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@ -2,9 +2,13 @@ package com.ibeetl.jlw.service;
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import cn.hutool.core.bean.BeanUtil;
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import cn.hutool.core.bean.copier.CopyOptions;
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import cn.hutool.core.collection.CollectionUtil;
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import cn.hutool.core.lang.Assert;
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import cn.hutool.core.map.MapUtil;
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import cn.hutool.core.util.ArrayUtil;
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import cn.hutool.core.util.NumberUtil;
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import cn.hutool.core.util.ObjectUtil;
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import cn.hutool.core.util.RandomUtil;
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import cn.jlw.util.ToolUtils;
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import com.alibaba.fastjson.JSON;
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import com.alibaba.fastjson.JSONObject;
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@ -18,6 +22,7 @@ import com.ibeetl.jlw.entity.CourseInfo;
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import com.ibeetl.jlw.entity.FileEntity;
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import com.ibeetl.jlw.entity.ResourcesInfo;
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import com.ibeetl.jlw.entity.TeacherOpenCourseMergeResourcesInfo;
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import com.ibeetl.jlw.enums.MoveEnum;
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import com.ibeetl.jlw.web.query.ResourcesInfoQuery;
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import com.ibeetl.jlw.web.query.TeacherOpenCourseMergeResourcesInfoQuery;
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import lombok.extern.slf4j.Slf4j;
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@ -38,9 +43,14 @@ import javax.annotation.Nullable;
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import javax.validation.constraints.NotBlank;
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import javax.validation.constraints.NotNull;
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import java.io.*;
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import java.math.BigDecimal;
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import java.math.RoundingMode;
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import java.util.*;
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import static cn.hutool.core.util.ObjectUtil.defaultIfNull;
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import static com.ibeetl.admin.core.util.ExcelUtil.getCellFormatValue;
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import static java.lang.Math.min;
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import static java.math.BigDecimal.ROUND_HALF_UP;
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import static java.util.stream.Collectors.joining;
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import static java.util.stream.Collectors.toSet;
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import static org.apache.commons.lang3.StringUtils.join;
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@ -447,4 +457,195 @@ public class TeacherOpenCourseMergeResourcesInfoService extends CoreBaseService<
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}
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}
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}
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/**
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* 位置移动
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* 小于0的数字，是代表置顶。大于0代表非置顶
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* @param id
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* @param moveType
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*/
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public void move(@NotNull(message = "ID不能为空！") Long id, @NotNull(message = "移动类型不能为空！") MoveEnum moveType) {
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List<TeacherOpenCourseMergeResourcesInfo> links = teacherOpenCourseMergeResourcesInfoDao.getByIds(id.toString());
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Assert.notEmpty(links, "未查询到要移动的元素！");
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TeacherOpenCourseMergeResourcesInfo mergeCourseInfo = links.get(0);
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// 定义排序值
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Double calcedOrder = null;
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switch (moveType) {
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case MOVE_TOP: {
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List<TeacherOpenCourseMergeResourcesInfo> result = teacherOpenCourseMergeResourcesInfoDao.createLambdaQuery()
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.andEq(TeacherOpenCourseMergeResourcesInfo::getResourcesInfoStatus, 1)
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.andEq(TeacherOpenCourseMergeResourcesInfo::getTeacherOpenCourseMergeCourseInfoId, mergeCourseInfo.getTeacherOpenCourseMergeCourseInfoId())
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.asc(TeacherOpenCourseMergeResourcesInfo::getOrderIndex)
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.limit(1, 1)
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.select(TeacherOpenCourseMergeResourcesInfo::getOrderIndex);
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if (CollectionUtil.isNotEmpty(result)) {
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TeacherOpenCourseMergeResourcesInfo minOrderClientLink = result.get(0);
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// 最小的排序值
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BigDecimal minLinkOrder = minOrderClientLink.getOrderIndex();
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// 置顶就现有的最小值减1。但是需要确保结果小于0
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calcedOrder = NumberUtil.sub(min(minLinkOrder.floatValue(), 0), 1);
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}
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} break;
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case MOVE_LEFT: {
