82 lines
1.6 KiB
JavaScript
82 lines
1.6 KiB
JavaScript
import {fromJSON as behaviorItemFromJSON} from './registry';
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export class Traversal {
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static type() {
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return 'traversal';
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}
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constructor() {
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this.steps = [];
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this.value = undefined;
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}
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clone(other) {
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this.steps = other.steps.map((step) => {
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switch (step.type) {
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case 'key':
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return step;
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case 'invoke':
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return {
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type: 'invoke',
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args: step.args.map((arg, index) => {
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const Item = arg.constructor;
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const item = new Item();
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item.clone(arg);
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return item;
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}),
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};
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}
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});
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if (other.value) {
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this.value = other.value.clone();
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}
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}
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fromJSON(json) {
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this.steps = json.steps.map((step) => {
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switch (step.type) {
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case 'key':
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return step;
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case 'invoke':
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return {
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type: 'invoke',
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args: step.args.map((arg) => behaviorItemFromJSON(arg)),
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};
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}
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});
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if (json.value) {
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this.value = behaviorItemFromJSON(json.value);
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}
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return this;
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}
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get(context) {
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return this.traverse(context);
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}
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traverse(context) {
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if (context) {
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return context.traverse(this);
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}
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}
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toJSON() {
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return {
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type: 'traversal',
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steps: this.steps.map((step) => {
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switch (step.type) {
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case 'key':
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return step;
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case 'invoke':
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return {
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type: 'invoke',
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args: step.args.map((arg) => arg.toJSON()),
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};
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}
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}),
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value: this.value ? this.value.toJSON() : undefined,
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};
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}
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}
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