content: package com.snow.system.service.impl;
  
  import java.util.ArrayList;
  import java.util.Iterator;
  import java.util.List;
  import java.util.stream.Collectors;
  import org.springframework.beans.factory.annotation.Autowired;
  import org.springframework.stereotype.Service;
  import com.snow.common.core.constant.UserConstants;
  import com.snow.common.core.exception.ServiceException;
  import com.snow.common.core.text.Convert;
  import com.snow.common.core.utils.SpringUtils;
  import com.snow.common.core.utils.StringUtils;
  import com.snow.common.datascope.annotation.DataScope;
  import com.snow.common.security.utils.SecurityUtils;
  import com.snow.system.api.domain.SysDept;
  import com.snow.system.api.domain.SysRole;
  import com.snow.system.api.domain.SysUser;
  import com.snow.system.domain.vo.TreeSelect;
  import com.snow.system.mapper.SysDeptMapper;
  import com.snow.system.mapper.SysRoleMapper;
  import com.snow.system.service.ISysDeptService;
  
  /**
   * 部门管理 服务实现
   * 
   * @author snow
   */
  @Service
  public class SysDeptServiceImpl implements ISysDeptService
  {
      @Autowired
      private SysDeptMapper deptMapper;
  
      @Autowired
      private SysRoleMapper roleMapper;
  
      /**
       * 查询部门管理数据
       * 
       * @param dept 部门信息
       * @return 部门信息集合
       */
      @Override
      @DataScope(deptAlias = "d")
      public List<SysDept> selectDeptList(SysDept dept)
      {
          return deptMapper.selectDeptList(dept);
      }
  
      /**
       * 查询部门树结构信息
       * 
       * @param dept 部门信息
       * @return 部门树信息集合
       */
      @Override
      public List<TreeSelect> selectDeptTreeList(SysDept dept)
      {
          List<SysDept> depts = SpringUtils.getAopProxy(this).selectDeptList(dept);
          return buildDeptTreeSelect(depts);
      }
  
      /**
       * 构建前端所需要树结构
       * 
       * @param depts 部门列表
       * @return 树结构列表
       */
      @Override
      public List<SysDept> buildDeptTree(List<SysDept> depts)
      {
          List<SysDept> returnList = new ArrayList<SysDept>();
          List<Long> tempList = depts.stream().map(SysDept::getDeptId).collect(Collectors.toList());
          for (SysDept dept : depts)
          {
              // 如果是顶级节点, 遍历该父节点的所有子节点
              if (!tempList.contains(dept.getParentId()))
              {
                  recursionFn(depts, dept);
                  returnList.add(dept);
              }
          }
          if (returnList.isEmpty())
          {
              returnList = depts;
          }
          return returnList;
      }
  
      /**
       * 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<TreeSelect> buildDeptTreeSelect(List<SysDept> depts)
      {
          List<SysDept> deptTrees = buildDeptTree(depts);
          return deptTrees.stream().map(TreeSelect::new).collect(Collectors.toList());
      }
  
      /**
       * 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.selectRoleById(roleId);
          return deptMapper.selectDeptListByRoleId(roleId, role.isDeptCheckStrictly());
      }
  
      /**
       * 根据部门ID查询信息
       * 
       * @param deptId 部门ID
       * @return 部门信息
       */
      @Override
      public SysDept selectDeptById(Long deptId)
      {
          return deptMapper.selectDeptById(deptId);
      }
  
      /**
       * 根据ID查询所有子部门（正常状态）
       * 
       * @param deptId 部门ID
       * @return 子部门数
       */
      @Override
      public int selectNormalChildrenDeptById(Long deptId)
      {
          return deptMapper.selectNormalChildrenDeptById(deptId);
      }
  
      /**
       * 是否存在子节点
       * 
       * @param deptId 部门ID
       * @return 结果
       */
      @Override
      public boolean hasChildByDeptId(Long deptId)
      {
          int result = deptMapper.hasChildByDeptId(deptId);
          return result > 0;
      }
  
      /**
       * 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)
      {
          int result = deptMapper.checkDeptExistUser(deptId);
          return result > 0;
      }
  