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List<TeacherOpenCourseMergeResourcesInfo> result = teacherOpenCourseMergeResourcesInfoDao.createLambdaQuery()
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.andEq(TeacherOpenCourseMergeResourcesInfo::getResourcesInfoStatus, 1)
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.andNotEq(TeacherOpenCourseMergeResourcesInfo::getTeacherOpenCourseMergeResourcesInfoId, mergeCourseInfo.getTeacherOpenCourseMergeResourcesInfoId())
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.andEq(TeacherOpenCourseMergeResourcesInfo::getTeacherOpenCourseMergeCourseInfoId, mergeCourseInfo.getTeacherOpenCourseMergeCourseInfoId())
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.andLess(TeacherOpenCourseMergeResourcesInfo::getOrderIndex, mergeCourseInfo.getOrderIndex())
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.andEq(TeacherOpenCourseMergeResourcesInfo::getResourcesInfoStatus, 1)
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.desc(TeacherOpenCourseMergeResourcesInfo::getOrderIndex)
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.limit(1, 2)
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.select(TeacherOpenCourseMergeResourcesInfo::getOrderIndex);
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if (CollectionUtil.isNotEmpty(result)) {
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// 找到应该安插的位置
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BigDecimal LinkOrder0 = result.get(0).getOrderIndex();
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BigDecimal LinkOrder1 = LinkOrder0.subtract(BigDecimal.ONE);
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if (result.size() == 2) {
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LinkOrder1 = result.get(1).getOrderIndex();
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}
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BigDecimal min = NumberUtil.min(LinkOrder0, LinkOrder1);
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BigDecimal max = NumberUtil.max(LinkOrder0, LinkOrder1);
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// 左移位后的值
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calcedOrder = RandomUtil.randomDouble(min.doubleValue(), max.doubleValue(), 6, RoundingMode.HALF_UP);
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}
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} break;
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case MOVE_RIGHT: {
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List<TeacherOpenCourseMergeResourcesInfo> result = teacherOpenCourseMergeResourcesInfoDao.createLambdaQuery()
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.andGreat(TeacherOpenCourseMergeResourcesInfo::getOrderIndex, mergeCourseInfo.getOrderIndex())
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.andEq(TeacherOpenCourseMergeResourcesInfo::getResourcesInfoStatus, 1)
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.andNotEq(TeacherOpenCourseMergeResourcesInfo::getTeacherOpenCourseMergeResourcesInfoId, mergeCourseInfo.getTeacherOpenCourseMergeResourcesInfoId())
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.andEq(TeacherOpenCourseMergeResourcesInfo::getTeacherOpenCourseMergeCourseInfoId, mergeCourseInfo.getTeacherOpenCourseMergeCourseInfoId())
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.asc(TeacherOpenCourseMergeResourcesInfo::getOrderIndex)
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.limit(1, 2)
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.select(TeacherOpenCourseMergeResourcesInfo::getOrderIndex);
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if (CollectionUtil.isNotEmpty(result)) {
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// 找到应该安插的位置
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BigDecimal LinkOrder0 = result.get(0).getOrderIndex();
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BigDecimal LinkOrder1 = LinkOrder0.add(BigDecimal.ONE);
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if (result.size() == 2) {
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LinkOrder1 = result.get(1).getOrderIndex();
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}
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BigDecimal min = NumberUtil.min(LinkOrder0, LinkOrder1);
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BigDecimal max = NumberUtil.max(LinkOrder0, LinkOrder1);
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// 右移位后的值
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calcedOrder = RandomUtil.randomDouble(min.doubleValue(), max.doubleValue(), 6, RoundingMode.HALF_UP);
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}
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} break;
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default:
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log.error("不支持的移动类型！");
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break;
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}
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if (calcedOrder == null) {
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// 改变排序记录值
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TeacherOpenCourseMergeResourcesInfo updatePO = new TeacherOpenCourseMergeResourcesInfo();
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updatePO.setTeacherOpenCourseMergeCourseInfoId(mergeCourseInfo.getTeacherOpenCourseMergeCourseInfoId());
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updatePO.setOrderIndex(BigDecimal.valueOf(calcedOrder));
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updateTemplate(updatePO);
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}
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}
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/**
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* 功能描述: <br>
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* 拖动
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* 只传左元素ID，表示：拖动元素 在 左元素的左侧；
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* 只传右元素ID，表示：拖动元素 在 右元素的右侧；
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* 左右元素ID都传，则拖动元素放置在两个元素的中间。
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*
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* @param id 拖动元素的ID
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* @param leftId 左元素ID 偏小数值对应的元素ID
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* @param rightId 右元素ID 偏大数值对应的元素ID
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*
