방 비교 결과 조회 API를 만든다.

backend/bang-ggood/src/main/java/com/bang_ggood/category/domain/Badge.java

@@ -10,7 +10,8 @@ public enum Badge {
     SECURITY("보안", "안전해요", "🔒"),
     ECONOMIC("경제적", "경제적이에요", "💰")
     ;
-
+
+    private static final String DESCRIPTION_FORMAT = "%s %s";
     private final String shortDescription;
     private final String longDescription;
     private final String emoji;
@@ -22,10 +23,10 @@ public enum Badge {
     }
 
     public String getShortDescriptionWithEmoji() {
-        return this.emoji + this.shortDescription;
+        return String.format(DESCRIPTION_FORMAT, this.emoji, this.shortDescription);
     }
 
     public String getLongDescriptionWithEmoji() {
-        return this.emoji + this.longDescription;
+        return String.format(DESCRIPTION_FORMAT, this.emoji, this.longDescription);
     }
 }

backend/bang-ggood/src/main/java/com/bang_ggood/category/domain/Category.java

@@ -1,7 +1,10 @@
 package com.bang_ggood.category.domain;
 
+import com.bang_ggood.checklist.domain.ChecklistQuestion;
+import com.bang_ggood.checklist.domain.Grade;
 import java.util.Arrays;
 import java.util.LinkedHashSet;
+import java.util.List;
 import java.util.Set;
 
 public enum Category {
@@ -31,13 +34,45 @@ public static boolean contains(int id) {
                 .anyMatch(category -> category.id == id);
     }
 
+    // 2. 뱃지 부여
+    public static List<Badge> getBadges(List<ChecklistQuestion> questions) {
+        return Arrays.stream(values())
+                .filter(category -> category.calculateTotalScore(questions) >= 80)
+                .map(Category::getBadge)
+                .toList();
+    }
+
+    // 1. 총점 : score * 100 / maxScore
+    public int calculateTotalScore(List<ChecklistQuestion> questions) {
+        List<ChecklistQuestion> filteredQuestions = filterQuestion(questions);
+
+        if (filteredQuestions.isEmpty()) {
+            return 0;
+        }
+
+        int maxScore = Grade.calculateMaxScore(filteredQuestions.size());
+        int score = filteredQuestions.stream()
+                .mapToInt(question -> Grade.getScore(question.getAnswer()))
+                .sum();
+
+        return score * 100 / maxScore;
+    }
+
+    private List<ChecklistQuestion> filterQuestion(List<ChecklistQuestion> questions) {
+        return questions.stream()
+                .filter(checklistQuestion -> questionIds.contains(checklistQuestion.getQuestionId()))
+                .toList();
+    }
+
     public int getId() {
         return id;
     }
 
     public String getDescription() {
         return description;
     }
+
+    public Badge getBadge() { return badge; }
 
     public Set<Integer> getQuestionIds() {
         return questionIds;

backend/bang-ggood/src/main/java/com/bang_ggood/checklist/controller/ChecklistController.java

@@ -2,14 +2,18 @@
 
 import com.bang_ggood.checklist.dto.ChecklistCreateRequest;
 import com.bang_ggood.checklist.dto.ChecklistQuestionsResponse;
+import com.bang_ggood.checklist.dto.ChecklistsComparisonReadResponse;
+import com.bang_ggood.checklist.dto.UserChecklistsPreviewResponse;
 import com.bang_ggood.checklist.service.ChecklistService;
 import jakarta.validation.Valid;
-import java.net.URI;
 import org.springframework.http.ResponseEntity;
 import org.springframework.web.bind.annotation.GetMapping;
 import org.springframework.web.bind.annotation.PostMapping;
 import org.springframework.web.bind.annotation.RequestBody;
+import org.springframework.web.bind.annotation.RequestParam;
 import org.springframework.web.bind.annotation.RestController;
+import java.net.URI;
+import java.util.List;
 
 @RestController
 public class ChecklistController {
@@ -26,8 +30,18 @@ public ResponseEntity<Void> createChecklist(@Valid @RequestBody ChecklistCreateR
         return ResponseEntity.created(URI.create("/checklists/" + checklistId)).build();
     }
 
