhere<User>
   ): Promise<User> {
-    return this.userDataRepository.findById(id, filter);
+    return this.userRepository.findById(id, filter);
   }
 
   @patch('/users/{id}')
@@ -183,7 +170,7 @@ export class UserController {
     })
     user: User,
   ): Promise<void> {
-    await this.userDataRepository.updateById(id, user);
+    await this.userRepository.updateById(id, user);
   }
 
   @put('/users/{id}')
@@ -194,7 +181,7 @@ export class UserController {
     @param.path.number('id') id: number,
     @requestBody() user: User,
   ): Promise<void> {
-    await this.userDataRepository.replaceById(id, user);
+    await this.userRepository.replaceById(id, user);
   }
 
   @del('/users/{id}')
@@ -202,6 +189,6 @@ export class UserController {
     description: 'User DELETE success',
   })
   async deleteById(@param.path.number('id') id: number): Promise<void> {
-    await this.userDataRepository.deleteById(id);
+    await this.userRepository.deleteById(id);
   }
 }

backend/src/services/index.ts

@@ -0,0 +1 @@
+export * from './user.service';

backend/src/services/user.service.ts

@@ -0,0 +1,69 @@
+// Copyright IBM Corp. 2020. All Rights Reserved.
+// Node module: @loopback/authentication-jwt
+// This file is licensed under the MIT License.
+// License text available at https://opensource.org/licenses/MIT
+
+import {UserService} from '@loopback/authentication';
+import {repository} from '@loopback/repository';
+import {HttpErrors} from '@loopback/rest';
+import {securityId, UserProfile} from '@loopback/security';
+import {compare} from 'bcryptjs';
+import {User, UserWithRelations} from '../models';
+import {UserRepository} from '../repositories';
+
+/**
+ * A pre-defined type for user credentials. It assumes a user logs in
+ * using the email and password. You can modify it if your app has different credential fields
+ */
+export type Credentials = {
+  email: string;
+  password: string;
+};
+
+export class SzakdolgozatUserService implements UserService<User, Credentials> {
+  constructor(
+      @repository(UserRepository) public userRepository: UserRepository,
+  ) { }
+
+  async verifyCredentials(credentials: Credentials): Promise<User> {
+    const invalidCredentialsError = 'Invalid email or password.';
+
+    const foundUser = await this.userRepository.findOne({
+      where: {email: credentials.email},
+    });
+    if (!foundUser) {
+      throw new HttpErrors.Unauthorized(invalidCredentialsError);
+    }
+
+    const passwordMatched = await compare(
+        credentials.password,
+        foundUser.password,
+    );
+
+    if (!passwordMatched) {
+      throw new HttpErrors.Unauthorized(invalidCredentialsError);
+    }
+
+    return foundUser;
+  }
+
+  convertToUserProfile({email, id, name}: User): UserProfile {
+    return {
+      [securityId]: id!.toString(),
+      name,
+      id,
+      email,
+    };
+  }
+
+  //function to find user by id
+  async findUserById(id: number): Promise<User & UserWithRelations> {
+    const userNotfound = 'invalid user';
+    const foundUser = await this.userRepository.findById(id);
+
+    if (!foundUser) {
+      throw new HttpErrors.Unauthorized(userNotfound);
+    }
+    return foundUser;
+  }
+}