mirror of
https://gitee.com/langsisi_admin/serein-flow
synced 2026-03-03 00:00:49 +08:00
588 lines
24 KiB
C#
588 lines
24 KiB
C#
using Newtonsoft.Json;
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using Newtonsoft.Json.Linq;
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using Serein.Library.Api;
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using Serein.Library.Utils;
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using Serein.Library.Utils.SereinExpression;
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using System;
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using System.Collections;
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using System.Collections.Generic;
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using System.ComponentModel.Design;
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using System.Linq;
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using System.Linq.Expressions;
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using System.Net.Http.Headers;
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using System.Reflection;
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using System.Text;
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using System.Threading;
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using System.Threading.Tasks;
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using System.Xml.Linq;
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using static Serein.Library.Utils.ChannelFlowInterrupt;
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namespace Serein.Library
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{
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/// <summary>
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/// 节点基类（数据）：条件控件，动作控件，条件区域，动作区域
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/// </summary>
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public abstract partial class NodeModelBase : IDynamicFlowNode
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{
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#region 导出/导入项目文件节点信息
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/// <summary>
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/// 获取节点参数
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/// </summary>
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/// <returns></returns>
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public abstract Parameterdata[] GetParameterdatas();
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/// <summary>
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/// 导出为节点信息
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/// </summary>
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/// <returns></returns>
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public virtual NodeInfo ToInfo()
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{
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// if (MethodDetails == null) return null;
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var trueNodes = SuccessorNodes[ConnectionInvokeType.IsSucceed].Select(item => item.Guid); // 真分支
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var falseNodes = SuccessorNodes[ConnectionInvokeType.IsFail].Select(item => item.Guid);// 假分支
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var errorNodes = SuccessorNodes[ConnectionInvokeType.IsError].Select(item => item.Guid);// 异常分支
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var upstreamNodes = SuccessorNodes[ConnectionInvokeType.Upstream].Select(item => item.Guid);// 上游分支
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// 生成参数列表
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Parameterdata[] parameterData = GetParameterdatas();
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return new NodeInfo
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{
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Guid = Guid,
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MethodName = MethodDetails?.MethodName,
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Label = DisplayName ?? "",
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Type = this.GetType().ToString(),
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TrueNodes = trueNodes.ToArray(),
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FalseNodes = falseNodes.ToArray(),
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UpstreamNodes = upstreamNodes.ToArray(),
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ParameterData = parameterData.ToArray(),
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ErrorNodes = errorNodes.ToArray(),
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Position = Position,
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};
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}
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/// <summary>
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/// 从节点信息加载节点
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/// </summary>
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/// <param name="nodeInfo"></param>
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/// <returns></returns>
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public virtual NodeModelBase LoadInfo(NodeInfo nodeInfo)
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{
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this.Guid = nodeInfo.Guid;
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if (nodeInfo.Position is null)
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{
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nodeInfo.Position = new PositionOfUI(0, 0);
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}
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this.Position = nodeInfo.Position;// 加载位置信息
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if (this.MethodDetails != null)
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{
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for (int i = 0; i < nodeInfo.ParameterData.Length; i++)
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{
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Parameterdata pd = nodeInfo.ParameterData[i];
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this.MethodDetails.ParameterDetailss[i].IsExplicitData = pd.State;
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this.MethodDetails.ParameterDetailss[i].DataValue = pd.Value;
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}
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}
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return this;
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}
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#endregion
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#region 调试中断
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/// <summary>
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/// 不再中断
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/// </summary>
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public void CancelInterrupt()
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{
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this.DebugSetting.InterruptClass = InterruptClass.None;
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DebugSetting.CancelInterruptCallback?.Invoke();
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}
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#endregion
