[Feat] 검색창 기능 구현 (#330)

* work

* refactor: 가격 필터링 로직 할인된가격으로 수정

* work

* work

Author: yeeJin227

src/main/java/com/back/domain/artist/repository/ArtistProfileCustomRepository.java

@@ -0,0 +1,11 @@
+package com.back.domain.artist.repository;
+
+import com.back.domain.artist.entity.ArtistProfile;
+
+import java.util.List;
+
+public interface ArtistProfileCustomRepository {
+
+    // 검색(작가)
+    List<ArtistProfile> searchByArtistName(String keyword);
+}

src/main/java/com/back/domain/artist/repository/ArtistProfileCustomRepositoryImpl.java

@@ -0,0 +1,39 @@
+package com.back.domain.artist.repository;
+
+import com.back.domain.artist.entity.ArtistProfile;
+import com.back.domain.artist.entity.QArtistProfile;
+import com.querydsl.core.BooleanBuilder;
+import com.querydsl.jpa.impl.JPAQueryFactory;
+import lombok.RequiredArgsConstructor;
+import org.springframework.stereotype.Repository;
+import org.springframework.util.StringUtils;
+
+import java.util.List;
+
+@Repository
+@RequiredArgsConstructor
+public class ArtistProfileCustomRepositoryImpl implements ArtistProfileCustomRepository {
+
+    private final JPAQueryFactory queryFactory;
+
+    /**
+     * 검색 키워드(작가 이름)에 해당하는 작가 조회
+     */
+    @Override
+    public List<ArtistProfile> searchByArtistName(String keyword) {
+        QArtistProfile artistProfile = QArtistProfile.artistProfile;
+        BooleanBuilder builder = new BooleanBuilder();
+
+        if (StringUtils.hasText(keyword)) {
+            String[] keywords = keyword.trim().toLowerCase().split("\\s+"); // 키워드 앞뒤 공백 제거, 소문자 변환, 공백 기준으로 분리
+            for (String kw : keywords) {
+                builder.or(artistProfile.artistName.toLowerCase().contains(kw)); // or 조건(여러 키워드 중 하나라도 해당하면 조회)
+            }
+        }
+
+        return queryFactory
+                .selectFrom(artistProfile)
+                .where(builder)
+                .fetch();
+    }
+}

src/main/java/com/back/domain/artist/repository/ArtistProfileRepository.java

@@ -8,7 +8,7 @@
 import java.util.List;
 import java.util.Optional;
 
-public interface ArtistProfileRepository extends JpaRepository<ArtistProfile, Long> {
+public interface ArtistProfileRepository extends JpaRepository<ArtistProfile, Long>, ArtistProfileCustomRepository {
 
     // User ID로 작가 프로필 조회
     Optional<ArtistProfile> findByUserId(Long artistId);

src/main/java/com/back/domain/funding/repository/FundingCustomRepository.java

@@ -5,6 +5,7 @@
 import org.springframework.data.domain.Page;
 import org.springframework.data.domain.Pageable;
 
+import java.util.List;
 import java.util.Set;
 
 public interface FundingCustomRepository {
@@ -25,4 +26,7 @@ Page<Funding> findByFilters(
             Long maxPrice,
             Pageable pageable
     );
+
+    // 검색(펀딩)
+    List<Funding> searchByTitle(String keyword);
 }

src/main/java/com/back/domain/funding/repository/FundingCustomRepositoryImpl.java

@@ -139,4 +139,42 @@ private long countByFilters(
 
         return em.createQuery(countQuery).getSingleResult();
     }
+
+    /**
+     * 검색 키워드(펀딩 제목)에 해당하는 펀딩 조회
+     */
+    @Override
+    public List<Funding> searchByTitle(String keyword) {
+        CriteriaBuilder cb = em.getCriteriaBuilder();
+        CriteriaQuery<Funding> query = cb.createQuery(Funding.class);
+        Root<Funding> funding = query.from(Funding.class);
+
+        List<Predicate> predicates = new ArrayList<>();
+
+        // 키워드 검색 로직
+        if (org.springframework.util.StringUtils.hasText(keyword)) {
+            String[] keywords = keyword.trim().toLowerCase().split("\\s+");// 키워드 앞뒤 공백 제거, 소문자 변환, 공백 기준으로 분리
+            List<Predicate> orPredicates = new ArrayList<>();
+            for (String kw : keywords) {
+                orPredicates.add(cb.like(cb.lower(funding.get("title")), "%" + kw + "%")); // LIKE %keyword%
+            }
+            predicates.add(cb.or(orPredicates.toArray(new Predicate[0])));
+        } else {
+            // 키워드가 없으면 빈 리스트 반환
+            return java.util.Collections.emptyList();
+        }
+
+        // 사용자가 볼 수 있는 상태의 펀딩만 검색
+        predicates.add(funding.get("status").in(
+                com.back.domain.funding.entity.FundingStatus.OPEN,
+                com.back.domain.funding.entity.FundingStatus.APPROVED,
+                com.back.domain.funding.entity.FundingStatus.SUCCESS,
+                com.back.domain.funding.entity.FundingStatus.CLOSED
+        ));
+
+        query.where(predicates.toArray(new Predicate[0]));
+        query.distinct(true);
+
+        return em.createQuery(query).getResultList();
+    }
 }