How to Generate XML in angular js (angular 6)

How to Generate XML in angular js (angular 6)

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import { Injectable } from '@angular/core';

import * as XMLWriter from 'xml-writer';

import * as FileSaver from 'file-saver';

@Injectable({

  providedIn: 'root'

})

export class XmlService {

  xw = new XMLWriter;

  constructor() { }

  public generateXml(paramData: any, _ReferenceNo) {

    // Start XML Node

    this.xw = new XMLWriter;

    this.xw.startDocument();

    this.xw.startElement('root');

    this.xw.text('*TAP Instruction sheet created and approved on the Tritex IOT Management platform');

    this.generateNode(paramData, true); // For Home

    this.generateNode(paramData, false); // For Visitor

    this.xw.endElement();

    const blob = new Blob([this.xw], { type: 'application/xhtml+xml;charset=UTF-8' });

    FileSaver.saveAs(blob, _ReferenceNo + '.xhtml');

  }

  generateNode(paramData, isHome) {

    const tapValue = paramData.newTAPInstructionForm;

    const taxTreatmentList = paramData.taxTreatmentList;

    const chargingIntervalEnumList = paramData.chargingIntervalEnumList;

    const perEnumList = paramData.perEnumList;

    const serviceList = paramData.serviceList;

    const tapServiceList = paramData.tapServiceList;

    const _entity = isHome ? tapValue.HomeEntity : tapValue.VisitorEntity;

    const _sectionText = isHome ? 'HPMN' : 'VPMN';

    _entity.forEach(element => {

      // this.xw.startElement('section').writeAttribute('S', _sectionText).writeAttribute('OC', element.OperatorCode)

      //   .writeElement('tag', 'Some content');

      // this.xw.endElement();

      this.xw.startElement('section').writeAttribute('S', _sectionText).writeAttribute('OC', element.OperatorCode);

      const ISO = element.OperatorCurrencyISO;

      console.log(ISO);

      // Common Details

      this.xw.startElement('CD').writeAttribute('EDT', element.EffectiveDate);

      if (isHome) {

        this.xw.writeAttribute('PA', tapValue.TradingEntity);

        this.xw.writeAttribute('PB', tapValue.CounterParty);

        this.xw.writeAttribute('O', element.OperatorName);

        this.xw.writeAttribute('TC', element.OperatorCode);

      } else {

        this.xw.writeAttribute('PA', tapValue.TradingEntity);

        this.xw.writeAttribute('PB', tapValue.CounterParty);

        this.xw.writeAttribute('O', element.OperatorName);

        this.xw.writeAttribute('TC', element.OperatorCode);

      }

      // Period

      element.EntityDetails[0].TapService.forEach((eleTapService, periodIndex) => {

        // const tempEleTabDetails = eleTapService.TapService[periodIndex];

        this.xw.startElement('PD');

        this.xw.writeAttribute('P', 'Period' + Number(periodIndex + 1));

        this.xw.writeAttribute('SDT', (eleTapService.StartDate) ? eleTapService.StartDate as string : 'n/a');

        this.xw.writeAttribute('EDT', (eleTapService.EndDate) ? eleTapService.EndDate as string : 'n/a');

        this.xw.writeAttribute('ISO', (ISO) ? ISO as string : 'n/a');

        element.EntityDetails.forEach((eleEntity, entityIndex) => {

          const eleTabDetails = eleEntity.TapService[periodIndex].TapServicePeriodWise;

          this.xw.startElement('RW');

          this.xw.writeAttribute('PA', eleEntity.PartyATAPCode);

          this.xw.writeAttribute('PB', eleEntity.PartyBTAPCode);

          this.xw.writeAttribute('E', (element.Exclusions) ? element.Exclusions : 'n/a');

          this.xw.writeAttribute('T', taxTreatmentList.filter(x => x.EnumID === eleEntity.TaxTreatmentEnumID)

            .map(x => x.DisplayName).toString());

          eleTabDetails.forEach((eleTab) => {

            this.xw.startElement('RD');

            this.xw.writeAttribute('MS', tapServiceList.filter(x => x.EnumID === eleTab.TapServiceEnumID)

              .map(x => x.SubType).toString());

            this.xw.writeAttribute('SS', serviceList.filter(x => x.EnumID === eleTab.ServiceEnumID).map(x => x.DisplayName).toString());

            this.xw.writeElement('R', (eleTab.Rate) ? eleTab.Rate as string : 'n/a');

            if (eleTab.TapServiceEnumID === 7 || eleTab.TapServiceEnumID === 8) {

              this.xw.writeElement('P', perEnumList.filter(x => x.EnumID === eleTab.PerEnumID).map(x => x.DisplayName).toString());

            }

            this.xw.writeElement('I', chargingIntervalEnumList.filter(x => x.EnumID === eleTab.IntervalEnumID)

              .map(x => x.DisplayName).toString());

            this.xw.endElement(); // RD

          });

          this.xw.endElement(); // RW

        });

        this.xw.endElement(); // PD

      });

      this.xw.endElement(); // Common Details

      this.xw.endElement(); // section

    });

  }

}