feat: 일별 목표(DailyGoal) 도메인 모델 및 API 구현 (#38) (#39)

특정 날짜에 목표를 배치하는 DailyGoal 기능을 goal BC 내부에 구현.
내부 도메인 모델(DailyGoal 엔티티)은 유지하되, GraphQL API는 Goal 중심으로
단순화하여 myGoals 필터(GoalFilter)로 조회하는 방식 채택.

Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: robinjoon

docs/plan/#38-daily-goal/checklist.md

@@ -0,0 +1,13 @@
+# 일별 목표(DailyGoal) 검증 체크리스트
+
+## 필수 항목
+- [x] 아키텍처 원칙 준수 (docs/architecture.md 기준)
+- [x] 레이어 의존성 규칙 위반 없음
+- [x] Domain, Application 테스트 코드 작성 완료 (TDD)
+- [x] 모든 테스트 통과
+- [x] 기존 테스트 깨지지 않음
+- [x] DGS Codegen으로 GraphQL 타입 자동 생성 (수동 작성 금지)
+
+## 선택 항목
+- [x] Flyway 마이그레이션 작성 (V5__Create_daily_goal_table.sql)
+- [x] Goal + Date + Member 유니크 제약 적용

docs/plan/#38-daily-goal/plan.md

@@ -0,0 +1,36 @@
+# 일별 목표(DailyGoal) 구현 계획
+
+> Issue: #38
+
+## 단계
+
+- [x] 1단계: Domain — DailyGoal 엔티티, VO, Command, Query, Repository 인터페이스 (TDD)
+- [x] 2단계: Application — GoalService에 DailyGoal 메서드 추가 (TDD)
+- [x] 3단계: Infrastructure — DailyGoalTable, ExposedDailyGoalRepository, Flyway 마이그레이션
+- [x] 4단계: Presentation — GraphQL 스키마 확장, GoalDataFetcher 업데이트
+- [x] 5단계: 검증 — 전체 테스트 통과, 아키텍처 준수 확인
+
+## 리팩토링: DailyGoal API를 Goal 중심으로 단순화
+
+GraphQL의 선택적 필드 조회 특성을 활용하여, 별도 DailyGoal 타입을 API에서 제거하고 Goal에 통합.
+내부 도메인 모델(DailyGoal 엔티티)은 유지하되, 스키마 표면은 Goal 중심으로 변경.
+
+- [x] 6단계: GraphQL 스키마 — DailyGoal 타입 제거, myGoals에 날짜 필터 추가, mutation 시그니처 변경
+- [x] 7단계: Domain — DailyGoalCommand.Remove를 goalId+memberId+date 기반으로 변경, GoalQuery에 assignedDate 추가
+- [x] 8단계: Application/Infrastructure — 변경된 Command/Query 반영
+- [x] 9단계: Presentation — GoalDataFetcher 리팩토링 (DailyGoal 리졸버 제거, myGoals 필터 적용)
+- [x] 10단계: 검증 — 전체 테스트 통과 확인
+
+## GoalFilter 확장: AND 조건 필터 추가
+
+GoalFilter에 ids 등 다양한 조건을 추가하고, 모든 조건은 AND로 결합.
+
+- [x] 11단계: GoalFilter 확장 — 스키마, GoalQuery, Repository, DataFetcher 일괄 변경
+- [x] 12단계: 검증 — 전체 테스트 통과 확인
+
+## GoalFilter 추가 필드: id, title, 우선순위 규칙
+
+id(단건) > ids(복수) > title 순 우선. assignedDate는 항상 AND. 이후 추가 조건도 AND.
+
+- [x] 13단계: GoalFilter에 id, title 추가 및 우선순위 로직 구현
+- [x] 14단계: 검증

src/main/kotlin/kr/io/team/loop/goal/application/service/GoalService.kt

@@ -1,25 +1,35 @@
 package kr.io.team.loop.goal.application.service
 
+import kr.io.team.loop.common.domain.GoalId
 import kr.io.team.loop.common.domain.MemberId
 import kr.io.team.loop.common.domain.exception.AccessDeniedException
+import kr.io.team.loop.common.domain.exception.DuplicateEntityException
 import kr.io.team.loop.common.domain.exception.EntityNotFoundException
+import kr.io.team.loop.goal.domain.model.DailyGoalCommand
 import kr.io.team.loop.goal.domain.model.Goal
 import kr.io.team.loop.goal.domain.model.GoalCommand
 import kr.io.team.loop.goal.domain.model.GoalQuery
+import kr.io.team.loop.goal.domain.repository.DailyGoalRepository
 import kr.io.team.loop.goal.domain.repository.GoalRepository
 import org.springframework.stereotype.Service
 import org.springframework.transaction.annotation.Transactional
 