+    @GetMapping("/checklists")
+    public ResponseEntity<UserChecklistsPreviewResponse> readUserChecklistsPreview() {
+        return ResponseEntity.ok(checklistService.readUserChecklistsPreview());
+    }
+
     @GetMapping("/checklists/questions")
     public ResponseEntity<ChecklistQuestionsResponse> readChecklistQuestions() {
         return ResponseEntity.ok(checklistService.readChecklistQuestions());
     }
+
+    @GetMapping("/checklists/comparison")
+    public ResponseEntity<ChecklistsComparisonReadResponse> readChecklistsComparison(@RequestParam("id")List<Long> checklistIds) {
+        return ResponseEntity.ok(checklistService.readChecklistsComparison(checklistIds));
+    }
 }

backend/bang-ggood/src/main/java/com/bang_ggood/checklist/domain/Checklist.java

@@ -9,7 +9,9 @@
 import jakarta.persistence.GenerationType;
 import jakarta.persistence.Id;
 import jakarta.persistence.ManyToOne;
+import jakarta.persistence.OneToMany;
 import jakarta.persistence.OneToOne;
+import java.util.List;
 import java.util.Objects;
 
 
@@ -34,6 +36,9 @@ public class Checklist extends BaseEntity {
 
     private String realEstate;
 
+    @OneToMany(mappedBy = "checklist")
+    private List<ChecklistQuestion> questions;
+
     public Checklist(User user, Room room, Integer deposit, Integer rent, Integer contractTerm, String realEstate) {
         this.user = user;
         this.room = room;
@@ -58,10 +63,20 @@ public User getUser() {
         return user;
     }
 
-    public Room getRoom() {
-        return room;
+    public String getRoomName() {
+        return room.getName();
+    }
+
+    public String getRoomAddress() {
+        return room.getAddress();
     }
 
+    public Integer getRoomFloor() { return room.getFloor(); }
+
+    public String getRoomStation() { return room.getStation(); }
+
+    public Integer getRoomWalkingTime() { return room.getWalkingTime(); }
+
     public Integer getDeposit() {
         return deposit;
     }
@@ -78,6 +93,10 @@ public String getRealEstate() {
         return realEstate;
     }
 
+    public List<ChecklistQuestion> getQuestions() {
+        return questions;
+    }
+
     @Override
     public boolean equals(Object o) {
         if (this == o) {

backend/bang-ggood/src/main/java/com/bang_ggood/checklist/domain/Grade.java

@@ -1,11 +1,28 @@
 package com.bang_ggood.checklist.domain;
 
+import java.util.Arrays;
+
 public enum Grade {
 
     GOOD(3),
     SOSO(2),
     BAD(1);
 
+    private final int score;
+
     Grade(int score) {
+        this.score = score;
+    }
+
+    public static int calculateMaxScore(int size) {
+        return GOOD.score * size;
+    }
+
+    public static int getScore(String answer) {
+        return Arrays.stream(values())
+                .filter(grade -> grade.name().equals(answer))
+                .findAny()
+                .get()
+                .score;
     }
 }

backend/bang-ggood/src/main/java/com/bang_ggood/checklist/dto/BadgeResponse.java

@@ -0,0 +1,10 @@
+package com.bang_ggood.checklist.dto;
+
+import com.bang_ggood.category.domain.Badge;
+
+public record BadgeResponse(String shortName, String longName) {
+
+    public static BadgeResponse from(Badge badge) {
+        return new BadgeResponse(badge.getShortDescriptionWithEmoji(), badge.getLongDescriptionWithEmoji());
+    }
+}

backend/bang-ggood/src/main/java/com/bang_ggood/checklist/dto/CategoryScoreReadResponse.java

@@ -0,0 +1,6 @@
+package com.bang_ggood.checklist.dto;
+
+public record CategoryScoreReadResponse(
+        Integer categoryId, String categoryName, Integer score
+) {
+}

backend/bang-ggood/src/main/java/com/bang_ggood/checklist/dto/ChecklistComparisonReadResponse.java

