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   源码介绍

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package com.imooc.permission.service;

import com.google.common.base.Preconditions;
import com.imooc.permission.common.RequestHolder;
import com.imooc.permission.dao.SysAclMapper;
import com.imooc.permission.dao.SysAclModuleMapper;
import com.imooc.permission.exception.ParamException;
import com.imooc.permission.model.SysAclModule;
import com.imooc.permission.param.AclModuleParam;
import com.imooc.permission.util.BeanValidator;
import com.imooc.permission.util.IpUtil;
import com.imooc.permission.util.LevelUtil;
import org.apache.commons.collections.CollectionUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.Date;
import java.util.List;

@Service
public class SysAclModuleService {

    @Autowired
    private SysAclModuleMapper sysAclModuleMapper;

    @Autowired
    private SysAclMapper sysAclMapper;

    @Autowired
    private SysLogService sysLogService;

    public void save(AclModuleParam param) {
        BeanValidator.check(param);
        if(checkExist(param.getParentId(), param.getName(), param.getId())) {
            throw new ParamException("同一层级下存在相同名称的权限模块");
        }
        SysAclModule aclModule = SysAclModule.builder().name(param.getName()).parentId(param.getParentId()).seq(param.getSeq())
                .status(param.getStatus()).remark(param.getRemark()).build();
        aclModule.setLevel(LevelUtil.calculateLevel(getLevel(param.getParentId()), param.getParentId()));
        aclModule.setOperator(RequestHolder.getCurrentUser().getUsername());
        aclModule.setOperateIp(IpUtil.getRemoteIp(RequestHolder.getCurrentRequest()));
        aclModule.setOperateTime(new Date());
        sysAclModuleMapper.insertSelective(aclModule);
        sysLogService.saveAclModuleLog(null, aclModule);
    }

    public void update(AclModuleParam param) {
        BeanValidator.check(param);
        if(checkExist(param.getParentId(), param.getName(), param.getId())) {
            throw new ParamException("同一层级下存在相同名称的权限模块");
        }
        SysAclModule before = sysAclModuleMapper.selectByPrimaryKey(param.getId());
        Preconditions.checkNotNull(before, "待更新的权限模块不存在");

        SysAclModule after = SysAclModule.builder().id(param.getId()).name(param.getName()).parentId(param.getParentId()).seq(param.getSeq())
                .status(param.getStatus()).remark(param.getRemark()).build();
        after.setLevel(LevelUtil.calculateLevel(getLevel(param.getParentId()), param.getParentId()));
        after.setOperator(RequestHolder.getCurrentUser().getUsername());
        after.setOperateIp(IpUtil.getRemoteIp(RequestHolder.getCurrentRequest()));
        after.setOperateTime(new Date());

        updateWithChild(before, after);
        sysLogService.saveAclModuleLog(before, after);
    }

    private void updateWithChild(SysAclModule before, SysAclModule after) {
        String newLevelPrefix = after.getLevel();
        String oldLevelPrefix = before.getLevel();
        if (!after.getLevel().equals(before.getLevel())) {
            String curLevel = before.getLevel()   "."   before.getId();
            List<SysAclModule> aclModuleList = sysAclModuleMapper.getChildAclModuleListByLevel(curLevel   "%");
            if (CollectionUtils.isNotEmpty(aclModuleList)) {
                for (SysAclModule aclModule : aclModuleList) {
                    String level = aclModule.getLevel();
                    if (level.equals(curLevel) || level.indexOf(curLevel   ".") == 0) {
                        // getChildAclModuleListByLevel可能会取出多余的内容，因此需要加个判断
                        // 比如0.1* 可能取出0.1、0.1.3、0.11、0.11.3，而期望取出  0.1、0.1.3， 因此呢需要判断等于0.1或者以0.1.为前缀才满足条件
                        level = newLevelPrefix   level.substring(oldLevelPrefix.length());
                        aclModule.setLevel(level);
                    }
                }
                sysAclModuleMapper.batchUpdateLevel(aclModuleList);
            }
        }
        sysAclModuleMapper.updateByPrimaryKeySelective(after);
    }

    private boolean checkExist(Integer parentId, String aclModuleName, Integer deptId) {
        return sysAclModuleMapper.countByNameAndParentId(parentId, aclModuleName, deptId) > 0;
    }

    private String getLevel(Integer aclModuleId) {
        SysAclModule aclModule = sysAclModuleMapper.selectByPrimaryKey(aclModuleId);
        if (aclModule == null) {
            return null;
        }
        return aclModule.getLevel();
    }

    public void delete(int aclModuleId) {
        SysAclModule aclModule = sysAclModuleMapper.selectByPrimaryKey(aclModuleId);
        Preconditions.checkNotNull(aclModule, "待删除的权限模块不存在，无法删除");
        if(sysAclModuleMapper.countByParentId(aclModule.getId()) > 0) {
            throw new ParamException("当前模块下面有子模块，无法删除");
        }
        if (sysAclMapper.countByAclModuleId(aclModule.getId()) > 0) {
            throw new ParamException("当前模块下面有用户，无法删除");
        }
        sysAclModuleMapper.deleteByPrimaryKey(aclModuleId);
    }
}