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Injectable,
Logger,
NotFoundException,
ConflictException,
BadRequestException,
} from '@nestjs/common';
import { InjectRepository } from '@nestjs/typeorm';
import { Repository, In } from 'typeorm';
import { ConfigService } from '@nestjs/config';
import * as crypto from 'crypto';
import { Invitation, InvitationStatus } from '../entities/invitation.entity';
import { User } from '../../auth/entities/user.entity';
import { Tenant } from '../../tenants/entities/tenant.entity';
import { EmailService } from '../../email/services/email.service';
import { InviteUserDto, InvitationResponseDto } from '../dto/invite-user.dto';
@Injectable()
export class InvitationService {
private readonly logger = new Logger(InvitationService.name);
private readonly invitationExpirationDays = 7;
constructor(
@InjectRepository(Invitation)
private readonly invitationRepository: Repository<Invitation>,
@InjectRepository(User)
private readonly userRepository: Repository<User>,
@InjectRepository(Tenant)
private readonly tenantRepository: Repository<Tenant>,
private readonly emailService: EmailService,
private readonly configService: ConfigService,
) {}
/**
* Send an invitation to join the tenant
*/
async invite(
dto: InviteUserDto,
inviterId: string,
tenantId: string,
): Promise<InvitationResponseDto> {
const email = dto.email.toLowerCase().trim();
// Check if user already exists in this tenant
const existingUser = await this.userRepository.findOne({
where: { email, tenant_id: tenantId },
});
if (existingUser) {
throw new ConflictException('Este email ya está registrado en la organización');
}
// Check if there's already a pending invitation for this email
const existingInvitation = await this.invitationRepository.findOne({
where: {
email,
tenant_id: tenantId,
status: 'pending' as InvitationStatus,
},
});
if (existingInvitation) {
throw new ConflictException('Ya existe una invitación pendiente para este email');
}
// Get inviter and tenant info for the email
const [inviter, tenant] = await Promise.all([
this.userRepository.findOne({ where: { id: inviterId } }),
this.tenantRepository.findOne({ where: { id: tenantId } }),
]);
if (!inviter) {
throw new NotFoundException('Usuario invitador no encontrado');
}
if (!tenant) {
throw new NotFoundException('Organización no encontrada');
}
// Generate secure token
const token = this.generateSecureToken();
// Calculate expiration date
const expiresAt = new Date();
expiresAt.setDate(expiresAt.getDate() + this.invitationExpirationDays);
// Create invitation record
const invitation = this.invitationRepository.create({
tenant_id: tenantId,
email,
token,
status: 'pending' as InvitationStatus,
expires_at: expiresAt,
created_by: inviterId,
message: dto.message || null,
metadata: { role: dto.role },
});
await this.invitationRepository.save(invitation);
// Send invitation email
await this.sendInvitationEmail(invitation, inviter, tenant, dto.role);
this.logger.log(`Invitation sent to ${email} for tenant ${tenant.name}`);
return this.toResponseDto(invitation, dto.role);
}
/**
* List all invitations for a tenant
*/
async findAllByTenant(tenantId: string): Promise<InvitationResponseDto[]> {
// First, update any expired invitations
await this.expireOldInvitations(tenantId);
const invitations = await this.invitationRepository.find({
where: { tenant_id: tenantId },
order: { created_at: 'DESC' },
});
return invitations.map((inv) => this.toResponseDto(inv, inv.metadata?.role || 'member'));
}
/**
* Resend an invitation email
*/
async resend(token: string, inviterId: string, tenantId: string): Promise<InvitationResponseDto> {
const invitation = await this.invitationRepository.findOne({
where: { token, tenant_id: tenantId },
});
if (!invitation) {
throw new NotFoundException('Invitación no encontrada');
}
if (invitation.status !== 'pending') {
throw new BadRequestException('Solo se pueden reenviar invitaciones pendientes');
}
// Get inviter and tenant info
const [inviter, tenant] = await Promise.all([
this.userRepository.findOne({ where: { id: inviterId } }),
this.tenantRepository.findOne({ where: { id: tenantId } }),
]);
Iif (!inviter || !tenant) {
throw new NotFoundException('Usuario o organización no encontrada');
}
// Generate new token
const newToken = this.generateSecureToken();
// Reset expiration
const expiresAt = new Date();
expiresAt.setDate(expiresAt.getDate() + this.invitationExpirationDays);
// Update invitation
invitation.token = newToken;
invitation.expires_at = expiresAt;
await this.invitationRepository.save(invitation);
// Resend email
const role = invitation.metadata?.role || 'member';
await this.sendInvitationEmail(invitation, inviter, tenant, role);
this.logger.log(`Invitation resent to ${invitation.email}`);
return this.toResponseDto(invitation, role);
}
/**
* Cancel a pending invitation
*/
async cancel(id: string, tenantId: string): Promise<void> {
const invitation = await this.invitationRepository.findOne({
where: { id, tenant_id: tenantId },
});
if (!invitation) {
throw new NotFoundException('Invitación no encontrada');
}
if (invitation.status !== 'pending') {
throw new BadRequestException('Solo se pueden cancelar invitaciones pendientes');
}
// Hard delete the invitation
await this.invitationRepository.remove(invitation);
this.logger.log(`Invitation ${id} cancelled for ${invitation.email}`);
}
/**
* Find invitation by token (for accepting invitations)
*/
async findByToken(token: string): Promise<Invitation | null> {
const invitation = await this.invitationRepository.findOne({
where: { token },
});
if (!invitation) {
return null;
}
// Check if expired
if (invitation.expires_at < new Date() && invitation.status === 'pending') {
invitation.status = 'expired';
await this.invitationRepository.save(invitation);
}
return invitation;
}
/**
* Generate a cryptographically secure token
*/
private generateSecureToken(): string {
return crypto.randomBytes(32).toString('hex');
}
/**
* Send invitation email
*/
private async sendInvitationEmail(
invitation: Invitation,
inviter: User,
tenant: Tenant,
role: string,
): Promise<void> {
const appUrl = this.configService.get<string>('APP_URL', 'http://localhost:3000');
const inviteUrl = `${appUrl}/invite/${invitation.token}`;
const expiresIn = `${this.invitationExpirationDays} días`;
await this.emailService.sendTemplateEmail({
to: { email: invitation.email },
templateKey: 'invitation',
variables: {
inviterName: inviter.fullName || inviter.email,
tenantName: tenant.name,
role: this.translateRole(role),
inviteLink: inviteUrl,
expiresIn,
appName: this.configService.get<string>('APP_NAME', 'Template SaaS'),
},
});
}
/**
* Update expired invitations status
*/
private async expireOldInvitations(tenantId: string): Promise<void> {
await this.invitationRepository
.createQueryBuilder()
.update(Invitation)
.set({ status: 'expired' as InvitationStatus })
.where('tenant_id = :tenantId', { tenantId })
.andWhere('status = :status', { status: 'pending' })
.andWhere('expires_at < NOW()')
.execute();
}
/**
* Translate role for display
*/
private translateRole(role: string): string {
const translations: Record<string, string> = {
admin: 'Administrador',
member: 'Miembro',
viewer: 'Visor',
};
return translations[role] || role;
}
/**
* Convert invitation to response DTO
*/
private toResponseDto(invitation: Invitation, role: string): InvitationResponseDto {
return {
id: invitation.id,
email: invitation.email,
role,
status: invitation.status,
expires_at: invitation.expires_at,
created_at: invitation.created_at,
};
}
}
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