룰렛 데이터 읽기 API 추가

src/main/kotlin/kr/co/vividnext/sodalive/live/roulette/GetRouletteResponse.kt

@@ -0,0 +1,6 @@
+package kr.co.vividnext.sodalive.live.roulette
+
+data class GetRouletteResponse(
+    val can: Int,
+    val items: List<RouletteItem>
+)

src/main/kotlin/kr/co/vividnext/sodalive/live/roulette/RouletteController.kt

@@ -5,9 +5,11 @@ import kr.co.vividnext.sodalive.common.SodaException
 import kr.co.vividnext.sodalive.member.Member
 import kr.co.vividnext.sodalive.member.MemberRole
 import org.springframework.security.core.annotation.AuthenticationPrincipal
+import org.springframework.web.bind.annotation.GetMapping
 import org.springframework.web.bind.annotation.PostMapping
 import org.springframework.web.bind.annotation.RequestBody
 import org.springframework.web.bind.annotation.RequestMapping
+import org.springframework.web.bind.annotation.RequestParam
 import org.springframework.web.bind.annotation.RestController
 
 @RestController
@@ -24,4 +26,17 @@ class RouletteController(private val service: RouletteService) {
 
         ApiResponse.ok(service.createOrUpdateRoulette(memberId = member.id!!, request = request))
     }
+
+    @GetMapping
+    fun getRoulette(
+        @RequestParam creatorId: Long,
+        @AuthenticationPrincipal(expression = "#this == 'anonymousUser' ? null : member") member: Member?
+    ): ApiResponse<GetRouletteResponse> {
+        if (member == null) throw SodaException("로그인 정보를 확인해주세요.")
+
+        val response = service.getRoulette(creatorId = creatorId)
+            ?: throw SodaException("룰렛을 사용할 수 없습니다.")
+
+        return ApiResponse.ok(response)
+    }
 }

src/main/kotlin/kr/co/vividnext/sodalive/live/roulette/RouletteService.kt

@@ -36,4 +36,14 @@ class RouletteService(private val repository: RouletteRepository) {
             throw SodaException("옵션 확률의 합이 100%가 아닙니다.")
         }
     }
+
+    fun getRoulette(creatorId: Long): GetRouletteResponse? {
+        val roulette = repository.findByIdOrNull(id = creatorId)
+
+        if (roulette == null || !roulette.isActive || roulette.items.isEmpty()) {
+            return null
+        }
+
+        return GetRouletteResponse(can = roulette.can, items = roulette.items)
+    }
 }