content: package org.ruoyi.system.service.impl;
  
  import cn.hutool.core.collection.CollUtil;
  import cn.hutool.core.convert.Convert;
  import cn.hutool.core.lang.tree.Tree;
  import cn.hutool.core.util.ObjectUtil;
  import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
  import com.baomidou.mybatisplus.core.conditions.update.LambdaUpdateWrapper;
  import com.baomidou.mybatisplus.core.toolkit.Wrappers;
  import lombok.RequiredArgsConstructor;
  import org.ruoyi.common.core.constant.CacheNames;
  import org.ruoyi.common.core.constant.UserConstants;
  import org.ruoyi.common.core.exception.ServiceException;
  import org.ruoyi.common.core.service.DeptService;
  import org.ruoyi.common.core.utils.MapstructUtils;
  import org.ruoyi.common.core.utils.SpringUtils;
  import org.ruoyi.common.core.utils.StringUtils;
  import org.ruoyi.common.core.utils.TreeBuildUtils;
  import org.ruoyi.common.redis.utils.CacheUtils;
  import org.ruoyi.common.satoken.utils.LoginHelper;
  import org.ruoyi.helper.DataBaseHelper;
  import org.ruoyi.system.domain.SysDept;
  import org.ruoyi.system.domain.SysRole;
  import org.ruoyi.system.domain.SysUser;
  import org.ruoyi.system.domain.bo.SysDeptBo;
  import org.ruoyi.system.domain.vo.SysDeptVo;
  import org.ruoyi.system.mapper.SysDeptMapper;
  import org.ruoyi.system.mapper.SysRoleMapper;
  import org.ruoyi.system.mapper.SysUserMapper;
  import org.ruoyi.system.service.ISysDeptService;
  import org.springframework.cache.annotation.CacheEvict;
  import org.springframework.cache.annotation.Cacheable;
  import org.springframework.stereotype.Service;
  
  import java.util.ArrayList;
  import java.util.Arrays;
  import java.util.List;
  
  /**
   * 部门管理 服务实现
   *
   * @author Lion Li
   */
  @RequiredArgsConstructor
  @Service
  public class SysDeptServiceImpl implements ISysDeptService, DeptService {
  
      private final SysDeptMapper baseMapper;
      private final SysRoleMapper roleMapper;
      private final SysUserMapper userMapper;
  
      /**
       * 查询部门管理数据
       *
       * @param dept 部门信息
       * @return 部门信息集合
       */
      @Override
      public List<SysDeptVo> selectDeptList(SysDeptBo dept) {
          LambdaQueryWrapper<SysDept> lqw = buildQueryWrapper(dept);
          return baseMapper.selectDeptList(lqw);
      }
  
      /**
       * 查询部门树结构信息
       *
       * @param bo 部门信息
       * @return 部门树信息集合
       */
      @Override
      public List<Tree<Long>> selectDeptTreeList(SysDeptBo bo) {
          LambdaQueryWrapper<SysDept> lqw = buildQueryWrapper(bo);
          List<SysDept> depts = baseMapper.selectList(lqw);
          return buildDeptTreeSelect(depts);
      }
  
      private LambdaQueryWrapper<SysDept> buildQueryWrapper(SysDeptBo bo) {
          LambdaQueryWrapper<SysDept> lqw = Wrappers.lambdaQuery();
          lqw.eq(SysDept::getDelFlag, "0");
          lqw.eq(ObjectUtil.isNotNull(bo.getDeptId()), SysDept::getDeptId, bo.getDeptId());
          lqw.eq(ObjectUtil.isNotNull(bo.getParentId()), SysDept::getParentId, bo.getParentId());
          lqw.like(StringUtils.isNotBlank(bo.getDeptName()), SysDept::getDeptName, bo.getDeptName());
          lqw.eq(StringUtils.isNotBlank(bo.getStatus()), SysDept::getStatus, bo.getStatus());
          lqw.orderByAsc(SysDept::getParentId);
          lqw.orderByAsc(SysDept::getOrderNum);
          return lqw;
      }
  
