Angular 7 - Implementing periodic JSON data retrieval from server and maintaining local storage within Angular application

Seeking guidance on how to handle updating a static json file stored in the assets directory in an Angular 7 project. The goal is to periodically fetch a json from a server, check for updates, and perform post-processing on the data in the static file (essentially creating a modified copy). I'm looking for the best approach to achieve this, with the requirement of only performing the update and post-processing once a day or week.

The current method of importing the static json is as follows:

import mlbPlayers from '../../assets/data/players-mlb.json';

I'd like to implement a solution similar to what's discussed in this thread, but tailored specifically for Angular.

javascriptangulartypescript

Answer №1

Sign up for fileData$ notifications

const API_URL = './assets/data/db.json';
public fileData = new ReplaySubject<any>(1);
fileData$: Observable<any> = this.fileData.asObservable();

constructor(private http: HttpClient) { 
   this.getFileData();
}

//Fetches data every 5 seconds
getFileData(): void {
     Observable.interval(5000)
        .switchMap(() => this.http.get(API_URL).subscribe(res => {
       this.fileData.next(res);
     }));
}

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