package com.ruoyi.framework.handler;
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import cn.hutool.core.annotation.AnnotationUtil;
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import cn.hutool.core.util.ArrayUtil;
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import cn.hutool.core.util.ClassUtil;
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import cn.hutool.core.util.ObjectUtil;
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import com.ruoyi.common.annotation.DataColumn;
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import com.ruoyi.common.annotation.DataPermission;
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import com.ruoyi.common.core.domain.entity.SysRole;
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import com.ruoyi.common.core.domain.entity.SysUser;
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import com.ruoyi.common.core.service.UserService;
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import com.ruoyi.common.enums.DataScopeType;
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import com.ruoyi.common.exception.ServiceException;
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import com.ruoyi.common.utils.SecurityUtils;
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import com.ruoyi.common.utils.StringUtils;
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import com.ruoyi.common.utils.spring.SpringUtils;
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import lombok.extern.slf4j.Slf4j;
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import net.sf.jsqlparser.JSQLParserException;
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import net.sf.jsqlparser.expression.Expression;
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import net.sf.jsqlparser.expression.operators.conditional.AndExpression;
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import net.sf.jsqlparser.parser.CCJSqlParserUtil;
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import org.springframework.context.expression.BeanFactoryResolver;
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import org.springframework.expression.BeanResolver;
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import org.springframework.expression.ExpressionParser;
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import org.springframework.expression.ParserContext;
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import org.springframework.expression.common.TemplateParserContext;
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import org.springframework.expression.spel.standard.SpelExpressionParser;
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import org.springframework.expression.spel.support.StandardEvaluationContext;
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import java.lang.reflect.Method;
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import java.util.Arrays;
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import java.util.List;
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import java.util.stream.Collectors;
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/**
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* 数据权限过滤
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*
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* @author Lion Li
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*/
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@Slf4j
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public class PlusDataPermissionHandler {
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private final ExpressionParser parser = new SpelExpressionParser();
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private final ParserContext parserContext = new TemplateParserContext();
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private final BeanResolver beanResolver = new BeanFactoryResolver(SpringUtils.getBeanFactory());
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public Expression getSqlSegment(Expression where, String mappedStatementId, boolean isSelect) {
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DataColumn[] dataColumns = findAnnotation(mappedStatementId);
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if (ArrayUtil.isEmpty(dataColumns)) {
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return where;
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}
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SysUser currentUser = SpringUtils.getBean(UserService.class).selectUserById(SecurityUtils.getUserId());
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// 如果是超级管理员，则不过滤数据
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if (StringUtils.isNull(currentUser) || currentUser.isAdmin()) {
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return where;
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}
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String dataFilterSql = buildDataFilter(currentUser, dataColumns, isSelect);
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if (StringUtils.isBlank(dataFilterSql)) {
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return where;
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}
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try {
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Expression expression = CCJSqlParserUtil.parseExpression(dataFilterSql);
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if (ObjectUtil.isNotNull(where)) {
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return new AndExpression(where, expression);
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} else {
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return expression;
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}
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} catch (JSQLParserException e) {
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throw new ServiceException("数据权限解析异常 => " + e.getMessage());
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}
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}
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/**
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* 构造数据过滤sql
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*/
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private String buildDataFilter(SysUser user, DataColumn[] dataColumns, boolean isSelect) {
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StringBuilder sqlString = new StringBuilder();
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StandardEvaluationContext context = new StandardEvaluationContext();
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context.setBeanResolver(beanResolver);
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context.setVariable("user", user);
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for (DataColumn dataColumn : dataColumns) {
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// 设置注解变量 key 为表达式变量 value 为变量值
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context.setVariable(dataColumn.key(), dataColumn.value());
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for (SysRole role : user.getRoles()) {
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user.setRoleId(role.getRoleId());
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// 获取角色权限泛型
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DataScopeType type = DataScopeType.findCode(role.getDataScope());
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if (ObjectUtil.isNull(type)) {
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throw new ServiceException("角色数据范围异常 => " + role.getDataScope());
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}
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// 全部数据权限直接返回
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if (type == DataScopeType.ALL) {
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return "";
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}
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// 不包含 key 变量 则不处理
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if (!StringUtils.contains(type.getSqlTemplate(), "#" + dataColumn.key())) {
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sqlString.append(type.getElseSql());
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continue;
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}
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// 更新或删除需满足所有条件
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sqlString.append(isSelect ? " OR " : " AND ");
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// 解析sql模板并填充
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String sql = parser.parseExpression(type.getSqlTemplate(), parserContext).getValue(context, String.class);
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sqlString.append(sql);
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}
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}
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if (StringUtils.isNotBlank(sqlString.toString())) {
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return sqlString.substring(isSelect ? 4 : 5);
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}
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return "";
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}
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private DataColumn[] findAnnotation(String mappedStatementId) {
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StringBuilder sb = new StringBuilder(mappedStatementId);
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int index = sb.lastIndexOf(".");
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String clazzName = sb.substring(0, index);
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String methodName = sb.substring(index + 1, sb.length());
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Class<?> clazz = ClassUtil.loadClass(clazzName);
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List<Method> methods = Arrays.stream(ClassUtil.getDeclaredMethods(clazz))
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.filter(method -> method.getName().equals(methodName)).collect(Collectors.toList());
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DataPermission dataPermission;
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for (Method method : methods) {
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if (AnnotationUtil.hasAnnotation(method, DataPermission.class)) {
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dataPermission = AnnotationUtil.getAnnotation(method, DataPermission.class);
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return dataPermission.value();
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}
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}
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return null;
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}
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}
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