손현수) 자동차 경주 시뮬레이션 기능 추가

docs/README.md

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+<h1>구현할 기능 목록</h1> 
+
+- ### 사용자로부터 자동차 이름 입력받고 유효성 검사하기
+- ### 사용자로부터 시도할 횟수 입력받고 유효성 검사하기
+- ### 시도할 횟수만큼 라운드 반복하기
+- ### 모든 자동차 전진 또는 정지하기
+- ### 자동차의 상태 출력하기
+- ### 최종 우승자 찾기
+- ### 최종 우승자 출력하기

src/main/java/racingcar/Application.java

@@ -1,7 +1,17 @@
 package racingcar;
 
+import racingcar.game.Car;
+import racingcar.game.Game;
+import racingcar.tool.InputUtils;
+
+import java.util.List;
+
 public class Application {
     public static void main(String[] args) {
-        // TODO 구현 진행
+        List<Car> carList = InputUtils.getCarListFromInput();
+        int totalRound = InputUtils.getTotalRoundFromInput();
+        Game game = new Game(carList, totalRound);
+
+        game.start();
     }
 }

src/main/java/racingcar/game/Car.java

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+package racingcar.game;
+
+import camp.nextstep.edu.missionutils.Randoms;
+
+import racingcar.tool.StringValidator;
+
+import java.util.Arrays;
+import java.util.List;
+import java.util.stream.Collectors;
+
+
+public class Car {
+    private final String name;
+    private int position = 0;
+
+    public Car(String name) {
+        this.name = name;
+    }
+
+    public static Car createCar(String carName) {
+        StringValidator.cannotUseCarName(carName);
+
+        return new Car(carName);
+    }
+
+    public int getPosition() {
+        return this.position;
+    }
+
+    public String getName() {
+        return this.name;
+    }
+
+    public String toString() {
+        return String.format("%s : %s",this.name, getMoveString());
+    }
+
+    public void move() {
+        if (Randoms.pickNumberInRange(0, 9) >= 4) {
+            this.position += 1;
+        }
+    }
+
+    private String getMoveString() {
+        List<String> movePositionList = Arrays.stream(new String[this.position])
+                .map(s -> "-")
+                .collect(Collectors.toList());
+
+        return String.join("", movePositionList);
+    }
+}

src/main/java/racingcar/game/Game.java

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+package racingcar.game;
+
+import racingcar.tool.PrintManager;
+
+import java.util.Collections;
+import java.util.List;
+import java.util.stream.Collectors;
+
+public class Game {
+
+    private final List<Car> carList;
+    private final int totalRound;
+
+    public Game(List<Car> carList, int totalRound) {
+        this.carList = carList;
+        this.totalRound = totalRound;
+    }
+
+    public void start() {
+        Round round = new Round(carList);
+
+        PrintManager.printGameResultHead();
+        while (round.getCurrentRound() <= totalRound) {
+            round.play();
+        }
+
+        List<Car> winnerList = findWinners();
+        PrintManager.printWinnersName(winnerList);
+    }
+
+    private List<Car> findWinners() {
+        if (carList.size() == 0) {
+            return Collections.emptyList();
+        }
+
+        int maxPosition = carList.stream()
+                .map(Car::getPosition)
+                .max(Integer::compareTo)
+                .get();
+
+        return carList.stream()
+                .filter(car -> car.getPosition() == maxPosition)
+                .collect(Collectors.toList());
+    }
+}

src/main/java/racingcar/game/Round.java

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+package racingcar.game;
+
+import racingcar.tool.PrintManager;
+
+import java.util.List;
+
+public class Round {
+    private int currentRound;
+    private final List<Car> carList;
+
+    public Round(List<Car> carList) {
+        this.currentRound = 1;
+        this.carList = carList;
+    }
+
+    public int getCurrentRound() {
+        return this.currentRound;
+    }
+
+    public void play() {
+        moveAllCars();
+        PrintManager.printAllCarsStatus(carList);
+        this.currentRound += 1;
+    }
+
+    private void moveAllCars() {
+        carList.forEach(Car::move);
+    }
+
+}

