feat: Implement onboarding status API and related business logic

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

@@ -5,6 +5,7 @@ import noweekend.core.api.controller.v1.request.LeaveInputRequest
 import noweekend.core.api.controller.v1.request.ProfileRequest
 import noweekend.core.api.controller.v1.request.TagRequest
 import noweekend.core.api.controller.v1.response.DefaultTags
+import noweekend.core.api.controller.v1.response.OnboardingStatusResponse
 import noweekend.core.api.security.annotations.CurrentUserId
 import noweekend.core.domain.user.UserService
 import noweekend.core.support.response.ApiResponse
@@ -62,4 +63,13 @@ class OnboardingController(
             "연차 정보가 성공적으로 저장되었습니다.",
         )
     }
+
+    @GetMapping("/onboarding/status")
+    override fun getOnboardingStatus(
+        @CurrentUserId userId: String,
+    ): ApiResponse<OnboardingStatusResponse> {
+        return ApiResponse.success(
+            userService.getOnboardingStatus(userId),
+        )
+    }
 }

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

@@ -11,6 +11,7 @@ import noweekend.core.api.controller.v1.request.LeaveInputRequest
 import noweekend.core.api.controller.v1.request.ProfileRequest
 import noweekend.core.api.controller.v1.request.TagRequest
 import noweekend.core.api.controller.v1.response.DefaultTags
+import noweekend.core.api.controller.v1.response.OnboardingStatusResponse
 import noweekend.core.api.security.annotations.CurrentUserId
 import noweekend.core.support.response.ApiResponse
 import io.swagger.v3.oas.annotations.responses.ApiResponse as SwaggerApiResponse
@@ -340,4 +341,72 @@ interface OnboardingControllerDocs {
     fun getDefaultTag(
         @Parameter(hidden = true) @CurrentUserId userId: String,
     ): ApiResponse<DefaultTags>
+
+    @Operation(
+        summary = "온보딩: 사용자 진행 상태 조회",
+        description = """
+        온보딩 플로우(이름/생년월일, 연차, 일정 태그) 입력 진행 상황을 반환합니다.
+
+        status 값 설명:
+        - NONE: 이름/생년월일 미입력 상태
+        - NAME_AND_BIRTHDAY: 이름/생년월일 입력만 완료
+        - ANNUAL_LEAVE: 연차 입력까지 완료
+        - DONE: 모든 온보딩 절차 완료
+    """,
+        responses = [
+            SwaggerApiResponse(
+                responseCode = "200",
+                description = "온보딩 상태 조회 성공",
+                content = [
+                    Content(
+                        mediaType = "application/json",
+                        schema = Schema(implementation = ApiResponse::class),
+                        examples = [
+                            ExampleObject(
+                                name = "예시 응답",
+                                value = """
+{
+  "result": "SUCCESS",
+  "data": {
+    "status": "DONE"
+  },
+  "error": null
+}
+""",
+                            ),
+                        ],
+                    ),
+                ],
+            ),
+            SwaggerApiResponse(
+                responseCode = "400",
+                description = "온보딩 순서에 맞지 않게 데이터가 입력된 경우",
+                content = [
+                    Content(
+                        mediaType = "application/json",
+                        schema = Schema(implementation = ApiResponse::class),
+                        examples = [
+                            ExampleObject(
+                                name = "온보딩 순서 오류 예시",
+                                value = """
+{
+  "result": "ERROR",
+  "data": null,
+  "error": {
+    "code": "INVALID_ONBOARD_STATUS",
+    "message": "온보딩 순서에 맞게 요청하지 않은 상태입니다. 사용자 정보조회하여 어떤 값이 입력되지 않았는지 확인해주세요.",
+    "data": {}
+  }
+}
+""",
+                            ),
+                        ],
+                    ),
+                ],
+            ),
+        ],
+    )
+    fun getOnboardingStatus(
+        @Parameter(hidden = true) @CurrentUserId userId: String,
+    ): ApiResponse<OnboardingStatusResponse>
 }

