feat(chat-character-image): 캐릭터 이미지

- 등록시 블러 이미지를 생성하여 저장하는 기능 추가

src/main/kotlin/kr/co/vividnext/sodalive/admin/chat/character/image/AdminCharacterImageController.kt

@@ -35,7 +35,10 @@ class AdminCharacterImageController(
     private val imageCloudFront: ImageContentCloudFront,
 
     @Value("\${cloud.aws.s3.content-bucket}")
-    private val s3Bucket: String
+    private val s3Bucket: String,
+
+    @Value("\${cloud.aws.s3.bucket}")
+    private val freeBucket: String
 ) {
 
     @GetMapping("/list")
@@ -65,13 +68,19 @@ class AdminCharacterImageController(
         val objectMapper = ObjectMapper()
         val request = objectMapper.readValue(requestString, RegisterCharacterImageRequest::class.java)
 
-        // 1) 임시 경로로 엔티티 생성하기 전에 파일 업로드 경로 계산
-        val tempKey = buildS3Key(characterId = request.characterId)
-        val imagePath = saveImage(tempKey, image)
+        // 업로드 키 생성
+        val s3Key = buildS3Key(characterId = request.characterId)
+
+        // 원본 저장 (content-bucket)
+        val imagePath = saveImageToBucket(s3Key, image, s3Bucket)
+
+        // 블러 생성 및 저장 (무료 이미지 버킷)
+        val blurImagePath = saveBlurImageToBucket(s3Key, image, freeBucket)
 
         imageService.registerImage(
             characterId = request.characterId,
             imagePath = imagePath,
+            blurImagePath = blurImagePath,
             price = request.price,
             isAdult = request.isAdult,
             triggers = request.triggers ?: emptyList()
@@ -108,13 +117,13 @@ class AdminCharacterImageController(
         return "characters/$characterId/images/$fileName"
     }
 
-    private fun saveImage(filePath: String, image: MultipartFile): String {
+    private fun saveImageToBucket(filePath: String, image: MultipartFile, bucket: String): String {
         try {
             val metadata = ObjectMetadata()
             metadata.contentLength = image.size
             return s3Uploader.upload(
                 inputStream = image.inputStream,
-                bucket = s3Bucket,
+                bucket = bucket,
                 filePath = filePath,
                 metadata = metadata
             )
@@ -122,4 +131,36 @@ class AdminCharacterImageController(
             throw SodaException("이미지 저장에 실패했습니다: ${e.message}")
         }
     }
+
+    private fun saveBlurImageToBucket(filePath: String, image: MultipartFile, bucket: String): String {
+        try {
+            // 멀티파트를 BufferedImage로 읽기
+            val bytes = image.bytes
+            val bimg = javax.imageio.ImageIO.read(java.io.ByteArrayInputStream(bytes))
+                ?: throw SodaException("이미지 포맷을 인식할 수 없습니다.")
+            val blurred = kr.co.vividnext.sodalive.utils.ImageBlurUtil.blur(bimg, 12)
+
+            // PNG로 저장(알파 유지), JPEG 업로드가 필요하면 포맷 변경 가능
+            val baos = java.io.ByteArrayOutputStream()
+            val format = when (image.contentType?.lowercase()) {
+                "image/png" -> "png"
+                else -> "jpg"
+            }
+            javax.imageio.ImageIO.write(blurred, format, baos)
+            val inputStream = java.io.ByteArrayInputStream(baos.toByteArray())
+
+            val metadata = ObjectMetadata()
+            metadata.contentLength = baos.size().toLong()
+            metadata.contentType = image.contentType ?: if (format == "png") "image/png" else "image/jpeg"
+
+            return s3Uploader.upload(
+                inputStream = inputStream,
+                bucket = bucket,
+                filePath = filePath,
+                metadata = metadata
+            )
+        } catch (e: Exception) {
+            throw SodaException("블러 이미지 저장에 실패했습니다: ${e.message}")
+        }
+    }
 }