import { Observable } from 'rxjs';
import { BehaviorSubject } from 'rxjs/internal/BehaviorSubject';
import { NgConnection } from '../types/conecction.type';
import { NgDataBase } from '../types/database.type';
import { IndexedDatabase } from '../indexed-database';
export declare class NgDatabaseFactory {
    /** Emits an event when all databases recive has been generated */
    connectionsReady: BehaviorSubject<any>;
    /** Indexed database connection factory */
    private factory;
    /** List of all connections handled by the service */
    private connections;
    /** Default connection name */
    private defaultConnectionName;
    /**
     * Sends the database metadata to create.
     * Once it has been completed, emits the
     * connectionsReady event
     * @param databases Databases metadata
     */
    createConnnections(databases: NgDataBase[]): void;
    /**
     * Find a database connection by name. If there isn't
     * a database name takes the default database name
     * @param dbName Name of the database alias
     */
    getDatabase(dbName?: string): IndexedDatabase;
    /**
     * Open a database connection
     * @param dbName name of the database
     * @param version version of the database
     */
    open(dbName: string, version?: number): Observable<OpenConnectionResponse>;
    /**
     * Generates an Observable collection of database connections
     * @param Databases metadata
     */
    createDataBases(databases: NgDataBase[]): Observable<NgConnection>;
    /**
     * Generates a sigle database conecction client
     */
    private createConnection;
}
interface OpenConnectionResponse {
    success: boolean;
    upgraded: boolean;
    result: IDBDatabase;
}
export {};