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

@@ -0,0 +1,27 @@
+package noweekend.core.api.controller.v1.response
+
+import io.swagger.v3.oas.annotations.media.Schema
+
+@Schema(description = "온보딩 진행 상태 응답")
+data class OnboardingStatusResponse(
+    @Schema(
+        description = "온보딩 단계 상태 (NONE: 이름/생년월일 미입력, NAME_AND_BIRTHDAY: 이름/생년월일만 입력, ANNUAL_LEAVE: 연차까지 입력, DONE: 모든 온보딩 완료)",
+        example = "ANNUAL_LEAVE",
+    )
+    val status: OnboardingStatus,
+)
+
+@Schema(description = "온보딩 상태 Enum")
+enum class OnboardingStatus {
+    @Schema(description = "이름/생년월일 입력 전 상태")
+    NONE,
+
+    @Schema(description = "이름/생년월일 입력 완료 상태")
+    NAME_AND_BIRTHDAY,
+
+    @Schema(description = "연차 입력까지 완료된 상태")
+    ANNUAL_LEAVE,
+
+    @Schema(description = "모든 온보딩 완료 상태")
+    DONE,
+}

noweekend-core/core-api/src/main/kotlin/noweekend/core/domain/user/UserService.kt

@@ -4,6 +4,7 @@ import noweekend.core.api.controller.v1.request.LeaveInputRequest
 import noweekend.core.api.controller.v1.request.LocationRequest
 import noweekend.core.api.controller.v1.request.ProfileRequest
 import noweekend.core.api.controller.v1.request.TagUpdateRequest
+import noweekend.core.api.controller.v1.response.OnboardingStatusResponse
 import noweekend.core.api.controller.v1.response.UserInformationResponse
 import noweekend.core.domain.tag.BasicTag
 import noweekend.core.domain.tag.UserTags
@@ -17,4 +18,5 @@ interface UserService {
     fun getStateTags(userId: String): UserTags
     fun updateLocation(request: LocationRequest, userId: String)
     fun getUserInformationById(userId: String): UserInformationResponse
+    fun getOnboardingStatus(userId: String): OnboardingStatusResponse
 }

noweekend-core/core-api/src/main/kotlin/noweekend/core/domain/user/UserServiceImpl.kt

@@ -4,6 +4,8 @@ import noweekend.core.api.controller.v1.request.LeaveInputRequest
 import noweekend.core.api.controller.v1.request.LocationRequest
 import noweekend.core.api.controller.v1.request.ProfileRequest
 import noweekend.core.api.controller.v1.request.TagUpdateRequest
+import noweekend.core.api.controller.v1.response.OnboardingStatus
+import noweekend.core.api.controller.v1.response.OnboardingStatusResponse
 import noweekend.core.api.controller.v1.response.UserInformationResponse
 import noweekend.core.domain.enumerate.ScheduleCategory
 import noweekend.core.domain.schedule.ScheduleReader
@@ -66,7 +68,7 @@ class UserServiceImpl(
             daysToAdd += 0.5
         }
         val updatedUser = user.copy(
-            remainingAnnualLeave = user.remainingAnnualLeave + daysToAdd,
+            remainingAnnualLeave = (user.remainingAnnualLeave ?: 0.0) + daysToAdd,
         )
         userWriter.upsert(updatedUser)
     }
@@ -119,4 +121,36 @@ class UserServiceImpl(
 
