/**
 * Public path to store downloaded images.
 */
export declare const AN_IMAGES_DIR = "public/images/astronotion";
export declare type Image = {
    id: string;
    url: string;
};
/**
 * Given a full URL, get the image path. Optionally prepend with
 * string from preceding path to ensure unique file name.
 *
 * @param {string} url
 * @param {boolean=} prepend
 * @returns {string} eg. "cat-in-helmet.jpg"
 */
export declare const getFilename: (url: string, prepend?: boolean) => string;
/**
 * Returns true if URL contains an expires header, which means it
 * needs to be downloaded to user's directory.
 *
 * @param {string} url
 * @returns {boolean}
 */
export declare const checkShouldDownloadImage: (url: string) => boolean;
/**
 * Returns true if URL should be replaced with a downloadable one,
 * ie. with an expires header.
 *
 * @param {string} url
 * @returns {boolean}
 */
export declare const checkShouldReplaceDownloadable: (url: string) => boolean;
/**
 * Run customization on Notion image URLs, eg. add missing base path,
 * add size params, etc.
 *
 * @param {string} url
 * @returns {string}
 */
export declare const customizeImageUrl: (url: string) => string;
/**
 * Compare a given image URL with list of downloadable URLs.
 * Return a matching downloadable URL (ie. if it's a custom uploaded image)
 * or else return the original URL (ie. from Notion gallery, Unsplash, etc).
 *
 * @param {string} oriUrl
 * @param {string[]} downloadableUrls
 * @returns string
 */
export declare const replaceImageUrlWithDownloadable: (oriUrl: string, downloadableUrls: string[]) => string;
/**
 * Wrapper function for other image helper functions in this module.
 *
 * @param {string} oriUrl
 * @param {string[]=} downloadableUrls
 * @returns string
 */
export declare const transformImageUrl: (oriUrl: string, downloadableUrls?: string[]) => string;