connect/src/app/subjects/subjects.component.ts

import {Component} from '@angular/core';
import {EnvProperties} from '../openaireLibrary/utils/properties/env-properties';
import {ActivatedRoute, Router} from "@angular/router";
import {CommunityService} from "../openaireLibrary/connect/community/community.service";
import {HelperService} from "../openaireLibrary/utils/helper/helper.service";
import {Meta, Title} from "@angular/platform-browser";
import {SEOService} from "../openaireLibrary/sharedComponents/SEO/SEO.service";
import {PiwikService} from "../openaireLibrary/utils/piwik/piwik.service";
import {PiwikHelper} from "../utils/piwikHelper";
import {StringUtils} from "../openaireLibrary/utils/string-utils.class";
import {Breadcrumb} from "../openaireLibrary/utils/breadcrumbs/breadcrumbs.component";
import {properties} from "../../environments/environment";
import {Subscriber, Subscription} from "rxjs";

@Component({
  selector: 'subjects',
  template: `
    <schema2jsonld *ngIf="url" [URL]="url" [name]="pageTitle" type="other"></schema2jsonld>
    <div style="min-height: 650px;">
      <div class="uk-container uk-container-large uk-section uk-section-small uk-padding-remove-bottom">
				<div class="uk-padding-small uk-padding-remove-horizontal">
					<breadcrumbs [breadcrumbs]="breadcrumbs"></breadcrumbs>
				</div>
			</div>
			<div class="uk-container uk-container-large uk-section uk-section-small">
				<div *ngIf="showLoading" class="uk-margin-large">
					<div class="uk-animation-fade uk-margin-top uk-width-1-1" role="alert">
						<span class="loading-gif uk-align-center"></span>
					</div>
				</div>
				<div *ngIf="!showLoading">
					<h1 class="uk-margin-top">
						Subjects
					</h1>
					<div *ngIf="pageContents && pageContents['top'] && pageContents['top'].length > 0">
						<helper *ngIf="pageContents && pageContents['top'] && pageContents['top'].length > 0"
							[texts]="pageContents['top']">
						</helper>
					</div>
					<div *ngIf="subjects" class="uk-margin-large-top" style=" min-height: 250px;">
						<div class="uk-card uk-card-default uk-card-body">
							<span *ngFor="let subject of subjects let i=index">
								<span *ngIf="subject != ''">
									<a class="portal-link"
										[queryParams]="{f0:'resultsubject',fv0:createParams(subject)}"
										routerLinkActive="router-link-active" [routerLink]="properties.searchLinkToAdvancedResults">
										<span>{{subject}}</span>
									</a>
									<span *ngIf="i < subjects.length-1">, </span>
								</span>
							</span>
						</div>
					</div>
				</div>
			</div>
		</div>
  `
})
export class SubjectsComponent {
  public subjects: string[];
  public communityId = null;
  public showLoading = true;
  
  public properties: EnvProperties = properties;
  public pageContents = null;
  public divContents = null;
  
  public url: string = null;
  public pageTitle: string = "Subjects";
  
  public breadcrumbs: Breadcrumb[] = [{name: 'Home', route: '/'}, {name: 'About - Subjects'}];
  
  subs: Subscription[] = [];
  
  constructor(private route: ActivatedRoute,
              private communityService: CommunityService,
              private _router: Router,
              private helper: HelperService,
              private _meta: Meta,
              private _title: Title,
              private seoService: SEOService,
              private _piwikService: PiwikService) {
  }
  
  ngOnInit() {
    this.showLoading = true;
    this.url = this.properties.domain + this._router.url;
    this.seoService.createLinkForCanonicalURL(this.url);
    this.updateUrl(this.url);
    this.updateTitle(this.pageTitle);
    this.updateDescription("OpenAIRE - Connect, Community Gateway, research community");
    this.subs.push(this.communityService.getCommunityAsObservable().subscribe(community => {
      if (community) {
        this.communityId = community.communityId;
        if (this.properties.enablePiwikTrack && (typeof document !== 'undefined')) {
          this.subs.push(this._piwikService.trackView(this.properties, this.pageTitle, PiwikHelper.getSiteId(this.communityId)).subscribe());
        }
        //this.getDivContents();
        this.getPageContents();
        this.subjects = community.subjects;
        this.showLoading = false;
      }
    }));
  }
  
  createParams(param) {
    return StringUtils.quote(StringUtils.URIEncode(param));
  }
  
  ngOnDestroy() {
    for (let sub of this.subs) {
      if (sub instanceof Subscriber) {
        sub.unsubscribe();
      }
    }
  }
  
  private getPageContents() {
    this.subs.push(this.helper.getPageHelpContents(this.properties, this.communityId, this._router.url).subscribe(contents => {
      this.pageContents = contents;
    }));
  }
  
  private getDivContents() {
    this.subs.push(this.helper.getDivHelpContents(this.properties, this.communityId, this._router.url).subscribe(contents => {
      this.divContents = contents;
    }));
  }
  
  private updateDescription(description: string) {
    this._meta.updateTag({content: description}, "name='description'");
    this._meta.updateTag({content: description}, "property='og:description'");
  }
  
  private updateTitle(title: string) {
    var _title = ((title.length > 50) ? title.substring(0, 50) : title);
    this._title.setTitle(_title);
    this._meta.updateTag({content: _title}, "property='og:title'");
  }
  
  private updateUrl(url: string) {
    this._meta.updateTag({content: url}, "property='og:url'");
  }
}