The evidence component

As we know, the news link itself comes from items saved under the /Notifier/rated-news path. So let's pull out the news item with the highest rank from rated-news and pass it to the service for counting its words. To do so, open the component file and edit the contents as follows:

// src/app/evidence/evidence.component.ts 
import {Component} from '@angular/core'; 
import {EvidenceService} from "./evidence.service"; 
import {AngularFire} from "angularfire2"; 
 
@Component({ 
  selector: 'sh-evidence', 
  templateUrl: 'evidence.html' 
}) 
export class EvidenceComponent implements OnInit{ 
  private angularFire; 
  private evidenceService; 
 
  constructor (es:EvidenceService, af: AngularFire) { 
    this.evidenceService = es; 
    this.angularFire = af; 
  } 
 
  ngOnInit() { 
    this.angularFire.database.list('/Notifier/rated-news', { 
      query: { 
        orderByChild: 'rank', 
        limitToFirst: 1 // lets fetch 1 item for now 
      }}).subscribe(data =>...