fix: get sandwich loggic AI -> Algorithm

noweekend-clients/client-mcp/src/main/kotlin/noweekend/client/mcp/recommend/RecommendApi.kt

@@ -2,8 +2,6 @@ package noweekend.client.mcp.recommend
 
 import noweekend.client.mcp.recommend.model.AiGenerateVacationRequest
 import noweekend.client.mcp.recommend.model.AiGenerateVacationResponse
-import noweekend.client.mcp.recommend.model.BridgeVacationPeriod
-import noweekend.client.mcp.recommend.model.SandwichRequest
 import noweekend.client.mcp.recommend.model.TagRequest
 import noweekend.client.mcp.recommend.model.WeatherRequest
 import noweekend.core.domain.tag.TagRecommendation
@@ -40,13 +38,6 @@ interface RecommendApi {
     )
     fun getTagOnlyNew(@RequestBody request: TagRequest): List<TagRecommendation>
 
-    @RequestMapping(
-        value = ["/getSandwich"],
-        consumes = [MediaType.APPLICATION_JSON_VALUE],
-        method = [RequestMethod.POST],
-    )
-    fun getSandwich(@RequestBody request: SandwichRequest): List<BridgeVacationPeriod>
-
     @RequestMapping(
         value = ["/generate-vacation"],
         consumes = [MediaType.APPLICATION_JSON_VALUE],

noweekend-clients/client-mcp/src/main/kotlin/noweekend/client/mcp/recommend/RecommendClient.kt

@@ -1,11 +1,8 @@
 package noweekend.client.mcp.recommend
 
 import feign.FeignException
-import noweekend.client.mcp.McpNotRespondingException
 import noweekend.client.mcp.recommend.model.AiGenerateVacationRequest
 import noweekend.client.mcp.recommend.model.AiGenerateVacationResponse
-import noweekend.client.mcp.recommend.model.BridgeVacationPeriod
-import noweekend.client.mcp.recommend.model.SandwichRequest
 import noweekend.client.mcp.recommend.model.TagRequest
 import noweekend.client.mcp.recommend.model.WeatherRequest
 import noweekend.client.mcp.recommend.model.toRequestType
@@ -82,18 +79,6 @@ class RecommendClient(
         )
     }
 
-    fun getSandwich(request: SandwichRequest): List<BridgeVacationPeriod> {
-        return try {
-            api.getSandwich(request)
-        } catch (e: FeignException) {
-            log.warn("[getSandwich] FeignException occurred. msg=${e.message}")
-            throw McpNotRespondingException()
-        } catch (e: Exception) {
-            log.error("[getSandwich] Unexpected exception occurred.", e)
-            throw McpNotRespondingException()
-        }
-    }
-
     fun generateVacation(request: AiGenerateVacationRequest): AiGenerateVacationResponse? {
         return try {
             api.generateVacation(request)

noweekend-core/core-api/src/main/kotlin/noweekend/core/api/controller/TempController.kt

@@ -6,6 +6,7 @@ import io.swagger.v3.oas.annotations.media.Schema
 import io.swagger.v3.oas.annotations.tags.Tag
 import noweekend.core.domain.auth.TestUserService
 import noweekend.core.domain.auth.UserWithToken
+import noweekend.core.domain.recommend.RecommendService
 import noweekend.core.support.response.ApiResponse
 import org.springframework.web.bind.annotation.GetMapping
 import org.springframework.web.bind.annotation.RestController
@@ -15,6 +16,7 @@ import io.swagger.v3.oas.annotations.responses.ApiResponse as SwaggerApiResponse
 @RestController
 class TempController(
     private val testUserService: TestUserService,
+    private val recommendService: RecommendService,
 ) {
 
     @Operation(

noweekend-core/core-api/src/main/kotlin/noweekend/core/api/controller/v1/RecommendController.kt

@@ -1,10 +1,9 @@
 package noweekend.core.api.controller.v1
 
-import noweekend.client.mcp.recommend.model.SandwichApiResponse
-import noweekend.client.mcp.recommend.model.SandwichResponse
 import noweekend.core.api.controller.v1.docs.RecommendControllerDocs
 import noweekend.core.api.controller.v1.request.GenerateVacationRequest
 import noweekend.core.api.controller.v1.response.AiGenerateVacationApiResponse
+import noweekend.core.api.controller.v1.response.SandwichApiResponse
 import noweekend.core.api.controller.v1.response.WeatherResponse
 import noweekend.core.api.security.annotations.CurrentUserId
 import noweekend.core.domain.IconStyle
@@ -16,7 +15,6 @@ 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.RestController
-import java.time.LocalDate
 
 @RestController
 @RequestMapping("/api/v1/recommend")
@@ -50,27 +48,9 @@ class RecommendController(
     }
 
