Add app version management, update checks, and periodic SW updates

- Introduced version.json and appVersionAssetPlugin for build-time version tracking.
- Enhanced settings page with update check/status UI.
- Refactored bootstrap to handle SW updates and initiate periodic checks.

README.md

@@ -93,6 +93,7 @@ For installability and service worker support:
 
 - serve `manifest.webmanifest` with an appropriate web manifest content type
 - make sure `service-worker.js` is reachable from the deployed site root
+- make sure `version.json` is reachable from the deployed site root for app update checks
 - avoid aggressive caching on `index.html` during upgrades so new builds are picked up reliably
 
 ### Smoke test after deployment
@@ -113,6 +114,7 @@ public/
   manifest.webmanifest
   offline.html
   service-worker.js
+  version.json
 src/
   api/
   app/

package-lock.json

@@ -1,12 +1,12 @@
 {
   "name": "lonc-web",
-  "version": "0.1.3",
+  "version": "0.1.4",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "lonc-web",
-      "version": "0.1.3",
+      "version": "0.1.4",
       "dependencies": {
         "@zxing/browser": "^0.1.5",
         "alpinejs": "^3.14.9",

package.json

@@ -1,6 +1,6 @@
 {
   "name": "lonc-web",
-  "version": "0.1.3",
+  "version": "0.1.4",
   "private": true,
   "type": "module",
   "scripts": {

public/service-worker.js

@@ -3,7 +3,6 @@ const APP_SHELL = ['/', '/index.html', '/manifest.webmanifest', '/offline.html',
 
 self.addEventListener('install', (event) => {
   event.waitUntil(caches.open(CACHE_NAME).then((cache) => cache.addAll(APP_SHELL)));
-  self.skipWaiting();
 });
 
 self.addEventListener('activate', (event) => {
@@ -19,6 +18,12 @@ self.addEventListener('activate', (event) => {
   self.clients.claim();
 });
 
+self.addEventListener('message', (event) => {
+  if (event?.data?.type === 'SKIP_WAITING') {
+    self.skipWaiting();
+  }
+});
+
 self.addEventListener('fetch', (event) => {
   if (event.request.method !== 'GET') {
     return;
@@ -40,6 +45,11 @@ self.addEventListener('fetch', (event) => {
     return;
   }
 
+  if (requestUrl.pathname === '/version.json') {
+    event.respondWith(fetch(event.request, { cache: 'no-store' }));
+    return;
+  }
+
   const destination = event.request.destination;
   if (
     destination === 'script' ||

src/app/bootstrap.js

@@ -9,24 +9,201 @@ import { appShell } from '../components/app-shell.js';
 import { navBar } from '../components/nav-bar.js';
 import { registerFeatureData } from '../features/register.js';
 
+const APP_UPDATE_CHECK_INTERVAL_MS = 5 * 60 * 1000;
+
+function createAppUpdateManager() {
+  let registration = null;
+  let waitingWorker = null;
+
+  async function fetchServerVersion() {
+    try {
+      const response = await fetch(`/version.json?ts=${Date.now()}`, {
+        cache: 'no-store',
+        headers: {
+          'cache-control': 'no-cache',
+          pragma: 'no-cache',
+        },
+      });
+
+      if (!response.ok) {
+        throw new Error(`Version endpoint failed with HTTP ${response.status}`);
+      }
+
+      const payload = await response.json();
+      const serverVersion = String(payload?.version || '').trim();
+      const serverBuildTime = String(payload?.buildTime || '').trim();
+
+      return {
+        serverVersion: serverVersion || null,
+        serverBuildTime: serverBuildTime || null,
+      };
+    } catch (error) {
+      return {
+        serverVersion: null,
+        serverBuildTime: null,
+        error: error instanceof Error ? error.message : 'Unable to reach version endpoint.',
+      };
+    }
+  }
+
+  function syncWaitingWorker() {
+    waitingWorker = registration?.waiting || null;
+  }
+
+  function setupRegistrationHooks() {
+    if (!registration) {
+      return;
+    }
+
+    syncWaitingWorker();
+
+    registration.addEventListener('updatefound', () => {
+      const installing = registration.installing;
+      if (!installing) {
+        return;
+      }
+
+      installing.addEventListener('statechange', () => {
+        if (installing.state === 'installed' && navigator.serviceWorker.controller) {
+          waitingWorker = registration.waiting || installing;
+        }
+      });
+    });
+  }
+
   async function installServiceWorker() {
     if (!('serviceWorker' in navigator)) {
-    return;
+      return { supported: false };
     }
 
