import { IRequestState, ISkipQueryFn } from './RxRequestStore';
export declare type PartialKey<Obj, Key extends keyof Obj> = Omit<Obj, Key> & {
    [key in Key]?: Obj[Key];
};
export declare type VarsCondition<Vars> = (vars: Vars) => boolean;
/**
 * Skips the request if the provided condition function returns true.
 * If that happens, sets the store state to the provided value.
 *
 * If you would like for the resulting data to depend on the variables,
 * just provide the generic skipQuery callback and do not use this function.
 *
 * @param condition - function of variables which should return true when the request should be skipped
 * @param value - value to be used when request is skipped
 */
export declare function skipIf<Vars, Data>(condition: VarsCondition<Vars>, value: Data): ISkipQueryFn<Vars, Data>;
/**
 * Skips the request if variables are exactly null.
 * Sets the store state to the provided value
 *
 * @param value - value to hold as the result of the request which never happened
 */
export declare function skipIfNull<Vars, Data>(value?: Data | null): ISkipQueryFn<Vars, Data>;
export interface CheckRequestResult {
    /** Should call loadData to request new data */
    request: boolean;
    /** Should render spinner */
    spinner: boolean;
    /** Should render error */
    error: boolean;
    /** Should render data */
    component: boolean;
}
export declare type CheckRequestStateFn<Vars, Data> = (state: IRequestState<Vars, Data>, variables: Vars | undefined) => CheckRequestResult;
/**
 * Checks request store state in order to determine what to do
 *
 * @param state - request store state
 * @param variables - target variables
 * @returns object with the following boolean fields:
 *  - request - should call loadData to request new data
 *  - spinner - should render spinner
 *  - error - should render error
 *  - component - should render data
 */
export declare function checkRequestState<Vars, Data>(state: IRequestState<Vars, Data>, variables: Vars): CheckRequestResult;