在后端添加流程按钮

需求

需要在前端流程表单页面添加流程按钮

方法一：通过 cmd 代理添加按钮

可通过后端对流程按钮 cmd 类进行代理，添加按钮

代理GetRightMenu类

@CommandDynamicProxy(target = GetRightMenuCmd.class,desc = "添加右键菜单")
public class AddMeunu extends AbstractCommandProxy<Map<String ,Object>> {

    @Override
    public Map<String, Object> execute(Command<Map<String, Object>> command) {

        return null;
    }
}

按照下面逻辑添加一个按钮

import com.engine.core.cfg.annotation.CommandDynamicProxy;
import com.engine.core.interceptor.AbstractCommandProxy;
import com.engine.core.interceptor.Command;
import com.engine.workflow.cmd.requestForm.GetRightMenuCmd;
import com.engine.workflow.constant.menu.SystemMenuType;
import com.engine.workflow.constant.requestForm.RequestMenuType;
import com.engine.workflow.entity.requestForm.RightMenu;

import java.util.List;
import java.util.Map;

@CommandDynamicProxy(target = GetRightMenuCmd.class,desc = "添加流程顶部菜单")
public class GetRightMenuProxyWithCmd extends AbstractCommandProxy<Map<String, Object>>{

    @Override
    public Map<String, Object> execute(Command<Map<String, Object>> command) {
        Map<String ,Object> result =nextExecute(command);

        List<RightMenu> rightMenus = (List<RightMenu>) result.get("rightMenus");
        RightMenu rightMenu = new RightMenu(
                "测试2",
                RequestMenuType.BTN_CUSTOMIZE,
                "window.doProxyCmd(\"proxyCmdBtn\")",
                "icon-coms-daiban", 101,
                SystemMenuType.CUSTOMIZE);
        rightMenu.setIsTop("1");
        rightMenus.add(rightMenu);

        return result;
    }
}

RightMenu 构造函数中的 order 参数，可以控制是否在表单顶部显示，如果order的值比较小，比如0，按钮就会显示在第一个位置，如果order比较大，则会显示在下拉菜单中，如果要显示在顶部，order推荐小于等于3

方法二：通过接口拦截添加按钮

拦截 `/api/workflow/reqform/rightMenu` 接口，修改接口返回数据进行添加按钮

示例：

import com.alibaba.fastjson.JSONObject;
import com.cloudstore.dev.api.util.Util_DataCache;
import com.customization.yll.common.util.PropertiesUtil;
import com.engine.workflow.constant.menu.SystemMenuType;
import com.engine.workflow.constant.requestForm.RequestMenuType;
import com.engine.workflow.entity.requestForm.RightMenu;
import com.weaverboot.frame.ioc.anno.classAnno.WeaIocReplaceComponent;
import com.weaverboot.frame.ioc.anno.methodAnno.WeaReplaceAfter;
import com.weaverboot.frame.ioc.handler.replace.weaReplaceParam.impl.WeaAfterReplaceParam;
import org.jetbrains.annotations.NotNull;
import weaver.conn.RecordSet;

import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.Properties;

/**
 * @author 姚礼林
 * @desc 流程添加自定义按钮
 * @date 2023/11/17
 */

@WeaIocReplaceComponent("AddWorkflowCustomMenu")
public class AddWorkflowBtIntercept {
    private static final String CONFIG_FILE_NAME = "FW20240521-workflow-custom-menu";
    private static final String CONFIG_TABLE_NAME_PROP_NAME = "modeTableName";
    private static final String WORKFLOW_FIELD_NAME_PROP_NAME = "workflowFieldName";
    private static final String MENU_NAME_PROP_NAME = "menuName";
    private static final String IS_TOP_PROP_NAME = "isTop";
    private static final String CACHE_KEY_NAME = "customWorkflowMenuProp";

    @WeaReplaceAfter(value = "/api/workflow/reqform/rightMenu",order = 1,description = "流程添加自定义按钮")
    public String rightMenuAfter(WeaAfterReplaceParam weaAfterReplaceParam){
        Map<String ,Object> paramMap = weaAfterReplaceParam.getParamMap();
        String workflowId = (String) paramMap.get("workflowid");
        Properties properties = getProperties();
        if (!isTargetWorkflow(workflowId,properties)){
            return weaAfterReplaceParam.getData();
        }
        Map<String, Object> data = JSONObject.parseObject(weaAfterReplaceParam.getData(), Map.class);
        List<RightMenu> rightMenus = (List<RightMenu>) data.getOrDefault("rightMenus", new ArrayList<>());
        RightMenu rightMenu = buildMenu(properties,rightMenus.size());
        rightMenus.add(rightMenu);
        data.put("rightMenus", rightMenus);
        return JSONObject.toJSONString(data);
    }

    @NotNull
    private RightMenu buildMenu(Properties properties,int menuSize) {
        String menuName = properties.getProperty(MENU_NAME_PROP_NAME);
        String isTop = properties.getProperty(IS_TOP_PROP_NAME);
        int order = "1".equals(isTop) ? 2 : menuSize;
        RightMenu rightMenu = new RightMenu(menuName, RequestMenuType.BTN_CUSTOMIZE, "", "icon-coms-daiban",
                order, SystemMenuType.CUSTOMIZE);
        rightMenu.setIsTop(isTop);
        rightMenu.setMobile(true);
        return rightMenu;
    }

    private  boolean isTargetWorkflow(String workflowId,Properties properties) {
        String tableName = properties.getProperty(CONFIG_TABLE_NAME_PROP_NAME);
        String workflowFieldName = properties.getProperty(WORKFLOW_FIELD_NAME_PROP_NAME);
        RecordSet recordSet = new RecordSet();
        recordSet.executeQuery("SELECT id from "+tableName+" where "+workflowFieldName+"=?", workflowId);
        return recordSet.next();
    }

    private Properties getProperties() {
        int oneHourSeconds = 3600;
        if (!Util_DataCache.containsKey(CACHE_KEY_NAME)) {
            Properties properties = PropertiesUtil.fetchProperties(CONFIG_FILE_NAME);
            Util_DataCache.setObjVal(CACHE_KEY_NAME,properties,oneHourSeconds);
            return properties;
        }
        return (Properties) Util_DataCache.getObjVal(CACHE_KEY_NAME);
    }
}