next-sitemap.config.js

const fs = require('fs');
const path = require('path');

// Scan app/ folder recursively, include only folders with page.jsx
function getAllPages(dir = 'app', prefix = '') {
    const routes = [];
    const items = fs.readdirSync(dir);

    for (const item of items) {
        const fullPath = path.join(dir, item);
        const stat = fs.statSync(fullPath);

        if (stat.isDirectory()) {
            if (item === 'api' || item.startsWith('_')) continue; // skip API and special folders

            const pageFile = fs.readdirSync(fullPath).find(f => f === 'page.jsx' || f === 'page.tsx');
            if (pageFile) {
                routes.push(`${prefix}/${item}`);
            }

            // Recurse into subfolders
            routes.push(...getAllPages(fullPath, `${prefix}/${item}`));
        }
    }

    return routes;
}

/** @type {import('next-sitemap').IConfig} */
const config = {
    siteUrl: 'https://dsavisualizer.in',
    generateRobotsTxt: true,
    sitemapSize: 5000,
    transform: async (config, path) => ({
        loc: path,
        lastmod: new Date().toISOString(),
    }),
    additionalPaths: async (config) => {
        const allRoutes = getAllPages(); // recursively get all module pages
        return allRoutes.map(route => ({
            loc: route,
            lastmod: new Date().toISOString(),
        }));
    },
};

module.exports = config;