     if (import.meta.env.DEV) {
       const registrations = await navigator.serviceWorker.getRegistrations();
-    await Promise.all(registrations.map((registration) => registration.unregister()));
+      await Promise.all(registrations.map((existingRegistration) => existingRegistration.unregister()));
+      return { supported: false, development: true };
+    }
+
+    registration = await navigator.serviceWorker.register('/service-worker.js');
+    setupRegistrationHooks();
+
+    return {
+      supported: true,
+      registered: true,
+    };
+  }
+
+  async function checkForAppUpdate() {
+    if (registration) {
+      await registration.update().catch(() => {});
+      syncWaitingWorker();
+    }
+
+    const server = await fetchServerVersion();
+    const hasVersionMismatch = Boolean(server.serverVersion && server.serverVersion !== APP_VERSION);
+
+    return {
+      supported: 'serviceWorker' in navigator,
+      currentVersion: APP_VERSION,
+      serverVersion: server.serverVersion,
+      serverBuildTime: server.serverBuildTime,
+      waitingWorker: Boolean(waitingWorker),
+      updateAvailable: Boolean(waitingWorker) || hasVersionMismatch,
+      hasVersionMismatch,
+      serverError: server.error || null,
+    };
+  }
+
+  async function waitForControllerChange(previousController, timeoutMs = 4000) {
+    if (!('serviceWorker' in navigator)) {
       return;
     }
 
-  await navigator.serviceWorker.register('/service-worker.js');
+    if (navigator.serviceWorker.controller && navigator.serviceWorker.controller !== previousController) {
+      return;
+    }
+
+    await new Promise((resolve) => {
+      let isDone = false;
+
+      const finish = () => {
+        if (isDone) {
+          return;
+        }
+
+        isDone = true;
+        navigator.serviceWorker.removeEventListener('controllerchange', onControllerChange);
+        clearTimeout(timeout);
+        resolve();
+      };
+
+      const onControllerChange = () => {
+        finish();
+      };
+
+      const timeout = setTimeout(finish, timeoutMs);
+
+      navigator.serviceWorker.addEventListener('controllerchange', onControllerChange);
+    });
+  }
+
+  async function clearAllServiceWorkerCaches() {
+    if (!('caches' in window)) {
+      return;
+    }
+
+    const keys = await caches.keys();
+    await Promise.all(keys.map((key) => caches.delete(key)));
+  }
+
+  async function applyAppUpdate() {
+    const previousController = navigator.serviceWorker?.controller || null;
+
+    if (registration) {
+      await registration.update().catch(() => {});
+      syncWaitingWorker();
+    }
+
+    if (waitingWorker) {
+      waitingWorker.postMessage({ type: 'SKIP_WAITING' });
+      await waitForControllerChange(previousController);
+    }
+
+    await clearAllServiceWorkerCaches().catch(() => {});
+
+    const nextUrl = new URL(window.location.href);
+    nextUrl.searchParams.set('app_update', String(Date.now()));
+    window.location.replace(nextUrl.toString());
+  }
+
+  function startPeriodicChecks() {
+    if (!registration) {
+      return;
+    }
+
+    window.setInterval(() => {
+      checkForAppUpdate().catch(() => {});
+    }, APP_UPDATE_CHECK_INTERVAL_MS);
+
+    document.addEventListener('visibilitychange', () => {
+      if (document.visibilityState === 'visible') {
+        checkForAppUpdate().catch(() => {});
+      }
+    });
+  }
+
+  return {
+    installServiceWorker,
+    checkForAppUpdate,
+    applyAppUpdate,
+    startPeriodicChecks,
+  };
 }
 
 export function bootstrapApp() {
   const store = createAppStore();
   Alpine.store('app', store);
 
