mirror of
https://gitee.com/langsisi_admin/serein-flow
synced 2026-03-03 00:00:49 +08:00
570 lines
20 KiB
C#
570 lines
20 KiB
C#
using Newtonsoft.Json;
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using Serein.Library.Api;
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using Serein.Library.Enums;
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using Serein.Library.Core.NodeFlow;
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using Serein.NodeFlow.Tool;
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using Serein.NodeFlow.Tool.SerinExpression;
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namespace Serein.NodeFlow.Model
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{
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public enum ConnectionType
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{
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/// <summary>
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/// 真分支
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/// </summary>
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IsSucceed,
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/// <summary>
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/// 假分支
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/// </summary>
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IsFail,
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/// <summary>
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/// 异常发生分支
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/// </summary>
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IsError,
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/// <summary>
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/// 上游分支（执行当前节点前会执行一次上游分支）
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/// </summary>
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Upstream,
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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 class NodeBase : IDynamicFlowNode
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{
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public MethodDetails MethodDetails { get; set; }
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public string Guid { get; set; }
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public string DisplayName { get; set; }
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public bool IsStart { get; set; }
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public string DelegateName { get; set; }
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/// <summary>
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/// 运行时的上一节点
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/// </summary>
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public NodeBase? PreviousNode { get; set; }
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/// <summary>
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/// 上一节点集合
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/// </summary>
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public List<NodeBase> PreviousNodes { get; set; } = [];
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/// <summary>
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/// 下一节点集合（真分支）
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/// </summary>
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public List<NodeBase> SucceedBranch { get; set; } = [];
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/// <summary>
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/// 下一节点集合（假分支）
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/// </summary>
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public List<NodeBase> FailBranch { get; set; } = [];
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/// <summary>
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/// 异常分支
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/// </summary>
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public List<NodeBase> ErrorBranch { get; set; } = [];
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/// <summary>
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/// 上游分支
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/// </summary>
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public List<NodeBase> UpstreamBranch { get; set; } = [];
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/// <summary>
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/// 当前状态（进入真分支还是假分支，异常分支在异常中确定）
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/// </summary>
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public FlowStateType FlowState { get; set; } = FlowStateType.Succeed;
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public Exception Exception { get; set; } = null;
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/// <summary>
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/// 当前传递数据
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/// </summary>
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public object? FlowData { get; set; } = null;
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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 object? Execute(IDynamicContext context)
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{
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MethodDetails md = MethodDetails;
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object? result = null;
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if (!DelegateCache.GlobalDicDelegates.TryGetValue(md.MethodName, out Delegate del))
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{
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return result;
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}
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try
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{
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if (md.ExplicitDatas.Length == 0)
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{
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if (md.ReturnType == typeof(void))
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{
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((Action<object>)del).Invoke(md.ActingInstance);
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}
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else
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{
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result = ((Func<object, object>)del).Invoke(md.ActingInstance);
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}
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}
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else
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{
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object?[]? parameters = GetParameters(context, MethodDetails);
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if (md.ReturnType == typeof(void))
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{
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((Action<object, object[]>)del).Invoke(md.ActingInstance, parameters);
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}
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else
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{
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result = ((Func<object, object[], object>)del).Invoke(md.ActingInstance, parameters);
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}
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}
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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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FlowState = FlowStateType.Error;
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Exception = ex;
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}
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return result;
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}
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/// <summary>
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/// 执行等待触发器的方法
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/// </summary>
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/// <param name="context"></param>
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/// <returns>节点传回数据对象</returns>
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/// <exception cref="Exception"></exception>
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public virtual async Task<object?> ExecuteAsync(IDynamicContext context)
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{
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MethodDetails md = MethodDetails;
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object? result = null;
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if (!DelegateCache.GlobalDicDelegates.TryGetValue(md.MethodName, out Delegate del))
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{
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return result;
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}
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IFlipflopContext flipflopContext = null;
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try
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{
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// 调用委托并获取结果
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if (md.ExplicitDatas.Length == 0)
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{
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flipflopContext = await ((Func<object, Task<IFlipflopContext>>)del).Invoke(MethodDetails.ActingInstance);
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}
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else
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{
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object?[]? parameters = GetParameters(context, MethodDetails);
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flipflopContext = await ((Func<object, object[], Task<IFlipflopContext>>)del).Invoke(MethodDetails.ActingInstance, parameters);
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}
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if (flipflopContext != null)
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{
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FlowState = flipflopContext.State;
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if (flipflopContext.State == FlowStateType.Succeed)
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{
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result = flipflopContext.Data;
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}
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else
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{
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result = null;
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}
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}
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}
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catch (Exception ex)
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{
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FlowState = FlowStateType.Error;
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Exception = ex;
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}
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return result;
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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 StartExecution(IDynamicContext context)
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{
