bpmn-optimizer/src/v1/io/serialize/json/GraphJsonSerializer.ts

import Edge from "../../../graph/Edge.js";
import Graph from "../../../graph/Graph.js";
import Node from "../../../graph/Node.js";
import { JsonSerializer } from "./JsonSerializer.js";

type NodeJson = { id: string, x: number, y: number };
type EdgeJson = { id: string, from: NodeJson["id"], to: NodeJson["id"] };
type GraphJson = { nodes: NodeJson[], edges: EdgeJson[] };

export default class GraphJsonSerializer implements JsonSerializer<Graph<Node, Edge<Node>>> {
	serialize(data: Graph<Node, Edge<Node>>): string {
		const graphJson: GraphJson = {
			nodes: data.getNodes().map((node) => { return { id: node.id, x: node.x, y: node.y } }),
			edges: data.getEdges().map((edge) => {
				return { id: edge.id, from: edge.from, to: edge.to };
			})
		}

		return JSON.stringify(graphJson);
	}
}