/// <summary>
/// 读取节点的上一步节点信息
/// </summary>
/// <param name="runningActivity">当前节点</param>
/// <param name="hasPassedGatewayNode">是否经由路由节点</param>
/// <returns></returns>
internal List <WfActivityInstance> GetPreviousActivity(WfActivityInstance runningActivity,
bool isSendback,
out bool hasPassedGatewayNode)
{
hasPassedGatewayNode = false;
var transitionList = GetTransitionList(runningActivity.ProcessInsUid).ToList();
string backSrcActivityInstanceId = "";
if (isSendback == true && runningActivity.BackSrcActivityId != null)
{
//节点时曾经发生退回的节点
backSrcActivityInstanceId = runningActivity.BackSrcActivityId;
}
else
{
if (!string.IsNullOrWhiteSpace(runningActivity.MainActivityId))//如果是会签节点找到主节点ID
{
backSrcActivityInstanceId = runningActivity.MainActivityId;
}
else
{
backSrcActivityInstanceId = runningActivity.Fid;
}
}
var aim = new ActivityInstanceManager(_dataAccessor, _loggerFactory);
var runningTransitionList = transitionList.Where(o => o.TargetActivityInsUid == backSrcActivityInstanceId).ToList();
List <WfActivityInstance> previousActivityList = new List <WfActivityInstance>();
foreach (var entity in runningTransitionList)
{
//如果是逻辑节点，则继续查找
if (entity.SourceActivityNodeType == WfActivityType.GatewayNode)
{
GetPreviousOfGatewayActivity(transitionList, entity.SourceActivityNodeId, previousActivityList);
hasPassedGatewayNode = true;
}
else
{
previousActivityList.Add(aim.GetByFid(entity.SourceActivityNodeId));
}
}
return(previousActivityList);
}
private void GetPreviousOfGatewayActivity(IList <WfTransitionInstance> transitionList,
string toActivityId,
List <WfActivityInstance> previousActivityList)
{
var previousTransitionList = transitionList.Where(o => o.TargetActivityNodeId == toActivityId).ToList();
var aim = new ActivityInstanceManager(_dataAccessor, _loggerFactory);
foreach (var entity in previousTransitionList)
{
if (entity.SourceActivityNodeType == WfActivityType.TaskNode ||
entity.SourceActivityNodeType == WfActivityType.PluginNode ||
entity.SourceActivityNodeType == WfActivityType.ScriptNode ||
entity.SourceActivityNodeType == WfActivityType.StartNode)
{
previousActivityList.Add(aim.GetByFid(entity.SourceActivityInsUid));
}
else if (entity.SourceActivityNodeType == WfActivityType.GatewayNode)
{
GetPreviousOfGatewayActivity(transitionList, entity.SourceActivityNodeId, previousActivityList);
}
}
}