import { HandlerContext } from "@atomist/automation-client/lib/HandlerContext";
/**
 * Creates a PreferenceStore instance provided the HandlerContext of the current execution
 */
export declare type PreferenceStoreFactory = (ctx: HandlerContext) => PreferenceStore;
/**
 * Scope of a preference
 */
export declare enum PreferenceScope {
    Sdm = "sdm",
    Workspace = "workspace"
}
/**
 * Strategy to store and retrieve SDM preferences.
 */
export interface PreferenceStore {
    /**
     * Retrieve a preference object via its key in the given scope.
     */
    get<V>(key: string, options?: {
        scope?: PreferenceScope | string;
        defaultValue?: V;
    }): Promise<V | undefined>;
    /**
     * Store a preference object with the specified ttl and scope.
     */
    put<V>(key: string, value: V, options?: {
        scope?: PreferenceScope | string;
        ttl?: number;
    }): Promise<V>;
    /**
     * List all preferences in a given scope
     */
    list<V>(scope: PreferenceScope | string): Promise<Array<{
        key: string;
        value: V;
    }>>;
    /**
     * Delete a preference in a given scope
     */
    delete(key: string, options?: {
        scope?: PreferenceScope | string;
    }): Promise<void>;
}
/**
 * NoOp PreferenceStore implementation useful for situations in which
 * the SDM does not support preferences or tests.
 */
export declare const NoPreferenceStore: PreferenceStore;
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