feat: Profanity 도메인 분리 및 추가(파일, 단일), 삭제, csv 다운 기능 구현

src/main/java/com/spaceclub/global/annotation/profanity/domain/Profanity.java

@@ -0,0 +1,32 @@
+package com.spaceclub.global.annotation.profanity.domain;
+
+import com.spaceclub.global.BaseTimeEntity;
+import jakarta.persistence.Column;
+import jakarta.persistence.Entity;
+import jakarta.persistence.GeneratedValue;
+import jakarta.persistence.GenerationType;
+import jakarta.persistence.Id;
+import lombok.Getter;
+
+@Entity
+@Getter
+public class Profanity extends BaseTimeEntity {
+
+    protected Profanity() {}
+
+    public Profanity(String banWord) {
+        this.banWord = banWord;
+        this.useCount = 0L;
+    }
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    private Long id;
+
+    @Column(nullable = false, unique = true)
+    private String banWord;
+
+    @Column(nullable = false)
+    private long useCount;
+
+}

src/main/java/com/spaceclub/global/annotation/profanity/domain/ProfanityRepository.java

@@ -0,0 +1,11 @@
+package com.spaceclub.global.annotation.profanity.domain;
+
+import org.springframework.data.jpa.repository.JpaRepository;
+
+public interface ProfanityRepository extends JpaRepository<Profanity, Long> {
+
+    boolean existsByBanWord(String word);
+
+    void deleteByBanWord(String word);
+
+}

src/main/java/com/spaceclub/global/annotation/profanity/service/ProfanityService.java

@@ -0,0 +1,77 @@
+package com.spaceclub.global.annotation.profanity.service;
+
+import com.spaceclub.global.annotation.profanity.domain.Profanity;
+import com.spaceclub.global.annotation.profanity.domain.ProfanityRepository;
+import com.spaceclub.global.aws.s3.S3FileUploader;
+import lombok.RequiredArgsConstructor;
+import org.apache.commons.csv.CSVFormat;
+import org.apache.commons.csv.CSVPrinter;
+import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
+import org.springframework.web.multipart.MultipartFile;
+
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStreamReader;
+import java.io.StringWriter;
+import java.util.List;
+
+import static com.spaceclub.global.annotation.profanity.ProfanityExceptionMessage.BAD_WORD_ALREADY_EXISTS;
+import static com.spaceclub.global.annotation.profanity.ProfanityExceptionMessage.FAILED_TO_CREATE_CSV;
+import static com.spaceclub.global.annotation.profanity.ProfanityExceptionMessage.FAILED_TO_SAVE;
+
+@Service
+@RequiredArgsConstructor
+public class ProfanityService {
+
+    private final ProfanityRepository profanityRepository;
+    private final S3FileUploader s3FileUploader;
+
+    public void saveProfanitiesFromFile(MultipartFile file) {
+        try (BufferedReader reader = new BufferedReader(new InputStreamReader(file.getInputStream()))) {
+            List<Profanity> profanities = reader.lines()
+                    .map(Profanity::new)
+                    .toList();
+
+            profanityRepository.saveAllAndFlush(profanities); // 트랜잭션 원자화
+        } catch (IOException e) {
+            throw new IllegalStateException(FAILED_TO_SAVE.getMessage());
+        }
+    }
+
+    @Transactional
+    public void saveProfanity(String word) {
+        if (profanityRepository.existsByBanWord(word)) {
+            throw new IllegalArgumentException(BAD_WORD_ALREADY_EXISTS.getMessage());
+        }
+
+        profanityRepository.save(new Profanity(word));
+    }
+
+    @Transactional
+    public void deleteProfanity(String word) {
+        profanityRepository.deleteByBanWord(word);
+    }
+
+    public String createCsvFile() {
+        List<Profanity> profanities = profanityRepository.findAll();
+
+        CSVFormat csvFormat = CSVFormat.DEFAULT.builder()
+                .setHeader("ID", "금칙어", "사용횟수")
+                .build();
+        try (
+                final StringWriter writer = new StringWriter();
+                final CSVPrinter printer = new CSVPrinter(writer, csvFormat)
+        ) {
+            for (Profanity profanity : profanities) {
+                printer.printRecord(profanity.getId(), profanity.getBanWord(), profanity.getUseCount());
+            }
+            printer.flush();
+
+            return s3FileUploader.uploadProfanityInfo(writer.toString());
+        } catch (IOException e) {
+            throw new IllegalStateException(FAILED_TO_CREATE_CSV.getMessage());
+        }
+    }
+
+}