state.service.ts

import { ACTIVE_MENU_KEY, MENU_ITEMS } from './model';
import { Injectable, OnDestroy } from '@angular/core';
import { OStore} from "@fireflysemantics/slice";
import { Observable } from "rxjs";

@Injectable({
  providedIn: 'root'
})
export class StateService {
  public ostore:OStore = new OStore();
  public activeMenu$:Observable<string>;

  constructor() {
    this.ostore.post(
      ACTIVE_MENU_KEY, 
      MENU_ITEMS.BLOG);
      this.activeMenu$ = this.ostore.observe(ACTIVE_MENU_KEY);  
  } 
}