+  const appUpdateManager = createAppUpdateManager();
+
   registerFeatureData(Alpine, store);
 
   const appRoot = document.querySelector('#app');
@@ -104,6 +281,12 @@ export function bootstrapApp() {
       renderNav();
       return result;
     },
+    async checkForAppUpdate() {
+      return appUpdateManager.checkForAppUpdate();
+    },
+    async applyAppUpdate() {
+      return appUpdateManager.applyAppUpdate();
+    },
     handleAuthFailure(error) {
       if (!store.session?.applicationKey || !store.session?.hasValidated || authFailureHandled) {
         return;
@@ -152,7 +335,10 @@ export function bootstrapApp() {
 
   renderNav();
 
-  installServiceWorker().catch(() => {
+  appUpdateManager
+    .installServiceWorker()
+    .then(() => appUpdateManager.startPeriodicChecks())
+    .catch(() => {
       store.addAlert({
         type: 'warning',
         message: 'PWA installation support could not be initialized.',

src/features/auth/settings-page.js

@@ -1,10 +1,12 @@
+import { APP_VERSION } from '../../app/config.js';
+
 export function renderSettingsPage() {
   return `
     <section class="container-xxl py-4 py-lg-5">
       <div class="row g-4">
         <div class="col-12 col-lg-7">
           <div class="card border-0 shadow-sm">
-            <div class="card-body p-4" x-data="settingsPage()">
+            <div class="card-body p-4" x-data="settingsPage()" x-init="initUpdatePanel()">
               <div class="d-flex justify-content-between align-items-start mb-4">
                 <div>
                   <p class="eyebrow mb-2">Client Settings</p>
@@ -40,6 +42,45 @@ export function renderSettingsPage() {
                 </div>
                 <button class="btn btn-primary align-self-start" type="submit">Save settings</button>
               </form>
+
+              <hr class="my-4" />
+
+              <div class="vstack gap-3">
+                <div>
+                  <h2 class="h5 mb-1">App update</h2>
+                  <p class="text-body-secondary mb-0">
+                    Check for the latest deployed build and force-refresh this installed app when needed.
+                  </p>
+                </div>
+                <div class="row g-3 small">
+                  <div class="col-12 col-md-6">
+                    <div class="border rounded-3 p-3 h-100 bg-body-tertiary">
+                      <div class="text-uppercase text-body-secondary fw-semibold mb-1">Current version</div>
+                      <div class="fw-semibold" x-text="update.currentVersion"></div>
+                    </div>
+                  </div>
+                  <div class="col-12 col-md-6">
+                    <div class="border rounded-3 p-3 h-100 bg-body-tertiary">
+                      <div class="text-uppercase text-body-secondary fw-semibold mb-1">Server version</div>
+                      <div class="fw-semibold" x-text="update.serverVersion || 'Unavailable'"></div>
+                      <template x-if="update.serverBuildTime">
+                        <div class="text-body-secondary mt-1" x-text="'Built: ' + formatBuildTime(update.serverBuildTime)"></div>
+                      </template>
+                    </div>
+                  </div>
+                </div>
+                <div class="d-flex flex-wrap align-items-center gap-2">
+                  <button class="btn btn-outline-secondary" type="button" @click="checkForUpdates()" :disabled="update.isChecking || update.isApplying">
+                    <span x-show="!update.isChecking">Check for updates</span>
+                    <span x-show="update.isChecking">Checking...</span>
+                  </button>
+                  <button class="btn btn-primary" type="button" @click="applyUpdate()" :disabled="update.isApplying">
+                    <span x-show="!update.isApplying">Update app</span>
+                    <span x-show="update.isApplying">Updating...</span>
+                  </button>
+                </div>
+                <div class="small" :class="updateStatusClass()" x-text="update.statusText"></div>
+              </div>
             </div>
           </div>
         </div>
@@ -68,6 +109,15 @@ export function settingsPageData(store) {
       baseUrl: store.config.baseUrl || '',
       database: store.config.database || '',
     },
+    update: {
+      currentVersion: APP_VERSION,
+      serverVersion: null,
+      serverBuildTime: null,
+      statusText: 'Ready to check for updates.',
+      statusType: 'secondary',
+      isChecking: false,
+      isApplying: false,
+    },
     get userLogin() {
       return store.session?.userLogin || '';
     },
@@ -83,5 +133,83 @@ export function settingsPageData(store) {
 