      /**
       * 构建前端所需要下拉树结构
       *
       * @param depts 部门列表
       * @return 下拉树结构列表
       */
      @Override
      public List<Tree<Long>> buildDeptTreeSelect(List<SysDept> depts) {
          if (CollUtil.isEmpty(depts)) {
              return CollUtil.newArrayList();
          }
          return TreeBuildUtils.build(depts, (dept, tree) ->
              tree.setId(dept.getDeptId())
                  .setParentId(dept.getParentId())
                  .setName(dept.getDeptName())
                  .setWeight(dept.getOrderNum()));
      }
  
      /**
       * 根据角色ID查询部门树信息
       *
       * @param roleId 角色ID
       * @return 选中部门列表
       */
      @Override
      public List<Long> selectDeptListByRoleId(Long roleId) {
          SysRole role = roleMapper.selectById(roleId);
          return baseMapper.selectDeptListByRoleId(roleId, role.getDeptCheckStrictly());
      }
  
      /**
       * 根据部门ID查询信息
       *
       * @param deptId 部门ID
       * @return 部门信息
       */
      @Cacheable(cacheNames = CacheNames.SYS_DEPT, key = "#deptId")
      @Override
      public SysDeptVo selectDeptById(Long deptId) {
          SysDeptVo dept = baseMapper.selectVoById(deptId);
          if (ObjectUtil.isNull(dept)) {
              return null;
          }
          SysDeptVo parentDept = baseMapper.selectVoOne(new LambdaQueryWrapper<SysDept>()
              .select(SysDept::getDeptName).eq(SysDept::getDeptId, dept.getParentId()));
          dept.setParentName(ObjectUtil.isNotNull(parentDept) ? parentDept.getDeptName() : null);
          return dept;
      }
  
      /**
       * 通过部门ID查询部门名称
       *
       * @param deptIds 部门ID串逗号分隔
       * @return 部门名称串逗号分隔
       */
      @Override
      public String selectDeptNameByIds(String deptIds) {
          List<String> list = new ArrayList<>();
          for (Long id : StringUtils.splitTo(deptIds, Convert::toLong)) {
              SysDeptVo vo = SpringUtils.getAopProxy(this).selectDeptById(id);
              if (ObjectUtil.isNotNull(vo)) {
                  list.add(vo.getDeptName());
              }
          }
          return String.join(StringUtils.SEPARATOR, list);
      }
  
      /**
       * 根据ID查询所有子部门数（正常状态）
       *
       * @param deptId 部门ID
       * @return 子部门数
       */
      @Override
      public long selectNormalChildrenDeptById(Long deptId) {
          return baseMapper.selectCount(new LambdaQueryWrapper<SysDept>()
              .eq(SysDept::getStatus, UserConstants.DEPT_NORMAL)
              .apply(DataBaseHelper.findInSet(deptId, "ancestors")));
      }
  
      /**
       * 是否存在子节点
       *
       * @param deptId 部门ID
       * @return 结果
       */
      @Override
      public boolean hasChildByDeptId(Long deptId) {
          return baseMapper.exists(new LambdaQueryWrapper<SysDept>()
              .eq(SysDept::getParentId, deptId));
      }
  
      /**
       * 查询部门是否存在用户
       *
       * @param deptId 部门ID
       * @return 结果 true 存在 false 不存在
       */
      @Override
      public boolean checkDeptExistUser(Long deptId) {
          return userMapper.exists(new LambdaQueryWrapper<SysUser>()
              .eq(SysUser::getDeptId, deptId));
      }
  
      /**
       * 校验部门名称是否唯一
       *
       * @param dept 部门信息
       * @return 结果
       */
      @Override
      public boolean checkDeptNameUnique(SysDeptBo dept) {
          boolean exist = baseMapper.exists(new LambdaQueryWrapper<SysDept>()
              .eq(SysDept::getDeptName, dept.getDeptName())
              .eq(SysDept::getParentId, dept.getParentId())
              .ne(ObjectUtil.isNotNull(dept.getDeptId()), SysDept::getDeptId, dept.getDeptId()));
          return !exist;
      }
  
      /**
       * 校验部门是否有数据权限
       *
       * @param deptId 部门id
       */
      @Override
      public void checkDeptDataScope(Long deptId) {
          if (ObjectUtil.isNull(deptId)) {
              return;
          }
          if (LoginHelper.isSuperAdmin()) {
              return;
          }
          SysDeptVo dept = baseMapper.selectDeptById(deptId);
          if (ObjectUtil.isNull(dept)) {
              throw new ServiceException("没有权限访问部门数据！");
          }
      }
  
