Merge pull request #181 from LearnsMate/feature/lecture

feat(#180): 필터 적용한 강의 조회 기능

LearnsMate/src/main/java/intbyte4/learnsmate/lecture/domain/vo/response/ResponseLectureFilterRequestVO.java → LearnsMate/src/main/java/intbyte4/learnsmate/lecture/domain/dto/LectureFilterDTO.java

@@ -1,26 +1,24 @@
-package intbyte4.learnsmate.lecture.domain.vo.response;
+package intbyte4.learnsmate.lecture.domain.dto;
 
 import intbyte4.learnsmate.lecture.enums.LectureLevelEnum;
 import lombok.*;
 
 import java.time.LocalDateTime;
 
 @Getter
-@Setter
+@Builder
+@ToString
 @NoArgsConstructor
 @AllArgsConstructor
-@Builder
-public class ResponseLectureFilterRequestVO {
+public class LectureFilterDTO {
     private Long lectureCode; // 강의 코드
     private String lectureTitle; // 강의명
     private Long tutorCode; // 강사 코드
-    private String tutorName; // 강사 명
+    private String tutorName; // 강사명
     private String lectureCategory; // 강의 카테고리
     private LectureLevelEnum lectureLevel; // 강의 난이도
     private Boolean lectureConfirmStatus; // 강의 계약 상태
     private Boolean lectureStatus; // 강의 상태
-    private Integer minPrice; // 최소 금액
-    private Integer maxPrice; // 최대 금액
-    private LocalDateTime startCreatedAt; // 강의 생성일 시작
-    private LocalDateTime endCreatedAt; // 강의 생성일 끝
+    private Integer price; // 금액
+    private LocalDateTime createdAt; // 강의 생성일
 }

LearnsMate/src/main/java/intbyte4/learnsmate/lecture/domain/vo/request/RequestLectureFilterVO.java

@@ -0,0 +1,31 @@
+package intbyte4.learnsmate.lecture.domain.vo.request;
+
+import com.fasterxml.jackson.databind.PropertyNamingStrategies;
+import com.fasterxml.jackson.databind.annotation.JsonNaming;
+import intbyte4.learnsmate.lecture.enums.LectureLevelEnum;
+import lombok.AllArgsConstructor;
+import lombok.Builder;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+
+import java.time.LocalDateTime;
+
+@NoArgsConstructor
+@AllArgsConstructor
+@Getter
+@Builder
+@JsonNaming(PropertyNamingStrategies.SnakeCaseStrategy.class)
+public class RequestLectureFilterVO {
+    private Long lectureCode; // 강의 코드
+    private String lectureTitle; // 강의명
+    private Long tutorCode; // 강사 코드
+    private String tutorName; // 강사명
+    private String lectureCategoryName; // 강의 카테고리
+    private LectureLevelEnum lectureLevel; // 강의 난이도
+    private Boolean lectureConfirmStatus; // 강의 계약 상태
+    private Boolean lectureStatus; // 강의 상태
+    private Integer minPrice; // 최소 금액
+    private Integer maxPrice; // 최대 금액
+    private LocalDateTime startCreatedAt; // 강의 생성일 시작
+    private LocalDateTime endCreatedAt; // 강의 생성일 끝
+}

LearnsMate/src/main/java/intbyte4/learnsmate/lecture/repository/CustomLectureRepository.java

@@ -1,10 +1,11 @@
 package intbyte4.learnsmate.lecture.repository;
 
+import intbyte4.learnsmate.lecture.domain.dto.LectureFilterDTO;
 import intbyte4.learnsmate.lecture.domain.entity.Lecture;
-import intbyte4.learnsmate.lecture.domain.vo.response.ResponseLectureFilterRequestVO;
+import intbyte4.learnsmate.lecture.domain.vo.request.RequestLectureFilterVO;
 
 import java.util.List;
 
 public interface CustomLectureRepository {
-    List<Lecture> findLecturesByFilters(ResponseLectureFilterRequestVO request);
+    List<LectureFilterDTO> findLecturesByFilters(RequestLectureFilterVO request);
 }

LearnsMate/src/main/java/intbyte4/learnsmate/lecture/repository/CustomLectureRepositoryImpl.java

@@ -1,123 +1,158 @@
 package intbyte4.learnsmate.lecture.repository;
 
 import com.querydsl.core.BooleanBuilder;
+import com.querydsl.core.types.Projections;
+import com.querydsl.core.types.dsl.BooleanExpression;
 import com.querydsl.jpa.impl.JPAQueryFactory;
-import intbyte4.learnsmate.lecture.domain.entity.Lecture;
+import intbyte4.learnsmate.lecture.domain.dto.LectureFilterDTO;
 import intbyte4.learnsmate.lecture.domain.entity.QLecture;
-import intbyte4.learnsmate.lecture.domain.vo.response.ResponseLectureFilterRequestVO;
+import intbyte4.learnsmate.lecture.domain.vo.request.RequestLectureFilterVO;
+import intbyte4.learnsmate.lecture_category.domain.entity.QLectureCategory;
 import intbyte4.learnsmate.lecture_category_by_lecture.domain.entity.QLectureCategoryByLecture;
-import lombok.RequiredArgsConstructor;
+import jakarta.persistence.EntityManager;
 import org.springframework.stereotype.Repository;
 
 import java.util.List;
 
