source: src/main/java/com/project/beautycenter/service/impl/KlientiServiceImpl.java

package com.project.beautycenter.service.impl;

import com.project.beautycenter.model.Klienti;
import com.project.beautycenter.model.Users;
import com.project.beautycenter.repository.KlientiRepository;
import com.project.beautycenter.repository.UsersRepository;
import com.project.beautycenter.service.KlientiService;
import org.springframework.stereotype.Service;

import java.util.List;


@Service
public class KlientiServiceImpl implements KlientiService {
    private final KlientiRepository klientiRepository;
    private final UsersRepository usersRepository;

    public KlientiServiceImpl(KlientiRepository klientiRepository, UsersRepository usersRepository) {
        this.klientiRepository = klientiRepository;
        this.usersRepository = usersRepository;
    }

    @Override
    public List<Klienti> listAll() {
        return this.klientiRepository.findAll();
    }

    @Override
    public Klienti findById(Integer id) {
        return this.klientiRepository.findById(id).orElseThrow(NullPointerException::new);
    }

    @Override
    public Klienti delete(Integer id) {
        Klienti klient = this.findById(id);
        this.klientiRepository.delete(klient);
        return klient;
    }

    @Override
    public Klienti create(Users users, String ime, String prezime, String telBr, String email) {

        Users user = this.usersRepository.getById(users.getId());
        Klienti klienti = new Klienti(user, ime, prezime, telBr, email);

        return this.klientiRepository.save(klienti);
    }

    @Override
    public Klienti update(Integer id, String ime, String prezime, String telBr, String email) {
        Klienti klienti = this.klientiRepository.findById(id).orElseThrow(NullPointerException::new);
        klienti.setId(id);
        klienti.setIme(ime);
        klienti.setPrezime(prezime);
        klienti.setTelBr(telBr);
        klienti.setEMail(email);
        return this.klientiRepository.save(klienti);
    }
}