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Injectable,
UnauthorizedException,
ConflictException,
BadRequestException,
NotFoundException,
} from '@nestjs/common';
import { InjectRepository } from '@nestjs/typeorm';
import { Repository, DataSource } from 'typeorm';
import { JwtService } from '@nestjs/jwt';
import { ConfigService } from '@nestjs/config';
import * as bcrypt from 'bcrypt';
import * as crypto from 'crypto';
import { User, Session, Token } from '../entities';
import { RegisterDto, LoginDto, ChangePasswordDto } from '../dto';
export interface AuthResponse {
user: Partial<User>;
accessToken: string;
refreshToken: string;
}
export interface JwtPayload {
sub: string;
email: string;
tenant_id: string;
}
@Injectable()
export class AuthService {
constructor(
@InjectRepository(User)
private readonly userRepository: Repository<User>,
@InjectRepository(Session)
private readonly sessionRepository: Repository<Session>,
@InjectRepository(Token)
private readonly tokenRepository: Repository<Token>,
private readonly jwtService: JwtService,
private readonly configService: ConfigService,
private readonly dataSource: DataSource,
) {}
/**
* Register new user with tenant context
*/
async register(
dto: RegisterDto,
tenantId: string,
ip?: string,
userAgent?: string,
): Promise<AuthResponse> {
// Check if email already exists for this tenant
const existing = await this.userRepository.findOne({
where: { email: dto.email, tenant_id: tenantId },
});
if (existing) {
throw new ConflictException('Email ya registrado en esta organización');
}
// Hash password
const passwordHash = await bcrypt.hash(dto.password, 12);
// Create user
const user = this.userRepository.create({
tenant_id: tenantId,
email: dto.email,
password_hash: passwordHash,
first_name: dto.first_name || null,
last_name: dto.last_name || null,
phone: dto.phone || null,
status: 'pending_verification',
email_verified: false,
});
await this.userRepository.save(user);
// Generate tokens
const tokens = await this.generateTokens(user, ip, userAgent);
// Create email verification token
await this.createVerificationToken(user);
return {
user: this.sanitizeUser(user),
...tokens,
};
}
/**
* Login user
*/
async login(
dto: LoginDto,
tenantId: string,
ip?: string,
userAgent?: string,
): Promise<AuthResponse> {
// Find user
const user = await this.userRepository.findOne({
where: { email: dto.email, tenant_id: tenantId },
});
if (!user) {
throw new UnauthorizedException('Credenciales inválidas');
}
// Validate password
const isValid = await bcrypt.compare(dto.password, user.password_hash);
if (!isValid) {
throw new UnauthorizedException('Credenciales inválidas');
}
// Check user status
if (user.status === 'suspended') {
throw new UnauthorizedException('Cuenta suspendida');
}
if (user.status === 'inactive') {
throw new UnauthorizedException('Cuenta inactiva');
}
// Update last login
user.last_login_at = new Date();
user.last_login_ip = ip || null;
await this.userRepository.save(user);
// Generate tokens
const tokens = await this.generateTokens(user, ip, userAgent);
return {
user: this.sanitizeUser(user),
...tokens,
};
}
/**
* Logout user - invalidate session
*/
async logout(userId: string, sessionToken: string): Promise<void> {
await this.sessionRepository.update(
{ user_id: userId, session_token: sessionToken },
{ is_active: false },
);
}
/**
* Logout all sessions for user
*/
async logoutAll(userId: string): Promise<void> {
await this.sessionRepository.update(
{ user_id: userId },
{ is_active: false },
);
}
/**
* Refresh access token
*/
async refreshToken(
refreshToken: string,
ip?: string,
userAgent?: string,
): Promise<{ accessToken: string; refreshToken: string }> {
try {
// Verify refresh token
const payload = this.jwtService.verify<JwtPayload>(refreshToken, {
secret: this.configService.get<string>('jwt.secret'),
});
// Find user
const user = await this.userRepository.findOne({
where: { id: payload.sub },
});
if (!user) {
throw new UnauthorizedException('Usuario no encontrado');
}
// Find session with this refresh token
const refreshTokenHash = this.hashToken(refreshToken);
const session = await this.sessionRepository.findOne({
where: {
user_id: user.id,
refresh_token_hash: refreshTokenHash,
is_active: true,
},
});
if (!session) {
throw new UnauthorizedException('Sesión inválida');
}
// Check if session expired
if (new Date() > session.expires_at) {
await this.sessionRepository.update({ id: session.id }, { is_active: false });
throw new UnauthorizedException('Sesión expirada');
}
// Generate new tokens
const tokens = await this.generateTokens(user, ip, userAgent, session.id);
return tokens;
} catch (error) {
if (error instanceof UnauthorizedException) {
throw error;
}
throw new UnauthorizedException('Token inválido');
}
}
/**
* Change password for authenticated user
*/
async changePassword(
userId: string,
dto: ChangePasswordDto,
): Promise<{ message: string }> {
const user = await this.userRepository.findOne({
where: { id: userId },
});
if (!user) {
throw new NotFoundException('Usuario no encontrado');
}
// Validate current password
const isValid = await bcrypt.compare(dto.currentPassword, user.password_hash);
if (!isValid) {
throw new BadRequestException('Password actual incorrecto');
}
// Validate new password is different
if (dto.currentPassword === dto.newPassword) {
throw new BadRequestException('El nuevo password debe ser diferente al actual');
}
// Hash new password
const newHash = await bcrypt.hash(dto.newPassword, 12);
// Update password
await this.userRepository.update({ id: userId }, { password_hash: newHash });
// Optionally invalidate all sessions except current