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var cts = context.SereinIoc.GetOrInstantiate<CancellationTokenSource>();
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Stack<NodeBase> stack = [];
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stack.Push(this);
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while (stack.Count > 0 && !cts.IsCancellationRequested) // 循环中直到栈为空才会退出循环
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{
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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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// 设置方法执行的对象
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if (currentNode.MethodDetails != null)
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{
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currentNode.MethodDetails.ActingInstance ??= context.SereinIoc.GetOrInstantiate(MethodDetails.ActingInstanceType);
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}
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// 获取上游分支，首先执行一次
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var upstreamNodes = currentNode.UpstreamBranch;
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for (int i = upstreamNodes.Count - 1; i >= 0; i--)
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{
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upstreamNodes[i].PreviousNode = currentNode;
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await upstreamNodes[i].StartExecution(context);
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}
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if (currentNode.MethodDetails != null && currentNode.MethodDetails.MethodDynamicType == NodeType.Flipflop)
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{
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// 触发器节点
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currentNode.FlowData = await currentNode.ExecuteAsync(context);
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}
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else
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{
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// 动作节点
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currentNode.FlowData = currentNode.Execute(context);
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}
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var nextNodes = currentNode.FlowState switch
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{
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FlowStateType.Succeed => currentNode.SucceedBranch,
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FlowStateType.Fail => currentNode.FailBranch,
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FlowStateType.Error => currentNode.ErrorBranch,
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_ => throw new Exception("非预期的枚举值")
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};
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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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nextNodes[i].PreviousNode = currentNode;
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stack.Push(nextNodes[i]);
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}
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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 object[]? GetParameters(IDynamicContext context, MethodDetails md)
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{
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// 用正确的大小初始化参数数组
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var types = md.ExplicitDatas.Select(it => it.DataType).ToArray();
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if (types.Length == 0)
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{
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return [md.ActingInstance];
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}
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object[]? parameters = new object[types.Length];
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for (int i = 0; i < types.Length; i++)
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{
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var mdEd = md.ExplicitDatas[i];
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Type type = mdEd.DataType;
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var f1 = PreviousNode?.FlowData?.GetType();
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var f2 = mdEd.DataType;
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if (type == typeof(IDynamicContext))
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{
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parameters[i] = context;
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}
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else if (type == typeof(MethodDetails))
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{
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parameters[i] = md;
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}
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else if (type == typeof(NodeBase))
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{
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parameters[i] = this;
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}
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else if (mdEd.IsExplicitData) // 显式参数
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{
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// 判断是否使用表达式解析
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if (mdEd.DataValue[0] == '@')
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{
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var expResult = SerinExpressionEvaluator.Evaluate(mdEd.DataValue, PreviousNode?.FlowData, out bool isChange);
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if (mdEd.DataType.IsEnum)
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{
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var enumValue = Enum.Parse(mdEd.DataType, mdEd.DataValue);
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parameters[i] = enumValue;
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}
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else if (mdEd.ExplicitType == typeof(string))
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{
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parameters[i] = Convert.ChangeType(expResult, typeof(string));
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}
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else if (mdEd.ExplicitType == typeof(bool))
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{
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parameters[i] = Convert.ChangeType(expResult, typeof(bool));
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}
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else if (mdEd.ExplicitType == typeof(int))
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{
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parameters[i] = Convert.ChangeType(expResult, typeof(int));
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}
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else if (mdEd.ExplicitType == typeof(double))
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{
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parameters[i] = Convert.ChangeType(expResult, typeof(double));
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}
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else
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{
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parameters[i] = expResult;
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//parameters[i] = ConvertValue(mdEd.DataValue, mdEd.ExplicitType);
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}
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}
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else
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{
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if (mdEd.DataType.IsEnum)
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{
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var enumValue = Enum.Parse(mdEd.DataType, mdEd.DataValue);
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parameters[i] = enumValue;
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}
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else if (mdEd.ExplicitType == typeof(string))
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{
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parameters[i] = mdEd.DataValue;
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}
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else if (mdEd.ExplicitType == typeof(bool))
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{
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parameters[i] = bool.Parse(mdEd.DataValue);
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}
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else if (mdEd.ExplicitType == typeof(int))
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{
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parameters[i] = int.Parse(mdEd.DataValue);
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}
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else if (mdEd.ExplicitType == typeof(double))
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{
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parameters[i] = double.Parse(mdEd.DataValue);
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}
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else
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{
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parameters[i] = "";
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//parameters[i] = ConvertValue(mdEd.DataValue, mdEd.ExplicitType);
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}
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}
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}
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else if (f1 != null && f2 != null)
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{
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if(f2.IsAssignableFrom(f1) || f2.FullName.Equals(f1.FullName))
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{
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parameters[i] = PreviousNode?.FlowData;
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}
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}
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else
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{
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var tmpParameter = PreviousNode?.FlowData?.ToString();
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if (mdEd.DataType.IsEnum)
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{
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var enumValue = Enum.Parse(mdEd.DataType, tmpParameter);
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parameters[i] = enumValue;
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}
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else if (mdEd.DataType == typeof(string))
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{
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parameters[i] = tmpParameter;
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}
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else if (mdEd.DataType == typeof(bool))
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{
