/// <reference types="node" />
import { CoreServices } from '../core-services';
import 'dotenv/config';
declare const instance: () => any;
export interface TagSet {
    [key: string]: string;
}
/**
 * type: `HeadObjectResult`
 * - some properties of `HeadObjectOutput`
 */
export interface HeadObjectResult {
    ContentType: string;
    ContentLength: number;
    Metadata: ReturnType<typeof instance>['Metadata'];
    ETag: string;
    LastModified: string;
}
/**
 * type: `PutObjectResult`
 * - only some properties from origin-result.
 */
export interface PutObjectResult {
    Location: string;
    Bucket: string;
    Key: string;
    /**
     * An ETag is an opaque identifier assigned by a web server to a specific version of a resource found at a URL.
     */
    ETag: string;
    /**
     * Size of the body in bytes.
     */
    ContentLength?: number;
    /**
     * A standard MIME type describing the format of the object data.
     */
    ContentType?: string;
    /**
     * A map of metadata to store with the object in S3.
     */
    Metadata?: ReturnType<typeof instance>['Metadata'];
}
/**
 * type: `GetObjectResult`
 * - only some properties from origin-result.
 */
export interface GetObjectResult {
    /**
     * Size of the body in bytes.
     */
    ContentLength?: number;
    /**
     * A standard MIME type describing the format of the object data.
     */
    ContentType?: string;
    /**
     * A map of metadata to store with the object in S3.
     */
    Metadata: ReturnType<typeof instance>['Metadata'];
    /**
     * Object data.
     */
    Body?: Body;
    /**
     * An ETag is an opaque identifier assigned by a web server to a specific version of a resource found at a URL.
     */
    ETag: string;
    /**
     * The number of tags, if any, on the object.
     */
    TagCount?: number;
}
/**
 * type: `ListObjectResult`
 * - only some properties from origin-result.
 */
export interface ListObjectResult {
    /** list of object infor */
    Contents: ReturnType<typeof instance>['BlobItem'];
    /** limit of each request */
    MaxKeys: number;
    /** total key-count read */
    KeyCount: number;
    /** flag to have more */
    IsTruncated?: boolean;
    /** valid only if truncated, and has more */
    NextContinuationToken?: string;
    /** internal error-string */
    error?: string;
}
export interface CoreBlobService extends CoreServices {
    bucket: (target?: string) => string;
    putObject: (body: string, key?: string, metadata?: ReturnType<typeof instance>['Metadata'], tags?: TagSet) => Promise<PutObjectResult>;
    getObject: (key: string) => Promise<any>;
    getDecodedObject: (key: string) => Promise<any>;
    getObjectTagging: (key: string) => Promise<TagSet>;
    deleteObject: (key: string) => Promise<void>;
}
/**
 * main service implement.
 */
export declare class BlobService implements CoreBlobService {
    /**
     * environ name to use `bucket`
     */
    static ENV_BLOB_NAME: string;
    /**
     * default `bucket` name
     */
    static DEF_BLOB_BUCKET: string;
    /**
     * get name of this
     */
    name: () => string;
    /**
     * hello
     */
    hello: () => string;
    /**
     * get target endpoint by name.
     */
    bucket: (target?: string) => string;
    /**
     * get azure sdk for blob
     */
    instance: () => Promise<{
        storageClient: any;
        blobServiceClient: any;
        resourceGroupName: string;
        Metadata: any;
        BlobItem: any;
    }>;
    /**
     * retrieve metadata without returning the object
     *
     * @param {string} key
     * @return  metadata object / null if not exists
     */
    headObject: (key: string) => Promise<HeadObjectResult>;
    /**
     * get a file from Blob Container
     *
     * @param {string} key
     */
    getObject: (key: string) => Promise<any>;
    /**
     * return decoded Object from Blob Container file.
     *
     * @param {string} key  ex) 'hello-0001.json' , 'dist/hello-0001.json
     */
    getDecodedObject: <T = object>(key: string) => Promise<T>;
    /**
     * get tag-set of object
     *
     * @param {string} key
     */
    getObjectTagging: (key: string) => Promise<any>;
    /**
     * delete object from Blob Container
     *
     * @param {string} key
     */
    deleteObject: (key: string) => Promise<void>;
    /**
     * list objects in Blob Container
     */
    listObjects: (options?: {
        /** keys that begin with the specified prefix. */
        prefix?: string;
        /** use to group keys */
        delimiter?: string;
        /** maximum number of keys returned in single request (default 10, max 1000) */
        limit?: number;
        /** flag to read all keys (each request contains `limit`) */
        unlimited?: boolean;
        /** same as NextContinuationToken */
        nextToken?: string;
        /** (optional) flag to throw error if error, or see `.error` in result */
        throwable?: boolean;
    }) => Promise<any>;
    /**
     * upload a file to Blob Container
     *
     *
     * @param {string|Buffer} content   content body
     * @param {string} key              (optional) S3 key to put
     * @param {Metadata} metadata       (optional) metadata to store
     * @param {object} tags             (optional) tag set
     */
    putObject: (content: string | Buffer, key?: string, metadata?: ReturnType<typeof instance>['Metadata'], tags?: TagSet) => Promise<any>;
}
export {};