feat: add scheduler

dag/ui.go

@@ -131,11 +131,24 @@ func (tm *DAG) ExportDOT() string {
 	sb.WriteString(fmt.Sprintf("digraph \"%s\" {\n", tm.name))
 	sb.WriteString("  node [shape=box, style=\"rounded,filled\", fillcolor=lightgray, fontname=\"Helvetica\"];\n")
 	sortedNodes := tm.TopologicalSort()
+
+	// Export nodes
 	for _, nodeKey := range sortedNodes {
 		node := tm.nodes[nodeKey]
 		nodeColor := "lightblue"
 		sb.WriteString(fmt.Sprintf("  \"%s\" [label=\"%s\", fillcolor=\"%s\"];\n", node.Key, node.Name, nodeColor))
+
+		// If the node has a sub-DAG, export it
+		if subDAG, ok := node.processor.(*DAG); ok && subDAG != nil {
+			subDAGName := fmt.Sprintf("%s_sub", node.Key)
+			sb.WriteString(fmt.Sprintf("  subgraph \"%s\" {\n", subDAGName))
+			sb.WriteString(fmt.Sprintf("    label=\"%s\"\n", node.Name))
+			sb.WriteString(subDAG.ExportDOT()) // Export the sub-DAG
+			sb.WriteString("  }\n")
 		}
+	}
+
+	// Export edges
 	for _, nodeKey := range sortedNodes {
 		node := tm.nodes[nodeKey]
 		for _, edge := range node.Edges {
@@ -146,23 +159,17 @@ func (tm *DAG) ExportDOT() string {
 			default:
 				edgeStyle = "solid"
 			}
-			for _, to := range edge.To {
 			edgeColor := "black"
-				if edge.Label == "Iterate" {
-					edgeColor = "blue"
-				} else if edge.Label == "PASS" {
-					edgeColor = "green"
-				} else if edge.Label == "FAIL" {
-					edgeColor = "red"
-				}
+			for _, to := range edge.To {
 				sb.WriteString(fmt.Sprintf("  \"%s\" -> \"%s\" [label=\"%s\", color=\"%s\", style=%s];\n", node.Key, to.Key, edge.Label, edgeColor, edgeStyle))
 			}
 		}
 	}
+
+	// Handle conditional edges
 	for fromNodeKey, conditions := range tm.conditions {
 		for when, then := range conditions {
 			if toNode, ok := tm.nodes[string(then)]; ok {
-
 				sb.WriteString(fmt.Sprintf("  \"%s\" -> \"%s\" [label=\"%s\", color=\"purple\", style=dotted];\n", fromNodeKey, toNode.Key, when))
 			}
 		}

examples/dag.go

@@ -51,6 +51,7 @@ func sync() {
 	f := dag.NewDAG("Sample DAG", "sample-dag", mq.WithSyncMode(true), mq.WithNotifyResponse(tasks.NotifyResponse))
 	setup(f)
 	sendData(f)
+	fmt.Println(f.SaveSVG("dag.svg"))
 }
 
 func async() {