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#region 节点方法的执行
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/// <summary>
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/// 是否应该退出执行
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/// </summary>
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/// <param name="context"></param>
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/// <param name="flowCts"></param>
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/// <returns></returns>
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public static bool IsBradk(IDynamicContext context, CancellationTokenSource flowCts)
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{
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// 上下文不再执行
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if (context.RunState == RunState.Completion)
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{
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return true;
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}
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// 不存在全局触发器时，流程运行状态被设置为完成，退出执行，用于打断无限循环分支。
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if (flowCts is null && context.Env.FlowState == RunState.Completion)
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{
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return true;
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}
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// 如果存在全局触发器，且触发器的执行任务已经被取消时，退出执行。
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if (flowCts != null)
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{
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if (flowCts.IsCancellationRequested)
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return true;
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}
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return false;
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}
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/// <summary>
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/// 开始执行
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/// </summary>
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/// <param name="context"></param>
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/// <returns></returns>
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public async Task StartFlowAsync(IDynamicContext context)
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{
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Stack<NodeModelBase> stack = new Stack<NodeModelBase>();
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HashSet<NodeModelBase> processedNodes = new HashSet<NodeModelBase>(); // 用于记录已处理上游节点的节点
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stack.Push(this);
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var flowCts = context.Env.IOC.Get<CancellationTokenSource>(NodeStaticConfig.FlipFlopCtsName);
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bool hasFlipflow = flowCts != null;
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while (stack.Count > 0) // 循环中直到栈为空才会退出循环
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{
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#if DEBUG
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await Task.Delay(1);
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#endif
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#region 执行相关
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// 从栈中弹出一个节点作为当前节点进行处理
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var currentNode = stack.Pop();
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// 筛选出上游分支
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var upstreamNodes = currentNode.SuccessorNodes[ConnectionInvokeType.Upstream].ToArray();
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for (int index = 0; index < upstreamNodes.Length; index++)
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{
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NodeModelBase upstreamNode = upstreamNodes[index];
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if (!(upstreamNode is null) && upstreamNode.DebugSetting.IsEnable)
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{
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if (upstreamNode.DebugSetting.InterruptClass != InterruptClass.None) // 执行触发前
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{
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var cancelType = await upstreamNode.DebugSetting.GetInterruptTask();
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await Console.Out.WriteLineAsync($"[{upstreamNode.MethodDetails?.MethodName}]中断已{cancelType}，开始执行后继分支");
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}
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upstreamNode.PreviousNode = currentNode;
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await upstreamNode.StartFlowAsync(context); // 执行流程节点的上游分支
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if (context.NextOrientation == ConnectionInvokeType.IsError)
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{
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// 如果上游分支执行失败，不再继续执行
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// 使上游节点（仅上游节点本身，不包含上游节点的后继节点）
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// 具备通过抛出异常中断流程的能力
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break;
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}
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}
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}
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// 上游分支执行完成，才执行当前节点
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if (IsBradk(context, flowCts)) break; // 退出执行
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object newFlowData = await currentNode.ExecutingAsync(context);
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if (IsBradk(context, flowCts)) break; // 退出执行
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await RefreshFlowDataAndExpInterrupt(context, currentNode, newFlowData); // 执行当前节点后刷新数据
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#endregion
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#region 执行完成
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// 选择后继分支
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var nextNodes = currentNode.SuccessorNodes[context.NextOrientation];
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// 将下一个节点集合中的所有节点逆序推入栈中
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for (int i = nextNodes.Count - 1; i >= 0; i--)
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{
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// 筛选出启用的节点的节点
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if (nextNodes[i].DebugSetting.IsEnable)
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{
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nextNodes[i].PreviousNode = currentNode;
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stack.Push(nextNodes[i]);
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}
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}
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#endregion
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}
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}
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/// <summary>
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/// 执行节点对应的方法