      /**
       * 新增保存部门信息
       *
       * @param bo 部门信息
       * @return 结果
       */
      @Override
      public int insertDept(SysDeptBo bo) {
          SysDept info = baseMapper.selectById(bo.getParentId());
          // 如果父节点不为正常状态,则不允许新增子节点
          if (!UserConstants.DEPT_NORMAL.equals(info.getStatus())) {
              throw new ServiceException("部门停用，不允许新增");
          }
          SysDept dept = MapstructUtils.convert(bo, SysDept.class);
          dept.setAncestors(info.getAncestors() + StringUtils.SEPARATOR + dept.getParentId());
          return baseMapper.insert(dept);
      }
  
      /**
       * 修改保存部门信息
       *
       * @param bo 部门信息
       * @return 结果
       */
      @CacheEvict(cacheNames = CacheNames.SYS_DEPT, key = "#bo.deptId")
      @Override
      public int updateDept(SysDeptBo bo) {
          SysDept dept = MapstructUtils.convert(bo, SysDept.class);
          SysDept oldDept = baseMapper.selectById(dept.getDeptId());
          if (!oldDept.getParentId().equals(dept.getParentId())) {
              // 如果是新父部门 则校验是否具有新父部门权限 避免越权
              this.checkDeptDataScope(dept.getParentId());
              SysDept newParentDept = baseMapper.selectById(dept.getParentId());
              if (ObjectUtil.isNotNull(newParentDept) && ObjectUtil.isNotNull(oldDept)) {
                  String newAncestors = newParentDept.getAncestors() + StringUtils.SEPARATOR + newParentDept.getDeptId();
                  String oldAncestors = oldDept.getAncestors();
                  dept.setAncestors(newAncestors);
                  updateDeptChildren(dept.getDeptId(), newAncestors, oldAncestors);
              }
          }
          int result = baseMapper.updateById(dept);
          if (UserConstants.DEPT_NORMAL.equals(dept.getStatus()) && StringUtils.isNotEmpty(dept.getAncestors())
              && !StringUtils.equals(UserConstants.DEPT_NORMAL, dept.getAncestors())) {
              // 如果该部门是启用状态，则启用该部门的所有上级部门
              updateParentDeptStatusNormal(dept);
          }
          return result;
      }
  
      /**
       * 修改该部门的父级部门状态
       *
       * @param dept 当前部门
       */
      private void updateParentDeptStatusNormal(SysDept dept) {
          String ancestors = dept.getAncestors();
          Long[] deptIds = Convert.toLongArray(ancestors);
          baseMapper.update(null, new LambdaUpdateWrapper<SysDept>()
              .set(SysDept::getStatus, UserConstants.DEPT_NORMAL)
              .in(SysDept::getDeptId, Arrays.asList(deptIds)));
      }
  
      /**
       * 修改子元素关系
       *
       * @param deptId       被修改的部门ID
       * @param newAncestors 新的父ID集合
       * @param oldAncestors 旧的父ID集合
       */
      private void updateDeptChildren(Long deptId, String newAncestors, String oldAncestors) {
          List<SysDept> children = baseMapper.selectList(new LambdaQueryWrapper<SysDept>()
              .apply(DataBaseHelper.findInSet(deptId, "ancestors")));
          List<SysDept> list = new ArrayList<>();
          for (SysDept child : children) {
              SysDept dept = new SysDept();
              dept.setDeptId(child.getDeptId());
              dept.setAncestors(child.getAncestors().replaceFirst(oldAncestors, newAncestors));
              list.add(dept);
          }
          if (CollUtil.isNotEmpty(list)) {
              if (baseMapper.updateBatchById(list)) {
                  list.forEach(dept -> CacheUtils.evict(CacheNames.SYS_DEPT, dept.getDeptId()));
              }
          }
      }
  
      /**
       * 删除部门管理信息
       *
       * @param deptId 部门ID
       * @return 结果
       */
      @CacheEvict(cacheNames = CacheNames.SYS_DEPT, key = "#deptId")
      @Override
      public int deleteDeptById(Long deptId) {
          return baseMapper.deleteById(deptId);
      }
  
  }
  