Entities

As mentioned in the Domain layer section, your entities should contain your business logic, and have any services that the action requires to be injected. For example, to reset a user's password:

class ResetPassword {
  constructor(
    public readonly userId: string,
    public readonly password: string,
  ) {
  }
}

@CommandHandler(ResetPassword)
export class ResetPasswordHandler implements ICommandHandler<ResetPassword, User> {
  public constructor(
    private repository: UserRepository
  ) { }

  public async execute(command: ResetPassword) {
    const user = await this.repository.findOne(command.userId);

    if (!passwordValidator.isValid(newPassword)) {
      throw new Error(...);
    }

    user.updatePassword(passwordHasher.hash(newPassword));

    return await this.repository.save(user);
  }
}

class User extends AggregateRoot {
  public updatePassword(newPassword: string): void {
    this.password = newPassword;
  }
}