Add sitemap, generated at build time

next-sitemap.config.js

@@ -0,0 +1,34 @@
+/** @type {import('next-sitemap').IConfig} */
+const fetch = (...args) => import('node-fetch').then(({default: fetch}) => fetch(...args));
+
+const MOD_SEARCH_INDEX_URL = 'https://mods.modmapper.com/mod_search_index.json';
+
+module.exports = {
+  siteUrl: process.env.SITE_URL || 'https://modmapper.com',
+  generateRobotsTxt: true,
+  additionalPaths: async (config) => {
+    console.log("additional paths");
+    const result = []
+
+    const response = await fetch(MOD_SEARCH_INDEX_URL);
+    const index = await response.json();
+
+    for (const mod of index) {
+      result.push({
+        loc: '/?mod=' + mod.id,
+        changefreq: 'daily',
+      });
+    }
+
+    for (let x = -77; x < 75; x++) {
+      for (let y = -50; y < 44; y++) {
+        result.push({
+          loc: '/?cell=' + encodeURIComponent(`${x},${y}`),
+          changefreq: 'daily',
+        });
+      }
+    }
+
+    return result
+  },
+}

package.json

@@ -4,6 +4,7 @@
   "scripts": {
     "dev": "next dev",
     "build": "next build",
+    "postbuild": "next-sitemap --config next-sitemap.config.js",
     "start": "next start",
     "lint": "next lint"
   },
@@ -26,6 +27,8 @@
     "@types/react-dom": "^17.0.11",
     "eslint": "8.6.0",
     "eslint-config-next": "12.0.8",
+    "next-sitemap": "^2.1.14",
+    "node-fetch": "^3.2.0",
     "typescript": "4.5.4"
   }
 }