public FScheme.Expression Compile()
{
IEnumerable <string> inputNames = null;
IEnumerable <string> outputNames = null;
// Get the internal nodes for the function
WorkspaceModel functionWorkspace = this.WorkspaceModel;
#region Find outputs
// Find output elements for the node
List <Output> outputs = functionWorkspace.Nodes.OfType <Output>().ToList();
var topMost = new List <Tuple <int, NodeModel> >();
// if we found output nodes, add select their inputs
// these will serve as the function output
if (outputs.Any())
{
topMost.AddRange(
outputs.Where(x => x.HasInput(0)).Select(x => x.Inputs[0]));
outputNames = outputs.Select(x => x.Symbol);
}
else
{
// if there are no explicitly defined output nodes
// get the top most nodes and set THEM as the output
IEnumerable <NodeModel> topMostNodes = functionWorkspace.GetTopMostNodes();
NodeModel infinite = null;
var outNames = new List <string>();
foreach (NodeModel topNode in topMostNodes)
{
if (topNode is Function && (topNode as Function).Definition == this)
{
infinite = topNode;
continue;
}
foreach (int output in Enumerable.Range(0, topNode.OutPortData.Count))
{
if (!topNode.HasOutput(output))
{
topMost.Add(Tuple.Create(output, topNode));
outNames.Add(topNode.OutPortData[output].NickName);
}
}
}
if (infinite != null && outNames.Count == 0)
{
topMost.Add(Tuple.Create(0, infinite));
outNames.Add("∞");
}
outputNames = outNames;
}
#endregion
// color the node to define its connectivity
foreach (var ele in topMost)
{
ele.Item2.ValidateConnections();
}
//Find function entry point, and then compile
var variables = functionWorkspace.Nodes.OfType <Symbol>().ToList();
inputNames = variables.Select(x => x.InputSymbol);
//Update existing function nodes which point to this function to match its changes
dynSettings.Controller.DynamoModel.AllNodes
.OfType <Function>()
.Where(el => el.Definition != null && el.Definition.FunctionId == this.FunctionId)
.ToList()
.ForEach(node =>
{
node.SetInputs(inputNames);
node.SetOutputs(outputNames);
node.RegisterAllPorts();
});
//Call OnSave for all saved elements
functionWorkspace.Nodes.ToList().ForEach(x => x.onSave());
INode top;
var buildDict = new Dictionary <NodeModel, Dictionary <int, INode> >();
if (topMost.Count > 1)
{
InputNode node = new ExternalFunctionNode(FScheme.Value.NewList);
int i = 0;
foreach (var topNode in topMost)
{
string inputName = i.ToString(CultureInfo.InvariantCulture);
node.AddInput(inputName);
node.ConnectInput(inputName, new BeginNode());
try
{
var exp = topNode.Item2.Build(buildDict, topNode.Item1);
node.ConnectInput(inputName, exp);
}
catch
{
}
i++;
}
top = node;
}
else if (topMost.Count == 1)
{
top = topMost[0].Item2.Build(buildDict, topMost[0].Item1);
}
else
{
// if the custom node is empty, it will initially be an empty begin
top = new BeginNode();
}
// if the node has any outputs, we create a BeginNode in order to evaluate all of them
// sequentially (begin evaluates a list of expressions)
if (outputs.Any())
{
var beginNode = new BeginNode();
List <NodeModel> hangingNodes = functionWorkspace.GetHangingNodes().ToList();
foreach (var tNode in hangingNodes.Select((x, index) => new { Index = index, Node = x }))
{
beginNode.AddInput(tNode.Index.ToString(CultureInfo.InvariantCulture));
beginNode.ConnectInput(
tNode.Index.ToString(CultureInfo.InvariantCulture),
tNode.Node.Build(buildDict, 0));
}
beginNode.AddInput(hangingNodes.Count.ToString(CultureInfo.InvariantCulture));
beginNode.ConnectInput(hangingNodes.Count.ToString(CultureInfo.InvariantCulture), top);
top = beginNode;
}
// make the anonymous function
FScheme.Expression expression = Utils.MakeAnon(
variables.Select(x => x.GUID.ToString()),
top.Compile());
return(expression);
}