import { Bucket } from "@google-cloud/storage";
import { BinaryFile, BinaryMap, BinaryParameters, CloudBinary, CoreModel, DeepPartial, OperationContext, WebContext } from "@webda/core";
import { Readable } from "stream";
export type StorageObject = {
    key: string;
    /**
     * bucket is an option,
     * if not provided: it will get the DEFAULT_BUCKET set from environment variable
     */
    bucket?: string;
};
export type DownloadParams = StorageObject & {
    localPath: string;
};
export type PutObjectParams = StorageObject & {
    localPath?: string;
    content?: string | Buffer;
};
export type SignedUrlParams = StorageObject & {
    expires?: number;
    action: "read" | "write" | "delete";
    contentMd5?: string;
    contentType?: string;
    extensionHeaders?: {
        [key: string]: string;
    };
    responseDisposition?: string;
    queryParams?: {
        [key: string]: string;
    };
};
export type StorageObjectMeta = {
    size: number;
    contentType: string;
};
export declare class StorageParameters extends BinaryParameters {
    prefix?: string;
    bucket: string;
    constructor(params: any, service: Storage);
}
/**
 * Storage handles the storage of binary on a Google Cloud Storage bucket
 *
 * See Binary the general interface
 * @WebdaModda GoogleCloudStorage
 */
export default class Storage<T extends StorageParameters = StorageParameters> extends CloudBinary<T> {
    private _storage?;
    private get storage();
    /**
     * Load the parameters
     *
     * @param params
     */
    loadParameters(params: DeepPartial<T>): StorageParameters;
    /**
     * @override
     */
    _get(info: BinaryMap): Promise<Readable>;
    /**
     * @override
     */
    getSignedUrlFromMap(map: BinaryMap, expires: number, _context: OperationContext): Promise<string>;
    /**
     * Get object content in Buffer
     * @param {StorageObject} params
     */
    getContent({ bucket, key }: StorageObject): Promise<Readable>;
    /**
     * Upload a local file to GCS bucket destination
     *
     * @param key to add to
     * @param body content of the object
     * @param metadatas to put along the object
     * @param bucket to use
     */
    putObject(key: string, body: Readable | Buffer | string, metadata?: {}, bucket?: string): Promise<void>;
    /**
     * Return the Google Bucket directly
     *
     * @param bucket name of the bucket default to the one predefined
     * @returns
     */
    getStorageBucket(bucket?: string): Bucket;
    /**
     * @inheritdoc
     */
    _cleanUsage(hash: string, uuid: string, property?: string): Promise<void>;
    /**
     * @inheritdoc
     */
    getUsageCount(hash: string): Promise<number>;
    /**
     * @inheritdoc
     */
    store(object: CoreModel, property: string, file: BinaryFile): Promise<void>;
    /**
     * Delete a file inside an existing bucket
     * @param {DeleteObjectParams} params
     */
    deleteObject({ bucket, key }: StorageObject): Promise<void>;
    /**
     * Move a file from one bucket to an other
     * @param {StorageObject} source
     * @param {StorageObject} destination
     */
    moveObject(source: StorageObject, destination: StorageObject): Promise<void>;
    /**
     * @inheritdoc
     */
    putRedirectUrl(ctx: WebContext): Promise<{
        url: string;
        method: string;
        headers: {
            [key: string]: string;
        };
    }>;
    /**
     * Retrieve one signed URL to download the file in parameter
     * @param {SignedUrlParams} params
     * @returns {string} URL in order to download the file
     */
    getSignedUrl({ bucket, key, expires, action, ...params }: SignedUrlParams): Promise<string>;
    /**
     * Retrieve mandatory headers if needed by the cloud provider (ie. Azure)
     * Returns empty object if no headers are mandatory
     * @returns {[key:string]: string} mandatory headers
     */
    getSignedUrlHeaders(): {
        [key: string]: string;
    };
    /**
     * Retrieve public URL of this object
     * @param {StorageModel} store
     * @returns {string} Public URL in order to download the file
     */
    getPublicUrl({ bucket, key }: StorageObject): Promise<string>;
    /**
     * Fetch an object's metadata
     * @param {StorageModel} store
     * @returns {any} Metadata
     */
    getMeta({ bucket, key }: StorageObject): Promise<StorageObjectMeta>;
    /**
     * Get a bucket size with a prefix
     * @param bucket
     * @param prefix on the bucket
     * @param regex to filter files
     */
    getBucketSize(bucket?: string, prefix?: string, regex?: RegExp): Promise<{
        size: number;
        count: number;
    }>;
    /**
     * @inheritdoc
     */
    putMarker(hash: string, uuid: string, storeName: string): Promise<void>;
}
export { Storage };