package cn.stylefeng.roses.kernel.db.api.factory;
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import cn.hutool.core.util.ObjectUtil;
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import cn.stylefeng.roses.kernel.rule.pojo.request.BasePageRequest;
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import cn.stylefeng.roses.kernel.rule.pojo.request.BaseRequest;
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import cn.stylefeng.roses.kernel.rule.util.HttpServletUtil;
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import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
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import javax.servlet.http.HttpServletRequest;
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/**
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* 分页参数快速获取
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*
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* @author fengshuonan
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* @date 2020/10/17 17:33
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*/
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public class PageFactory {
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/**
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* 每页大小（默认20）
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*/
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private static final String PAGE_SIZE_PARAM_NAME = "pageSize";
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/**
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* 第几页（从1开始）
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*/
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private static final String PAGE_NO_PARAM_NAME = "pageNo";
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/**
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* 默认分页，在使用时PageFactory.defaultPage会自动获取pageSize和pageNo参数
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*
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* @author fengshuonan
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* @date 2020/3/30 16:42
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*/
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public static <T> Page<T> defaultPage() {
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int pageSize = 20;
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int pageNo = 1;
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HttpServletRequest request = HttpServletUtil.getRequest();
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//每页条数
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String pageSizeString = request.getParameter(PAGE_SIZE_PARAM_NAME);
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if (ObjectUtil.isNotEmpty(pageSizeString)) {
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pageSize = Integer.parseInt(pageSizeString);
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}
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//第几页
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String pageNoString = request.getParameter(PAGE_NO_PARAM_NAME);
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if (ObjectUtil.isNotEmpty(pageNoString)) {
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pageNo = Integer.parseInt(pageNoString);
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}
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return new Page<>(pageNo, pageSize);
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}
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/**
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* 从baseRequest中获取分页参数
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*
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* @author fengshuonan
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* @date 2021/10/19 16:05
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*/
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public static <T> Page<T> defaultPage(BaseRequest baseRequest) {
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int pageSize = 20;
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int pageNo = 1;
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if (ObjectUtil.isNotEmpty(baseRequest)) {
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pageNo = baseRequest.getPageNo() == null ? pageNo : baseRequest.getPageNo();
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pageSize = baseRequest.getPageSize() == null ? pageSize : baseRequest.getPageSize();
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}
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return new Page<>(pageNo, pageSize);
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}
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public static <T> Page<T> defaultPage(BasePageRequest baseRequest) {
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int pageSize = 20;
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int pageNo = 1;
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if (ObjectUtil.isNotEmpty(baseRequest)) {
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pageNo = baseRequest.getPageNo() == null ? pageNo : baseRequest.getPageNo();
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pageSize = baseRequest.getPageSize() == null ? pageSize : baseRequest.getPageSize();
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}
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return new Page<>(pageNo, pageSize);
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}
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public static <T> Page<T> page(Integer pageNo, Integer pageSize) {
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return new Page<>(pageNo == null ? 1 : pageNo, pageSize == null ? 20 : pageSize);
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}
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}
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