export type ErrorResponse = {
    error: string;
}

export function isErrorResponse(data: unknown): data is ErrorResponse {
    return ((data as ErrorResponse).error !== undefined);
}

export type Token = {
    token: string;
    userId: number;
    createdAt: string;
    expiresAt: string;
}

export type User = {
    id: number;
    username: string;
    avatar: string | null;
    createdAt: string;
};

export type Message = {
    id: number;
    channelId: number;
    authorId: number;
    content: string;
    createdAt: string;
};

export type Channel = {
    id: number;
    name: string;
    lastMessageId: number | null;
    createdAt: string;
};