       store.addAlert({ type: 'success', message: 'Settings saved locally.' });
     },
+    formatBuildTime(value) {
+      const date = new Date(value);
+      if (Number.isNaN(date.getTime())) {
+        return value;
+      }
+
+      return date.toLocaleString();
+    },
+    updateStatusClass() {
+      switch (this.update.statusType) {
+        case 'success':
+          return 'text-success';
+        case 'warning':
+          return 'text-warning';
+        case 'danger':
+          return 'text-danger';
+        default:
+          return 'text-body-secondary';
+      }
+    },
+    async initUpdatePanel() {
+      await this.checkForUpdates();
+    },
+    async checkForUpdates() {
+      if (!window.__loncApp?.checkForAppUpdate) {
+        this.update.statusText = 'Service worker updates are not available in this browser.';
+        this.update.statusType = 'warning';
+        return;
+      }
+
+      this.update.isChecking = true;
+      this.update.statusText = 'Checking for updates...';
+      this.update.statusType = 'secondary';
+
+      try {
+        const result = await window.__loncApp.checkForAppUpdate();
+        this.update.currentVersion = result.currentVersion || APP_VERSION;
+        this.update.serverVersion = result.serverVersion || null;
+        this.update.serverBuildTime = result.serverBuildTime || null;
+
+        if (result.updateAvailable) {
+          this.update.statusText = 'Update available. Use "Update app" to refresh this installed build.';
+          this.update.statusType = 'warning';
+        } else if (result.serverError) {
+          this.update.statusText = `No update signal from server (${result.serverError}).`;
+          this.update.statusType = 'secondary';
+        } else {
+          this.update.statusText = 'This app is up to date.';
+          this.update.statusType = 'success';
+        }
+      } catch (error) {
+        const message = error instanceof Error ? error.message : 'Unknown update check error.';
+        this.update.statusText = `Update check failed: ${message}`;
+        this.update.statusType = 'danger';
+      } finally {
+        this.update.isChecking = false;
+      }
+    },
+    async applyUpdate() {
+      if (!window.__loncApp?.applyAppUpdate) {
+        this.update.statusText = 'Update action is not available in this browser.';
+        this.update.statusType = 'warning';
+        return;
+      }
+
+      this.update.isApplying = true;
+      this.update.statusText = 'Applying update and refreshing app...';
+      this.update.statusType = 'warning';
+
+      try {
+        await window.__loncApp.applyAppUpdate();
+      } catch (error) {
+        const message = error instanceof Error ? error.message : 'Unknown update error.';
+        this.update.statusText = `Update failed: ${message}`;
+        this.update.statusType = 'danger';
+        this.update.isApplying = false;
+      }
+    },
   };
 }

vite.config.js

@@ -1,10 +1,32 @@
 import { defineConfig } from 'vite';
 import packageJson from './package.json';
 
+function appVersionAssetPlugin() {
+  return {
+    name: 'app-version-asset',
+    apply: 'build',
+    generateBundle() {
+      this.emitFile({
+        type: 'asset',
+        fileName: 'version.json',
+        source: JSON.stringify(
+          {
+            version: packageJson.version,
+            buildTime: new Date().toISOString(),
+          },
+          null,
+          2,
+        ),
+      });
+    },
+  };
+}
+
 export default defineConfig({
   define: {
     __APP_VERSION__: JSON.stringify(packageJson.version),
   },
+  plugins: [appVersionAssetPlugin()],
   server: {
     port: 4173,
   },