D-Net

import {Component, Input, Output, EventEmitter, ViewChild} from '@angular/core';

import {Observable}       from 'rxjs/Observable';

import {AlertModal} from '../../utils/modal/alert';

import {OpenaireProperties} from '../../utils/properties/openaireProperties';

import {ReportsService} from '../../services/reports.service';

import {ModalLoading} from '../../utils/modal/loading.component';

import {PiwikService} from '../../utils/piwik/piwik.service';

@Component({

    selector: 'search-download',

    template: `

        <span class="uk-margin-large-right" *ngIf="totalResults > 0 && totalResults <= 10000">

            <span class="clickable" (click)="downloadfile(downloadURLAPI+type+'?format=csv&page=0&size='+totalResults+csvParams,type+'-report-'+totalResults)">

                <span aria-hidden="true" class="glyphicon glyphicon-download"></span>

                <span  class="uk-icon"><svg width="20" height="20" viewBox="0 0 20 20" xmlns="http://www.w3.org/2000/svg" icon="download" ratio="1"><polyline fill="none" stroke="#000" points="14,10 9.5,14.5 5,10"></polyline><rect x="3" y="17" width="13" height="1"></rect><line fill="none" stroke="#000" x1="9.5" y1="13.91" x2="9.5" y2="3"></line></svg></span> (CSV)

            </span>

        </span>

    <!--modal-alert></modal-alert-->

    <modal-loading></modal-loading>

    <modal-alert #AlertModalCsvError></modal-alert>

    `

})

export class SearchDownloadComponent {

    @Input() totalResults:number = 0;

    @Input() csvParams: string;

    @Input() type: string;

    @ViewChild(AlertModal) alertApplyAll;

    private downloadURLAPI: string;

    sub: any;

    downloadFilePiwikSub: any;

    @ViewChild (ModalLoading) loading : ModalLoading ;

    // Alert box when something is wrong with CSV requests

    @ViewChild('AlertModalCsvError') alertCsvError;

    constructor ( private _reportsService: ReportsService, private _piwikService:PiwikService) {}

    ngOnInit() {

        this.downloadURLAPI = OpenaireProperties.getCsvAPIURL();

    }

    ngOnDestroy() {

      if(this.sub) {

        this.sub.unsubscribe();

      }

      if(this.downloadFilePiwikSub) {

        this.downloadFilePiwikSub.unsubscribe();

      }

    }

    denialOfDownload() {

        this.alertApplyAll.isOpen = true;

        this.alertApplyAll.cancelButton = true;

        this.alertApplyAll.okButton = false;

        this.alertApplyAll.alertTitle = "Download Results in CSV";

        this.alertApplyAll.message = "Sorry, but the results are too many! Use the api instead!";

        this.alertApplyAll.cancelButtonText = "Ok";

        console.info("denial of Download");

    }

    downloadfile(url:string,filename:string){

      console.log("Downloading file: "+ url);

      this.openLoading();

      this.setMessageLoading("Downloading CSV file");

      this._reportsService.downloadCSVFile(url).subscribe(

          data => {

              this.closeLoading();

              window.open(window.URL.createObjectURL(data),filename+".csv");

              if(OpenaireProperties.isPiwikTrackEnabled() && (typeof document !== 'undefined')){

                this.downloadFilePiwikSub = this._piwikService.trackDownload(url).subscribe();

              }

          },

          error => {

            console.log("Error downloading the file.");

            this.closeLoading();

            this.confirmOpenCsvError();

          },

          () => console.log('Completed file download.')

      );

    }

    public openLoading(){

      if(this.loading){

        this.loading.open();

      }

    }

    public closeLoading(){

      if(this.loading){

        this.loading.close();

      }

    }

    public setMessageLoading(message: string){

      if(this.loading){

        this.loading.message = message;

      }

    }

    public confirmOpenCsvError(){

      this.alertCsvError.cancelButton = false;

      this.alertCsvError.okButton = true;

      this.alertCsvError.alertTitle = "ERROR DOWNLOADING CSV FILE";

      this.alertCsvError.message = "There was an error in csv downloading. Please try again later.";

      this.alertCsvError.okButtonText = "OK";

      this.alertCsvError.open();

    }

}