initial commit

src/Graphviz.tsx

@@ -0,0 +1,24 @@
+export function graphToDot(g) {
+  // Directed graph, use neato layout so we can use pos attributes
+  const lines = [];
+  lines.push('digraph G {');
+  lines.push('  graph [splines=true, overlap=false, rankdir=LR];');
+  lines.push('  node [shape=rectangle, style=filled, fillcolor="white", fontsize=12];');
+
+  // nodes
+  for (const n of g.nodes) {
+    const attrs = [];
+    attrs.push(`label=\"${n.label}\"`);
+    attrs.push(`id=\"${n.id}\"`)
+    lines.push(`  \"${n.id}\" [${attrs.join(', ')}];`);
+  }
+
+  // edges
+  for (const e of g.edges) {
+    lines.push(`  \"${e.from}\" -> \"${e.to}\";`);
+  }
+
+  // close
+  lines.push('}');
+  return lines.join('\n');
+}