src/main/java/racingcar/tool/InputUtils.java

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+package racingcar.tool;
+
+import camp.nextstep.edu.missionutils.Console;
+
+import racingcar.game.Car;
+
+import java.util.List;
+
+public class InputUtils {
+
+    public static List<Car> getCarListFromInput() {
+        while (true) {
+            PrintManager.printCarNameInputDescription();
+
+            //for to split last comma, ' ' is going to be removed by trim func.
+            String carNames = Console.readLine() + ' ';
+            try {
+                return StringConvertor.convertIntoCarList(carNames);
+            } catch (IllegalArgumentException exception) {
+                PrintManager.printErrorMessage(exception.getMessage());
+            }
+        }
+    }
+
+    public static int getTotalRoundFromInput() {
+        while (true) {
+            PrintManager.printTotalRoundInputDescription();
+
+            String roundInput = Console.readLine();
+            try {
+                return StringConvertor.convertIntoNaturalNumber(roundInput);
+            } catch (IllegalArgumentException exception) {
+                PrintManager.printErrorMessage(exception.getMessage());
+            }
+        }
+    }
+
+}

src/main/java/racingcar/tool/PrintManager.java

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+package racingcar.tool;
+
+import racingcar.game.Car;
+
+import java.util.List;
+import java.util.stream.Collectors;
+
+public class PrintManager {
+
+    public static void printCarNameInputDescription() {
+        System.out.println("경주할 자동차 이름을 입력하세요.(이름은 쉼표(,) 기준으로 구분)");
+    }
+
+    public static void printTotalRoundInputDescription() {
+        System.out.println("시도할 회수는 몇회인가요?");
+    }
+
+    public static void printAllCarsStatus(List<Car> carList) {
+        carList.forEach(System.out::println);
+        System.out.println();
+    }
+
+    public static void printWinnersName(List<Car> carList) {
+        String winnersName = getWinnersString(carList);
+
+        System.out.printf("최종 우승자 : %s", winnersName);
+    }
+
+    private static String getWinnersString(List<Car> carList) {
+        List<String> winnerNameList = carList.stream()
+                .map(Car::getName)
+                .collect(Collectors.toList());
+
+        return String.join(", ", winnerNameList);
+    }
+
+    public static void printGameResultHead() {
+        System.out.println("\n실행 결과");
+    }
+
+    public static void printErrorMessage(String message) {
+        System.out.printf("[ERROR] %s\n", message);
+    }
+}

src/main/java/racingcar/tool/StringConvertor.java

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+package racingcar.tool;
+
+import racingcar.game.Car;
+
+import java.util.Arrays;
+import java.util.List;
+import java.util.stream.Collectors;
+
+public class StringConvertor {
+
+    public static List<Car> convertIntoCarList(String carNames) throws IllegalArgumentException {
+        return Arrays.stream(carNames.split(","))
+                .map(String::trim)
+                .map(Car::createCar)
+                .collect(Collectors.toList());
+    }
+
+    public static Integer convertIntoNaturalNumber(String targetString) throws IllegalArgumentException {
+        try {
+            int number = Integer.parseInt(targetString);
+
+            if (number < 1) {
+                throw new NumberFormatException();
+            }
+
+            return number;
+        } catch (NumberFormatException exception) {
+            throw new IllegalArgumentException("자연수가 아닌 값은 입력할 수 없습니다.");
+        }
+    }
+}

src/main/java/racingcar/tool/StringValidator.java

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+package racingcar.tool;
+
+public class StringValidator {
+
+
+    public static void cannotUseCarName(String carName) throws IllegalArgumentException {
+        if (carName.length() == 0) {
+            throw new IllegalArgumentException("자동차 이름은 공백일 수 없습니다.");
+        } else if (carName.length() > 5) {
+            throw new IllegalArgumentException("자동차 이름은 최대 5자리입니다. 불가능한 이름: " + carName);
+        }
+    }
+}