RocketChat/Rocket.Chat

import { isValidLink } from '../../../../views/room/MessageList/lib/isValidLink';

export const buildImageURL = (url: string, imageUrl: string): string => {
    if (isValidLink(imageUrl)) {
        return JSON.stringify(imageUrl);
    }

    const { origin } = new URL(url);
    const imgURL = `${origin}/${imageUrl}`;
    const normalizedUrl = imgURL.replace(/([^:]\/)\/+/gm, '$1');

    return JSON.stringify(normalizedUrl);
};