import { HttpContext, HttpRequest } from '@angular/common/http';
import { RequestPredicate } from '../types';
export interface ContextPredicate {
    /**
     * Returns a cloned request that is marked as handled by this predicate
     *
     * @example
     * const contextPredicate = createContextPredicate();
     * httpClient.request(contextPredicate.getMarkedRequest(new HttpRequest(...)).pipe(...)
     *
     */
    getMarkedRequest: (req: HttpRequest<unknown>) => HttpRequest<unknown>;
    /**
     * Returns a context that is marked as handled by this predicate
     *
     * @example
     * const contextPredicate = createContextPredicate();
     * httpClient.get(..., { context: contextPredicate.getContext() })
     */
    getContext: () => HttpContext;
    /**
     * Marks a context that it is handled by this predicate
     *
     * @example
     * const contextPredicate = createContextPredicate();
     * const context = new HttpContext();
     * contextPredicate.markContext(context);
     * httpClient.get(..., { context })
     */
    markContext: (context: HttpContext) => void;
    /** Returns true if request is marked as handled by this predicate */
    requestPredicate: RequestPredicate;
}
/**
 * Creates a predicate that marks requests as handled by this predicate
 *
 * @example
 *  const contextPredicate = createContextPredicate();
 *
 *  createHttpRetryInterceptorFn({
 *    ...
 *    shouldHandleRequest: contextPredicate.requestPredicate,
 *    ...
 *  })
 *
 *  httpClient.request(contextPredicate.getMarkedRequest(new HttpRequest(...)).pipe(...)
 *
 */
export declare function createContextPredicate(): ContextPredicate;