[Feature] 관심사 목록 조회와 생성을 구현한다 (#77)

* feature: 관심사 목록 조회 구현

* style: 개행 제거

* feature: 관심사 생성 구현

src/main/java/daybyquest/badge/application/SaveBadgeService.java

@@ -13,7 +13,6 @@
 @Service
 public class SaveBadgeService {
 
-
     private static final String CATEGORY = "BADGE";
 
     private final Badges badges;

src/main/java/daybyquest/global/error/ExceptionCode.java

@@ -60,7 +60,8 @@ public enum ExceptionCode {
     EXCEED_BADGE("BDE-02", BAD_REQUEST, "뱃지는 최대 15개만 지정가능합니다"),
 
     // Interest
-    NOT_EXIST_INTEREST("INT-00", BAD_REQUEST, "존재하지 않는 관심사 입니다"),
+    NOT_EXIST_INTEREST("INT-00", BAD_REQUEST, "존재하지 않는 관심사입니다"),
+    ALREADY_EXIST_INTEREST("INT-01", BAD_REQUEST, "이미 존재하는 관심사 이름입니다"),
 
     // Relationship
     NOT_FOLLOWING_USER("REL-00", BAD_REQUEST, "팔로우하지 않은 사용자입니다"),

src/main/java/daybyquest/interest/application/GetInterestsService.java

@@ -0,0 +1,22 @@
+package daybyquest.interest.application;
+
+import daybyquest.interest.domain.Interests;
+import daybyquest.interest.dto.response.InterestResponse;
+import daybyquest.interest.dto.response.MultiInterestResponse;
+import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
+
+@Service
+public class GetInterestsService {
+
+    private final Interests interests;
+
+    public GetInterestsService(final Interests interests) {
+        this.interests = interests;
+    }
+
+    @Transactional(readOnly = true)
+    public MultiInterestResponse invoke() {
+        return new MultiInterestResponse(interests.findAll().stream().map(InterestResponse::of).toList());
+    }
+}

src/main/java/daybyquest/interest/application/SaveInterestService.java

@@ -0,0 +1,39 @@
+package daybyquest.interest.application;
+
+import daybyquest.global.utils.MultipartFileUtils;
+import daybyquest.image.vo.Image;
+import daybyquest.image.vo.ImageIdentifierGenerator;
+import daybyquest.image.vo.Images;
+import daybyquest.interest.domain.Interest;
+import daybyquest.interest.domain.Interests;
+import daybyquest.interest.dto.request.SaveInterestRequest;
+import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
+import org.springframework.web.multipart.MultipartFile;
+
+@Service
+public class SaveInterestService {
+
+    private static final String CATEGORY = "INTEREST";
+
+    private final Interests interests;
+
+    private final Images images;
+
+    private final ImageIdentifierGenerator generator;
+
+    public SaveInterestService(final Interests interests, final Images images,
+            final ImageIdentifierGenerator generator) {
+        this.interests = interests;
+        this.images = images;
+        this.generator = generator;
+    }
+
+    @Transactional
+    public void invoke(final SaveInterestRequest request, final MultipartFile file) {
+        final String identifier = generator.generateIdentifier(CATEGORY, file.getOriginalFilename());
+        images.upload(identifier, MultipartFileUtils.getInputStream(file));
+        final Interest interest = new Interest(request.getName(), new Image(identifier));
+        interests.save(interest);
+    }
+}

src/main/java/daybyquest/interest/domain/Interest.java

@@ -1,5 +1,6 @@
 package daybyquest.interest.domain;
 
+import daybyquest.global.error.exception.InvalidDomainException;
 import daybyquest.image.vo.Image;
 import jakarta.persistence.Column;
 import jakarta.persistence.Embedded;
@@ -14,8 +15,10 @@
 @NoArgsConstructor(access = AccessLevel.PROTECTED)
 public class Interest {
 
+    private static final int MAX_NAME_LENGTH = 20;
+
     @Id
-    @Column(length = 10)
+    @Column(length = MAX_NAME_LENGTH)
     private String name;
 
     @Embedded
@@ -24,5 +27,16 @@ public class Interest {
     public Interest(final String name, final Image image) {
         this.name = name;
         this.image = image;
+        validateName();
+    }
+
+    public String getImageIdentifier() {
+        return image.getImageIdentifier();
+    }
+
+    private void validateName() {
+        if (name.isEmpty() || name.length() > MAX_NAME_LENGTH) {
+            throw new InvalidDomainException();
+        }
     }
 }

src/main/java/daybyquest/interest/domain/InterestRepository.java

@@ -13,5 +13,7 @@ interface InterestRepository extends Repository<Interest, String> {
 
     List<Interest> findAllByNameIn(final Collection<String> names);
 
