Function canAddNode

ts/workflow-builder/src/utils/graphOperations.ts:93–100

(store: CanvasStore, nodeDef: NodeDefinition)

/** Check if a node definition can be added to the store (respects isUnremovable and isSingleton). */
export function canAddNode(store: CanvasStore, nodeDef: NodeDefinition): boolean {
  if (nodeDef.isUnremovable) return false;
  if (nodeDef.isSingleton) {
    const { nodes } = store.getState();
    if (nodes.some((n) => n.data.type === nodeDef.type)) return false;
  }
  return true;
}

/** Add a node to the store given a node definition and optional position. Returns the new node ID, or null if the node cannot be added. */
export function addNodeToStore(store: CanvasStore, nodeDef: NodeDefinition, position?: { x: number; y: number }): string | null {