private static SourceGraph GetCompressedGraph()

in DataExtraction/SourceGraphExtractionUtils/GraphDataExtractor.cs [539:586]
42 lines of code
11 McCabe index (conditional complexity)

        private static SourceGraph GetCompressedGraph(SourceGraph graph)
        {
            var compressedGraph = SourceGraph.Create(graph);
            var nodeToReplacement = ComputeNodeCompressionMap(graph);

            foreach (var sourceNode in graph.Nodes)
            {
                var newSourceNode = sourceNode;
                if (sourceNode.IsNode)
                {
                    if (nodeToReplacement.TryGetValue(sourceNode.AsNode(), out var replacementSourceNode))
                    {
                        newSourceNode = replacementSourceNode;
                    }
                }

                foreach (var edge in graph.GetOutEdges(sourceNode))
                {
                    SyntaxNodeOrToken newTargetNode = edge.Target;
                    if (edge.Target.IsNode)
                    {
                        var targetSyntaxNode = edge.Target.AsNode();
                        while (targetSyntaxNode != null && nodeToReplacement.TryGetValue(targetSyntaxNode, out SyntaxNodeOrToken replacementTargetNode))
                        {
                            if (replacementTargetNode.IsNode)
                            {
                                targetSyntaxNode = replacementTargetNode.AsNode();
                            }
                            else
                            {
                                targetSyntaxNode = null;
                            }
                            newTargetNode = replacementTargetNode;
                        }
                    }

                    //Don't make links between replaced nodes into cycles:
                    if (newSourceNode == newTargetNode && sourceNode != edge.Target)
                    {
                        continue;
                    }

                    compressedGraph.AddEdge(newSourceNode, edge.Label, newTargetNode);
                }
            }

            return compressedGraph;
        }