import { SignalingWS } from "../models/ws";
import { RoomAccess, SignalingUser, SignalingTrackInfo } from "../types";
export declare function getPayloadFromJwt<T>(jwttoken: string): T;
export declare function getRoomAccessFromToken(roomToken: string): RoomAccess;
export declare function arrayCheck(array: any[], element: any, key: string): boolean;
export declare function removeElementFromArray<T>(array: T[], key: string, value: any): {
    removeElement: T | null;
    newArray: T[];
};
export declare function getElementFromObject<T>(objs: {
    [key: string]: T;
}, targetKey: string, value: any): {
    key: string;
    obj: T;
} | null;
export declare function getElementFromArray<T>(array: T[], key: string, value: any): T | null;
export declare function sendMsgWaitResponse(signaling: SignalingWS, msgName: string, msgBody: any, responseName: string): Promise<any>;
export declare function noop(): void;
export declare function removeUndefinedKey(obj: any, depth?: number): any;
export declare function nextTick(func: () => any): void;
export declare function withTimeout<T>(p: Promise<T>, timeout: number): Promise<T>;
export interface MissingUserEvent {
    join: SignalingUser[];
    leave: SignalingUser[];
    add: SignalingTrackInfo[];
    remove: SignalingTrackInfo[];
    mute: any[];
}
export declare function getMissingUserEvent(currentUserId: string, lastTracksInfo: SignalingTrackInfo[], currentTracksInfo: SignalingTrackInfo[], lastUsers: string[], currentUsers: string[]): MissingUserEvent;
export declare function randomInteger(): number;
export declare function randomStringGen(strLength?: number): string;
export declare function clone(obj: any): any;
export declare function timeout(ms: number): Promise<void>;
/**
 * 对于相同 key 的调用，只会执行一次
 */
export declare function runOnce(func: () => any, key: string): any;
export declare function showPlayWarn(e: any): void;