      /**
       * 校验部门名称是否唯一
       * 
       * @param dept 部门信息
       * @return 结果
       */
      @Override
      public boolean checkDeptNameUnique(SysDept dept)
      {
          Long deptId = StringUtils.isNull(dept.getDeptId()) ? -1L : dept.getDeptId();
          SysDept info = deptMapper.checkDeptNameUnique(dept.getDeptName(), dept.getParentId());
          if (StringUtils.isNotNull(info) && info.getDeptId().longValue() != deptId.longValue())
          {
              return UserConstants.NOT_UNIQUE;
          }
          return UserConstants.UNIQUE;
      }
  
      /**
       * 校验部门是否有数据权限
       * 
       * @param deptId 部门id
       */
      @Override
      public void checkDeptDataScope(Long deptId)
      {
          if (!SysUser.isAdmin(SecurityUtils.getUserId()))
          {
              SysDept dept = new SysDept();
              dept.setDeptId(deptId);
              List<SysDept> depts = SpringUtils.getAopProxy(this).selectDeptList(dept);
              if (StringUtils.isEmpty(depts))
              {
                  throw new ServiceException("没有权限访问部门数据！");
              }
          }
      }
  
      /**
       * 新增保存部门信息
       * 
       * @param dept 部门信息
       * @return 结果
       */
      @Override
      public int insertDept(SysDept dept)
      {
          SysDept info = deptMapper.selectDeptById(dept.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");
          }
          dept.setAncestors(info.getAncestors() + "," + dept.getParentId());
          return deptMapper.insertDept(dept);
      }
  
      /**
       * 修改保存部门信息
       * 
       * @param dept 部门信息
       * @return 结果
       */
      @Override
      public int updateDept(SysDept dept)
      {
          SysDept newParentDept = deptMapper.selectDeptById(dept.getParentId());
          SysDept oldDept = deptMapper.selectDeptById(dept.getDeptId());
          if (StringUtils.isNotNull(newParentDept) && StringUtils.isNotNull(oldDept))
          {
              String newAncestors = newParentDept.getAncestors() + "," + newParentDept.getDeptId();
              String oldAncestors = oldDept.getAncestors();
              dept.setAncestors(newAncestors);
              updateDeptChildren(dept.getDeptId(), newAncestors, oldAncestors);
          }
          int result = deptMapper.updateDept(dept);
          if (UserConstants.DEPT_NORMAL.equals(dept.getStatus()) && StringUtils.isNotEmpty(dept.getAncestors())
                  && !StringUtils.equals("0", 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);
          deptMapper.updateDeptStatusNormal(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
       */
      public void updateDeptChildren(Long deptId, String newAncestors, String oldAncestors)
      {
          List<SysDept> children = deptMapper.selectChildrenDeptById(deptId);
          for (SysDept child : children)
          {
              child.setAncestors(child.getAncestors().replaceFirst(oldAncestors, newAncestors));
          }
          if (children.size() > 0)
          {
              deptMapper.updateDeptChildren(children);
          }
      }
  
      /**
       * 删除部门管理信息
       * 
       * @param deptId 部门ID
       * @return 结果
       */
      @Override
      public int deleteDeptById(Long deptId)
      {
          return deptMapper.deleteDeptById(deptId);
      }
  
      /**
       * 递归列表
       */
      private void recursionFn(List<SysDept> list, SysDept t)
      {
          // 得到子节点列表
          List<SysDept> childList = getChildList(list, t);
          t.setChildren(childList);
          for (SysDept tChild : childList)
          {
              if (hasChild(list, tChild))
              {
                  recursionFn(list, tChild);
              }
          }
      }
  
      /**
       * 得到子节点列表
       */
      private List<SysDept> getChildList(List<SysDept> list, SysDept t)
      {
          List<SysDept> tlist = new ArrayList<SysDept>();
          Iterator<SysDept> it = list.iterator();
          while (it.hasNext())
          {
              SysDept n = (SysDept) it.next();
              if (StringUtils.isNotNull(n.getParentId()) && n.getParentId().longValue() == t.getDeptId().longValue())
              {
                  tlist.add(n);
              }
          }
          return tlist;
      }
  
      /**
       * 判断是否有子节点
       */
      private boolean hasChild(List<SysDept> list, SysDept t)
      {
          return getChildList(list, t).size() > 0 ? true : false;
      }
  }
  