import { AngularFirestore, AngularFirestoreCollection } from '@angular/fire/firestore';
import { Observable } from 'rxjs';
import { IBaseService } from './ibase-service';
import { IEntity } from '../interface/ientity';
export declare abstract class BaseService<T extends IEntity> implements IBaseService<T> {
    protected afs: AngularFirestore;
    protected collection: AngularFirestoreCollection<T>;
    create(identifier: string, item: T): Promise<T>;
    get(identifier: string): Observable<T>;
    list(): Observable<T[]>;
    update(item: T): Promise<T>;
    delete(id: string): void;
    slug(str: string): string;
    constructor(path: string, afs: AngularFirestore);
}