+import static intbyte4.learnsmate.lecture_category.domain.entity.QLectureCategory.lectureCategory;
+
 @Repository
-@RequiredArgsConstructor
 public class CustomLectureRepositoryImpl implements CustomLectureRepository {
 
     private final JPAQueryFactory queryFactory;
-    private final QLecture lecture = QLecture.lecture;
-    private final QLectureCategoryByLecture lectureCategoryByLecture = QLectureCategoryByLecture.lectureCategoryByLecture;
+
+    public CustomLectureRepositoryImpl(EntityManager entityManager) {
+        this.queryFactory = new JPAQueryFactory(entityManager);
+    }
 
     @Override
-    public List<Lecture> findLecturesByFilters(ResponseLectureFilterRequestVO request) {
+    public List<LectureFilterDTO> findLecturesByFilters(RequestLectureFilterVO request) {
+        QLecture lecture = QLecture.lecture;
+        QLectureCategory lectureCategory = QLectureCategory.lectureCategory;
+        QLectureCategoryByLecture lectureCategoryByLecture = QLectureCategoryByLecture.lectureCategoryByLecture;
+
+        BooleanBuilder builder = new BooleanBuilder()
+                .and(eqLectureCode(request))
+                .and(likeLectureTitle(request))
+                .and(eqTutorCode(request))
+                .and(eqTutorName(request))
+                .and(eqLectureCategoryName(request))
+                .and(eqLectureLevel(request))
+                .and(eqLectureConfirmStatus(request))
+                .and(eqLectureStatus(request))
+                .and(betweenLecturePrice(request))
+                .and(betweenCreatedAt(request));
+
         return queryFactory
-                .selectFrom(lecture)
-                .where(
-                        filterByLectureCode(request),
-                        filterByLectureTitle(request),
-                        filterByTutorCode(request),
-                        filterByTutorName(request),
-                        filterByLectureCategory(request),
-                        filterByLectureLevel(request),
-                        filterByLectureConfirmStatus(request),
-                        filterByLectureStatus(request),
-                        filterByPriceRange(request),
-                        filterByCreationDate(request)
-                )
+                .select(Projections.constructor(
+                        LectureFilterDTO.class,
+                        lecture.lectureCode,
+                        lecture.lectureTitle,
+                        lecture.tutor.memberCode,
+                        lecture.tutor.memberName,
+                        lectureCategory.lectureCategoryName,
+                        lecture.lectureLevel,
+                        lecture.lectureConfirmStatus,
+                        lecture.lectureStatus,
+                        lecture.lecturePrice,
+                        lecture.createdAt
+                ))
+                .from(lecture)
+                .join(lectureCategoryByLecture).on(lectureCategoryByLecture.lecture.eq(lecture))
+                .join(lectureCategoryByLecture.lectureCategory, lectureCategory)
+                .where(builder)
                 .fetch();
     }
 
-    private BooleanBuilder filterByLectureCode(ResponseLectureFilterRequestVO request) {
-        BooleanBuilder builder = new BooleanBuilder();
-        if (request.getLectureCode() != null) {
-            builder.and(lecture.lectureCode.eq(request.getLectureCode()));
+    private BooleanExpression eqLectureCode(RequestLectureFilterVO request) {
+
+        if (request.getLectureCode() == null) {
+            return null;
         }
-        return builder;
+        return QLecture.lecture.lectureCode.eq(request.getLectureCode());
     }
 
-    private BooleanBuilder filterByLectureTitle(ResponseLectureFilterRequestVO request) {
-        BooleanBuilder builder = new BooleanBuilder();
-        if (request.getLectureTitle() != null) {
-            builder.and(lecture.lectureTitle.likeIgnoreCase("%" + request.getLectureTitle() + "%"));
+    private BooleanExpression likeLectureTitle(RequestLectureFilterVO request) {
+
+        if (request.getLectureTitle() == null) {
+            return null;
         }
-        return builder;
+        return QLecture.lecture.lectureTitle.likeIgnoreCase("%" + request.getLectureTitle() + "%");
     }
 
-    private BooleanBuilder filterByTutorCode(ResponseLectureFilterRequestVO request) {
-        BooleanBuilder builder = new BooleanBuilder();
-        if (request.getTutorCode() != null) {
-            builder.and(lecture.tutor.memberCode.eq(request.getTutorCode()));
+    private BooleanExpression eqTutorCode(RequestLectureFilterVO request) {
+
+        if (request.getTutorCode() == null) {
+            return null;
         }
-        return builder;
+        return QLecture.lecture.tutor.memberCode.eq(request.getTutorCode());
     }
 
