import type { DatabaseSync } from "node:sqlite";
import type { CreateUserInput, UpdateUserInput, UserWithConnectorKeysDbRecord } from "./databaseTypes.js";
/**
 * Users repository backed by SQLite with write-through caching.
 * Expects: schema migrations already applied for users and user_connector_keys.
 */
export declare class UsersRepository {
    private readonly db;
    private readonly usersById;
    private readonly userIdByConnectorKey;
    private readonly userIdByNametag;
    private readonly userLocks;
    private readonly cacheLock;
    private readonly createLock;
    private allUsersLoaded;
    constructor(db: DatabaseSync);
    findById(id: string): Promise<UserWithConnectorKeysDbRecord | null>;
    findByConnectorKey(key: string): Promise<UserWithConnectorKeysDbRecord | null>;
    findByNametag(nametag: string): Promise<UserWithConnectorKeysDbRecord | null>;
    findMany(): Promise<UserWithConnectorKeysDbRecord[]>;
    findOwner(): Promise<UserWithConnectorKeysDbRecord | null>;
    create(input: CreateUserInput): Promise<UserWithConnectorKeysDbRecord>;
    update(id: string, data: UpdateUserInput): Promise<void>;
    delete(id: string): Promise<void>;
    findByParentUserId(parentUserId: string): Promise<UserWithConnectorKeysDbRecord[]>;
    addConnectorKey(userId: string, connectorKey: string): Promise<void>;
    private userLockForId;
    private userLoadById;
    private userCacheSet;
}
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