src/lib/helpers/getNodesAssociatedWith.ts

import type { Edge, Node } from '@xyflow/svelte';

export const getNodesAssociatedWith = (nodeId: string, allNodes: Node[], allEdges: Edge[]) => {
	const nodeIdsToDelete = new Set<string>();
	const queue = [nodeId];

	while (queue.length > 0) {
		const currentId = queue.shift()!;
		const outgoingEdges = allEdges.filter((e) => e.source === currentId);
		for (const edge of outgoingEdges) {
			if (!nodeIdsToDelete.has(edge.target)) {
				nodeIdsToDelete.add(edge.target);
				queue.push(edge.target);
			}
		}
	}

	return allNodes.filter((node) => nodeIdsToDelete.has(node.id));
};