         return UserInformationResponse.of(user, averageTemperature)
     }
+
+    override fun getOnboardingStatus(userId: String): OnboardingStatusResponse {
+        val user = userReader.findUserById(userId) ?: throw CoreException(ErrorType.USER_NOT_FOUND_INTERNAL)
+
+        val nameAndBirthdayEntered = user.birthDate != null && user.name != null
+        val annualLeaveEntered = user.remainingAnnualLeave != null
+        val userTags = tagReader.getUserTags(userId)
+        val selectedTagsCount = (userTags.selectedBasicTags + userTags.selectedCustomTags + userTags.selectedCustomTags + userTags.unselectedCustomTags).count { it.selected }
+        val tagEntered = selectedTagsCount > 0
+
+        // 1. 이름/생년월일 안됨 -> NONE
+        if (!nameAndBirthdayEntered && (!annualLeaveEntered || !tagEntered)) {
+            return OnboardingStatusResponse(OnboardingStatus.NONE)
+        }
+
+        // 2. 이름/생년월일만 됨 -> NAME_AND_BIRTHDAY
+        if (nameAndBirthdayEntered && !annualLeaveEntered && !tagEntered) {
+            return OnboardingStatusResponse(OnboardingStatus.NAME_AND_BIRTHDAY)
+        }
+
+        // 3. 연차까지 됨(이름/생년월일, 연차 ok, 태그 없음) -> ANNUAL_LEAVE
+        if (nameAndBirthdayEntered && annualLeaveEntered && !tagEntered) {
+            return OnboardingStatusResponse(OnboardingStatus.ANNUAL_LEAVE)
+        }
+
+        // 4. 모든게 정상적으로 입력됨 -> DONE
+        if (nameAndBirthdayEntered && annualLeaveEntered) {
+            return OnboardingStatusResponse(OnboardingStatus.DONE)
+        }
+
+        throw CoreException(ErrorType.INVALID_ONBOARD_STATUS)
+    }
 }

noweekend-core/core-api/src/main/kotlin/noweekend/core/support/error/ErrorType.kt

@@ -25,4 +25,5 @@ enum class ErrorType(
     MCP_SERVER_SANDWICH_ERROR(HttpStatus.GATEWAY_TIMEOUT, ErrorCode.E504, "MCP 추천 서버의 응답이 없습니다. 잠시 후 다시 시도해주세요.", LogLevel.ERROR),
     INVALID_LOCATION(HttpStatus.BAD_REQUEST, ErrorCode.E400, "사용자가 한국 위치가 아니기 때문에 날씨를 추천할 수 없습니다.", LogLevel.WARN),
     INVALID_SCHEDULE_TAG(HttpStatus.BAD_REQUEST, ErrorCode.E400, "유효하지 않은 태그가 포함되어 있습니다.", LogLevel.WARN),
+    INVALID_ONBOARD_STATUS(HttpStatus.BAD_REQUEST, ErrorCode.E400, "온보딩 순서에 맞게 요청하지 않은 상태입니다. 사용자 정보조회하여 어떤 값이 입력되지 않았는지 확인해주세요.", LogLevel.WARN),
 }

noweekend-core/core-domain/src/main/kotlin/noweekend/core/domain/user/User.kt

@@ -17,7 +17,7 @@ data class User(
     val revocableToken: String?,
     val role: Role,
     val birthDate: LocalDate?,
-    val remainingAnnualLeave: Double = 0.0,
+    val remainingAnnualLeave: Double?,
     val createdAt: LocalDateTime?,
     val updatedAt: LocalDateTime?,
     var deleted: Boolean,
@@ -41,6 +41,7 @@ data class User(
                 revocableToken = revocableToken,
                 role = role,
                 birthDate = null,
+                remainingAnnualLeave = null,
                 createdAt = null,
                 updatedAt = null,
                 deleted = false,

noweekend-storage/db-core/src/main/kotlin/noweekend/storage/db/core/user/UserEntity.kt

@@ -56,7 +56,7 @@ class UserEntity(
     val birthDate: LocalDate? = null,
 
     @Column(name = "remaining_annual_leave", nullable = true)
-    val remainingAnnualLeave: Double = 0.0,
+    val remainingAnnualLeave: Double?,
 
     @Embedded
     var location: LocationEmbeddable?,