     @GetMapping("/sandwich")
-    override fun getSandwich(
-        @CurrentUserId userId: String,
-    ): ApiResponse<SandwichApiResponse> {
-//            return ApiResponse.success(recommendService.getSandwich(userId))
-        val mockResponse = SandwichApiResponse(
-            responses = listOf(
-                SandwichResponse(
-                    startDate = LocalDate.of(2025, 8, 14),
-                    endDate = LocalDate.of(2025, 8, 16),
-                    useAnnualLeave = 1,
-                    totalVacationDays = 3,
-                ),
-                SandwichResponse(
-                    startDate = LocalDate.of(2025, 9, 11),
-                    endDate = LocalDate.of(2025, 9, 15),
-                    useAnnualLeave = 2,
-                    totalVacationDays = 5,
-                ),
-            ),
-        )
-        return ApiResponse.success(mockResponse)
+    override fun getSandwich(): ApiResponse<SandwichApiResponse> {
+        val sandwichApiResponse = recommendService.getSandwich()
+        return ApiResponse.success(sandwichApiResponse)
     }
 
     @PostMapping("/generate-vacation")

noweekend-core/core-api/src/main/kotlin/noweekend/core/api/controller/v1/docs/RecommendControllerDocs.kt

@@ -6,9 +6,9 @@ import io.swagger.v3.oas.annotations.media.Content
 import io.swagger.v3.oas.annotations.media.ExampleObject
 import io.swagger.v3.oas.annotations.media.Schema
 import io.swagger.v3.oas.annotations.tags.Tag
-import noweekend.client.mcp.recommend.model.SandwichApiResponse
 import noweekend.core.api.controller.v1.request.GenerateVacationRequest
 import noweekend.core.api.controller.v1.response.AiGenerateVacationApiResponse
+import noweekend.core.api.controller.v1.response.SandwichApiResponse
 import noweekend.core.api.controller.v1.response.WeatherResponse
 import noweekend.core.api.security.annotations.CurrentUserId
 import noweekend.core.domain.tag.TagRecommendations
@@ -320,9 +320,7 @@ interface RecommendControllerDocs {
             ),
         ],
     )
-    fun getSandwich(
-        @Parameter(hidden = true) @CurrentUserId userId: String,
-    ): ApiResponse<SandwichApiResponse>
+    fun getSandwich(): ApiResponse<SandwichApiResponse>
 
     @Operation(
         summary = "AI 기반 여행 일정 생성",

noweekend-core/core-api/src/main/kotlin/noweekend/core/api/controller/v1/response/SandwichResponse.kt

@@ -0,0 +1,14 @@
+package noweekend.core.api.controller.v1.response
+
+import java.time.LocalDate
+
+data class SandwichResponse(
+    val startDate: LocalDate,
+    val endDate: LocalDate,
+    val useAnnualLeave: Int,
+    val totalVacationDays: Int,
+)
+
+data class SandwichApiResponse(
+    val responses: List<SandwichResponse>,
+)

noweekend-core/core-api/src/main/kotlin/noweekend/core/domain/recommend/RecommendService.kt

@@ -1,15 +1,15 @@
 package noweekend.core.domain.recommend
 
-import noweekend.client.mcp.recommend.model.SandwichApiResponse
 import noweekend.core.api.controller.v1.request.GenerateVacationRequest
 import noweekend.core.api.controller.v1.response.AiGenerateVacationApiResponse
+import noweekend.core.api.controller.v1.response.SandwichApiResponse
 import noweekend.core.api.controller.v1.response.WeatherResponse
 import noweekend.core.domain.tag.TagRecommendations
 
 interface RecommendService {
     fun getWeatherRecommend(userId: String): WeatherResponse
     fun getTagRecommend(userId: String): TagRecommendations
     fun getTagRecommendOnlyNew(userId: String): TagRecommendations
-    fun getSandwich(userId: String): SandwichApiResponse
+    fun getSandwich(): SandwichApiResponse
     fun generateVacation(userId: String, request: GenerateVacationRequest): AiGenerateVacationApiResponse
 }

noweekend-core/core-api/src/main/kotlin/noweekend/core/domain/recommend/RecommendServiceImpl.kt

@@ -1,22 +1,20 @@
 package noweekend.core.domain.recommend
 
-import noweekend.client.mcp.McpNotRespondingException
 import noweekend.client.mcp.recommend.RecommendClient
 import noweekend.client.mcp.recommend.model.AiGenerateVacationRequest
-import noweekend.client.mcp.recommend.model.SandwichApiResponse
-import noweekend.client.mcp.recommend.model.SandwichRequest
-import noweekend.client.mcp.recommend.model.SandwichResponse
 import noweekend.client.mcp.recommend.model.WeatherRequest
 import noweekend.core.api.controller.v1.request.GenerateVacationRequest
 import noweekend.core.api.controller.v1.response.AiGenerateVacationApiResponse
+import noweekend.core.api.controller.v1.response.SandwichApiResponse
+import noweekend.core.api.controller.v1.response.SandwichResponse
 import noweekend.core.api.controller.v1.response.WeatherResponse
 import noweekend.core.domain.ActivityType
 import noweekend.core.domain.IconStyle
 import noweekend.core.domain.LeisurePreference
 import noweekend.core.domain.RestPreference
 import noweekend.core.domain.TravelStyle
-import noweekend.core.domain.holiday.Holiday
 import noweekend.core.domain.holiday.HolidayReader
+import noweekend.core.domain.sandwich.SandwichCalculator
 import noweekend.core.domain.tag.RecommendType
 import noweekend.core.domain.tag.TagReader
 import noweekend.core.domain.tag.TagRecommendCache
@@ -36,6 +34,7 @@ import noweekend.core.support.error.CoreException
 import noweekend.core.support.error.ErrorType
 import org.springframework.stereotype.Service
 import java.time.LocalDate
+import java.time.Year
 import java.time.temporal.ChronoUnit
 import kotlin.random.Random
 
