online-judge-scraper/dist/utils/get-problem.js

A library to extract information easily from various online judges.

import { Scraper } from '../scrapers/base.js';
import { CodeforcesScraper } from '../scrapers/codeforces.js';
const scraperMap = {
    'codeforces.com': new CodeforcesScraper(),
};
/**
 * Extracts the domain from a URL.
 *
 * @param url - URL to extract domain from
 * @returns The domain name
 */
function extractDomain(url) {
    try {
        const urlObj = new URL(url);
        return urlObj.hostname;
    }
    catch (error) {
        throw new Error(`Invalid URL: ${url}`);
    }
}
/**
 * Main function to get problem data from any supported online judge.
 * Uses the URL domain to quickly identify the appropriate scraper.
 *
 * @param url - URL of the problem to fetch
 * @returns A Promise that resolves to the Problem object
 * @throws Error if the URL is not supported or scraping fails
 *
 */
export async function getProblem(url) {
    try {
        const domain = extractDomain(url);
        const scraper = scraperMap[domain];
        if (!scraper) {
            throw new Error(`No scraper found for domain ${domain}. This online judge may not be supported yet.`);
        }
        // Double-check that this scraper can handle this specific URL
        // (in case there are multiple types of URLs for the same domain)
        if (!scraper.canHandle(url)) {
            throw new Error(`The ${domain} scraper does not support this specific URL format: ${url}`);
        }
        // Use the appropriate scraper to get the problem
        return await scraper.getProblem(url);
    }
    catch (error) {
        if (error instanceof Error) {
            throw new Error(`Failed to get problem: ${error.message}`);
        }
        throw new Error('Failed to get problem: Unknown error');
    }
}