@@ -0,0 +1,29 @@
+package com.bang_ggood.checklist.dto;
+
+import com.bang_ggood.checklist.domain.Checklist;
+import java.util.List;
+
+public record ChecklistComparisonReadResponse(
+        Long checklistId, String roomName, String address,
+        Integer floor, Integer deposit, Integer rent,
+        Integer contractTerm, String station, Integer walkingTime,
+        Integer optionCount, Integer score,
+        List<CategoryScoreReadResponse> categories
+) {
+    public static ChecklistComparisonReadResponse of(Checklist checklist, int checklistOptionCount, int checklistScore, List<CategoryScoreReadResponse> categoryScores) {
+        return new ChecklistComparisonReadResponse(
+                checklist.getId(),
+                checklist.getRoomName(),
+                checklist.getRoomAddress(),
+                checklist.getRoomFloor(),
+                checklist.getDeposit(),
+                checklist.getRent(),
+                checklist.getContractTerm(),
+                checklist.getRoomStation(),
+                checklist.getRoomWalkingTime(),
+                checklistOptionCount,
+                checklistScore,
+                categoryScores
+        );
+    }
+}

backend/bang-ggood/src/main/java/com/bang_ggood/checklist/dto/ChecklistsComparisonReadResponse.java

@@ -0,0 +1,6 @@
+package com.bang_ggood.checklist.dto;
+
+import java.util.List;
+
+public record ChecklistsComparisonReadResponse(List<ChecklistComparisonReadResponse> checklists) {
+}

backend/bang-ggood/src/main/java/com/bang_ggood/checklist/dto/UserChecklistPreviewResponse.java

@@ -0,0 +1,22 @@
+package com.bang_ggood.checklist.dto;
+
+import com.bang_ggood.checklist.domain.Checklist;
+import java.time.LocalDateTime;
+import java.util.List;
+
+public record UserChecklistPreviewResponse(
+        Long checklistId, String roomName, String address,
+        Integer deposit, Integer rent, LocalDateTime createdAt,
+        List<BadgeResponse> badge) {
+
+    public static UserChecklistPreviewResponse of(Checklist checklist, List<BadgeResponse> badges) {
+        return new UserChecklistPreviewResponse(
+                checklist.getId(),
+                checklist.getRoomName(),
+                checklist.getRoomAddress(),
+                checklist.getDeposit(),
+                checklist.getRent(),
+                checklist.getCreatedAt(),
+                badges);
+    }
+}

backend/bang-ggood/src/main/java/com/bang_ggood/checklist/dto/UserChecklistsPreviewResponse.java

@@ -0,0 +1,6 @@
+package com.bang_ggood.checklist.dto;
+
+import java.util.List;
+
+public record UserChecklistsPreviewResponse(List<UserChecklistPreviewResponse> checklists) {
+}

backend/bang-ggood/src/main/java/com/bang_ggood/checklist/repository/ChecklistOptionRepository.java

@@ -1,7 +1,10 @@
 package com.bang_ggood.checklist.repository;
 
+import com.bang_ggood.checklist.domain.Checklist;
 import com.bang_ggood.checklist.domain.ChecklistOption;
 import org.springframework.data.jpa.repository.JpaRepository;
 
 public interface ChecklistOptionRepository extends JpaRepository<ChecklistOption, Long> {
+
+    Integer countByChecklist(Checklist checklist);
 }

backend/bang-ggood/src/main/java/com/bang_ggood/checklist/repository/ChecklistRepository.java

@@ -1,7 +1,12 @@
 package com.bang_ggood.checklist.repository;
 
 import com.bang_ggood.checklist.domain.Checklist;
+import com.bang_ggood.user.domain.User;
 import org.springframework.data.jpa.repository.JpaRepository;
+import java.util.List;
 
 public interface ChecklistRepository extends JpaRepository<Checklist, Long> {
+
+    List<Checklist> findByUser(User user);
+    List<Checklist> findByUserAndIdIn(User user, List<Long> checklistIds);
 }