mwoffliner/lib/util/url.helper.js

MediaWiki ZIM scraper

import * as urlParser from 'url';
class URLHelper {
    urlPartCache = {};
    serializeUrl(url) {
        const { path } = urlParser.parse(url);
        const cacheablePart = url.replace(path, '');
        const cacheEntry = Object.entries(this.urlPartCache).find(([, value]) => value === cacheablePart);
        let cacheKey;
        if (!cacheEntry) {
            const cacheId = String(Object.keys(this.urlPartCache).length + 1);
            this.urlPartCache[cacheId] = cacheablePart;
            cacheKey = `_${cacheId}_`;
        }
        else {
            cacheKey = `_${cacheEntry[0]}_`;
        }
        return `${cacheKey}${path}`;
    }
    deserializeUrl(url) {
        if (!url.startsWith('_'))
            return url;
        const [, cacheId, ...pathParts] = url.split('_');
        const path = pathParts.join('_');
        const cachedPart = this.urlPartCache[cacheId];
        return `${cachedPart}${path}`;
    }
}
const urlHelper = new URLHelper();
export default urlHelper;
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