From afc00cf7fa51b48585905ab4b5b2ca43550e09ea Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=EA=B9=80=EC=97=B0=EC=A7=84?= <love_homebody@naver.com>
Date: Fri, 8 Sep 2023 17:36:41 +0900
Subject: [PATCH] =?UTF-8?q?feat(Cars):=20=EC=9A=B0=EC=8A=B9=EC=9E=90=20?=
 =?UTF-8?q?=EA=B3=84=EC=82=B0?=
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---
 src/main/java/racingcar/domain/Car.java  | 12 ++++++++++++
 src/main/java/racingcar/domain/Cars.java | 19 +++++++++++++++++++
 2 files changed, 31 insertions(+)

diff --git a/src/main/java/racingcar/domain/Car.java b/src/main/java/racingcar/domain/Car.java
index 4f2106730..0b3cf1799 100644
--- a/src/main/java/racingcar/domain/Car.java
+++ b/src/main/java/racingcar/domain/Car.java
@@ -15,7 +15,19 @@ public void race() {
         position.move();
     }
 
+    public boolean isWinner(int maxPosition) {
+        return position.isSame(maxPosition);
+    }
+
     public String getRacingResult() {
         return String.format(OutputMessage.RACING_RESULT.toString(), name.getValue(), position.getValue());
     }
+
+    public Position getPosition() {
+        return position;
+    }
+
+    public Name getName() {
+        return name;
+    }
 }
diff --git a/src/main/java/racingcar/domain/Cars.java b/src/main/java/racingcar/domain/Cars.java
index d79d3f9bd..2975100ed 100644
--- a/src/main/java/racingcar/domain/Cars.java
+++ b/src/main/java/racingcar/domain/Cars.java
@@ -1,7 +1,9 @@
 package racingcar.domain;
 
 import java.util.ArrayList;
+import java.util.Collections;
 import java.util.List;
+import java.util.stream.Collectors;
 
 public class Cars {
 
@@ -23,4 +25,21 @@ public String getRacingResult() {
         );
         return stringBuilder.toString();
     }
+
+    public List<Name> getWinner() {
+        int maxPosition = calculateMaxPosition();
+        return cars.stream()
+                .filter(car -> car.isWinner(maxPosition))
+                .map(Car::getName)
+                .collect(Collectors.toList());
+    }
+
+    public int calculateMaxPosition() {
+        List<Integer> positions = cars.stream()
+                .map(Car::getPosition)
+                .mapToInt(Position::getPosition)
+                .boxed()
+                .collect(Collectors.toList());
+        return Collections.max(positions);
+    }
 }