private FlowDiagramNode AddFlowDiagramDecisionNode(int stepIndex, IFlowDefinition flowDefinition, FlowDiagram flowDiagram,
FlowStep flowStep, DecisionFlowStepBase decisionFlowStep, ref int endCount)
{
var decisionRequest = GetFlowStepRequest(flowStep.Definition);
var decisionNode = flowDiagram.AddNode(new FlowDiagramNode
{
NodeType = FlowDiagramNodeType.Decision,
Name = flowStep.Name,
Text = GetFlowDiagramNodeText(flowStep, decisionRequest),
OverrideKey = flowStep.OverrideKey?.Value,
OverrideDescription = flowStep.OverrideKey?.Description,
});
SetFlowDiagramNodeInputSummaries(flowStep, decisionRequest, decisionNode);
foreach (var branch in decisionFlowStep.Branches)
{
if (branch.IsUnhandled)
{
continue;
}
var linkCriteria = branch.Targets?.ToList().ConvertAll(c => c?.ToString());
if (branch.IsEnd)
{
var endNode = AddFlowDiagramEndNode(flowDiagram, ref endCount);
decisionNode.Links.Add(new FlowDiagramLink
{
TargetNodeName = endNode.Name,
Criteria = linkCriteria
});
}
else
{
if (string.IsNullOrEmpty(branch.NextStepName))
{
endCount = AddFlowDiagramDefaultLink(decisionNode, stepIndex, flowDefinition, flowDiagram, endCount);
}
else
{
decisionNode.Links.Add(new FlowDiagramLink
{
TargetNodeName = branch.NextStepName,
Criteria = linkCriteria
});
}
}
}
return(decisionNode);
}
private int CheckDecision(int flowStepIndex, DecisionFlowStepBase decisionFlowStep, FlowDefinition <TFlowRequest, TFlowResponse> flowDefinition,
FlowContext stepFlowContext, FlowValues flowValues, FlowTrace flowTrace)
{
var decisionRequest = (FlowDecisionBase)CreateRequest(stepFlowContext, decisionFlowStep, flowValues);
// TODO: Pass the targets directly into GetMatchingBranchIndex
decisionFlowStep.Branches.ForEach(b => decisionRequest.AddBranch(b.Targets));
_logger?.LogDecisionRequest(stepFlowContext, decisionRequest);
var branchIndex = decisionRequest.GetMatchingBranchIndex();
if (branchIndex < 0 || branchIndex >= decisionFlowStep.Branches.Count)
{
throw new FlowException($"The branch index returned was out of bounds of the branch array: {branchIndex}");
}
var branch = decisionFlowStep.Branches[branchIndex];
flowTrace.AddStep(new FlowTraceStep
{
StepType = FlowTraceStepType.Decision, Name = decisionFlowStep.Name, BranchTargets = branch.Targets
});
_logger?.LogDecisionResponse(stepFlowContext, branch);
if (branch.IsEnd)
{
return(int.MaxValue);
}
if (branch.IsUnhandled)
{
throw new FlowUnhandledElseException($"Unhandled ELSE for decision '{decisionFlowStep.Name}'");
}
var isContinue = (branch.NextStepName == null);
if (isContinue)
{
return(flowStepIndex + 1);
}
var nextFlowStepIndex = flowDefinition.GetStepIndex(branch.NextStepName);
return(nextFlowStepIndex);
}