refactor: 패키지 구조 정리 및 추천 알고리즘 추상화

backend/src/main/java/com/digginroom/digginroom/admin/controller/UploadController.java

@@ -2,7 +2,7 @@
 
 import com.digginroom.digginroom.admin.controller.dto.UploadRequest;
 import com.digginroom.digginroom.admin.service.UploadService;
-import com.digginroom.digginroom.domain.Genre;
+import com.digginroom.digginroom.domain.room.Genre;
 import jakarta.validation.Valid;
 import lombok.RequiredArgsConstructor;
 import org.springframework.http.ResponseEntity;

backend/src/main/java/com/digginroom/digginroom/admin/controller/dto/UploadRequest.java

@@ -1,6 +1,6 @@
 package com.digginroom.digginroom.admin.controller.dto;
 
-import com.digginroom.digginroom.domain.Genre;
+import com.digginroom.digginroom.domain.room.Genre;
 import jakarta.validation.constraints.NotBlank;
 import jakarta.validation.constraints.NotNull;
 import jakarta.validation.constraints.Size;

backend/src/main/java/com/digginroom/digginroom/controller/RoomController.java

@@ -1,9 +1,9 @@
 package com.digginroom.digginroom.controller;
 
+import com.digginroom.digginroom.service.RoomService;
 import com.digginroom.digginroom.service.dto.RoomRequest;
 import com.digginroom.digginroom.service.dto.RoomResponse;
 import com.digginroom.digginroom.service.dto.RoomsResponse;
-import com.digginroom.digginroom.service.RoomService;
 import lombok.RequiredArgsConstructor;
 import org.springframework.http.HttpStatus;
 import org.springframework.http.ResponseEntity;

backend/src/main/java/com/digginroom/digginroom/domain/UUIDBaseEntity.java

@@ -0,0 +1,29 @@
+package com.digginroom.digginroom.domain;
+
+import jakarta.persistence.Column;
+import jakarta.persistence.EntityListeners;
+import jakarta.persistence.GeneratedValue;
+import jakarta.persistence.GenerationType;
+import jakarta.persistence.Id;
+import jakarta.persistence.MappedSuperclass;
+import java.time.LocalDateTime;
+import java.util.UUID;
+import lombok.Getter;
+import org.springframework.data.annotation.CreatedDate;
+import org.springframework.data.annotation.LastModifiedDate;
+import org.springframework.data.jpa.domain.support.AuditingEntityListener;
+
+@Getter
+@MappedSuperclass
+@EntityListeners(AuditingEntityListener.class)
+public abstract class UUIDBaseEntity {
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.UUID)
+    private UUID id;
+    @CreatedDate
+    @Column(updatable = false)
+    private LocalDateTime createdAt;
+    @LastModifiedDate
+    private LocalDateTime updatedAt;
+}

backend/src/main/java/com/digginroom/digginroom/domain/member/Member.java

@@ -1,16 +1,14 @@
 package com.digginroom.digginroom.domain.member;
 
 import com.digginroom.digginroom.domain.BaseEntity;
-import com.digginroom.digginroom.domain.Genre;
+import com.digginroom.digginroom.domain.member.vo.Nickname;
+import com.digginroom.digginroom.domain.member.vo.Password;
+import com.digginroom.digginroom.domain.member.vo.Provider;
 import com.digginroom.digginroom.domain.room.Room;
-import com.digginroom.digginroom.exception.MemberException.DuplicatedFavoriteException;
-import com.digginroom.digginroom.exception.MemberException.EmptyFavoriteException;
-import com.digginroom.digginroom.exception.MemberException.FavoriteExistsException;
 import jakarta.persistence.Embedded;
 import jakarta.persistence.Entity;
 import jakarta.persistence.EnumType;
 import jakarta.persistence.Enumerated;
-import java.util.HashSet;
 import java.util.List;
 import java.util.UUID;
 import lombok.AccessLevel;
@@ -29,16 +27,10 @@ public class Member extends BaseEntity {
     private Password password;
     @Enumerated(value = EnumType.STRING)
     private Provider provider;
-    @Getter(AccessLevel.NONE)
-    private boolean hasFavorite = false;
     @Embedded
     private Nickname nickname;
     @Embedded
     private final ScrapRooms scrapRooms = new ScrapRooms();
-    @Embedded
-    private final DislikeRooms dislikeRooms = new DislikeRooms();
-    @Embedded
-    private final MemberGenres memberGenres = new MemberGenres(this);
 
     private Member(final String username, final Password password, final Provider provider, final Nickname nickname) {
         this.username = username;
@@ -66,70 +58,20 @@ public static Member guest() {
 
     public void scrap(final Room room) {
         scrapRooms.scrap(room);
-        adjustMemberGenreWeight(room, WeightFactor.SCRAP);
     }
 
