/**
 * The member list, cut into role groups. Offline leaves its role and goes to one group at
 * the end: the question the list answers is who is around.
 */
/**
 * What this needs to know about a member, and no more, structurally. A `status` this does
 * not recognise counts as present, `undefined` included — that is an old server.
 */
export interface GroupableMember {
    nickname?: string | null;
    role?: string | null;
    status?: string | null;
}
/** What this needs to know about a role. `server:details` sends all four. */
export interface GroupableRole {
    id: string;
    rank: number;
    name?: string | null;
    color?: string | null;
}
/**
 * One block of the member list: a heading and the people under it. Generic over the member,
 * so a caller gets its own type back. `color` is the role's own, or null.
 */
export interface MemberGroup<M> {
    key: string;
    title: string;
    color: string | null;
    members: M[];
}
/**
 * The key on the group holding anybody not offline, when the server named no
 * roles. Exported so a caller styling that group does not spell it again.
 */
export declare const UNGROUPED_GROUP_KEY = "__ungrouped__";
/** The key on the offline group, which callers draw faded. */
export declare const OFFLINE_GROUP_KEY = "__offline__";
export declare function groupMembersByRole<M extends GroupableMember, R extends GroupableRole>(members: readonly M[], roles: readonly R[]): MemberGroup<M>[];