@@ -50,6 +49,7 @@ class RecommendServiceImpl(
     private val tagRecommendCacheReader: TagRecommendCacheReader,
     private val tagRecommendCacheWriter: TagRecommendCacheWriter,
     private val weekendReader: WeekendReader,
+    private val calculator: SandwichCalculator,
 ) : RecommendService {
 
     override fun getWeatherRecommend(userId: String): WeatherResponse {
@@ -208,42 +208,43 @@ class RecommendServiceImpl(
         throw CoreException(ErrorType.MCP_SERVER_TAGS_ERROR)
     }
 
-    override fun getSandwich(userId: String): SandwichApiResponse {
-        val findUser = userReader.findUserById(userId) ?: throw CoreException(ErrorType.USER_NOT_FOUND_INTERNAL)
-        val birthDate = findUser.birthDate ?: throw CoreException(ErrorType.USER_BIRTH_DAY_NOT_FOUND)
-        val holidays: List<LocalDate> = holidayReader.findRemainingHolidays(LocalDate.now())
-            .map { holiday: Holiday -> holiday.date }
-
-        val weekends: List<LocalDate> = weekendReader.getUpcomingWeekends().map { weekend -> weekend.date }
+    override fun getSandwich(): SandwichApiResponse {
+        // 1) 기준 날짜
+        val today = LocalDate.now()
 
-        val holidayOrWeekendSet = holidays.toSet() + weekends.toSet()
-        val remainingAnnualLeave = findUser.remainingAnnualLeave ?: throw CoreException(ErrorType.INVALID_LOCATION)
+        // 2) 남은 공휴일, 주말 조회
+        val holidays = holidayReader.findRemainingHolidays(today).map { it.date }.toSet()
+        val weekends = weekendReader.getAllThisYearWeekends()
+            .map { it.date }
+            .filter { it.isAfter(today) }
+            .toSet()
+
+        // 3) 연말까지 계산
+        val until = Year.now().atMonth(12).atEndOfMonth()
+        val periods = calculator.recommendSandwich(
+            holidays = holidays,
+            weekends = weekends,
+            maxGap = 2,
+            minSpan = 3,
+            from = today,
+            until = until,
+        )
 
-        try {
-            val bridgePeriods = recommendClient.getSandwich(
-                SandwichRequest(birthDay = birthDate, holidays = holidays, remainingAnnualLeave.toInt(), weekends),
-            )
-            return SandwichApiResponse(
-                bridgePeriods.map { period ->
-                    val allDates = generateDateRange(period.startDate, period.endDate)
-                    val useAnnualLeaveDates = allDates.filter { date ->
-                        !holidayOrWeekendSet.contains(date) && date.dayOfWeek.value in 1..5
-                    }
-                    SandwichResponse(
-                        startDate = period.startDate,
-                        endDate = period.endDate,
-                        useAnnualLeave = useAnnualLeaveDates.size,
-                        totalVacationDays = allDates.size,
-                    )
-                }.toList(),
+        // 4) VacationPeriod → SandwichResponse 매핑
+        val responses = periods.map { period ->
+            val totalDays = ChronoUnit.DAYS.between(period.startDate, period.endDate).toInt() + 1
+            val useAnnualLeave = generateSequence(period.startDate) { it.plusDays(1) }
+                .takeWhile { !it.isAfter(period.endDate) }
+                .count { date -> date !in holidays && date !in weekends }
+            SandwichResponse(
+                startDate = period.startDate,
+                endDate = period.endDate,
+                useAnnualLeave = useAnnualLeave,
+                totalVacationDays = totalDays,
             )
-        } catch (_: McpNotRespondingException) {
-            throw CoreException(ErrorType.MCP_SERVER_INTERNAL_ERROR)
         }
-    }
 
-    fun generateDateRange(start: LocalDate, end: LocalDate): List<LocalDate> {
-        return (0..ChronoUnit.DAYS.between(start, end)).map { start.plusDays(it) }
+        return SandwichApiResponse(responses = responses)
     }
 
     override fun generateVacation(userId: String, request: GenerateVacationRequest): AiGenerateVacationApiResponse {

noweekend-core/core-domain/src/main/kotlin/noweekend/core/domain/sandwich/Sandwich.kt

@@ -0,0 +1,5 @@
+package noweekend.core.domain.sandwich
+
+import java.time.LocalDate
+
+data class Sandwich(val startDate: LocalDate, val endDate: LocalDate)