From d1fb87556e4792b9f742b6d30900fa8ce7893797 Mon Sep 17 00:00:00 2001
From: Klaus <klaus@vividnext.co.kr>
Date: Fri, 19 Jun 2026 16:32:16 +0900
Subject: [PATCH] =?UTF-8?q?refactor(cdn):=20CDN=20URL=20=EB=B3=80=ED=99=98?=
 =?UTF-8?q?=20=ED=95=A8=EC=88=98=EB=A5=BC=20=EA=B3=B5=ED=86=B5=ED=99=94?=
 =?UTF-8?q?=ED=95=9C=EB=8B=A4?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 .../v2/common/domain/CdnUrlExtensions.kt      |  7 ++++
 .../v2/common/domain/CdnUrlExtensionsTest.kt  | 39 +++++++++++++++++++
 2 files changed, 46 insertions(+)
 create mode 100644 src/main/kotlin/kr/co/vividnext/sodalive/v2/common/domain/CdnUrlExtensions.kt
 create mode 100644 src/test/kotlin/kr/co/vividnext/sodalive/v2/common/domain/CdnUrlExtensionsTest.kt

diff --git a/src/main/kotlin/kr/co/vividnext/sodalive/v2/common/domain/CdnUrlExtensions.kt b/src/main/kotlin/kr/co/vividnext/sodalive/v2/common/domain/CdnUrlExtensions.kt
new file mode 100644
index 00000000..f2ffe04c
--- /dev/null
+++ b/src/main/kotlin/kr/co/vividnext/sodalive/v2/common/domain/CdnUrlExtensions.kt
@@ -0,0 +1,7 @@
+package kr.co.vividnext.sodalive.v2.common.domain
+
+fun String?.toCdnUrl(cloudFrontHost: String): String? {
+    if (isNullOrBlank()) return null
+    if (startsWith("https://") || startsWith("http://")) return this
+    return "$cloudFrontHost/$this"
+}
diff --git a/src/test/kotlin/kr/co/vividnext/sodalive/v2/common/domain/CdnUrlExtensionsTest.kt b/src/test/kotlin/kr/co/vividnext/sodalive/v2/common/domain/CdnUrlExtensionsTest.kt
new file mode 100644
index 00000000..fccd7e08
--- /dev/null
+++ b/src/test/kotlin/kr/co/vividnext/sodalive/v2/common/domain/CdnUrlExtensionsTest.kt
@@ -0,0 +1,39 @@
+package kr.co.vividnext.sodalive.v2.common.domain
+
+import org.junit.jupiter.api.Assertions.assertEquals
+import org.junit.jupiter.api.DisplayName
+import org.junit.jupiter.api.Test
+
+class CdnUrlExtensionsTest {
+    private val cloudFrontHost = "https://cdn.test"
+
+    @Test
+    @DisplayName("CDN URL 변환은 null과 blank를 null로 반환한다")
+    fun shouldReturnNullForNullOrBlankPath() {
+        assertEquals(null, null.toCdnUrl(cloudFrontHost))
+        assertEquals(null, "".toCdnUrl(cloudFrontHost))
+        assertEquals(null, " ".toCdnUrl(cloudFrontHost))
+    }
+
+    @Test
+    @DisplayName("CDN URL 변환은 절대 URL을 그대로 반환한다")
+    fun shouldKeepAbsoluteUrl() {
+        assertEquals(
+            "https://image.test/profile.png",
+            "https://image.test/profile.png".toCdnUrl(cloudFrontHost)
+        )
+        assertEquals(
+            "http://image.test/profile.png",
+            "http://image.test/profile.png".toCdnUrl(cloudFrontHost)
+        )
+    }
+
+    @Test
+    @DisplayName("CDN URL 변환은 상대 path 앞에 CloudFront host를 붙인다")
+    fun shouldPrependCloudFrontHostToRelativePath() {
+        assertEquals(
+            "https://cdn.test/profile/default-profile.png",
+            "profile/default-profile.png".toCdnUrl(cloudFrontHost)
+        )
+    }
+}