preferences.service.ts

import { Injectable } from '@angular/core';
import { BehaviorSubject, Observable } from 'rxjs';

import { IdP } from '../types/types.module';

export const prefsKey = "feudalPrefs";

export interface Prefs {
  showEmptyVOs?: boolean;
  preferredIdP?: IdP;
};

@Injectable({
  providedIn: 'root'
})
export class PreferencesService {

  private prefs: Prefs = {};
  private prefs$ = new BehaviorSubject<Prefs>(this.prefs);

  constructor() {
    this.load();
  }

  public save(prefs: Prefs): void {
    localStorage.setItem(prefsKey, JSON.stringify(prefs));
    console.log("Saved preferences:", prefs);
  }

  public load(): void {
    const loaded = JSON.parse(localStorage.getItem(prefsKey));
    if (loaded != null) {
      this.prefs = loaded;
      this.prefs$.next(loaded);
      console.log("Loaded preferences:", this.prefs);
    } else {
      console.log("No preferences to load");
    }
  }

  public setPreferredIdP(idp: IdP): void {
    this.prefs.preferredIdP = idp;
    this.save(this.prefs);
    this.prefs$.next(this.prefs);
  }

  public connect(): Observable<Prefs> {
    return this.prefs$.asObservable();
  }
}