source: src/main/java/com/project/beautycenter/web/KlientiController.java

package com.project.beautycenter.web;

import com.project.beautycenter.model.Klienti;
import com.project.beautycenter.service.KlientiService;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestParam;

import java.util.List;

@Controller
public class KlientiController {
    private final KlientiService klientiService;

    public KlientiController(KlientiService klientiService) {

        this.klientiService = klientiService;
    }

    @GetMapping("/clients")
    public String showClients(Model model) {
        List<Klienti> klienti = this.klientiService.listAll();

        model.addAttribute("klienti", klienti);

        return "clients.html";
    }

    @GetMapping("/clients/{id}/edit")
    public String showEdit(@PathVariable Integer id, Model model) {
        Klienti klient = this.klientiService.findById(id);

        model.addAttribute("klient", klient);
        return "edit_form.html";
    }

    @PostMapping("/clients/{id}")
    public String update(@PathVariable Integer id,
                         @RequestParam String ime,
                         @RequestParam String prezime,
                         @RequestParam String telBr,
                         @RequestParam String email) {
        this.klientiService.update(id, ime, prezime, telBr, email);
        return "redirect:/clients";
    }

}