SystemTypeRepositoryCustom

package com.lgcns.esg.repository.system.Custom;
import com.lgcns.esg.model.response.system.PageResult;
import com.querydsl.core.BooleanBuilder;
import com.querydsl.core.types.Projections;
import com.querydsl.core.types.dsl.PathBuilderFactory;
import com.querydsl.jpa.impl.JPAQuery;
import jakarta.persistence.EntityManager;
import jakarta.persistence.PersistenceContext;
import com.lgcns.esg.model.request.system.SearchSystemTypeRequest;
import com.lgcns.esg.model.response.system.SystemTypeResponse;
import lombok.RequiredArgsConstructor;
import org.springframework.data.domain.Pageable;
import org.springframework.data.jpa.repository.support.Querydsl;
import org.springframework.stereotype.Repository;

import java.util.List;


import static com.lgcns.esg.core.util.QueryBuilder.LIKE;
import static com.lgcns.esg.core.util.QueryBuilder.buildSearchPredicate;

@Repository
    @RequiredArgsConstructor
    public class SystemTypeRepositoryCustom {
        @PersistenceContext
        private final EntityManager entityManager;

        private static final QSystemType qSystemType = QSystemType.systemType;


        public PageResult<SystemTypeResponse> searchSystemType(SearchSystemTypeRequest request, Pageable pageable) {
            Querydsl querydsl = new Querydsl(entityManager, (new PathBuilderFactory().create(SystemTypeResponse.class)));
            JPAQuery<SystemTypeResponse> query = new JPAQuery<>(entityManager);
            BooleanBuilder conditions = new BooleanBuilder();
            query.select(Projections.bean(SystemTypeResponse.class, qSystemType.id, qSystemType.code, qSystemType.name)).from(qSystemType);
            conditions.and(qSystemType.isDeleted.eq(false));
            buildSearchPredicate(conditions, LIKE, qSystemType.code, request.getSystemTypeCode());
            buildSearchPredicate(conditions, LIKE, qSystemType.name, request.getSystemTypeName());
            query.where(conditions).orderBy(qSystemType.createAt.desc()).distinct();
            List<SystemTypeResponse> responses = querydsl.applyPagination(pageable, query).fetch();
            int count = (int)query.fetchCount();
            return new PageResult<>(count, responses);
        }
    }
}