From 80c44373c744aa58eaa9fef97a9255595b096877 Mon Sep 17 00:00:00 2001
From: Klaus <klaus@vividnext.co.kr>
Date: Tue, 11 Nov 2025 14:46:36 +0900
Subject: [PATCH] =?UTF-8?q?refactor(home):=20=EC=B6=94=EC=B2=9C=20dedup=20?=
 =?UTF-8?q?=EC=9E=90=EB=A3=8C=EA=B5=AC=EC=A1=B0=EB=A5=BC=20LinkedHashMap?=
 =?UTF-8?q?=EC=97=90=EC=84=9C=20Set+List=EB=A1=9C=20=EA=B5=90=EC=B2=B4?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 .../vividnext/sodalive/api/home/HomeService.kt  | 17 ++++++++++-------
 1 file changed, 10 insertions(+), 7 deletions(-)

diff --git a/src/main/kotlin/kr/co/vividnext/sodalive/api/home/HomeService.kt b/src/main/kotlin/kr/co/vividnext/sodalive/api/home/HomeService.kt
index 7501745..7283f5c 100644
--- a/src/main/kotlin/kr/co/vividnext/sodalive/api/home/HomeService.kt
+++ b/src/main/kotlin/kr/co/vividnext/sodalive/api/home/HomeService.kt
@@ -304,14 +304,17 @@ class HomeService(
         val memberId = member?.id
         val isAdult = member?.auth != null && isAdultContentVisible
 
-        // 최대 3회까지 동일 로직으로 추가 조회하며, 중복을 제거하고 20개가 되면 조기 반환한다.
-        val unique = LinkedHashMap<Long, AudioContentMainItem>() // contentId 기준 중복 제거 + 순서 보존
+        // Set + List 조합으로 중복 제거 및 순서 보존, 각 시도마다 limit=60으로 조회
+        val seen = HashSet<Long>(RECOMMEND_TARGET_SIZE * 2)
+        val result = ArrayList<AudioContentMainItem>(RECOMMEND_TARGET_SIZE)
         var attempt = 0
-        while (attempt < RECOMMEND_MAX_ATTEMPTS && unique.size < RECOMMEND_TARGET_SIZE) {
+        while (attempt < RECOMMEND_MAX_ATTEMPTS && result.size < RECOMMEND_TARGET_SIZE) {
             attempt += 1
             val batch = contentService.getLatestContentByTheme(
                 theme = emptyList(), // 특정 테마에 종속되지 않도록 전체에서 랜덤 조회
                 contentType = contentType,
+                offset = 0,
+                limit = (RECOMMEND_TARGET_SIZE * RECOMMEND_MAX_ATTEMPTS).toLong(), // 60개 조회
                 isFree = false,
                 isAdult = isAdult,
                 orderByRandom = true
@@ -324,13 +327,13 @@ class HomeService(
             }
 
             for (item in batch) {
-                if (unique.size >= RECOMMEND_TARGET_SIZE) break
-                if (!unique.containsKey(item.contentId)) {
-                    unique[item.contentId] = item
+                if (result.size >= RECOMMEND_TARGET_SIZE) break
+                if (seen.add(item.contentId)) {
+                    result.add(item)
                 }
             }
         }
 
-        return unique.values.take(RECOMMEND_TARGET_SIZE)
+        return result
     }
 }