Angular Services

The rating service structure

To make the development clear and easy, let's create the service class with empty methods and implement them as we proceed.

Head to the /rating folder inside your source code and create a new class as follows:

// src/app/rating/rating.service.ts 
import {Injectable} from "@angular/core"; 
 
@Injectable() 
export class RatingService { 
  //ToDo: construct the service object 
  constructor() {} 
   
  //ToDo: get the collected news from Firebase db 
  getNews() {} 
 
  //ToDo: get the latest trends to show them inside the template 
  getTrends() {} 
   
  //ToDo: rate the news based on constructed rules 
  rateNews(){} 
} 

The first thing that we need to take care of is the business logic that we are going to use for rating. As we discussed before, the news date ...