/*!
 * @license
 * Copyright Squiz Australia Pty Ltd. All Rights Reserved.
 */
import { HeadObjectCommandOutput, PutObjectCommandInput, S3Client } from '@aws-sdk/client-s3';
import 'reflect-metadata';
/**
 * Repository class for interacting with S3.
 * @export
 * @class S3RepositoryBase
 */
export declare class S3RepositoryBase {
    protected s3Client: S3Client;
    protected bucketName: string;
    constructor(s3Client: S3Client, bucketName: string);
    /**
     * Validates S3 key to prevent malicious input
     * @param {string} key The S3 object key to validate
     * @private
     */
    private validateS3Key;
    /**
     * Save object into S3.
     * @param {string} key The S3 object key.
     * @param {PutObjectCommandInputType['Body']} body The body of the S3 object.
     * @return {Promise<void>}
     * @memberof S3RepositoryBase
     */
    put(key: string, body: PutObjectCommandInput['Body']): Promise<void>;
    /**
     * Delete object from S3.
     *
     * @param {string} key The S3 object key.
     * @memberof S3RepositoryBase
     */
    delete(key: string): Promise<void>;
    /**
     * Retrieve object from S3.
     * @param {string} key The S3 object key.
     * @return {Promise<string | null>} The S3 object.
     * @memberof S3RepositoryBase
     */
    get(key: string): Promise<string | null>;
    /**
     * Check if the S3 object key exists.
     * @param {string} key The S3 object key.
     * @return {Promise<HeadObjectCommandOutput>}
     * @memberof S3RepositoryBase
     */
    check(key: string): Promise<HeadObjectCommandOutput>;
    getS3SignedUrl(key: string): Promise<string>;
}