Debounced, distinct search presenter

search.presenter.ts

import { Subject } from 'rxjs';
import { debounceTime, distinctUntilChanged } from 'rxjs/operators';

export class SearchPresenter {
  private _searchQuery: Subject<string> = new Subject();

  searchQuery: Observable<string> = this._searchQuery.pipe(
    debounceTime(150),
    distinctUntilChanged(),
  );
    
  search(query: string): void {
    this._searchQuery.next(query);
  }
}