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API_BASE = document.documentElement.dataset.apiBase;\n\n// Fetch server status\nasync function fetchStatus() {\n try {\n const response = await fetch(API_BASE + '/status');\n const data = await response.json();\n \n const indicator = document.getElementById('statusIndicator');\n const statusText = document.getElementById('statusText');\n const statusDetail = document.getElementById('statusDetail');\n \n if (data.isOnline) {\n indicator.className = 'status-indicator online';\n indicator.textContent = '✓';\n statusText.textContent = 'Server Online';\n statusDetail.textContent = `Last heartbeat: ${data.minutesSince} minutes ago`;\n } else {\n indicator.className = 'status-indicator offline';\n indicator.textContent = '✗';\n statusText.textContent = 'Server Offline';\n statusDetail.textContent = data.minutesSince \n ? `Last seen: ${data.minutesSince} minutes ago`\n : 'No heartbeats recorded';\n }\n } catch (error) {\n console.error('Failed to fetch status:', error);\n }\n}\n\n// Initialize\nasync function init() {\n // Fetch initial status\n await fetchStatus();\n \n // Refresh status every 30 seconds\n setInterval(fetchStatus, 30000);\n}\n\ninit();\n","createdAt",["D",1771707289606],"branchVersion","branchId","c6c88a12-0ba8-11f1-bece-42dde27851f2","id","c6c7fe26-0ba8-11f1-bece-42dde27851f2","heartbeat",["D",1771295494247],"deletedAt","legacyEnvVars",false,"privacy","public","httpPrivacy","description","imageUrl","cea41dc4-b4c3-4a38-8ee6-ee9b5960fda2","pinnedFileId","pinPreview","pinMigrated","screenshotVersion","likeCount",0,"orgId","dbeafde9-66b9-4cff-8625-2da1195a1c5d","tursoName","c6c7fe260ba811f1bece42dde27851f2","tursoHostname","c6c7fe260ba811f1bece42dde27851f2-val-town.aws-us-east-2.turso.io","tursoMeasuredAt",["D",1789519256886],"pinned","userPerm","r","valPerm","blobPerm","rw","emailPerm","sqlitePerm","projectPerm","telemetryPerm","user",{"_102":101,"_109":105},"org",{"_102":101,"_103":-5,"_104":105,"_19":59,"_106":107,"_108":53},"branch",{"_13":91,"_38":92,"_47":46,"_93":48,"_94":-5,"_95":-5,"_96":-5,"_97":-5,"_98":-5,"_99":49,"_100":101},"isOwned",59,"main","projectId","forkedBranchId","forkedBranchVersion","forkedProjectPrivacy","forkedProjectId","forkedProjectOrgId","projectName","userHandle","halffullheart","handle","displayName","avatar","https://img.clerk.com/eyJ0eXBlIjoicHJveHkiLCJzcmMiOiJodHRwczovL2ltYWdlcy5jbGVyay5kZXYvb2F1dGhfZ2l0aHViL2ltZ18yaGQyZVFDeXM0U3YzNkpjdHpudnBqcHRtOGQifQ","tier","pro","canRestrictVals","profileImageUrl","branchName","","adoptOrgId",{"_47":48,"_38":49,"_42":213,"_51":-5,"_52":53,"_54":55,"_56":55,"_57":-5,"_58":-5,"_19":59,"_60":-5,"_61":53,"_62":-5,"_63":-5,"_64":65,"_66":67,"_68":69,"_70":71,"_72":214,"_74":-5,"_75":76,"_77":76,"_78":79,"_80":79,"_81":79,"_82":76,"_83":76,"_84":215,"_86":216,"_88":217,"_90":53},"tree",[192,193,194,195,196],"files",[192,193,194,195,196],"counts",{"_182":65,"_183":152,"_184":65,"_185":186,"_187":188},"contents",[132,133,134,135,136],"upstreamProject","upstreamBranch","emptyEnvVars","flags",[],"hasHttpFiles","grants","orgs","customDomains",{},{"_47":174,"_38":175,"_36":176,"_140":-5,"_45":46,"_44":177,"_142":53,"_42":178