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/// </summary>
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/// <param name="context">流程上下文</param>
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/// <returns>节点传回数据对象</returns>
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public virtual async Task<object> ExecutingAsync(IDynamicContext context)
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{
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#region 调试中断
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if (DebugSetting.InterruptClass != InterruptClass.None) // 执行触发检查是否需要中断
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{
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var cancelType = await this.DebugSetting.GetInterruptTask(); // 等待中断结束
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await Console.Out.WriteLineAsync($"[{this.MethodDetails?.MethodName}]中断已{cancelType}，开始执行后继分支");
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}
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#endregion
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MethodDetails md = MethodDetails;
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if (md is null)
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{
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throw new Exception($"节点{this.Guid}不存在方法信息，请检查是否需要重写节点的ExecutingAsync");
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}
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if (!context.Env.TryGetDelegateDetails(md.MethodName, out var dd))
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{
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throw new Exception($"节点{this.Guid}不存在对应委托");
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}
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if (md.ActingInstance is null)
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{
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md.ActingInstance = context.Env.IOC.Get(md.ActingInstanceType);
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}
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try
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{
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object[] args = await GetParametersAsync(context, this, md);
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var result = await dd.InvokeAsync(md.ActingInstance, args);
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context.NextOrientation = ConnectionInvokeType.IsSucceed;
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return result;
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}
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catch (Exception ex)
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{
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await Console.Out.WriteLineAsync($"节点[{this.MethodDetails?.MethodName}]异常：" + ex);
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context.NextOrientation = ConnectionInvokeType.IsError;
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RuningException = ex;
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return null;
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}
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}
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/// <summary>
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/// 执行单个节点对应的方法，并不做状态检查
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/// </summary>
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/// <param name="env"></param>
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/// <returns></returns>
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public virtual async Task<object> InvokeAsync(IFlowEnvironment env)
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{
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try
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{
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MethodDetails md = MethodDetails;
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if (md is null)
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{
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throw new Exception($"不存在方法信息{md.MethodName}");
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}
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if (!env.TryGetDelegateDetails(md.MethodName, out var dd))
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{
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throw new Exception($"不存在对应委托{md.MethodName}");
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}
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if (md.ActingInstance is null)
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{
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md.ActingInstance = env.IOC.Get(md.ActingInstanceType);
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if (md.ActingInstance is null)
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{
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md.ActingInstance = env.IOC.Instantiate(md.ActingInstanceType);
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if (md.ActingInstance is null)
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{
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throw new Exception($"无法创建相应的实例{md.ActingInstanceType.FullName}");
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}
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}
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}
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object[] args = await GetParametersAsync(null, this, md);
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var result = await dd.InvokeAsync(md.ActingInstance, args);
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return result;
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}
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catch (Exception ex)
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{
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await Console.Out.WriteLineAsync($"节点[{this.MethodDetails?.MethodName}]异常：" + ex);
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return null;
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}
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}
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/// <summary>
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/// 获取对应的参数数组
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/// </summary>
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public static async Task<object[]> GetParametersAsync(IDynamicContext context, NodeModelBase nodeModel, MethodDetails md)
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{
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await Task.Delay(0);
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// 用正确的大小初始化参数数组
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if (md.ParameterDetailss.Length == 0)
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{
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return null;// md.ActingInstance
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}
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object[] parameters = new object[md.ParameterDetailss.Length];
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var previousFlowData = nodeModel.PreviousNode?.FlowData; // 当前传递的数据
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var previousDataType = previousFlowData?.GetType(); // 当前传递数据的类型