-    private BooleanBuilder filterByTutorName(ResponseLectureFilterRequestVO request) {
-        BooleanBuilder builder = new BooleanBuilder();
-        if (request.getTutorName() != null) {
-            builder.and(lecture.tutor.memberName.likeIgnoreCase("%" + request.getTutorName() + "%"));
+    private BooleanExpression eqTutorName(RequestLectureFilterVO request) {
+
+        if (request.getTutorName() == null) {
+            return null;
         }
-        return builder;
+        return QLecture.lecture.tutor.memberName.eq(request.getTutorName());
     }
 
-    private BooleanBuilder filterByLectureCategory(ResponseLectureFilterRequestVO request) {
-        BooleanBuilder builder = new BooleanBuilder();
-        if (request.getLectureCategory() != null) {
-            builder.and(lectureCategoryByLecture.lectureCategory.lectureCategoryName.eq(request.getLectureCategory()));
+    private BooleanExpression eqLectureCategoryName(RequestLectureFilterVO request) {
+
+        if (request.getLectureCategoryName() == null) {
+            return null;
         }
-        return builder;
+        return lectureCategory.lectureCategoryName.eq(request.getLectureCategoryName());
     }
 
-    private BooleanBuilder filterByLectureLevel(ResponseLectureFilterRequestVO request) {
-        BooleanBuilder builder = new BooleanBuilder();
-        if (request.getLectureLevel() != null) {
-            builder.and(lecture.lectureLevel.eq(request.getLectureLevel()));
+    private BooleanExpression eqLectureLevel(RequestLectureFilterVO request) {
+
+        if (request.getLectureLevel() == null) {
+            return null;
         }
-        return builder;
+        return QLecture.lecture.lectureLevel.eq(request.getLectureLevel());
     }
 
-    private BooleanBuilder filterByLectureConfirmStatus(ResponseLectureFilterRequestVO request) {
-        BooleanBuilder builder = new BooleanBuilder();
-        if (request.getLectureConfirmStatus() != null) {
-            builder.and(lecture.lectureConfirmStatus.eq(request.getLectureConfirmStatus()));
+    private BooleanExpression eqLectureConfirmStatus(RequestLectureFilterVO request) {
+
+        if (request.getLectureConfirmStatus() == null) {
+            return null;
         }
-        return builder;
+        return QLecture.lecture.lectureConfirmStatus.eq(request.getLectureConfirmStatus());
     }
 
-    private BooleanBuilder filterByLectureStatus(ResponseLectureFilterRequestVO request) {
-        BooleanBuilder builder = new BooleanBuilder();
-        if (request.getLectureStatus() != null) {
-            builder.and(lecture.lectureStatus.eq(request.getLectureStatus()));
+    private BooleanExpression eqLectureStatus(RequestLectureFilterVO request) {
+
+        if (request.getLectureStatus() == null) {
+            return null;
         }
-        return builder;
+        return QLecture.lecture.lectureStatus.eq(request.getLectureStatus());
     }
 
-    private BooleanBuilder filterByPriceRange(ResponseLectureFilterRequestVO request) {
-        BooleanBuilder builder = new BooleanBuilder();
-        if (request.getMinPrice() != null && request.getMaxPrice() != null) {
-            builder.and(lecture.lecturePrice.between(request.getMinPrice(), request.getMaxPrice()));
+    private BooleanExpression betweenLecturePrice(RequestLectureFilterVO request) {
+
+        if (request.getMinPrice() == null && request.getMaxPrice() == null) {
+            return null;
         }
-        return builder;
+        if (request.getMinPrice() == null) {
+            return QLecture.lecture.lecturePrice.loe(request.getMaxPrice());
+        }
+        if (request.getMaxPrice() == null) {
+            return QLecture.lecture.lecturePrice.gt(request.getMinPrice());
+        }
+        return QLecture.lecture.lecturePrice.between(request.getMinPrice(), request.getMaxPrice());
     }
 
-    private BooleanBuilder filterByCreationDate(ResponseLectureFilterRequestVO request) {
-        BooleanBuilder builder = new BooleanBuilder();
-        if (request.getStartCreatedAt() != null) {
-            builder.and(lecture.createdAt.goe(request.getStartCreatedAt()));
+    private BooleanExpression betweenCreatedAt(RequestLectureFilterVO request) {
+
+        if (request.getStartCreatedAt() == null && request.getEndCreatedAt() == null) {
+            return null;
+        }
+        if (request.getEndCreatedAt() == null) {
+            return QLecture.lecture.createdAt.gt(request.getStartCreatedAt());
         }
-        if (request.getEndCreatedAt() != null) {
-            builder.and(lecture.createdAt.loe(request.getEndCreatedAt()));
+        if (request.getStartCreatedAt() == null) {
+            return QLecture.lecture.createdAt.lt(request.getEndCreatedAt());
         }
-        return builder;
+        return QLecture.lecture.createdAt.between(request.getStartCreatedAt(), request.getEndCreatedAt());
     }
 }