[ADD] 인덱스 추가,수정,삭제 시 형제 인덱스들 order 자동 업데이트 구현

docs-back/src/main/java/com/vazil/vridge/docs/repository/GuideIndexRepository.java

@@ -11,6 +11,7 @@ import java.util.List;
 public interface GuideIndexRepository extends CrudRepository<GuideIndex, String> {
     List<GuideIndex> findAll();
     List<GuideIndex> findAllByOrderByOrder();
+    List<GuideIndex> findAllByDepthOrderByOrder(Integer depth);
     List<GuideIndex> findAllByPathContainingAndDepth(String path, Integer depth);
     List<GuideIndex> findAllByPathContainingAndDepthOrderByOrderDesc(String path, Integer depth);
     GuideIndex findByPath(String path);

docs-back/src/main/java/com/vazil/vridge/docs/service/GuideIndexService.java

@@ -16,7 +16,6 @@ import java.util.NoSuchElementException;
 @Log4j2
 public class GuideIndexService {
     GuideIndexRepository repository;
-    GuideTestRepository testRepository;
 
     @Transactional
     public GuideIndex getById(String id) throws Exception{
@@ -100,7 +99,7 @@ public class GuideIndexService {
 
     @Transactional
     public GuideIndex create(GuideIndex index) throws Exception{
-        // todo : 기존 인덱스와 위치가 중복될 경우, 기존 인덱스들 order + 1
+        autoUpdateOrder(index, 1);
 
         index.setLike(0);
         index.setView(0);
@@ -112,8 +111,8 @@ public class GuideIndexService {
     public GuideIndex update(GuideIndex index) throws Exception{
         GuideIndex db = repository.findById(index.getId()).orElseThrow(NoSuchElementException::new);
 
-        // todo : 기존 인덱스와 위치가 중복될 경우, 기존 인덱스들 order + 1
-
+        autoUpdateOrder(db, -1);
+        autoUpdateOrder(index, 1);
 
         db.setLocale(index.getLocale());
         db.setTitle(index.getTitle());
@@ -127,7 +126,63 @@ public class GuideIndexService {
     @Transactional
     public String delete(String id) throws Exception{
         GuideIndex db = repository.findById(id).orElseThrow(NoSuchElementException::new);
+        autoUpdateOrder(db, -1);
         repository.delete(db);
         return db.getId();
     }
+
+
+    // targetIndex의 형제들 order 업데이트
+    @Transactional
+    public void autoUpdateOrder(GuideIndex targetIndex, Integer type) throws Exception {
+        String path = targetIndex.getPath();
+        String parentPath = path.substring(0, path.lastIndexOf("/", path.length() -2) + 1);
+
+        // 인덱스 증가해야 할 경우 (type == 1)
+        if(type == 1){
+            if(targetIndex.getDepth() == 1){
+                List<GuideIndex> siblings = repository.findAllByDepthOrderByOrder(1);
+                siblings.forEach(el -> {
+                    if(el.getOrder() >= targetIndex.getOrder()){
+                        el.setOrder(el.getOrder() + 1);
+                        repository.save(el);
+                    }
+                });
+            } else {
+                List<GuideIndex> siblings = repository.findAllByPathContainingAndDepth(parentPath, targetIndex.getDepth());
+                siblings.forEach(el -> {
+                    if(el.getOrder() >= targetIndex.getOrder()){
+                        el.setOrder(el.getOrder() + 1);
+                        repository.save(el);
+                    }
+                });
+            }
+            return ;
+        }
+
+
+        // 인덱스 감소해야 할 경우 (type == -1)
+        if(type == -1){
+            if(targetIndex.getDepth() == 1){
+                List<GuideIndex> siblings = repository.findAllByDepthOrderByOrder(1);
+                siblings.forEach(el -> {
+                    if(el.getOrder() > targetIndex.getOrder()){
+                        el.setOrder(el.getOrder() - 1);
+                        repository.save(el);
+                    }
+                });
+            } else {
+                List<GuideIndex> siblings = repository.findAllByPathContainingAndDepth(parentPath, targetIndex.getDepth());
+                siblings.forEach(el -> {
+                    if(el.getOrder() > targetIndex.getOrder()){
+                        el.setOrder(el.getOrder() - 1);
+                        repository.save(el);
+                    }
+                });
+            }
+            return ;
+        }
+
+        log.info("type 파라미터가 부적절합니다.");
+    }
 }