import {fromJSON as behaviorItemFromJSON} from './registry';
import {Traversal} from './traversal';

export class TraversalAndSet extends Traversal {

  static type() {
    return 'traversal-and-set';
  }

  constructor() {
    super();
    this.value = undefined;
  }

  fromJSON(json) {
    super.fromJSON(json);
    this.value = behaviorItemFromJSON(json.value);
    return this;
  }

  traverse(context) {
    if (context) {
      return context.traverseAndSet(this.steps, this.value);
    }
  }

  toJSON() {
    return {
      ...super.toJSON(),
      type: 'traversal-and-set',
      value: this.value.toJSON(),
    };
  }
}