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parameters[i] = bool.Parse(tmpParameter);
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}
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else if (mdEd.DataType == typeof(int))
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{
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parameters[i] = int.Parse(tmpParameter);
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}
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else if (mdEd.DataType == typeof(double))
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{
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parameters[i] = double.Parse(tmpParameter);
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}
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else
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{
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if (tmpParameter != null && mdEd.DataType != null)
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{
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parameters[i] = ConvertValue(tmpParameter, mdEd.DataType);
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}
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}
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}
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}
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return parameters;
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}
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/// <summary>
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/// json文本反序列化为对象
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/// </summary>
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/// <param name="value"></param>
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/// <param name="targetType"></param>
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/// <returns></returns>
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private dynamic? ConvertValue(string value, Type targetType)
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{
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try
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{
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if (!string.IsNullOrEmpty(value))
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{
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return JsonConvert.DeserializeObject(value, targetType);
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}
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else
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{
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return null;
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}
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}
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catch (JsonReaderException ex)
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{
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Console.WriteLine(ex);
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return value;
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}
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catch (JsonSerializationException ex)
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{
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// 如果无法转为对应的JSON对象
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int startIndex = ex.Message.IndexOf("to type '") + "to type '".Length; // 查找类型信息开始的索引
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int endIndex = ex.Message.IndexOf('\''); // 查找类型信息结束的索引
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var typeInfo = ex.Message[startIndex..endIndex]; // 提取出错类型信息，该怎么传出去？
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Console.WriteLine("无法转为对应的JSON对象:" + typeInfo);
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return null;
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}
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catch // (Exception ex)
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{
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return value;
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}
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}
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#region 完整的ExecuteAsync调用方法（不要删除）
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//public virtual async Task<object?> ExecuteAsync(DynamicContext context)
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//{
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// MethodDetails md = MethodDetails;
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// object? result = null;
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// if (DelegateCache.GlobalDicDelegates.TryGetValue(md.MethodName, out Delegate del))
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// {
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// if (md.ExplicitDatas.Length == 0)
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// {
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// if (md.ReturnType == typeof(void))
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// {
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// ((Action<object>)del).Invoke(md.ActingInstance);
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// }
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// else if (md.ReturnType == typeof(Task<FlipflopContext>))
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// {
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// // 调用委托并获取结果
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// FlipflopContext flipflopContext = await ((Func<object, Task<FlipflopContext>>)del).Invoke(MethodDetails.ActingInstance);
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// if (flipflopContext != null)
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// {
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// if (flipflopContext.State == FfState.Cancel)
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// {
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// throw new Exception("this async task is cancel.");
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// }
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// else
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// {
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// if (flipflopContext.State == FfState.Succeed)
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// {
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// CurrentState = true;
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// result = flipflopContext.Data;
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// }
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// else
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// {
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// CurrentState = false;
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// }
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// }
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// }
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// }
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// else
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// {
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// result = ((Func<object, object>)del).Invoke(md.ActingInstance);
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// }
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// }
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// else
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// {
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// object?[]? parameters = GetParameters(context, MethodDetails);
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// if (md.ReturnType == typeof(void))
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// {
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// ((Action<object, object[]>)del).Invoke(md.ActingInstance, parameters);
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// }
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// else if (md.ReturnType == typeof(Task<FlipflopContext>))
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// {
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// // 调用委托并获取结果
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// FlipflopContext flipflopContext = await ((Func<object, object[], Task<FlipflopContext>>)del).Invoke(MethodDetails.ActingInstance, parameters);
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// if (flipflopContext != null)
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// {
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// if (flipflopContext.State == FfState.Cancel)
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// {
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// throw new Exception("取消此异步");
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// }
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// else
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// {
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// CurrentState = flipflopContext.State == FfState.Succeed;
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// result = flipflopContext.Data;
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// }
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// }
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// }
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// else
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// {
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// result = ((Func<object, object[], object>)del).Invoke(md.ActingInstance, parameters);
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// }
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// }
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// context.SetFlowData(result);
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// }
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// return result;
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//}
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#endregion
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}
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}
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/* while (stack.Count > 0) // 循环中直到栈为空才会退出
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{
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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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if(currentNode is CompositeActionNode || currentNode is CompositeConditionNode)
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{
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currentNode.currentState = true;
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}
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else if (currentNode is CompositeConditionNode)
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{
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}
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currentNode.Execute(context);
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// 根据当前节点的执行结果选择下一节点集合
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// 如果 currentState 为真，选择 TrueBranchNextNodes；否则选择 FalseBranchNextNodes
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var nextNodes = currentNode.currentState ? currentNode.TrueBranchNextNodes
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: currentNode.FalseBranchNextNodes;
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// 将下一个节点集合中的所有节点逆序推入栈中
|
||
for (int i = nextNodes.Count - 1; i >= 0; i--)
|
||
{
|
||
stack.Push(nextNodes[i]);
|
||
}
|
||
|
||
}*/ |
