@openhps/core/dist/esm5/nodes/shapes/TimeSyncNode.js

Open Hybrid Positioning System - Core component

import { TimeService } from '../../service';
import { MemoryBufferNode } from './MemoryBufferNode';
/**
 * Time synchronization node.
 * @category Flow shape
 */
export class TimeSyncNode extends MemoryBufferNode {
  constructor(options) {
    super(options);
    this.on('build', this._initTimer.bind(this));
    this.on('destroy', this._stopTimer.bind(this));
  }
  _initTimer() {
    this._timer = setInterval(() => {
      this.triggerUpdate();
    }, this.options.checkInterval || 100);
  }
  _stopTimer() {
    clearInterval(this._timer);
  }
  onPush(frame, options) {
    return new Promise((resolve, reject) => {
      if (frame.createdTimestamp <= TimeService.now()) {
        this.triggerUpdate().then(() => {
          this.outlets.forEach(outlet => outlet.push(frame, options));
          resolve();
        }).catch(reject);
      } else {
        super.onPush(frame).then(() => {
          resolve();
        }).catch(reject);
      }
    });
  }
  triggerUpdate() {
    return new Promise((resolve, reject) => {
      this.shift().then(frame => {
        if (frame) {
          this.outlets.forEach(outlet => outlet.push(frame));
          return this.triggerUpdate();
        } else {
          resolve();
        }
      }).then(resolve).catch(reject);
    });
  }
  next() {
    return new Promise((resolve, reject) => {
      super.next().then(frame => {
        if (frame && frame.createdTimestamp <= TimeService.now()) {
          return resolve(frame);
        }
        resolve(undefined);
      }).catch(reject);
    });
  }
}