graph/src/app/home/home.component.ts

import {Component} from '@angular/core';
import {Subscription} from 'rxjs';
import {ActivatedRoute, Router} from '@angular/router';
import {Location} from '@angular/common';
import "rxjs/add/observable/zip";
import {Title, Meta}                  from '@angular/platform-browser';
import {ConfigurationService} from '../openaireLibrary/utils/configuration/configuration.service';
import {  SearchDataprovidersService} from '../openaireLibrary/services/searchDataproviders.service';
import {  SearchProjectsService} from '../openaireLibrary/services/searchProjects.service';
import {  SearchOrganizationsService} from '../openaireLibrary/services/searchOrganizations.service';
import {  RefineFieldResultsService} from '../openaireLibrary/services/refineFieldResults.service';
import {  NumberUtils} from '../openaireLibrary/utils/number-utils.class';

import {  RouterHelper} from '../openaireLibrary/utils/routerHelper.class';
import { EnvProperties} from '../openaireLibrary/utils/properties/env-properties';
import { ErrorCodes} from '../openaireLibrary/utils/properties/errorCodes';
import {PiwikService} from '../openaireLibrary/utils/piwik/piwik.service';
import { SEOService } from '../openaireLibrary/sharedComponents/SEO/SEO.service';
import {SearchResearchResultsService} from "../openaireLibrary/services/searchResearchResults.service";
import {properties} from "../../environments/environment";

@Component({
  selector: 'home',
  templateUrl: 'home.component.html',
  styleUrls: ['home.component.css']
})
export class HomeComponent {
  public pageTitle = "OpenAIRE Research Graph";

  public errorCodes:ErrorCodes = new ErrorCodes();
  public routerHelper:RouterHelper = new RouterHelper();

  public publicationsSize:any = null;
  public datasetsSize:any = null;
  public datasetsLinkedSize:any = null;
  public softwareLinkedSize:any = null;
  public softwareSize: any = null;
  public otherSize: any = null;
  public fundersSize:any = null;
  public projectsSize:any = null;
  public datasourcesSize:any = null;

  properties: EnvProperties = properties;

  subs: Subscription[] = [];

  constructor (
    private route: ActivatedRoute,
    private _router: Router,
    private _searchResearchResultsService: SearchResearchResultsService,
    private _searchDataprovidersService: SearchDataprovidersService,
    private _searchProjectsService: SearchProjectsService,
    private _searchOrganizationsService: SearchOrganizationsService,
    private _refineFieldResultsService:RefineFieldResultsService,
    private location: Location, private _piwikService:PiwikService,
    private config: ConfigurationService, private _meta: Meta, private _title: Title, private seoService: SEOService
  ) {

    let description = "OpenAIRE Research Graph: Over 100M of research deduplicated, 170K research software, 11M research data. One of the largest open scholarly records collection worldwide.";
    let title = "OpenAIRE | Find and Share research";

    this._title.setTitle(title);
    this._meta.updateTag({content:description},"name='description'");
    this._meta.updateTag({content:description},"property='og:description'");
    this._meta.updateTag({content:title},"property='og:title'");
  }

  public ngOnInit() {
        this.seoService.createLinkForCanonicalURL(this.properties.domain + this.properties.baseLink+this._router.url, false);

        if(this.properties){
          var url = this.properties.domain + this.properties.baseLink+this._router.url;
          this._meta.updateTag({content:url},"property='og:url'");
          if(this.properties.enablePiwikTrack && (typeof document !== 'undefined')){
            this.subs.push(this._piwikService.trackView(this.properties, "OpenAIRE").subscribe());
          }


          this.getNumbers();
        }
  }
  public ngOnDestroy() {
    for (let sub of this.subs) {
      sub.unsubscribe();
    }
  }

  private getNumbers() {
    this.subs.push(this._searchResearchResultsService.numOfSearchResults("publication", "", this.properties).subscribe(
      data => {
        if(data && data > 0 ){
          this.publicationsSize = NumberUtils.roundNumber(data);

        }
      },
      err => {
        this.handleError("Error getting number of publications", err);
      }
    ));
    this.subs.push(this._searchResearchResultsService.numOfSearchResults("dataset", "", this.properties).subscribe(
      data => {
        if(data && data > 0 ){
          this.datasetsSize = NumberUtils.roundNumber(data);
        }
      },
      err => {
        //console.log(err);
        this.handleError("Error getting number of research data", err);
      }
    ));
    this.subs.push(this._searchResearchResultsService.numOfSearchResultsLinkedToPub("dataset", this.properties).subscribe(
      data => {
        if(data && data > 0 ){
          this.datasetsLinkedSize = NumberUtils.roundNumber(data);
        }
      },
      err => {
        this.handleError("Error getting number of linkedresearch data", err);
      }
    ));
    this.subs.push(this._searchResearchResultsService.numOfSearchResults("software", "", this.properties).subscribe(
      data => {
        if (data && data > 0) {
          this.softwareSize = NumberUtils.roundNumber(data);
        }
      },
      err => {
        this.handleError("Error getting number of software data", err);
      }
    ));
    this.subs.push(this._searchResearchResultsService.numOfSearchResultsLinkedToPub("software", this.properties).subscribe(
      data => {
        if(data && data > 0 ){
          this.softwareLinkedSize = NumberUtils.roundNumber(data);
        }
      },
      err => {
        this.handleError("Error getting number of linked software", err);
      }
    ));
    this.subs.push(this._searchResearchResultsService.numOfSearchResults("other", "", this.properties).subscribe(
      data => {
        if (data && data > 0) {
          this.otherSize = NumberUtils.roundNumber(data);
        }
      },
      err => {
        this.handleError("Error getting number of software data", err);
      }
    ));
    this.subs.push(this._refineFieldResultsService.getRefineFieldsResultsByEntityName(["funder"],"project", this.properties).subscribe(
      data => {


        if(data[0] && data[0] > 0 ){
          this.projectsSize = NumberUtils.roundNumber(data[0]);
        }
        if(data[1].length > 0 && data[1][0].filterId == "funder" && data[1][0].values ){
          this.fundersSize = NumberUtils.roundNumber(data[1][0].values.length);
        }

      },
      err => {
        this.handleError("Error getting 'funder' field results of projects", err);
      })
    );

    this.subs.push(this._searchDataprovidersService.numOfSearchDataproviders("", this.properties).subscribe(
      data => {
        if(data && data > 0 ){
          this.datasourcesSize = NumberUtils.roundNumber(data);
        }

      },
      err => {
        this.handleError("Error getting number of content providers", err);
      }
    ));
  }

  private handleError(message: string, error) {
    console.error("Home Page: "+message, error);
  }
}