org.eclipse.mdm.application/src/main/webapp/src/app/chartviewer/services/chart-viewer.service.ts

import { Injectable } from '@angular/core';
import { Node } from '../../navigator/node';
import { Subject } from 'rxjs';
import { MeasuredValues, ChartData, ChartXyDataSet, ChartPoint } from '../model/chartviewer.model';
import { getDataArray } from './chart-viewer-data.service';
import { zip } from 'rxjs/operators';

@Injectable({
  providedIn: 'root'
})
export class ChartViewerService {

  private nodeMetaSubject = new Subject<Node>();

  constructor() {}

  public sendNodeMeta(nodeMeta: Node) {
    this.nodeMetaSubject.next(nodeMeta);
  }

  public onNodeMetaChange() {
    return this.nodeMetaSubject.asObservable();
  }

  public toXyDataSet(xData: number[], yData: MeasuredValues) {
    const yValues = getDataArray(yData).values as number[];
    const points = this.getDataPoints(xData, yValues);
    const dataset = new ChartXyDataSet(yData.name, points);
    return dataset;
  }

  private getDataPoints(xData: number[], yData: number[], startIndex = 0) {
    if (xData != undefined && xData.length <= yData.length) {
      return xData.map((x, i) => new ChartPoint(x, yData[i]));
    } else if (xData != undefined && xData.length > yData.length) {
      return yData.map((y, i) => new ChartPoint(xData[i], y));
    }
  }
}