 @Service
 class GoalService(
     private val goalRepository: GoalRepository,
+    private val dailyGoalRepository: DailyGoalRepository,
 ) {
     @Transactional
     fun create(command: GoalCommand.Create): Goal = goalRepository.save(command)
 
     @Transactional(readOnly = true)
     fun findAll(query: GoalQuery): List<Goal> = goalRepository.findAll(query)
 
+    @Transactional(readOnly = true)
+    fun findById(id: GoalId): Goal =
+        goalRepository.findById(id)
+            ?: throw EntityNotFoundException("Goal not found: ${id.value}")
+
     @Transactional
     fun update(
         command: GoalCommand.Update,
@@ -47,4 +57,31 @@ class GoalService(
         }
         goalRepository.delete(command)
     }
+
+    @Transactional
+    fun addDailyGoal(command: DailyGoalCommand.Add): Goal {
+        val goal =
+            goalRepository.findById(command.goalId)
+                ?: throw EntityNotFoundException("Goal not found: ${command.goalId.value}")
+        if (!goal.isOwnedBy(command.memberId)) {
+            throw AccessDeniedException("Goal does not belong to member: ${command.memberId.value}")
+        }
+        if (dailyGoalRepository.existsByGoalIdAndMemberIdAndDate(command.goalId, command.memberId, command.date)) {
+            throw DuplicateEntityException(
+                "DailyGoal already exists for goal ${command.goalId.value} on ${command.date}",
+            )
+        }
+        dailyGoalRepository.save(command)
+        return goal
+    }
+
+    @Transactional
+    fun removeDailyGoal(command: DailyGoalCommand.Remove) {
+        if (!dailyGoalRepository.existsByGoalIdAndMemberIdAndDate(command.goalId, command.memberId, command.date)) {
+            throw EntityNotFoundException(
+                "DailyGoal not found for goal ${command.goalId.value} on ${command.date}",
+            )
+        }
+        dailyGoalRepository.delete(command)
+    }
 }

src/main/kotlin/kr/io/team/loop/goal/domain/model/DailyGoal.kt

@@ -0,0 +1,16 @@
+package kr.io.team.loop.goal.domain.model
+
+import kotlinx.datetime.LocalDate
+import kr.io.team.loop.common.domain.GoalId
+import kr.io.team.loop.common.domain.MemberId
+import java.time.Instant
+
+data class DailyGoal(
+    val id: DailyGoalId,
+    val goalId: GoalId,
+    val memberId: MemberId,
+    val date: LocalDate,
+    val createdAt: Instant,
+) {
+    fun isOwnedBy(memberId: MemberId): Boolean = this.memberId == memberId
+}

src/main/kotlin/kr/io/team/loop/goal/domain/model/DailyGoalCommand.kt

@@ -0,0 +1,19 @@
+package kr.io.team.loop.goal.domain.model
+
+import kotlinx.datetime.LocalDate
+import kr.io.team.loop.common.domain.GoalId
+import kr.io.team.loop.common.domain.MemberId
+
+sealed interface DailyGoalCommand {
+    data class Add(
+        val goalId: GoalId,
+        val memberId: MemberId,
+        val date: LocalDate,
+    ) : DailyGoalCommand
+
+    data class Remove(
+        val goalId: GoalId,
+        val memberId: MemberId,
+        val date: LocalDate,
+    ) : DailyGoalCommand
+}

src/main/kotlin/kr/io/team/loop/goal/domain/model/DailyGoalId.kt

@@ -0,0 +1,12 @@
+package kr.io.team.loop.goal.domain.model
+
+import kr.io.team.loop.common.domain.exception.InvalidInputException
+
+@JvmInline
+value class DailyGoalId(
+    val value: Long,
+) {
+    init {
+        if (value <= 0) throw InvalidInputException("DailyGoalId must be positive")
+    }
+}

src/main/kotlin/kr/io/team/loop/goal/domain/model/GoalQuery.kt

@@ -1,7 +1,13 @@
 package kr.io.team.loop.goal.domain.model
 
+import kotlinx.datetime.LocalDate
+import kr.io.team.loop.common.domain.GoalId
 import kr.io.team.loop.common.domain.MemberId
 
