/**
* @license Copyright (c) 2003-2026, CKSource Holding sp. z o.o. All rights reserved.
* For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-licensing-options
*/
/**
* @module ckbox/utils
*/
import type { InitializedToken } from "@ckeditor/ckeditor5-cloud-services";
import type { CKBoxImageUrls } from "./ckboxconfig.js";
/**
* Converts image source set provided by the CKBox into an object containing:
* - responsive URLs for the "webp" image format,
* - one fallback URL for browsers that do not support the "webp" format.
*
* @internal
*/
export declare function getImageUrls(imageUrls: CKBoxImageUrls): {
	imageFallbackUrl: string;
	imageSources: Array<{
		srcset: string;
		sizes: string;
		type: string;
	}>;
};
/**
* Returns a workspace id to use for communication with the CKBox service.
*
* @param defaultWorkspaceId The default workspace to use taken from editor config.
* @internal
*/
export declare function getWorkspaceId(token: InitializedToken, defaultWorkspaceId?: string): string | null;
/**
* Generates an image data URL from its `blurhash` representation.
*
* @internal
*/
export declare function blurHashToDataUrl(hash?: string): string | undefined;
/**
* Sends the HTTP request.
*
* @internal
* @param options Configuration options
* @param options.url The URL where the request will be sent.
* @param options.signal The AbortSignal to abort the request when needed.
* @param options.authorization The authorization token for the request.
* @param options.method The HTTP method (default: 'GET').
* @param options.data Additional data to send.
* @param options.onUploadProgress A callback informing about the upload progress.
*/
export declare function sendHttpRequest({ url, method, data, onUploadProgress, signal, authorization }: {
	url: URL;
	signal: AbortSignal;
	authorization: string;
	method?: "GET" | "POST";
	data?: FormData | null;
	onUploadProgress?: (evt: ProgressEvent) => void;
}): Promise<any>;
/**
* Returns an extension a typical file in the specified `mimeType` format would have.
*
* @internal
*/
export declare function convertMimeTypeToExtension(mimeType: string): string;
/**
* Tries to fetch the given `url` and returns 'content-type' of the response.
*
* @internal
*/
export declare function getContentTypeOfUrl(url: string, options: {
	signal: AbortSignal;
}): Promise<string>;
/**
* Returns an extension from the given value.
*
* @internal
*/
export declare function getFileExtension(file: File): string;