콘텐츠 카테고리 만들기, 수정 API

- 카테고리명 검증 추가

src/main/kotlin/kr/co/vividnext/sodalive/content/category/CategoryService.kt

@@ -16,6 +16,7 @@ class CategoryService(
 ) {
     @Transactional
     fun createCategory(request: CreateCategoryRequest, member: Member) {
+        validateTitle(title = request.title)
         val category = repository.findByTitleAndMemberId(title = request.title, memberId = member.id!!)
             ?: repository.save(
                 Category(title = request.title).apply {
@@ -47,6 +48,7 @@ class CategoryService(
             ?: throw SodaException("잘못된 요청입니다.")
 
         if (!request.title.isNullOrBlank()) {
+            validateTitle(title = request.title)
             category.title = request.title
         }
 
@@ -90,4 +92,8 @@ class CategoryService(
 
         return repository.findByCreatorId(creatorId = creatorId)
     }
+
+    private fun validateTitle(title: String) {
+        if (title.length < 2) throw SodaException("카테고리명은 2글자 이상 입력하세요")
+    }
 }