[J2KB-3rd-Season#26]feat: 관심사 생성 기능 추가

src/main/java/com/devin/dev/controller/subject/SubjectController.java

@@ -0,0 +1,25 @@
+package com.devin.dev.controller.subject;
+
+import com.devin.dev.model.DefaultResponse;
+import com.devin.dev.service.SubjectService;
+import lombok.RequiredArgsConstructor;
+import org.springframework.stereotype.Controller;
+import org.springframework.web.bind.annotation.DeleteMapping;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestBody;
+
+import javax.servlet.http.HttpServletRequest;
+
+@Controller
+@RequiredArgsConstructor
+public class SubjectController {
+
+    private final SubjectService subjectService;
+
+    @PostMapping("/tags")
+    public DefaultResponse<?> addSubject(@RequestBody SubjectForm form, HttpServletRequest request) {
+        return subjectService.addSubject(form, request);
+    }
+
+}

src/main/java/com/devin/dev/controller/subject/SubjectForm.java

@@ -0,0 +1,11 @@
+package com.devin.dev.controller.subject;
+
+import lombok.Data;
+
+import java.util.List;
+
+@Data
+public class SubjectForm {
+
+    private List<String> subjects;
+}

src/main/java/com/devin/dev/service/SubjectService.java

@@ -1,21 +1,60 @@
 package com.devin.dev.service;
 
+import com.devin.dev.controller.subject.SubjectForm;
 import com.devin.dev.entity.post.Subject;
+import com.devin.dev.entity.user.User;
+import com.devin.dev.entity.user.UserStatus;
 import com.devin.dev.model.DefaultResponse;
+import com.devin.dev.repository.post.PostTagRepository;
 import com.devin.dev.repository.subject.SubjectRepository;
+import com.devin.dev.repository.user.UserInterestRepository;
+import com.devin.dev.repository.user.UserRepository;
+import com.devin.dev.security.JwtAuthTokenProvider;
 import com.devin.dev.utils.ResponseMessage;
 import com.devin.dev.utils.StatusCode;
 import lombok.RequiredArgsConstructor;
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
 
+import javax.servlet.http.HttpServletRequest;
+import java.util.List;
 import java.util.Optional;
+import java.util.stream.Collectors;
 
 @Service
 @RequiredArgsConstructor
 public class SubjectService {
 
     private final SubjectRepository subjectRepository;
+    private final PostTagRepository postTagRepository;
+    private final UserRepository userRepository;
+    private final UserInterestRepository userInterestRepository;
+    private final JwtAuthTokenProvider tokenProvider;
+
+    @Transactional
+    public DefaultResponse<?> addSubject(SubjectForm form, HttpServletRequest request) {
+        String token = tokenProvider.parseToken(request);
+        Long userId;
+        if (tokenProvider.validateToken(token)) {
+            userId = tokenProvider.getUserId(token);
+        } else {
+            return new DefaultResponse<>(StatusCode.FAIL_AUTH, ResponseMessage.NOT_FOUND_USER);
+        }
+        Optional<User> userOptional = userRepository.findById(userId);
+        if (userOptional.isEmpty()) {
+            return new DefaultResponse<>(StatusCode.NOT_EXIST, ResponseMessage.NOT_FOUND_USER);
+        }
+        User user = userOptional.get();
+
+        if (user.getStatus() != UserStatus.ADMIN) {
+            return new DefaultResponse<>(StatusCode.CONDITION_FAIL, ResponseMessage.NO_AUTHORITY);
+        }
+
+        List<Subject> subjects = form.getSubjects().stream().map(Subject::new).collect(Collectors.toList());
+        subjectRepository.saveAll(subjects);
+
+        return new DefaultResponse<>(StatusCode.SUCCESS, ResponseMessage.CREATED_SUBJECT);
+    }
 
     @Transactional
     public DefaultResponse<?> addSubject(String name) {