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for (int i = 0; i < parameters.Length; i++)
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{
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var ed = md.ParameterDetailss[i]; // 方法入参描述
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#region 获取基础的上下文数据
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if (ed.DataType == typeof(IFlowEnvironment)) // 获取流程上下文
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{
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parameters[i] = nodeModel.Env;
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continue;
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}
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if (ed.DataType == typeof(IDynamicContext)) // 获取流程上下文
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{
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parameters[i] = context;
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continue;
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}
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#endregion
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#region 确定[预入参]数据
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object inputParameter; // 存放解析的临时参数
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if (ed.IsExplicitData) // 判断是否使用显示的输入参数
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{
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if (ed.DataValue.StartsWith("@get", StringComparison.OrdinalIgnoreCase) && !(previousFlowData is null))
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{
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// 执行表达式从上一节点获取对象
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inputParameter = SerinExpressionEvaluator.Evaluate(ed.DataValue, previousFlowData, out _);
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}
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else
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{
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// 使用输入的固定值
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inputParameter = ed.DataValue;
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}
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}
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else
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{
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if (ed.ArgDataSourceType == ConnectionArgSourceType.GetPreviousNodeData)
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{
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inputParameter = previousFlowData; // 使用运行时上一节点的返回值
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}
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else if (ed.ArgDataSourceType == ConnectionArgSourceType.GetPreviousNodeData)
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{
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// 获取指定节点的数据
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// 如果指定节点没有被执行，会返回null
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// 如果执行过，会获取上一次执行结果作为预入参数据
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inputParameter = ed.ArgDataSourceNodeMoels[i].FlowData;
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}
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else if (ed.ArgDataSourceType == ConnectionArgSourceType.GetOtherNodeDataOfInvoke)
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{
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// 立刻调用对应节点获取数据。
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var result = await ed.ArgDataSourceNodeMoels[i].InvokeAsync(nodeModel.Env);
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inputParameter = result;
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}
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else
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{
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throw new Exception("节点执行方法获取入参参数时，ConnectionArgSourceType枚举是意外的枚举值");
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}
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}
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#endregion
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#region 入参存在取值转换器，调用对应的转换器获取入参数据
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// 入参存在取值转换器
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if (ed.ExplicitType.IsEnum && !(ed.Convertor is null))
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{
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//var resultEnum = Enum.ToObject(ed.ExplicitType, ed.DataValue);
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var resultEnum = Enum.Parse(ed.ExplicitType, ed.DataValue);
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var value = ed.Convertor(resultEnum);
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if (value is null)
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{
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throw new InvalidOperationException("转换器调用失败");
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}
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else
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{
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parameters[i] = value;
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continue;
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}
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}
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#endregion
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#region 入参存在基于BinValue的类型转换器，获取枚举转换器中记录的类型
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// 入参存在基于BinValue的类型转换器，获取枚举转换器中记录的类型
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if (ed.ExplicitType.IsEnum && ed.DataType != ed.ExplicitType)
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{
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var resultEnum = Enum.Parse(ed.ExplicitType, ed.DataValue);
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// 获取绑定的类型
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var type = EnumHelper.GetBoundValue(ed.ExplicitType, resultEnum, attr => attr.Value);
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if (type is Type enumBindType && !(enumBindType is null))
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{
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var value = nodeModel.Env.IOC.Instantiate(enumBindType);
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if (value is null)
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{
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}
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else
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{
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parameters[i] = value;
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continue;
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}
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}
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}
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#endregion
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#region 对入参数据尝试进行转换
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if (inputParameter.GetType() == ed.DataType)
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{
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parameters[i] = inputParameter; // 类型一致无需转换，直接装入入参数组