// await this.logoutAll(userId);
return { message: 'Password actualizado correctamente' };
}
/**
* Request password reset
*/
async requestPasswordReset(email: string, tenantId: string): Promise<{ message: string }> {
const user = await this.userRepository.findOne({
where: { email, tenant_id: tenantId },
});
// Always return success to prevent email enumeration
if (!user) {
return { message: 'Si el email existe, recibirás instrucciones para restablecer tu password' };
}
// Create reset token
const token = crypto.randomBytes(32).toString('hex');
const tokenHash = this.hashToken(token);
await this.tokenRepository.save({
user_id: user.id,
tenant_id: tenantId,
token_type: 'password_reset',
token_hash: tokenHash,
expires_at: new Date(Date.now() + 60 * 60 * 1000), // 1 hour
});
// TODO: Send email with reset link containing token
return { message: 'Si el email existe, recibirás instrucciones para restablecer tu password' };
}
/**
* Reset password with token
*/
async resetPassword(
token: string,
newPassword: string,
tenantId: string,
): Promise<{ message: string }> {
const tokenHash = this.hashToken(token);
const tokenRecord = await this.tokenRepository.findOne({
where: {
token_hash: tokenHash,
tenant_id: tenantId,
token_type: 'password_reset',
is_used: false,
},
});
if (!tokenRecord) {
throw new BadRequestException('Token inválido o expirado');
}
if (new Date() > tokenRecord.expires_at) {
throw new BadRequestException('Token expirado');
}
// Hash new password
const passwordHash = await bcrypt.hash(newPassword, 12);
// Update password
await this.userRepository.update(
{ id: tokenRecord.user_id },
{ password_hash: passwordHash },
);
// Mark token as used
await this.tokenRepository.update(
{ id: tokenRecord.id },
{ is_used: true, used_at: new Date() },
);
// Invalidate all sessions
await this.logoutAll(tokenRecord.user_id);
return { message: 'Password restablecido correctamente' };
}
/**
* Verify email with token
*/
async verifyEmail(token: string, tenantId: string): Promise<{ message: string }> {
const tokenHash = this.hashToken(token);
const tokenRecord = await this.tokenRepository.findOne({
where: {
token_hash: tokenHash,
tenant_id: tenantId,
token_type: 'email_verification',
is_used: false,
},
});
if (!tokenRecord) {
throw new BadRequestException('Token inválido o expirado');
}
if (new Date() > tokenRecord.expires_at) {
throw new BadRequestException('Token expirado');
}
// Update user
await this.userRepository.update(
{ id: tokenRecord.user_id },
{
email_verified: true,
email_verified_at: new Date(),
status: 'active',
},
);
// Mark token as used
await this.tokenRepository.update(
{ id: tokenRecord.id },
{ is_used: true, used_at: new Date() },
);
return { message: 'Email verificado correctamente' };
}
/**
* Validate user by ID (for JWT strategy)
*/
async validateUser(userId: string): Promise<User | null> {
return this.userRepository.findOne({
where: { id: userId, status: 'active' },
});
}
/**
* Get current user profile
*/
async getProfile(userId: string): Promise<Partial<User>> {
const user = await this.userRepository.findOne({
where: { id: userId },
});
if (!user) {
throw new NotFoundException('Usuario no encontrado');
}
return this.sanitizeUser(user);
}
// ==================== Private Methods ====================
private async generateTokens(
user: User,
ip?: string,
userAgent?: string,
existingSessionId?: string,
): Promise<{ accessToken: string; refreshToken: string }> {
const payload: JwtPayload = {
sub: user.id,
email: user.email,
tenant_id: user.tenant_id,
};
const accessTokenExpiry = this.configService.get<string>('jwt.expiresIn') || '15m';
const refreshTokenExpiry = this.configService.get<string>('jwt.refreshExpiresIn') || '7d';
const accessToken = this.jwtService.sign(payload, {
expiresIn: accessTokenExpiry as any,
});
const refreshToken = this.jwtService.sign(payload, {
expiresIn: refreshTokenExpiry as any,
});
const sessionToken = crypto.randomBytes(32).toString('hex');
const refreshTokenHash = this.hashToken(refreshToken);
if (existingSessionId) {
// Update existing session
await this.sessionRepository.update(
{ id: existingSessionId },
{
refresh_token_hash: refreshTokenHash,
last_activity_at: new Date(),
expires_at: new Date(Date.now() + 7 * 24 * 60 * 60 * 1000),
},
);
} else {
// Create new session
await this.sessionRepository.save({
user_id: user.id,
tenant_id: user.tenant_id,
session_token: sessionToken,
refresh_token_hash: refreshTokenHash,
ip_address: ip || null,
user_agent: userAgent || null,
device_type: this.detectDeviceType(userAgent),
expires_at: new Date(Date.now() + 7 * 24 * 60 * 60 * 1000),
last_activity_at: new Date(),
is_active: true,
});
}
return { accessToken, refreshToken };
}
private async createVerificationToken(user: User): Promise<string> {
const token = crypto.randomBytes(32).toString('hex');
const tokenHash = this.hashToken(token);
await this.tokenRepository.save({
user_id: user.id,
tenant_id: user.tenant_id,
token_type: 'email_verification',
token_hash: tokenHash,
expires_at: new Date(Date.now() + 24 * 60 * 60 * 1000), // 24 hours
});
return token;
}
private hashToken(token: string): string {
return crypto.createHash('sha256').update(token).digest('hex');
}
private sanitizeUser(user: User): Partial<User> {
const { password_hash, ...sanitized } = user;
return sanitized;
}
private detectDeviceType(userAgent?: string): string {
if (!userAgent) return 'unknown';
const ua = userAgent.toLowerCase();
if (/mobile|android|iphone|ipod/.test(ua)) return 'mobile';
if (/tablet|ipad/.test(ua)) return 'tablet';
return 'desktop';
}
}
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