     public void unscrap(final Room room) {
         scrapRooms.unscrap(room);
-        adjustMemberGenreWeight(room, WeightFactor.UNSCRAP);
-    }
-
-    public void dislike(final Room room) {
-        dislikeRooms.dislike(room);
-        adjustMemberGenreWeight(room, WeightFactor.DISLIKE);
-    }
-
-    public void undislike(final Room room) {
-        dislikeRooms.undislike(room);
-        adjustMemberGenreWeight(room, WeightFactor.UNDISLIKE);
-    }
-
-    public void markFavorite(final List<Genre> genres) {
-        if (hasFavorite) {
-            throw new FavoriteExistsException();
-        }
-        if (hasDuplicate(genres)) {
-            throw new DuplicatedFavoriteException();
-        }
-        if (genres.isEmpty()) {
-            throw new EmptyFavoriteException();
-        }
-
-        for (Genre genre : genres) {
-            memberGenres.adjustWeightBy(genre, WeightFactor.FAVORITE);
-        }
-        hasFavorite = true;
-    }
-
-    private boolean hasDuplicate(final List<Genre> genres) {
-        return new HashSet<>(genres).size() != genres.size();
-    }
-
-    private void adjustMemberGenreWeight(final Room room, final WeightFactor weightFactor) {
-        Genre superGenre = room.getTrack().getSuperGenre();
-        memberGenres.adjustWeightBy(superGenre, weightFactor);
-    }
-
-    public boolean hasFavorite() {
-        return hasFavorite;
     }
 
     public boolean hasScrapped(final Room pickedRoom) {
         return scrapRooms.hasScrapped(pickedRoom);
     }
 
-    public List<MemberGenre> getMemberGenres() {
-        return memberGenres.getAll();
-    }
-
     public List<Room> getScrapRooms() {
         return scrapRooms.getScrapRooms();
     }
 
-    public List<Room> getDislikeRooms() {
-        return dislikeRooms.getDislikeRooms();
-    }
-
     public String getNickname() {
         return nickname.getNickname();
     }

backend/src/main/java/com/digginroom/digginroom/domain/member/Nickname.java → backend/src/main/java/com/digginroom/digginroom/domain/member/vo/Nickname.java

@@ -1,4 +1,4 @@
-package com.digginroom.digginroom.domain.member;
+package com.digginroom.digginroom.domain.member.vo;
 
 import jakarta.persistence.Embeddable;
 import java.util.UUID;

backend/src/main/java/com/digginroom/digginroom/domain/member/Password.java → backend/src/main/java/com/digginroom/digginroom/domain/member/vo/Password.java

@@ -1,4 +1,4 @@
-package com.digginroom.digginroom.domain.member;
+package com.digginroom.digginroom.domain.member.vo;
 
 import com.digginroom.digginroom.util.PasswordEncoder;
 import jakarta.persistence.Embeddable;

backend/src/main/java/com/digginroom/digginroom/domain/member/Provider.java → backend/src/main/java/com/digginroom/digginroom/domain/member/vo/Provider.java

@@ -1,4 +1,4 @@
-package com.digginroom.digginroom.domain.member;
+package com.digginroom.digginroom.domain.member.vo;
 
 import java.util.Arrays;
 import java.util.Optional;

backend/src/main/java/com/digginroom/digginroom/domain/recommend/GenreRecommender.java

@@ -0,0 +1,8 @@
+package com.digginroom.digginroom.domain.recommend;
+
+import com.digginroom.digginroom.domain.room.Genre;
+
+public interface GenreRecommender {
+
+    Genre recommend(final Long memberId);
+}

backend/src/main/java/com/digginroom/digginroom/domain/recommend/RandomInGenreRoomRecommender.java

@@ -0,0 +1,33 @@
+package com.digginroom.digginroom.domain.recommend;
+
+import com.digginroom.digginroom.domain.room.Genre;
+import com.digginroom.digginroom.domain.room.Room;
+import com.digginroom.digginroom.exception.RecommendException.NoRecommendableRoomException;
+import com.digginroom.digginroom.repository.RoomRepository;
+import java.util.List;
+import java.util.concurrent.ThreadLocalRandom;
+import lombok.RequiredArgsConstructor;
+import org.springframework.stereotype.Component;
+
+@Component
+@RequiredArgsConstructor
+public class RandomInGenreRoomRecommender implements RoomRecommender {
+
+    private final RoomRepository roomRepository;
+    private final GenreRecommender genreRecommender;
+
+    @Override
+    public Long recommend(final Long memberId) {
+        Genre recommenedGenre = genreRecommender.recommend(memberId);
+        return recommendRoom(recommenedGenre).getId();
+    }
+
+    private Room recommendRoom(final Genre recommendedGenre) {
+        List<Room> rooms = roomRepository.findByTrackSuperGenre(recommendedGenre);
+        if (rooms.isEmpty()) {
+            throw new NoRecommendableRoomException(recommendedGenre.getName());
+        }
+        int pickedIndex = ThreadLocalRandom.current().nextInt(rooms.size());
+        return rooms.get(pickedIndex);
+    }
+}