package com.gaotao.common.aspect;


import com.gaotao.common.annotation.DataScope;
import com.gaotao.common.utils.StringUtils;
import com.gaotao.core.domain.BaseEntity;
import com.gaotao.modules.sys.entity.SysUserEntity;
import org.apache.shiro.SecurityUtils;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.springframework.stereotype.Component;



/**
 * 数据过滤处理
 */
@Aspect
@Component
public class DataScopeAspect {

    /**
     * 数据权限过滤关键字
     */
    public static final String DATA_SCOPE = "dataScope";

    @Before("@annotation(dataScope)")
    public void doBefore(JoinPoint joinPoint, DataScope dataScope) {
        clearDataScope(joinPoint);
        handleDataScope(joinPoint, dataScope);
    }

    protected void handleDataScope(final JoinPoint joinPoint, DataScope dataScope)
    {
        //获取当前登录用户部门id
        SysUserEntity currentUser = (SysUserEntity) SecurityUtils.getSubject().getPrincipal();
        String site = currentUser.getSite();

        StringBuilder sqlString = new StringBuilder();

        if(currentUser.isAdmin()){
            return;
        }
        //判断参数类型，分别处理,部门分类
        if (StringUtils.isNotEmpty(dataScope.deptAlias())) {
            sqlString.append("CHARINDEX(" + dataScope.deptAlias() + ".site, '" + site + "')>0");
        }
        //判断参数类型，分别处理,用户分类
        if (StringUtils.isNotBlank(sqlString.toString()))
        {
            Object params = joinPoint.getArgs()[0];
            if (StringUtils.isNotNull(params) && params instanceof BaseEntity)
            {
                BaseEntity baseEntity = (BaseEntity) params;
                baseEntity.getParams().put(DATA_SCOPE, " AND (" + sqlString + ")");
            }
        }
    }

    /**
     * 拼接权限sql前先清空params.dataScope参数防止注入
     */
    private void clearDataScope(final JoinPoint joinPoint)
    {
        Object params = joinPoint.getArgs()[0];
        if (StringUtils.isNotNull(params) && params instanceof BaseEntity)
        {
            BaseEntity baseEntity = (BaseEntity) params;
            baseEntity.getParams().put(DATA_SCOPE, "");
        }
    }
}