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Step2 - 로또(자동) (#4207)
* feat: 2단계 로또(자동) - 요구사항 추출 및 객체설계 * feat: 2단계 로또(자동) - 요구사항에 맞게 각 객체별 기능 TDD로 구현 시도 * feat: 2단계 로또(자동) - TDD로 작성한 로직 컨트롤러 클래스에서 조립 - 뷰 관련 기능 구현
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‎src/main/java/lottoGame/Application.java‎

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package lottoGame;
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import lottoGame.controller.LottoStore;
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public class Application {
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public static void main(String[] args) {
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new LottoStore().start();
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}
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}

‎src/main/java/lottoGame/controller/LottoStore.java‎

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package lottoGame.controller;
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import static lottoGame.view.Casher.askBeforeWinNums;
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import static lottoGame.view.Casher.askBuyPrice;
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import static lottoGame.view.Casher.informBuyCount;
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import static lottoGame.view.Casher.informPublishedLottos;
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import static lottoGame.view.Casher.informWinningLottoNums;
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import lottoGame.model.lotto.LottoMachine;
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import lottoGame.model.lotto.Lottos;
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import lottoGame.model.price.BuyPrice;
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import lottoGame.model.winner.BeforeWinNums;
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import lottoGame.model.winner.WinnerResult;
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import lottoGame.view.WinResultDto;
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public class LottoStore {
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public static final int PER_LOTTO_PRICE = 1000;
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public void start() {
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BuyPrice buyPrice = getBuyPrice();
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Lottos lottos = buyLottos(buyPrice);
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totalWinResult(
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new BeforeWinNums(askBeforeWinNums()),
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lottos,
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buyPrice.price()
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);
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}
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private Lottos buyLottos(BuyPrice buyPrice) {
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Lottos lottos = publishLottos(buyPrice);
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informPublishedLottos(lottos.convertRawString());
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return lottos;
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}
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private BuyPrice getBuyPrice() {
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BuyPrice buyPrice = new BuyPrice(askBuyPrice());
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informBuyCount(buyPrice.calculateLottoCount(PER_LOTTO_PRICE));
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return buyPrice;
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}
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private Lottos publishLottos(BuyPrice buyPrice) {
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LottoMachine lottoMachine = new LottoMachine(PER_LOTTO_PRICE);
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return lottoMachine.publish(buyPrice);
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}
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private void totalWinResult(BeforeWinNums beforeWinNums, Lottos lottos, int price) {
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WinnerResult winnerResult = lottos.compareAndElectWinResult(beforeWinNums);
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informWinningLottoNums(
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new WinResultDto(
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winnerResult,
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price
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)
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);
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}
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}

‎src/main/java/lottoGame/model/lotto/Lotto.java‎

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package lottoGame.model.lotto;
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import static java.lang.String.join;
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import java.util.Collections;
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import java.util.List;
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import lottoGame.model.winner.BeforeWinNums;
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import lottoGame.model.winner.WinStandard;
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public class Lotto {
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public static final int LOTTO_NUM_COUNT = 6;
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private final List<LottoNum> lottoNums;
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public Lotto(List<LottoNum> lottoNums) {
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if (lottoNums.size() != LOTTO_NUM_COUNT) {
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throw new IllegalArgumentException("로또 갯수가 유효하지 않습니다");
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}
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Collections.sort(lottoNums);
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this.lottoNums = lottoNums;
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}
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public WinStandard checkIfWin(BeforeWinNums beforeWinNums) {
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long result = this.lottoNums.stream()
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.mapToInt(LottoNum::value)
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.filter(beforeWinNums::isContain)
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.count();
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return WinStandard.findByValue(
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Long.valueOf(result).intValue()
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);
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}
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public String toString() {
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return "[" + join(", ", convertString()) + "]";
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}
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private List<String> convertString() {
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return this.lottoNums.stream()
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.map(LottoNum::toString)
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.toList();
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}
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}

‎src/main/java/lottoGame/model/lotto/LottoMachine.java‎

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package lottoGame.model.lotto;
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import static java.util.stream.IntStream.range;
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import static lottoGame.model.lotto.LottoNumFactory.createLotto;
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import java.util.List;
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import lottoGame.model.price.BuyPrice;
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public class LottoMachine {
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public static final int LOTTO_NUM_COUNT = 6;
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private final int perLottoPrice;
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public LottoMachine(int perLottoPrice) {
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this.perLottoPrice = perLottoPrice;
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}
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public Lottos publish(BuyPrice buyPrice) {
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List<Lotto> lottos = range(0, buyPrice.calculateLottoCount(perLottoPrice))
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.mapToObj(idx ->
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new Lotto(
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createLotto(LOTTO_NUM_COUNT)
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)
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).toList();
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return new Lottos(lottos);
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}
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}

