From 25f0c11a25a8124b43d95fddc68d56ada3f079c9 Mon Sep 17 00:00:00 2001
From: jinny-l <jinny.l.dev@gmail.com>
Date: Wed, 30 Aug 2023 20:54:35 +0900
Subject: [PATCH] =?UTF-8?q?=E2=9C=A8feat:=208=EC=9B=94=2030=EC=9D=BC=20?=
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---
 ...\354\261\204\355\214\205\353\260\251.java" | 55 +++++++++++++++++++
 1 file changed, 55 insertions(+)
 create mode 100644 "jinny-l/season2/_230830/PGS_\354\230\244\355\224\210\354\261\204\355\214\205\353\260\251.java"

diff --git "a/jinny-l/season2/_230830/PGS_\354\230\244\355\224\210\354\261\204\355\214\205\353\260\251.java" "b/jinny-l/season2/_230830/PGS_\354\230\244\355\224\210\354\261\204\355\214\205\353\260\251.java"
new file mode 100644
index 0000000..cda302b
--- /dev/null
+++ "b/jinny-l/season2/_230830/PGS_\354\230\244\355\224\210\354\261\204\355\214\205\353\260\251.java"
@@ -0,0 +1,55 @@
+package season2._230830;
+
+import java.util.ArrayList;
+import java.util.LinkedHashMap;
+import java.util.List;
+import java.util.Map;
+
+public class PGS_오픈채팅방 {
+
+    public static String[] solution(String[] record) {
+        List<String> answer = new ArrayList<>();
+        List<String> actionLog = new ArrayList<>();
+        List<String> userLog = new ArrayList<>();
+        Map<String, String> users = new LinkedHashMap<>();
+
+        for (String s : record) {
+            // record 파싱
+            String[] tmp = s.split(" ");
+            String action = tmp[0];
+            String userId = tmp[1];
+
+            // 로그 저장
+            actionLog.add(action);
+            userLog.add(userId);
+
+            // 변경되는 유저 정보 저장
+            if (action.equals("Change") || action.equals("Enter")) {
+                String name = tmp[2];
+                users.put(userId, name);
+            }
+        }
+
+        // 로그를 기록으로 변환
+        for (int i = 0; i < actionLog.size(); i++) {
+            String action = actionLog.get(i);
+            String userId = userLog.get(i);
+            String name = users.get(userId);
+            String log = generateLog(action, name);
+            if (log != null) {
+                answer.add(log);
+            }
+        }
+        return answer.toArray(new String[]{});
+    }
+
+    private static String generateLog(String action, String name) {
+        if (action.equals("Enter")) {
+            return String.format("%s님이 들어왔습니다.", name);
+        }
+        if (action.equals("Leave")) {
+            return String.format("%s님이 나갔습니다.", name);
+        }
+        return null;
+    }
+}