import { BaseConfigurable } from './BaseConfigurable';
import { CacheConfigurable } from './CacheConfigurable';
import { NgForageOptions } from './NgForageOptions';
/**
 * Global/default configuration
 */
export declare class NgForageConfig implements BaseConfigurable, CacheConfigurable {
    /** The IndexedDB driver */
    static readonly DRIVER_INDEXEDDB: string;
    /** The localStorage driver */
    static readonly DRIVER_LOCALSTORAGE: string;
    /** The WebSQL driver */
    static readonly DRIVER_WEBSQL: string;
    /**
     * Cache time in milliseconds
     * @default 300000
     */
    cacheTime: number;
    /**
     * Get the compiled configuration
     */
    readonly config: NgForageOptions;
    /**
     * A description of the database, essentially for developer usage.
     * @default
     */
    description: string;
    /**
     * The preferred driver(s) to use.
     * @see {@link NgForageConfig#DRIVER_INDEXEDDB}
     * @see {@link NgForageConfig#DRIVER_WEBSQL}
     * @see {@link NgForageConfig#DRIVER_LOCALSTORAGE}
     */
    driver: string | string[];
    /**
     * The name of the database. May appear during storage limit prompts. Useful to use the name of your app here.
     * In localStorage, this is used as a key prefix for all keys stored in localStorage.
     * @default ngForage
     */
    name: string;
    /**
     * The size of the database in bytes. Used only in WebSQL for now.
     * @default 4980736
     */
    size: number;
    /**
     * The name of the datastore.
     * In IndexedDB this is the dataStore,
     * in WebSQL this is the name of the key/value table in the database.
     * Must be alphanumeric, with underscores.
     * Any non-alphanumeric characters will be converted to underscores.
     * @default ng_forage
     */
    storeName: string;
    /**
     * The version of your database. May be used for upgrades in the future; currently unused.
     * @default 1.0
     */
    version: number;
    static factory(): NgForageConfig;
    /**
     * Bulk-set configuration options
     * @param opts The configuration
     */
    configure(opts: NgForageOptions): this;
    /**
     * Define a driver
     *
     * You’ll want to make sure you accept a callback argument and that you pass the same arguments to callbacks as the
     * default drivers do. You’ll also want to resolve or reject promises.
     * Check any of the {@link https://github.com/mozilla/localForage/tree/master/src/drivers default drivers}
     * for an idea of how to implement your own, custom driver.
     * @param spec Driver spec
     */
    defineDriver(spec: LocalForageDriver): Promise<void>;
}