From 63a7c28e9685b9e7dc616ccce13dd9df2543a5da Mon Sep 17 00:00:00 2001
From: klaus <klaus@vividnext.co.kr>
Date: Fri, 10 Jul 2026 10:16:01 +0900
Subject: [PATCH] =?UTF-8?q?feat(ranking):=20=EB=B0=98=EC=9D=91=ED=98=95=20?=
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---
 .../widget/ranking/RankingResponsiveScale.kt  | 17 +++++++++++++
 .../ranking/RankingResponsiveScaleTest.kt     | 25 +++++++++++++++++++
 2 files changed, 42 insertions(+)
 create mode 100644 app/src/main/java/kr/co/vividnext/sodalive/v2/widget/ranking/RankingResponsiveScale.kt
 create mode 100644 app/src/test/java/kr/co/vividnext/sodalive/v2/widget/ranking/RankingResponsiveScaleTest.kt

diff --git a/app/src/main/java/kr/co/vividnext/sodalive/v2/widget/ranking/RankingResponsiveScale.kt b/app/src/main/java/kr/co/vividnext/sodalive/v2/widget/ranking/RankingResponsiveScale.kt
new file mode 100644
index 00000000..5307f1ef
--- /dev/null
+++ b/app/src/main/java/kr/co/vividnext/sodalive/v2/widget/ranking/RankingResponsiveScale.kt
@@ -0,0 +1,17 @@
+package kr.co.vividnext.sodalive.v2.widget.ranking
+
+import android.content.res.Resources
+
+object RankingResponsiveScale {
+    private const val BASE_WIDTH_DP = 402
+
+    fun fromResources(resources: Resources): Float = fromScreenWidthDp(resources.configuration.screenWidthDp)
+
+    fun fromScreenWidthDp(screenWidthDp: Int): Float {
+        return when {
+            screenWidthDp <= 0 -> 1f
+            screenWidthDp >= BASE_WIDTH_DP -> 1f
+            else -> screenWidthDp / BASE_WIDTH_DP.toFloat()
+        }
+    }
+}
diff --git a/app/src/test/java/kr/co/vividnext/sodalive/v2/widget/ranking/RankingResponsiveScaleTest.kt b/app/src/test/java/kr/co/vividnext/sodalive/v2/widget/ranking/RankingResponsiveScaleTest.kt
new file mode 100644
index 00000000..bcba3d8b
--- /dev/null
+++ b/app/src/test/java/kr/co/vividnext/sodalive/v2/widget/ranking/RankingResponsiveScaleTest.kt
@@ -0,0 +1,25 @@
+package kr.co.vividnext.sodalive.v2.widget.ranking
+
+import org.junit.Assert.assertEquals
+import org.junit.Test
+
+class RankingResponsiveScaleTest {
+
+    @Test
+    fun `402dp 이상이면 scale 1을 반환한다`() {
+        assertEquals(1f, RankingResponsiveScale.fromScreenWidthDp(402), 0.0001f)
+        assertEquals(1f, RankingResponsiveScale.fromScreenWidthDp(430), 0.0001f)
+    }
+
+    @Test
+    fun `402dp 미만이면 device width와 기준 폭 비율을 반환한다`() {
+        assertEquals(360f / 402f, RankingResponsiveScale.fromScreenWidthDp(360), 0.0001f)
+        assertEquals(401f / 402f, RankingResponsiveScale.fromScreenWidthDp(401), 0.0001f)
+    }
+
+    @Test
+    fun `screen width를 확인할 수 없으면 scale 1을 반환한다`() {
+        assertEquals(1f, RankingResponsiveScale.fromScreenWidthDp(0), 0.0001f)
+        assertEquals(1f, RankingResponsiveScale.fromScreenWidthDp(-1), 0.0001f)
+    }
+}