feature: 글 검색 api 구현 (#37)

* feature: 글 검색 api 구현

* feature: 글 검색 api 피드백 반영

* feature: 글 검색 api 피드백 2번째 반영

src/main/java/com/goldbalance/dive/domain/article/controller/ArticleController.java

@@ -1,3 +1,22 @@
 package com.goldbalance.dive.domain.article.controller;
 
-public class ArticleController {}
+import com.goldbalance.dive.domain.article.domain.Article;
+import com.goldbalance.dive.domain.article.domain.ArticleQueryOption;
+import com.goldbalance.dive.domain.article.service.ArticleService;
+import java.util.List;
+import lombok.RequiredArgsConstructor;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.*;
+
+@RestController
+@RequestMapping("/articles")
+@RequiredArgsConstructor
+public class ArticleController {
+    private final ArticleService articleService;
+
+    @GetMapping
+    public ResponseEntity<List<Article>> findArticles(@RequestParam ArticleQueryOption queryOption) {
+        List<Article> response = articleService.findArticles(queryOption);
+        return ResponseEntity.ok(response);
+    }
+}

src/main/java/com/goldbalance/dive/domain/article/domain/ArticleQueryOption.java

@@ -0,0 +1,3 @@
+package com.goldbalance.dive.domain.article.domain;
+
+public record ArticleQueryOption(String keyword, Category category, Duration duration) {}

src/main/java/com/goldbalance/dive/domain/article/repository/ArticleCustomRepository.java

@@ -0,0 +1,11 @@
+package com.goldbalance.dive.domain.article.repository;
+
+import com.goldbalance.dive.domain.article.domain.Article;
+import com.goldbalance.dive.domain.article.domain.ArticleQueryOption;
+import com.querydsl.core.types.dsl.BooleanExpression;
+import java.util.List;
+
+public interface ArticleCustomRepository {
+
+    List<Article> searchArticle(ArticleQueryOption queryOption);
+}

src/main/java/com/goldbalance/dive/domain/article/repository/ArticleCustomRepositoryImpl.java

@@ -0,0 +1,28 @@
+package com.goldbalance.dive.domain.article.repository;
+
+import static com.goldbalance.dive.domain.article.domain.QArticle.*;
+
+import com.goldbalance.dive.domain.article.domain.Article;
+import com.goldbalance.dive.domain.article.domain.ArticleQueryOption;
+import com.querydsl.core.types.dsl.BooleanExpression;
+import com.querydsl.jpa.impl.JPAQueryFactory;
+import java.util.List;
+import lombok.RequiredArgsConstructor;
+
+@RequiredArgsConstructor
+public class ArticleCustomRepositoryImpl implements ArticleCustomRepository {
+
+    private final JPAQueryFactory queryFactory;
+
+    @Override
+    public List<Article> searchArticle(ArticleQueryOption queryOption) {
+        return queryFactory
+                .selectFrom(article)
+                .where(containsKeyword(queryOption))
+                .fetch();
+    }
+
+    private BooleanExpression containsKeyword(ArticleQueryOption queryOption) {
+        return queryOption.keyword() != null ? article.title.containsIgnoreCase(queryOption.keyword()) : null;
+    }
+}

src/main/java/com/goldbalance/dive/domain/article/repository/ArticleRepository.java

@@ -3,4 +3,4 @@
 import com.goldbalance.dive.domain.article.domain.Article;
 import org.springframework.data.jpa.repository.JpaRepository;
 
-public interface ArticleRepository extends JpaRepository<Article, Long> {}
+public interface ArticleRepository extends JpaRepository<Article, Long>, ArticleCustomRepository {}

src/main/java/com/goldbalance/dive/domain/article/service/ArticleService.java

@@ -1,3 +1,21 @@
 package com.goldbalance.dive.domain.article.service;
 
-public class ArticleService {}
+import com.goldbalance.dive.domain.article.domain.Article;
+import com.goldbalance.dive.domain.article.domain.ArticleQueryOption;
+import com.goldbalance.dive.domain.article.repository.ArticleRepository;
+import jakarta.transaction.Transactional;
+import java.util.List;
+import lombok.RequiredArgsConstructor;
+import org.springframework.stereotype.Service;
+
+@Service
+@RequiredArgsConstructor
+@Transactional
+public class ArticleService {
+
+    private final ArticleRepository articleRepository;
+
+    public List<Article> findArticles(ArticleQueryOption queryOption) {
+        return articleRepository.searchArticle(queryOption);
+    }
+}