import { HttpClient, HttpHeaders } from '@angular/common/http';
import { Observable } from 'rxjs';
/**
 * Rc api service
 * make API calls, support cache
 */
export declare class RcApiService {
    protected http: HttpClient;
    /**
     * api base url
     */
    private _apiBaseUrl;
    /**
     * cache data, save responses in cache for future use
     */
    private cacheData;
    constructor(http: HttpClient);
    /**
     * set base url of API
     */
    apiBaseUrl: string;
    /**
      make a GET request
     * @param actionName
     * @param requestParams
     * @param force
     * @param customCallHeaders
     * @returns Observable
     */
    get(actionName: any, requestParams?: {}, force?: boolean, customCallHeaders?: Object): Observable<Object>;
    /**
     * make a POST request
     * @param actionName
     * @param requestParams
     * @param customCallHeaders
     * @returns Observable
     */
    post(actionName: any, requestParams?: {}, customCallHeaders?: Object): Observable<Object>;
    /**
     * make a PUT request
     * @param actionName
     * @param requestParams
     * @param customCallHeaders
     * @returns Observable
     */
    put(actionName: any, requestParams?: {}, customCallHeaders?: Object): Observable<Object>;
    /**
     * make a DELETE request
     * @param actionName
     * @param requestParams
     * @param customCallHeaders
     * @returns Observable
     */
    delete(actionName: any, requestParams?: {}, customCallHeaders?: Object): Observable<Object>;
    /**
     * get base url - can be extended / override by a child
     * @returns string
     */
    protected getBaseUrl(): string;
    /**
     * get request headers - can be extended / override by child class
     * @returns HttpHeaders
     */
    protected getHeaders(customCallHeaders: Object): HttpHeaders;
    protected setDefaultHeaders(headers: any): void;
    protected setCustomHeaders(headers: any): void;
    /**
     * clear api cache
     */
    clearCache(): void;
}