@raphaeldeveloper/whoiam.domain/UserAccount/CreateUser.js

Project with domain rules about user authentication.

module.exports = class CreateUser {
    constructor(userRepository) {
        this.userRepository = userRepository;
    }

    do(user) {
        if (!user.userName || !user.email || !user.password) {
            return;
        }

        if (this.userRepository.getByUserName(user.userName)) {
            return;
        }

        if (this.userRepository.getByEmail(user.email)) {
            return;
        }

        this.userRepository.insert(user);
    }
}