SpringDvdRental/src/main/java/org/example/StartPage.java - master - AlexStone/Java25sep

SpringDvdRental/src/main/java/org/example/StartPage.java
172 строки7 KB
AlexStone
HomeWork
24 апр 2026, 08:10
24 апр 2026, 08:10a550197
package org.example;

import jakarta.servlet.http.HttpSession;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.servlet.view.RedirectView;

import java.util.HashMap;
import java.util.List;
import java.util.stream.Collectors;

@RestController
public class StartPage {
    public  static HashMap<String,Integer> AmountAboutSession = new HashMap<>();
    @Autowired
    CustomerRepository customerRepository;

    @GetMapping("/")
    public String index(){
        String page =
                "<!DOCTYPE html>\n" +
                "<html>\n" +
                "<head>\n" +
                "<link rel ='stylesheet' href='styles.css'/>"+
                "<meta charset=\"utf-8\"/>\n" +
                "</head>\n" +
                "<body>\n" +
                        "<h1>Главная страница</h1>"+
                "<li><a href='/Composer_listStart'>Список посетителей</a></li>"+
                "</body>" +
                "</html>";
        return page;
    }
    @GetMapping("/Composer_listStart")
    public String Composer_listStart(HttpSession session){
        Integer value = (Integer) session.getAttribute("Number");
        Integer Number=AmountAboutSession.get(session.getId());
        List<Customer> listAllCustomers = customerRepository.getAllCustomer();
        int quantity = listAllCustomers.size();
        if (Number == null){
            Number=0;
        }
        int pageOfcustomers = ((Number+10)/10);
        int allPageOfCustomers = 0;
        if (quantity % 10 == 0){
            quantity=quantity-1;
        }
        allPageOfCustomers=(quantity+10-1)/10;
        List<Customer> first10 = customerRepository.get10Customer(Number);
        String page =
                "<!DOCTYPE html>\n" +
                "<html>\n" +
                "<head>\n" +
                "<meta charset=\"utf-8\"/>\n" +
                "</head>\n" +
                "<body>\n" +
                "<font color='DarkRed' size='5' <h1>Список посетителей</h1></font>"+
                "<font color='Blue'><p><b>Страница "+pageOfcustomers+" из "+allPageOfCustomers+"</b></p></font>";

            page+=  first10.stream()
                    .map(a -> "<li>    "+a.first_name+"  "+a.last_name+"</li>")
                    .collect(Collectors.joining("<br>"));

        if (quantity-Number<10){

        }
        else {
            page += "<br>"+
                    "<form style='display:inline' method='POST' action='/next_page'>" +
                    "<input type='submit' value='Следующая страница'/>" +
                    "</form>";
        }
            if (Number==0){

            }
            else {
                page += "<form style='display:inline' method='POST' action='/previous_page'>" +
                        "<input type='submit' value='Предыдущая страница'/>" +
                        "</form>";
            }

        if (Number==0){

        }
        else {
            page += "<form style='display:inline' method='POST' action='/zeroing_page'>" +
                    "<input type='submit' value='В начало списка'/>" +
                    "</form>";

        }
            page += "<form method='POST' action='/selected_page'"+
                    "<label for='Pages'>Укажите страницу (1-60)</label>"+
                    "<input type='number' id='Pages' name='SelectPage' min='1' max=60 </input>>"+
                    "<input type='submit'>"+
                    "</form>";
            page += "<form method='get' action='/search_customer'>"+
                    "<p>Поиск</p>"+
                    "<input type='search' name='query'>"+
                    "<input type='submit'>"+
                    "</form>";

            page+=  "<br>"+
                    "<br><a href='/'> Вернуться на главную страницу </a>\n" +
                    "</body>" +
                    "</html>";

        return page;
    }
    @GetMapping ("/search_customer")
    public String seaarch_customer (@RequestParam("query")String query){
        List<Customer> AllCustomer =customerRepository.getAllCustomer();
        List<Customer> Result = AllCustomer.stream()
                .filter(x ->x.last_name.regionMatches(true,0,query,0,3) || x.first_name.regionMatches(true,0,query,0,3))
                .collect(Collectors.toList());



            String page = "<!DOCTYPE html>\n" +
                            "<html>\n" +
                            "<head>\n" +
                            "<link rel ='stylesheet' href='styles.css'/>"+
                            "<meta charset=\"utf-8\"/>\n" +
                            "</head>\n" +
                            "<body>\n" +
                            "<h1>Найденные посетители</h1>";
                    if (Result.isEmpty()){
                        page+= "<p>Посетители не найдены</p>";
                    }

                    page+=  Result.stream()
                            .map(a -> "<li>    "+a.first_name+"  "+a.last_name+"</li>")
                            .collect(Collectors.joining("<br>"));

                    page+=  "<br>"+
                            "<br><a href='/Composer_listStart'> Вернуться к списку посетителей </a>\n" +
                            "</body>" +
                            "</html>";

        return page;
    }


    @PostMapping ("/next_page")
    public RedirectView next_page (HttpSession session){
        Integer Number=AmountAboutSession.get(session.getId());
        if (Number==null){
            Number=0;
        }
        AmountAboutSession.put(session.getId(),(Number+10));
        return new RedirectView("/Composer_listStart");
    }
    @PostMapping ("/previous_page")
    public RedirectView previous_page (HttpSession session){
        Integer Number=AmountAboutSession.get(session.getId());
        if (Number==null){
            Number=0;
        }
        AmountAboutSession.put(session.getId(),(Number-10));
        return new RedirectView("/Composer_listStart");
    }
    @PostMapping ("/zeroing_page")
    public RedirectView zeroing_page (HttpSession session){
        Integer Number=AmountAboutSession.get(session.getId());
        AmountAboutSession.put(session.getId(),0);
        return new RedirectView("/Composer_listStart");
    }
    @PostMapping ("/selected_page")
    public RedirectView selected_page (@RequestParam("SelectPage")Integer SelectPage,HttpSession session){
        AmountAboutSession.put(session.getId(),(SelectPage*10-10));
        return new RedirectView("/Composer_listStart");
        }
}