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server/src/api-v1/auth/auth.service.ts

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+import { BadRequestException, Injectable, InternalServerErrorException, Logger } from '@nestjs/common';
+import { InjectRepository } from '@nestjs/typeorm';
+import { Repository } from 'typeorm';
+import { UserEntity } from '../user/entities/user.entity';
+import { LoginCredentialDto } from './dto/login-credential.dto';
+import { ImmichJwtService } from '../../modules/immich-jwt/immich-jwt.service';
+import { JwtPayloadDto } from './dto/jwt-payload.dto';
+import { SignUpDto } from './dto/sign-up.dto';
+import * as bcrypt from 'bcrypt';
+
+@Injectable()
+export class AuthService {
+  constructor(
+    @InjectRepository(UserEntity)
+    private userRepository: Repository<UserEntity>,
+    private immichJwtService: ImmichJwtService,
+  ) {}
+
+  private async validateUser(loginCredential: LoginCredentialDto): Promise<UserEntity> {
+    const user = await this.userRepository.findOne(
+      { email: loginCredential.email },
+      { select: ['id', 'email', 'password', 'salt'] },
+    );
+
+    const isAuthenticated = await this.validatePassword(user.password, loginCredential.password, user.salt);
+
+    if (user && isAuthenticated) {
+      return user;
+    }
+
+    return null;
+  }
+
+  public async login(loginCredential: LoginCredentialDto) {
+    const validatedUser = await this.validateUser(loginCredential);
+
+    if (!validatedUser) {
+      throw new BadRequestException('Incorrect email or password');
+    }
+
+    const payload = new JwtPayloadDto(validatedUser.id, validatedUser.email);
+
+    return {
+      accessToken: await this.immichJwtService.generateToken(payload),
+      userId: validatedUser.id,
+      userEmail: validatedUser.email,
+    };
+  }
+
+  public async signUp(signUpCrendential: SignUpDto) {
+    const registerUser = await this.userRepository.findOne({ email: signUpCrendential.email });
+
+    if (registerUser) {
+      throw new BadRequestException('User exist');
+    }
+
+    const newUser = new UserEntity();
+    newUser.email = signUpCrendential.email;
+    newUser.salt = await bcrypt.genSalt();
+    newUser.password = await this.hashPassword(signUpCrendential.password, newUser.salt);
+
+    try {
+      const savedUser = await this.userRepository.save(newUser);
+
+      return {
+        id: savedUser.id,
+        email: savedUser.email,
+        createdAt: savedUser.createdAt,
+      };
+    } catch (e) {
+      Logger.error('e', 'signUp');
+      throw new InternalServerErrorException('Failed to register new user');
+    }
+  }
+
+  private async hashPassword(password: string, salt: string): Promise<string> {
+    return bcrypt.hash(password, salt);
+  }
+
+  private async validatePassword(hasedPassword: string, inputPassword: string, salt: string): Promise<boolean> {
+    const hash = await bcrypt.hash(inputPassword, salt);
+    return hash === hasedPassword;
+  }
+}