import RealtimeVolumeIndicator from './RealtimeVolumeIndicator';
/**
 * [[RealtimeState]] stores all realtime persistent state.
 */
export default class RealtimeState {
    /**
     * Stores the attendee id of the current user
     */
    localAttendeeId: string | null;
    /**
     * Callbacks to listen for attendee id changes
     */
    attendeeIdChangesCallbacks: ((attendeeId: string, present: boolean) => void)[];
    /**
     * Stores whether the user can transition from muted to unmuted
     */
    canUnmute: boolean;
    /**
     * Callbacks to listen for changes to can-unmute local audio state
     */
    setCanUnmuteLocalAudioCallbacks: ((canUnmute: boolean) => void)[];
    /**
     * Stores whether the user is presently muted
     */
    muted: boolean;
    /**
     * Callbacks to listen for local audio mutes and unmutes
     */
    muteAndUnmuteLocalAudioCallbacks: ((muted: boolean) => void)[];
    /**
     * Stores the active audio input
     */
    audioInput: MediaStream | null;
    /**
     * Stores per-attendee id volume indicator state
     */
    volumeIndicatorState: {
        [key: string]: RealtimeVolumeIndicator;
    };
    /**
     * Stores per-attendee id callbacks called when volume indicators change
     */
    volumeIndicatorCallbacks: {
        [key: string]: ((attendeeId: string, volume: number | null, muted: boolean | null, signalStrength: number | null) => void)[];
    };
    /**
     * Callbacks to listen for changes to local signal strength
     */
    localSignalStrengthChangeCallbacks: ((signalStrength: number) => void)[];
    /**
     * Callbacks to listen for fatal errors
     */
    fatalErrorCallbacks: ((error: Error) => void)[];
}