Merge pull request '메인 시리즈 탭 - 완결 시리즈' (#269) from test into main

Reviewed-on: #269

src/main/kotlin/kr/co/vividnext/sodalive/content/main/tab/series/AudioContentMainTabSeriesService.kt

@@ -76,21 +76,13 @@ class AudioContentMainTabSeriesService(
         // 새로운 시리즈
         val newSeriesList = recommendSeriesRepository.getNewSeriesList(isAdult = isAdult)
 
-        // 완결 시리즈 월간 랭킹
-        val monthlyRankingStartDate = currentDateTime
-            .withDayOfMonth(1)
-            .withHour(15)
-            .withMinute(0)
-            .withSecond(0)
-            .minusDays(1)
-        val monthlyRankingEndDate = monthlyRankingStartDate
-            .plusMonths(1)
+        val (completedRankStartDate, completedRankEndDate) = calculateStartAndEndDate()
 
         val rankCompleteSeriesList = rankingService.getCompleteSeriesRanking(
             memberId = memberId,
             isAdult = isAdult,
-            startDate = monthlyRankingStartDate,
-            endDate = monthlyRankingEndDate
+            startDate = completedRankStartDate,
+            endDate = completedRankEndDate
         )
 
         val startDate = currentDateTime