initial prototype based on nat-as-server

website/js/router.js

@@ -0,0 +1,56 @@
+const routes = [];
+let currentCleanup = null;
+
+export function addRoute(pattern, handler) {
+    let regex;
+    const paramNames = [];
+    if (pattern instanceof RegExp) {
+        regex = pattern;
+    } else {
+        const parts = pattern.replace(/\/:([^/]+)/g, (_, name) => {
+            paramNames.push(name);
+            return '/([^/]+)';
+        });
+        regex = new RegExp('^' + parts + '$');
+    }
+    routes.push({ regex, paramNames, handler });
+}
+
+export function navigate(hash) {
+    window.location.hash = hash;
+}
+
+export function currentHash() {
+    return window.location.hash.slice(1) || '/';
+}
+
+async function resolve() {
+    if (typeof currentCleanup === 'function') {
+        currentCleanup();
+        currentCleanup = null;
+    }
+
+    const path = currentHash();
+    for (const route of routes) {
+        const match = path.match(route.regex);
+        if (match) {
+            const params = {};
+            route.paramNames.forEach((name, i) => {
+                params[name] = decodeURIComponent(match[i + 1]);
+            });
+            try {
+                currentCleanup = await route.handler(params) || null;
+            } catch (e) {
+                console.error('Route handler error:', e);
+            }
+            return;
+        }
+    }
+    // fallback: home dashboard
+    navigate('#/');
+}
+
+export function startRouter() {
+    window.addEventListener('hashchange', resolve);
+    resolve();
+}