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* 左侧（上） ==> 右侧（下）
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* 小数值 ==> 大数值
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*
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* 数值越小，越靠前
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*
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* @Author: 87966
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* @Date: 2023/1/9 16:44
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*/
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public void drag(@NotNull(message = "要移动的元素 ID不能为空！") final Long id, final Long leftId, final Long rightId) {
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// 查询出来所有元素
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List<TeacherOpenCourseMergeResourcesInfo> allElement = teacherOpenCourseMergeResourcesInfoDao.getByIds(ArrayUtil.join(new Long[]{ id, leftId, rightId }, ","));
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// 自身ID是否存在
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boolean hasSelf = allElement.stream().anyMatch(item -> item.getTeacherOpenCourseMergeCourseInfoId().equals(id));
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// 是否有左元素
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boolean hasLeft = allElement.stream().anyMatch(item -> item.getTeacherOpenCourseMergeCourseInfoId().equals(leftId));
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// 是否有元素
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boolean hasRight = allElement.stream().anyMatch(item -> item.getTeacherOpenCourseMergeCourseInfoId().equals(rightId));
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// 断言
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Assert.isTrue(hasSelf, "未查询到要移动的元素！");
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Assert.isFalse(!hasLeft && !hasRight, "左右元素ID不能同时为空！");
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// 自身元素
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TeacherOpenCourseMergeResourcesInfo selfElement = allElement.stream()
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.filter(item -> item.getTeacherOpenCourseMergeResourcesInfoId().equals(id)).findFirst().get();
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// 左侧元素
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TeacherOpenCourseMergeResourcesInfo leftElement = allElement.stream()
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.filter(item -> item.getTeacherOpenCourseMergeResourcesInfoId().equals(leftId)).findFirst().orElse(null);
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// 右侧元素
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TeacherOpenCourseMergeResourcesInfo rightElement = allElement.stream()
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.filter(item -> item.getTeacherOpenCourseMergeResourcesInfoId().equals(rightId)).findFirst().orElse(null);
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// 定义排序值
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BigDecimal clacedOrder = null;
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// 左移动，无法确定右侧边界，适用于置顶
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if (hasLeft && !hasRight) {
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BigDecimal leftOrder = defaultIfNull(leftElement.getOrderIndex(), BigDecimal.ZERO);
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// 数据库里存小数点后六位的排序值
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// 随机取值 0.0001 到 0.0005之间
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BigDecimal randomNum = RandomUtil.randomBigDecimal(new BigDecimal("0.0001"), new BigDecimal("0.0005")).setScale(6, ROUND_HALF_UP);
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// 计算后的排序值
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clacedOrder = leftOrder.subtract(randomNum);
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}
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// 右移动，无法确定左侧边界，适用于置底
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else if (!hasLeft && hasRight) {
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BigDecimal rightOrder = defaultIfNull(rightElement.getOrderIndex(), BigDecimal.ZERO);
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// 数据库里存小数点后六位的排序值
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// 随机取值 0.0001 到 0.0005之间
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BigDecimal randomNum = RandomUtil.randomBigDecimal(new BigDecimal("0.0001"), new BigDecimal("0.0005")).setScale(6, ROUND_HALF_UP);
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// 计算后的排序值
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clacedOrder = rightOrder.add(randomNum);
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}
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// 可以确定左右两侧边界，移动的比较精准
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else if (hasLeft && hasRight) {
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BigDecimal leftOrder = defaultIfNull(leftElement.getOrderIndex(), BigDecimal.ZERO);
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BigDecimal rightOrder = defaultIfNull(rightElement.getOrderIndex(), BigDecimal.ONE);
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// 随机取值
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BigDecimal randomNum = RandomUtil.randomBigDecimal(leftOrder, rightOrder).setScale(6, ROUND_HALF_UP);
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// 计算后的排序值
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clacedOrder = rightOrder.add(randomNum);
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}
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// 最后更新排序值
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if (clacedOrder != null) {
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TeacherOpenCourseMergeResourcesInfo updatePO = new TeacherOpenCourseMergeResourcesInfo();
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updatePO.setTeacherOpenCourseMergeResourcesInfoId(selfElement.getTeacherOpenCourseMergeResourcesInfoId());
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updatePO.setOrderIndex(clacedOrder);
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updateTemplate(updatePO);
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}
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}
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}
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Mlxa0324
2 years ago