/**
 * This file is part of the @egodigital/egoose distribution.
 * Copyright (c) e.GO Digital GmbH, Aachen, Germany (https://www.e-go-digital.com/)
 *
 * @egodigital/egoose is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation, version 3.
 *
 * @egodigital/egoose is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */
/// <reference types="node" />
import * as azureStorage from 'azure-storage';
import { Readable } from 'stream';
/**
 * Options for an 'AzureStorageClient'.
 */
export interface AzureStorageClientOptions {
    /**
     * A custom function or string that provides the name of the underlying container.
     * If not defined, 'AZURE_STORAGE_CONTAINER' environment variable is used.
     *
     * @return {string|Function} The result with the container name or the container name as string.
     */
    blobContainerProvider?: string | (() => string | Promise<string>);
    /**
     * A custom function, which detects a MIME type by a blob name / path,
     *
     * @param {string} path The blob path / name.
     *
     * @return {string|Promise<string>} The result with the detected MIME type.
     */
    blobContentTypeDetector?: (path: string) => string | Promise<string>;
    /**
     * A custom function that provides the 'BlobService' instance to use.
     * If not defined, default settings from environment are used.
     *
     * @return {azureStorage.BlobService|Promise<azureStorage.BlobService>} The result with the service instance.
     */
    blobServiceProvider?: () => azureStorage.BlobService | Promise<azureStorage.BlobService>;
    /**
     * A custom function that resolves a full blob path.
     *
     * @param {string} path The input path.
     *
     * @return {string|Promise<string>} The result with the full path.
     */
    toFullBlobPath?: (path: string) => string | Promise<string>;
    /**
     * A custom function that creates a unique blob name.
     *
     * @param {string} path The input path / name of the blob.
     *
     * @return {string|Promise<string>} The result with a unique blob name / path.
     */
    uniqueBlobNameCreator?: (path: string) => string | Promise<string>;
}
/**
 * An async Azure Storage client.
 */
export declare class AzureStorageClient {
    readonly options?: AzureStorageClientOptions;
    /**
     * Initializes a new instance of that class.
     *
     * @param {AzureStorageClientOptions} [options] The custom options.
     */
    constructor(options?: AzureStorageClientOptions);
    /**
     * Creates a new blob service instance, based on the underlying options.
     *
     * @return {Promise<azureStorage.BlobService>} The promise with the new instance.
     */
    createBlobService(): Promise<azureStorage.BlobService>;
    /**
     * Creates a read stream for a blob.
     *
     * @param {string} path The path of the blob.
     *
     * @return {Promise<Readable>} The promise with the stream.
     */
    createBlobReadStream(path: string): Promise<Readable>;
    /**
     * Creates a new instance from environment settings.
     *
     * @return {AzureStorageClient} The new instance.
     */
    static fromEnvironment(): AzureStorageClient;
    /**
     * Tries to return information about a blob.
     *
     * @param {string} path The path / name of the blob to check.
     *
     * @return {Promise<false|azureStorage.BlobService.BlobResult>} The promise that contains the blob information or (false) if it does not exist.
     */
    getBlobInfo(path: string): Promise<false | azureStorage.BlobService.BlobResult>;
    private getContainer;
    /**
     * Lists a folder in a blob storage container.
     *
     * @param {string} path The path of the folder.
     *
     * @return {Promise<azureStorage.BlobService.BlobResult[]>} The promise with the result.
     */
    listBlobs(path: string): Promise<azureStorage.BlobService.BlobResult[]>;
    /**
     * Loads a blob.
     *
     * @param {string} path The path / blob name.
     *
     * @return {Promise<Buffer>} The promises with the loaded data.
     */
    loadBlob(path: string): Promise<Buffer>;
    /**
     * Saves / uploads a blob.
     *
     * @param {string} path The path / name of the blob.
     * @param {any} data The data to upload / store.
     */
    saveBlob(path: string, data: any): Promise<void>;
    /**
     * Saves a blob with a unique name / path.
     *
     * @param {string} path The original path / name of the blob.
     * @param {any} data The data to store / save.
     *
     * @return {Promise<string>} The promise with the path / name of the stored blob.
     */
    saveUniqueBlob(path: string, data: any): Promise<string>;
    private toFullPath;
}
/**
 * Normalizes an Azure blob path.
 *
 * @param {string} p The input path.
 *
 * @return {string} The normalized path.
 */
export declare function normalizeAzureBlobPath(p: string): string;