+    List<Interest> findAll();
+
     boolean existsByName(final String name);
 }

src/main/java/daybyquest/interest/domain/Interests.java

@@ -1,5 +1,8 @@
 package daybyquest.interest.domain;
 
+import static daybyquest.global.error.ExceptionCode.ALREADY_EXIST_INTEREST;
+
+import daybyquest.global.error.exception.InvalidDomainException;
 import daybyquest.global.error.exception.NotExistInterestException;
 import java.util.Collection;
 import java.util.List;
@@ -14,6 +17,17 @@ public class Interests {
         this.interestRepository = interestRepository;
     }
 
+    public void save(final Interest interest) {
+        validateNotExistentByName(interest.getName());
+        interestRepository.save(interest);
+    }
+
+    public void validateNotExistentByName(final String interestName) {
+        if (interestRepository.existsByName(interestName)) {
+            throw new InvalidDomainException(ALREADY_EXIST_INTEREST);
+        }
+    }
+
     public void validateInterest(final String interestName) {
         if (!interestRepository.existsByName(interestName)) {
             throw new NotExistInterestException();
@@ -35,4 +49,8 @@ private void validateContainsInterest(final Collection<String> interestStrings,
             throw new NotExistInterestException();
         }
     }
+
+    public List<Interest> findAll() {
+        return interestRepository.findAll();
+    }
 }

src/main/java/daybyquest/interest/dto/request/SaveInterestRequest.java

@@ -0,0 +1,13 @@
+package daybyquest.interest.dto.request;
+
+import jakarta.validation.constraints.NotBlank;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+
+@Getter
+@NoArgsConstructor
+public class SaveInterestRequest {
+
+    @NotBlank
+    private String name;
+}

src/main/java/daybyquest/interest/dto/response/InterestResponse.java

@@ -0,0 +1,23 @@
+package daybyquest.interest.dto.response;
+
+import daybyquest.interest.domain.Interest;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+
+@Getter
+@NoArgsConstructor
+public class InterestResponse {
+
+    private String name;
+
+    private String imageIdentifier;
+
+    private InterestResponse(final String name, final String imageIdentifier) {
+        this.name = name;
+        this.imageIdentifier = imageIdentifier;
+    }
+
+    public static InterestResponse of(final Interest interest) {
+        return new InterestResponse(interest.getName(), interest.getImageIdentifier());
+    }
+}

src/main/java/daybyquest/interest/dto/response/MultiInterestResponse.java

@@ -0,0 +1,16 @@
+package daybyquest.interest.dto.response;
+
+import java.util.List;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+
+@Getter
+@NoArgsConstructor
+public class MultiInterestResponse {
+
+    private List<InterestResponse> interests;
+
+    public MultiInterestResponse(final List<InterestResponse> interests) {
+        this.interests = interests;
+    }
+}

src/main/java/daybyquest/interest/presentation/InterestCommandApi.java

@@ -0,0 +1,31 @@
+package daybyquest.interest.presentation;
+
+import daybyquest.auth.Authorization;
+import daybyquest.auth.domain.AccessUser;
+import daybyquest.interest.application.SaveInterestService;
+import daybyquest.interest.dto.request.SaveInterestRequest;
+import jakarta.validation.Valid;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestPart;
+import org.springframework.web.bind.annotation.RestController;
+import org.springframework.web.multipart.MultipartFile;
+
+@RestController
+public class InterestCommandApi {
+
+    private final SaveInterestService saveInterestService;
+
+    public InterestCommandApi(final SaveInterestService saveInterestService) {
+        this.saveInterestService = saveInterestService;
+    }
+
+    @PostMapping("/interest")
+    @Authorization(admin = true)
+    public ResponseEntity<Void> saveInterest(final AccessUser user,
+            @RequestPart("image") final MultipartFile file,
+            @RequestPart("request") @Valid final SaveInterestRequest request) {
+        saveInterestService.invoke(request, file);
+        return ResponseEntity.ok().build();
+    }
+}

src/main/java/daybyquest/interest/presentation/InterestQueryApi.java

@@ -0,0 +1,23 @@
+package daybyquest.interest.presentation;
+
+import daybyquest.interest.application.GetInterestsService;
+import daybyquest.interest.dto.response.MultiInterestResponse;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+@RestController
+public class InterestQueryApi {
+
+    private final GetInterestsService getInterestsService;
+
+    public InterestQueryApi(final GetInterestsService getInterestsService) {
+        this.getInterestsService = getInterestsService;
+    }
+
+    @GetMapping("/interest")
+    public ResponseEntity<MultiInterestResponse> getInterests() {
+        final MultiInterestResponse response = getInterestsService.invoke();
+        return ResponseEntity.ok(response);
+    }
+}