package com.matrix.system.common.tag;
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import com.matrix.core.tools.WebUtil;
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import com.matrix.system.common.authority.AuthorityManager;
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import com.matrix.system.common.authority.DefaultAuthorityManager;
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import com.matrix.system.common.constance.AppConstance;
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import org.thymeleaf.IEngineConfiguration;
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import org.thymeleaf.context.ITemplateContext;
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import org.thymeleaf.engine.AttributeName;
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import org.thymeleaf.model.IProcessableElementTag;
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import org.thymeleaf.processor.element.AbstractAttributeTagProcessor;
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import org.thymeleaf.processor.element.IElementTagStructureHandler;
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import org.thymeleaf.standard.expression.IStandardExpression;
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import org.thymeleaf.standard.expression.IStandardExpressionParser;
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import org.thymeleaf.standard.expression.StandardExpressions;
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import org.thymeleaf.templatemode.TemplateMode;
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/**
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* 页面按钮权限类
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*
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* @author jiangyouyao
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* @email 512061637@qq.com
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* @date 2019年2月25日
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*/
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public class ButtonRoleFnTagProcessor extends AbstractAttributeTagProcessor {
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/**
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* 标签名
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*/
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private static final String ATTR_NAME = "fn";
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/**
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* 优先级
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*/
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private static final int PRECEDENCE = 10000;
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public ButtonRoleFnTagProcessor(final String dialectPrefix) {
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super( // This processor will apply only to HTML mode
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TemplateMode.HTML,
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// Prefix to be applied to name for matching
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dialectPrefix,
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// No tag name: match any tag name
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null,
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// No prefix to be applied to tag name
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false,
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// Name of the attribute that will be matched
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ATTR_NAME,
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// Apply dialect prefix to attribute name
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true,
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// Precedence (inside dialect's own precedence)
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PRECEDENCE,
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// Remove the matched attribute afterwards
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true);
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}
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/**
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* 自定义标签主方法
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*
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* @author jiangyouyao
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* @email 512061637@qq.com
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* @date 2019年1月12日
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* @param context
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* @param tag
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* @param attributeName
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* @param attributeValue
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* @param structureHandler
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*/
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@Override
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protected void doProcess(ITemplateContext context, IProcessableElementTag tag, AttributeName attributeName,
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String attributeValue, IElementTagStructureHandler structureHandler) {
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final IEngineConfiguration configuration = context.getConfiguration();
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// Obtain the Thymeleaf Standard Expression parser
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final IStandardExpressionParser parser = StandardExpressions.getExpressionParser(configuration);
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// Parse the attribute value as a Thymeleaf Standard Expression
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final IStandardExpression expression = parser.parseExpression(context, attributeValue);
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// 标签的值 功能code-add 这种类型
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final String attrValue = expression.execute(context).toString();
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// 此时根据当前登录用户判断是否有该权限
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AuthorityManager authority = (DefaultAuthorityManager) WebUtil.getBean(AppConstance.DEFAULT_AUTHORITYMANAGER);
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if (!authority.isFnPermitted(attrValue)) {
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// 如果没有该按钮权限，则直接移除该模块
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structureHandler.removeElement();
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}
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}
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}
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