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}
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else if (ed.DataType.IsValueType)
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{
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// 值类型
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var valueStr = inputParameter?.ToString();
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parameters[i] = valueStr.ToValueData(ed.DataType); // 类型不一致，尝试进行转换，如果转换失败返回类型对应的默认值
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}
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else
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{
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// 引用类型
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if (ed.DataType == typeof(string)) // 转为字符串
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{
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var valueStr = inputParameter?.ToString();
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parameters[i] = valueStr;
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}
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else if(ed.DataType.IsSubclassOf(inputParameter.GetType())) // 入参类型 是 预入参数据类型 的 子类/实现类
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{
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// 方法入参中，父类不能隐式转为子类，这里需要进行强制转换
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parameters[i] = ObjectConvertHelper.ConvertParentToChild(inputParameter, ed.DataType);
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}
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else if(ed.DataType.IsAssignableFrom(inputParameter.GetType())) // 入参类型 是 预入参数据类型 的 父类/接口
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{
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parameters[i] = inputParameter;
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}
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// 集合类型
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else if(inputParameter is IEnumerable collection)
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{
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var enumerableMethods = typeof(Enumerable).GetMethods(); // 获取所有的 Enumerable 扩展方法
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MethodInfo conversionMethod;
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if (ed.DataType.IsArray) // 转为数组
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{
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parameters[i] = inputParameter;
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conversionMethod = enumerableMethods.FirstOrDefault(m => m.Name == "ToArray" && m.IsGenericMethodDefinition);
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}
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else if (ed.DataType.GetGenericTypeDefinition() == typeof(List<>)) // 转为集合
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{
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conversionMethod = enumerableMethods.FirstOrDefault(m => m.Name == "ToList" && m.IsGenericMethodDefinition);
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}
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else
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{
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throw new InvalidOperationException("输入对象不是集合或目标类型不支持（目前仅支持Array、List的自动转换）");
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}
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var genericMethod = conversionMethod.MakeGenericMethod(ed.DataType);
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var result = genericMethod.Invoke(null, new object[] { collection });
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parameters[i] = result;
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}
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//else if (ed.DataType == typeof(MethodDetails)) // 希望获取节点对应的方法描述，好像没啥用
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//{
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// parameters[i] = md;
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//}
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//else if (ed.DataType == typeof(NodeModelBase)) // 希望获取方法生成的节点，好像没啥用
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//{
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// parameters[i] = nodeModel;
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//}
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}
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||
#endregion
|
||
|
||
|
||
}
|
||
return parameters;
|
||
}
|
||
|
||
|
||
/// <summary>
|
||
/// 更新节点数据，并检查监视表达式是否生效
|
||
/// </summary>
|
||
/// <param name="context">上下文</param>
|
||
/// <param name="nodeModel">节点Moel</param>
|
||
/// <param name="newData">新的数据</param>
|
||
/// <returns></returns>
|
||
public static async Task RefreshFlowDataAndExpInterrupt(IDynamicContext context, NodeModelBase nodeModel, object newData = null)
|
||
{
|
||
string guid = nodeModel.Guid;
|
||
if (newData is null)
|
||
{
|
||
}
|
||
else
|
||
{
|
||
await MonitorObjExpInterrupt(context, nodeModel, newData, 0); // 首先监视对象
|
||
await MonitorObjExpInterrupt(context, nodeModel, newData, 1); // 然后监视节点
|
||
nodeModel.FlowData = newData; // 替换数据
|
||
context.AddOrUpdate(guid, nodeModel); // 上下文中更新数据
|
||
}
|
||
}
|
||
|
||
private static async Task MonitorObjExpInterrupt(IDynamicContext context, NodeModelBase nodeModel, object data, int monitorType)
|
||
{
|
||
MonitorObjectEventArgs.ObjSourceType sourceType;
|
||
string key;
|
||
if (monitorType == 0)
|
||
{
|
||
key = data?.GetType()?.FullName;
|
||
sourceType = MonitorObjectEventArgs.ObjSourceType.IOCObj;
|
||
}
|
||
else
|
||
{
|
||
key = nodeModel.Guid;
|
||
sourceType = MonitorObjectEventArgs.ObjSourceType.IOCObj;
|
||
}
|
||
if (string.IsNullOrEmpty(key))
|
||
{
|
||
return;
|
||
}
|
||
(var isMonitor, var exps) = await context.Env.CheckObjMonitorStateAsync(key);
|
||
if (isMonitor) // 如果新的数据处于查看状态，通知UI进行更新？交给运行环境判断？
|
||
{
|
||
context.Env.MonitorObjectNotification(nodeModel.Guid, data, sourceType); // 对象处于监视状态，通知UI更新数据显示
|
||
if (exps.Length > 0)
|
||
{
|
||
// 表达式环境下判断是否需要执行中断
|
||
bool isExpInterrupt = false;
|
||
string exp = "";
|
||
// 判断执行监视表达式，直到为 true 时退出
|
||
for (int i = 0; i < exps.Length && !isExpInterrupt; i++)
|
||
{
|
||
exp = exps[i];
|
||
if (string.IsNullOrEmpty(exp)) continue;
|
||
// isExpInterrupt = SereinConditionParser.To(data, exp);
|
||
}
|
||
|
||
if (isExpInterrupt) // 触发中断
|
||
{
|
||
InterruptClass interruptClass = InterruptClass.Branch; // 分支中断
|
||
if (await context.Env.SetNodeInterruptAsync(nodeModel.Guid, interruptClass))
|
||
{
|
||
context.Env.TriggerInterrupt(nodeModel.Guid, exp, InterruptTriggerEventArgs.InterruptTriggerType.Exp);
|
||
var cancelType = await nodeModel.DebugSetting.GetInterruptTask();
|
||
await Console.Out.WriteLineAsync($"[{data}]中断已{cancelType}，开始执行后继分支");
|
||
}
|
||
}
|
||
}
|
||
|
||
}
|
||
}
|
||
|
||
/// <summary>
|
||
/// 释放对象
|
||
/// </summary>
|
||
public void ReleaseFlowData()
|
||
{
|
||
if (typeof(IDisposable).IsAssignableFrom(FlowData?.GetType()) && FlowData is IDisposable disposable)
|
||
{
|
||
disposable?.Dispose();
|
||
}
|
||
this.FlowData = null;
|
||
}
|
||
|
||
/// <summary>
|
||
/// 获取节点数据
|
||
/// </summary>
|
||
/// <returns></returns>
|
||
public object GetFlowData()
|
||
{
|
||
return this.FlowData;
|
||
}
|
||
#endregion
|
||
|
||
}
|
||
}
|
