website-scraper/node-website-scraper

import getCssUrls from 'css-url-parser';
import { format } from 'util';

function escapeRegExp (string) {
    return string.replace(/[.*+?^${}()|[\]\\]/g, '\\$&'); // $& means the whole matched string
}  

function changeExactlyMatchedUrl (text, oldUrl, newUrl) {
    // starts with ' " ( ends with ' " )
    const exactlyMatchedPattern = format('([\'"\\(\\s])%s([\'"\\)\\s])', escapeRegExp(oldUrl));
    const exactlyMatchedRegexp = new RegExp(exactlyMatchedPattern, 'g');
    text = text.replace(exactlyMatchedRegexp, function changeUrl (match, g1, g2) {
        return g1 + newUrl + g2;
    });
    return text;
}

class CssText {
    constructor (text) {
        this.text = text || '';
        this.paths = getCssUrls(this.text);
    }

    getPaths () {
        return this.paths;
    }

    updateText (pathsToUpdate) {
        let updatedText = this.text;
        pathsToUpdate.forEach(function updatePath (path) {
            updatedText = changeExactlyMatchedUrl(updatedText, path.oldPath, path.newPath);
        });
        return updatedText;
    }
}


export default CssText;