@openhps/core/dist/esm5/nodes/CallbackNode.js

Open Hybrid Positioning System - Core component

import { Node } from '../Node';
/**
 * @category Node
 */
export class CallbackNode extends Node {
  constructor(pushCallback = () => true, pullCallback = () => null, options) {
    super(options);
    this.pushCallback = pushCallback;
    this.pullCallback = pullCallback;
    this.on('push', this._onPush.bind(this));
    this.on('pull', this._onPull.bind(this));
    this.options.autoPush = this.options.autoPush || true;
  }
  _onPush(frame, options) {
    return new Promise((resolve, reject) => {
      Promise.resolve(this.pushCallback(frame, options)).then(() => {
        if (this.options.autoPush) {
          return Promise.all(this.outlets.map(outlet => outlet.push(frame, options)));
        } else {
          resolve();
        }
      }).then(() => {
        resolve();
      }).catch(reject);
    });
  }
  _onPull(options) {
    return new Promise((resolve, reject) => {
      Promise.resolve(this.pullCallback(options)).then(result => {
        if (result !== undefined && result !== null) {
          // Push result
          Promise.all(this.outlets.map(outlet => outlet.push(result, options))).then(() => {
            resolve();
          }).catch(reject);
        } else {
          // Forward pull
          Promise.all(this.inlets.map(inlet => inlet.pull(options))).then(() => {
            resolve();
          }).catch(reject);
        }
      }).catch(reject);
    });
  }
}