抄送节点功能优化

@@ -871,7 +871,7 @@ export default {
           return Promise.reject('reject')
         }
         // 流程图中必须有一个流程节点
-        let is_flow_node = nodes.filter(node => node.control === 'flow');
+        let is_flow_node = nodes.filter(node => node.control === 'flow' || node.control === 'cc');
         if (is_flow_node.length === 1) {
           ElNotification.error('流程图中必须有一个流程节点')
           return Promise.reject('reject')
@@ -933,6 +933,13 @@ export default {
           ElNotification.error('流程不能连线到开始节点')
           return Promise.reject('reject')
         }
+        for (let index = 0; index < nodes.length; index++) {
+          const element = nodes[index]
+          if (element.id === source && element.control === 'cc') {
+            ElNotification.error('抄送节点不可以连接线')
+            return Promise.reject('reject')
+          }
+        }
       }
       if (type === 'node') {
         if (model.control === 'start' || model.control === 'end') {