import { APIMessage, SystemMessageType } from "../api";
import { Client } from "../Client";
import { BaseMessage } from "./BaseMessage";
import { User } from "./User";
export declare class SystemMessage extends BaseMessage {
    constructor(client: Client, data: APIMessage);
    get detail(): {
        type: SystemMessageType.Text;
        content: string;
    } | {
        type: SystemMessageType.UserAdded;
        user: User;
        by: User;
    } | {
        type: SystemMessageType.UserRemoved;
        user: User;
        by: User;
    } | {
        type: SystemMessageType.UserJoined;
        user: User;
    } | {
        type: SystemMessageType.UserLeft;
        user: User;
    } | {
        type: SystemMessageType.UserKicked;
        user: User;
    } | {
        type: SystemMessageType.UserBanned;
        user: User;
    } | {
        type: SystemMessageType.GroupRenamed;
        name: string;
        by: User;
    } | {
        type: SystemMessageType.GroupDescriptionChange;
        by: User;
    } | {
        type: SystemMessageType.GroupIconChange;
        by: User;
    } | {
        type: SystemMessageType.GroupOwnershipChange;
        from: User;
        to: User;
    };
}