import { ProctoringContext } from "./proctoring";
export interface ExternalCameraCheckReturn {
    result: boolean;
    imageUrl?: string;
}
export declare class ActionMessage {
    message?: string;
    command: string;
}
export declare enum ExternalCameraStatusEnum {
    WAITING = -1,
    STARTED = 0,
    QR_CODE = 1,
    POSITION = 2,
    FINISHED = 3,
    ERROR = 9
}
export declare class ExternalCameraChecker {
    private static isModalOpen;
    private proctoringId;
    private capturePhotoUrl;
    private qrCodeBase64Image;
    private transmissionOk;
    private readonly backend;
    private readonly context;
    private onRealtimeAlertsCallback;
    private onQrCodeReadedCallback;
    private onTakePictureCallback;
    private waitingPositionValidation;
    private externalSessionId;
    private currentStep;
    private resolvePromise;
    private connection;
    constructor(context: ProctoringContext, onRealtimeAlertsCallback: (response: any) => void);
    getExternalCameraSessionId(): string;
    checkTransmission(): Promise<void>;
    startTransmission(proctoringId: string): Promise<void>;
    goToPositionGuide(): Promise<void>;
    private reset;
    takePicture(waitingPositionValidation: boolean, onTakePictureCallback: (response: any) => void): Promise<void>;
    startSession(onQrCodeReadedCallback: (response: any) => void): Promise<string>;
    checkExternalCamera(): Promise<ExternalCameraCheckReturn>;
    private buildInterface;
    private renderCurrentStep;
    private renderQRCodeStep;
    private renderPhotoStep;
    private renderImageStep;
    private nextState;
    initializeWebSocketConnection(): Promise<void>;
    private handleWebSocketAction;
    private handleWebSocketMessage;
    disconnectWebSocket(): Promise<void>;
    closeCheckExternalCamera(): void;
    private applyStyles;
}