BestSellerService

package bookstore.scraper.book.scrapingtypes;

import bookstore.scraper.Bookstore;
import bookstore.scraper.book.Book;
import bookstore.scraper.empik.EmpikFetchingBookService;
import bookstore.scraper.merlin.MerlinFetchingBookService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Service;

import java.io.IOException;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import static bookstore.scraper.JSoupConnector.connect;

@Service
public class BestSellersService {

    @Value("${external.library.url.empik.bestsellers}")
    private String bestSellersEmpikURL;
    @Value("${external.library.url.merlin.bestsellers}")
    private String bestSellersMerlinURL;


    private final EmpikFetchingBookService empikBookService;

    private final MerlinFetchingBookService merlinBookService;

    @Autowired
    public BestSellersService(EmpikFetchingBookService empikBookService, MerlinFetchingBookService merlinBookService) {
        this.empikBookService = empikBookService;
        this.merlinBookService = merlinBookService;
    }

    public Map<Bookstore, List<Book>> getBestSellers() throws IOException {
        Map<Bookstore, List<Book>> bookstoreWithBestSellers = new HashMap<>();

        bookstoreWithBestSellers.put(Bookstore.EMPIK, empikBookService
                .get5BestSellersEmpik(connect(bestSellersEmpikURL)));
        bookstoreWithBestSellers.put(Bookstore.MERLIN, merlinBookService
                .get5BestSellersMerlin(connect(bestSellersMerlinURL)));

        return bookstoreWithBestSellers;
    }
}

BookController

package bookstore.scraper.controller;

import bookstore.scraper.Bookstore;
import bookstore.scraper.book.Book;
import bookstore.scraper.book.scrapingtypes.BestSellersService;
import bookstore.scraper.book.scrapingtypes.CategorizedBookService;
import bookstore.scraper.book.scrapingtypes.MostPreciseBookService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RestController;

import java.util.List;
import java.util.Map;

@RestController
public class BookController {

    private final MostPreciseBookService mostPreciseBookService;
    private final CategorizedBookService categorizedBookService;
    private final BestSellersService bestSellersService;

    @Autowired
    public BookController(MostPreciseBookService bookOperationsService, CategorizedBookService categorizedBookService, BestSellersService bestSellersService) {
        this.mostPreciseBookService = bookOperationsService;
        this.categorizedBookService = categorizedBookService;
        this.bestSellersService = bestSellersService;
    }

    @GetMapping("/book/{title}")
    public Map<Bookstore, Book> getBookByTitle(@PathVariable String title) {
        return mostPreciseBookService.getBookByTitle(title);
    }

    @GetMapping("/romances")
    public Map<Bookstore, List<Book>> get15RomanticBooks() {
        return categorizedBookService.get15BooksFromRomanceCategory();
    }

    @GetMapping("/biographies")
    public Map<Bookstore, List<Book>> get15BiographiesBooks() {
        return categorizedBookService.get15BooksFromBiographiesCategory();
    }

    @GetMapping("/guides")
    public Map<Bookstore, List<Book>> get15GuidesBooks() {
        return categorizedBookService.get15BooksFromGuidesCategory();
    }

    @GetMapping("/fantasy")
    public Map<Bookstore, List<Book>> get15FantasyBooks() {
        return categorizedBookService.get15BooksFromFantasyCategory();
    }

    @GetMapping("/crime")
    public Map<Bookstore, List<Book>> get15CrimeBooks() {
        return categorizedBookService.get15BooksFromCrimeCategory();
    }
}

MostPreciseBookService

package bookstore.scraper.book.scrapingtypes;

import bookstore.scraper.Bookstore;
import bookstore.scraper.book.Book;
import bookstore.scraper.empik.EmpikFetchingBookService;
import bookstore.scraper.merlin.MerlinFetchingBookService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Service;

import java.util.HashMap;
import java.util.Map;

import static bookstore.scraper.JSoupConnector.connect;

@Service
@Slf4j
public class MostPreciseBookService {

    private final EmpikFetchingBookService empikBookService;
    private final MerlinFetchingBookService merlinBookService;

    @Value("${external.library.url.empik.most.precise.book}")
    private String mostPreciseBookEmpikURL;

    @Value("${external.library.url.merlin.most.precise.book}")
    private String mostPreciseBookMerlinURL;


    @Autowired
    public MostPreciseBookService(EmpikFetchingBookService empikBookService, MerlinFetchingBookService merlinBookService) {
        this.empikBookService = empikBookService;
        this.merlinBookService = merlinBookService;
    }

    public Map<Bookstore, Book> getBookByTitle(String title) {
        Map<Bookstore, Book> bookstoreWithMostPreciseBook = new HashMap<>();

        bookstoreWithMostPreciseBook.put(Bookstore.MERLIN,
                merlinBookService.getMostPreciseMerlinBook(
                        connect(concatURLWithTitle(mostPreciseBookEmpikURL, title))));

        bookstoreWithMostPreciseBook.put(Bookstore.EMPIK,
                empikBookService.getMostPreciseEmpikBook(
                        connect(concatURLWithTitle(mostPreciseBookMerlinURL, title))));

        return bookstoreWithMostPreciseBook;
    }

    private String concatURLWithTitle(String URL, String title) {
        return String.format(URL, title);
    }
}