‎src/main/java/lottoGame/model/lotto/LottoNum.java‎

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package lottoGame.model.lotto;
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import java.util.Objects;
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public class LottoNum implements Comparable<LottoNum>{
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public static final int MIN_NUM = 1;
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public static final int MAX_NUM = 45;
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private final int num;
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public LottoNum(int num) {
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if (isOutOfLottoRange(num)) {
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throw new IllegalArgumentException("1부터 45사이의 숫자만 입력해주세요.");
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}
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this.num = num;
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}
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private boolean isOutOfLottoRange(int num) {
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return num < MIN_NUM || num > MAX_NUM;
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}
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public int value() {
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return num;
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}
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@Override
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public int compareTo(LottoNum o) {
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return Integer.compare(this.num, o.num);
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}
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public String toString() {
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return String.valueOf(num);
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}
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@Override
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public boolean equals(Object o) {
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if (o == null || getClass() != o.getClass()) {
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return false;
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}
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LottoNum lottoNum = (LottoNum) o;
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return num == lottoNum.num;
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}
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@Override
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public int hashCode() {
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return Objects.hashCode(num);
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}
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}

‎src/main/java/lottoGame/model/lotto/LottoNumFactory.java‎

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package lottoGame.model.lotto;
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import static lottoGame.model.lotto.LottoNum.MAX_NUM;
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import static lottoGame.model.lotto.LottoNum.MIN_NUM;
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import java.util.ArrayList;
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import java.util.HashSet;
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import java.util.List;
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import java.util.Random;
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import java.util.Set;
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public class LottoNumFactory {
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public static LottoNum createLottoNum() {
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return new LottoNum(
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new Random().nextInt(MIN_NUM, MAX_NUM)
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);
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}
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public static List<LottoNum> createLotto(int numCount) {
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if (numCount <= 0) {
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throw new IllegalArgumentException("생성할 로또의 로또번호 갯수를 입력해 주세요.");
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}
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Set<LottoNum> lottoNums = new HashSet<>();
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while (lottoNums.size() < numCount) {
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lottoNums.add(createLottoNum());
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}
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return new ArrayList<>(lottoNums);
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}
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}

‎src/main/java/lottoGame/model/lotto/Lottos.java‎

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package lottoGame.model.lotto;
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import java.util.List;
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import lottoGame.model.winner.BeforeWinNums;
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import lottoGame.model.winner.WinnerResult;
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public class Lottos {
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private final List<Lotto> lottos;
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public Lottos(List<Lotto> lottos) {
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this.lottos = lottos;
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}
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public WinnerResult compareAndElectWinResult(BeforeWinNums beforeWinNums) {
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WinnerResult winnerResult = new WinnerResult();
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for (Lotto lotto : lottos) {
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winnerResult.addWinResult(lotto.checkIfWin(beforeWinNums));
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}
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return winnerResult;
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}
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public int size() {
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return this.lottos.size();
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}
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public List<String> convertRawString() {
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return this.lottos.stream()
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.map(Lotto::toString)
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.toList();
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}
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}

‎src/main/java/lottoGame/model/price/BuyPrice.java‎

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package lottoGame.model.price;
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public class BuyPrice {
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private final int price;
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public BuyPrice(int price) {
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if (price <= 0) {
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throw new IllegalArgumentException("로또가격은 0보다 커야 합니다.");
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}
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this.price = price;
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}
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public int calculateLottoCount(int perLottoPrice) {
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if (perLottoPrice < 0) {
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throw new IllegalArgumentException("잘못된 값입니다.");
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}
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return price / perLottoPrice;
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}
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public int price() {
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return this.price;
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}
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}

‎src/main/java/lottoGame/model/winner/BeforeWinNums.java‎

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package lottoGame.model.winner;
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import java.util.Collections;
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import java.util.List;
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public class BeforeWinNums {
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private final List<Integer> winNums;
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public BeforeWinNums(List<Integer> winNums) {
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this.winNums = winNums;
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}
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public boolean isContain(int num) {
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return winNums.contains(num);
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}
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}

‎src/main/java/lottoGame/model/winner/WinStandard.java‎

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package lottoGame.model.winner;
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import java.util.Arrays;
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public enum WinStandard {
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FIRST("6개 일치 (2000000000원)-", 6, 2000000000),
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SECOND("5개 일치 (1500000원)-", 5, 1500000),
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THIRD("4개 일치 (50000원)-", 4, 50000),
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FOURTH("3개 일치 (5000원)-", 3, 5000),
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NOTHING("x", -1, 0),
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;
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private final String desc;
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private final int value;
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private final int returnOfWin;
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WinStandard(String desc, int value, int returnOfWin) {
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this.desc = desc;
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this.value = value;
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this.returnOfWin = returnOfWin;
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}
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public static WinStandard findByValue(int value) {
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return Arrays.stream(WinStandard.values())
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.filter(winStandard -> winStandard.value == value)
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.findFirst().orElse(NOTHING);
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}
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public boolean isNothing() {
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return this == NOTHING;
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}
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public String desc() {
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return this.desc;
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}
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public int returnOfWin() {
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return this.returnOfWin;
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}
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}

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