 data class GoalQuery(
     val memberId: MemberId? = null,
+    val id: GoalId? = null,
+    val ids: List<GoalId>? = null,
+    val title: String? = null,
+    val assignedDate: LocalDate? = null,
 )

src/main/kotlin/kr/io/team/loop/goal/domain/repository/DailyGoalRepository.kt

@@ -0,0 +1,19 @@
+package kr.io.team.loop.goal.domain.repository
+
+import kotlinx.datetime.LocalDate
+import kr.io.team.loop.common.domain.GoalId
+import kr.io.team.loop.common.domain.MemberId
+import kr.io.team.loop.goal.domain.model.DailyGoal
+import kr.io.team.loop.goal.domain.model.DailyGoalCommand
+
+interface DailyGoalRepository {
+    fun save(command: DailyGoalCommand.Add): DailyGoal
+
+    fun delete(command: DailyGoalCommand.Remove)
+
+    fun existsByGoalIdAndMemberIdAndDate(
+        goalId: GoalId,
+        memberId: MemberId,
+        date: LocalDate,
+    ): Boolean
+}

src/main/kotlin/kr/io/team/loop/goal/infrastructure/persistence/DailyGoalTable.kt

@@ -0,0 +1,19 @@
+package kr.io.team.loop.goal.infrastructure.persistence
+
+import org.jetbrains.exposed.v1.core.Table
+import org.jetbrains.exposed.v1.datetime.date
+import org.jetbrains.exposed.v1.datetime.timestampWithTimeZone
+
+object DailyGoalTable : Table("daily_goal") {
+    val dailyGoalId = long("daily_goal_id").autoIncrement()
+    val goalId = long("goal_id")
+    val memberId = long("member_id").index()
+    val date = date("date")
+    val createdAt = timestampWithTimeZone("created_at")
+
+    override val primaryKey = PrimaryKey(dailyGoalId)
+
+    init {
+        uniqueIndex(goalId, memberId, date)
+    }
+}

src/main/kotlin/kr/io/team/loop/goal/infrastructure/persistence/ExposedDailyGoalRepository.kt

@@ -0,0 +1,58 @@
+package kr.io.team.loop.goal.infrastructure.persistence
+
+import kotlinx.datetime.LocalDate
+import kr.io.team.loop.common.domain.GoalId
+import kr.io.team.loop.common.domain.MemberId
+import kr.io.team.loop.goal.domain.model.DailyGoal
+import kr.io.team.loop.goal.domain.model.DailyGoalCommand
+import kr.io.team.loop.goal.domain.model.DailyGoalId
+import kr.io.team.loop.goal.domain.repository.DailyGoalRepository
+import org.jetbrains.exposed.v1.core.and
+import org.jetbrains.exposed.v1.core.eq
+import org.jetbrains.exposed.v1.jdbc.deleteWhere
+import org.jetbrains.exposed.v1.jdbc.insert
+import org.jetbrains.exposed.v1.jdbc.selectAll
+import org.springframework.stereotype.Repository
+import java.time.OffsetDateTime
+
+@Repository
+class ExposedDailyGoalRepository : DailyGoalRepository {
+    override fun save(command: DailyGoalCommand.Add): DailyGoal {
+        val now = OffsetDateTime.now()
+        val row =
+            DailyGoalTable.insert {
+                it[goalId] = command.goalId.value
+                it[memberId] = command.memberId.value
+                it[date] = command.date
+                it[createdAt] = now
+            }
+        return DailyGoal(
+            id = DailyGoalId(row[DailyGoalTable.dailyGoalId]),
+            goalId = command.goalId,
+            memberId = command.memberId,
+            date = command.date,
+            createdAt = now.toInstant(),
+        )
+    }
+
+    override fun delete(command: DailyGoalCommand.Remove) {
+        DailyGoalTable.deleteWhere {
+            (goalId eq command.goalId.value) and
+                (memberId eq command.memberId.value) and
+                (date eq command.date)
+        }
+    }
+
+    override fun existsByGoalIdAndMemberIdAndDate(
+        goalId: GoalId,
+        memberId: MemberId,
+        date: LocalDate,
+    ): Boolean =
+        DailyGoalTable
+            .selectAll()
+            .where {
+                (DailyGoalTable.goalId eq goalId.value) and
+                    (DailyGoalTable.memberId eq memberId.value) and
+                    (DailyGoalTable.date eq date)
+            }.count() > 0
+}