add : 회원가입 시, 전체 멤버에 대한 기본 관계 생성

api/src/main/kotlin/com/mashup/dojo/MemberController.kt

@@ -53,6 +53,9 @@ class MemberController(
                 )
             )
 
+        // 가입된 멤버에 대해서 기본 관계 생성
+        memberUseCase.createDefaultMemberRelation(memberId)
+
         return DojoApiResponse.success(MemberCreateResponse(memberId))
     }
 

service/src/main/kotlin/com/mashup/dojo/domain/MemberRelation.kt

@@ -18,7 +18,7 @@ data class MemberRelation(
     val lastUpdatedAt: LocalDateTime,
 ) {
     companion object {
-        fun create(
+        fun createAccompanyRelation(
             fromId: MemberId,
             toId: MemberId,
         ): MemberRelation {

service/src/main/kotlin/com/mashup/dojo/service/MemberRelationService.kt

@@ -23,6 +23,11 @@ interface MemberRelationService {
         toId: MemberId,
     )
 
+    fun bulkCreateRelation(
+        fromId: MemberId,
+        theOtherMemberIds: List<MemberId>,
+    ): List<MemberRelationId>
+
     fun updateRelationToFriend(
         fromId: String,
         toId: String,
@@ -56,10 +61,24 @@ class DefaultMemberRelationService(
         fromId: MemberId,
         toId: MemberId,
     ) {
-        val memberRelation = MemberRelation.create(fromId, toId)
+        val memberRelation = MemberRelation.createAccompanyRelation(fromId, toId)
         memberRelationRepository.save(memberRelation.toEntity())
     }
 
+    @Transactional
+    override fun bulkCreateRelation(
+        fromId: MemberId,
+        theOtherMemberIds: List<MemberId>,
+    ): List<MemberRelationId> {
+        val memberRelationEntityList =
+            theOtherMemberIds.map {
+                MemberRelation.createAccompanyRelation(fromId, it).toEntity()
+            }
+
+        val entities = memberRelationRepository.saveAll(memberRelationEntityList)
+        return entities.map { MemberRelationId(it.id) }
+    }
+
     @Transactional
     override fun updateRelationToFriend(
         fromId: String,

service/src/main/kotlin/com/mashup/dojo/usecase/MemberUseCase.kt

@@ -6,6 +6,7 @@ import com.mashup.dojo.domain.ImageId
 import com.mashup.dojo.domain.MemberGender
 import com.mashup.dojo.domain.MemberId
 import com.mashup.dojo.domain.MemberPlatform
+import com.mashup.dojo.domain.MemberRelationId
 import com.mashup.dojo.service.CoinService
 import com.mashup.dojo.service.ImageService
 import com.mashup.dojo.service.MemberRelationService
@@ -47,6 +48,8 @@ interface MemberUseCase {
 
     // ToDo 로직 연결 후 추후 제거
     fun findMemberByIdMock(targetMemberId: MemberId): ProfileResponse
+
+    fun createDefaultMemberRelation(newMemberId: MemberId): List<MemberRelationId>
 }
 
 @Component
@@ -132,4 +135,14 @@ class DefaultMemberUseCase(
             friendCount = 0
         )
     }
+
+    @Transactional
+    override fun createDefaultMemberRelation(newMemberId: MemberId): List<MemberRelationId> {
+        val allMemberIds =
+            memberService.findAllMember()
+                .filter { it.id != newMemberId }
+                .map { it.id }
+
+        return memberRelationService.bulkCreateRelation(newMemberId, allMemberIds)
+    }
 }