,"_13":179,"_39":26,"_40":180,"_30":53,"_145":-5,"_33":181},{"_47":166,"_38":167,"_36":168,"_140":-5,"_45":46,"_44":169,"_142":53,"_42":170,"_13":152,"_39":171,"_40":172,"_30":53,"_145":-5,"_33":173},{"_47":156,"_38":157,"_36":158,"_140":-5,"_45":46,"_44":159,"_142":53,"_42":160,"_13":161,"_39":162,"_40":163,"_30":53,"_145":164,"_33":165},{"_47":147,"_38":148,"_36":149,"_140":-5,"_45":46,"_44":150,"_142":53,"_42":151,"_13":152,"_39":153,"_40":154,"_30":53,"_145":-5,"_33":155},{"_47":137,"_38":138,"_36":139,"_140":-5,"_45":46,"_44":141,"_142":53,"_42":143,"_13":65,"_39":26,"_40":144,"_30":53,"_145":-5,"_33":146},"3c84e2e0-0bd7-11f1-ab86-42dde27851f2","sw.js","3c84e39e-0bd7-11f1-ab86-42dde27851f2","parentId",18,"latest",["D",1771315448635],"self.addEventListener('push', function(event) {\n console.log('Push notification received:', event);\n \n let data = { title: 'Server Status', body: 'Notification received' };\n \n if (event.data) {\n try {\n data = event.data.json();\n } catch (e) {\n data.body = event.data.text();\n }\n }\n \n const options = {\n body: data.body,\n icon: data.icon || '/icon-192.png',\n badge: data.badge || '/badge-96.png',\n vibrate: [200, 100, 200],\n timestamp: data.timestamp || Date.now(),\n requireInteraction: true,\n actions: [\n { action: 'view', title: 'View Status' },\n { action: 'close', title: 'Close' }\n ]\n };\n \n event.waitUntil(\n self.registration.showNotification(data.title, options)\n );\n});\n\nself.addEventListener('notificationclick', function(event) {\n console.log('Notification clicked:', event.action);\n \n event.notification.close();\n \n if (event.action === 'view' || !event.action) {\n event.waitUntil(\n clients.openWindow('/')\n );\n }\n});\n\nself.addEventListener('install', function(event) {\n console.log('Service Worker installing...');\n self.skipWaiting();\n});\n\nself.addEventListener('activate', function(event) {\n console.log('Service Worker activating...');\n event.waitUntil(clients.claim());\n});\n","label",[138],"e0e4f94c-0f65-11f1-b50b-42dde27851f2","monitor.ts","ea62b2f6-0bab-11f1-9901-42dde27851f2",34,["D",1771706566424],1,"interval","import { sqlite } from \"https://esm.town/v/std/sqlite@14-main/main.ts\";\n\n// This runs every 15 minutes to check if server is down\nexport default async function() {\n console.log(\"Checking server status...\", new Date().toISOString());\n\n try {\n // Get the last heartbeat\n const result = await sqlite.execute(\n \"SELECT timestamp FROM heartbeats ORDER BY timestamp DESC LIMIT 1\"\n );\n \n const lastHeartbeat = result.rows[0]?.timestamp as number || null;\n \n if (!lastHeartbeat) {\n console.log(\"No heartbeats recorded yet\");\n return;\n }\n\n const now = Date.now();\n const timeSinceLastHeartbeat = now - lastHeartbeat;\n const oneHour = 60 * 60 * 1000;\n \n console.log(`Last heartbeat: ${Math.floor(timeSinceLastHeartbeat / 60000)} minutes ago`);\n\n // If more than 1 hour since last heartbeat, send Pushcut notification\n if (timeSinceLastHeartbeat > oneHour) {\n console.log(\"Server is DOWN! Sending Pushcut notification...\");\n fetch(Deno.env.get(\"NOTIFY_SERVER_DOWN_URL\")!, { method: \"POST\" });\n } else {\n console.log(\"Server is online ✓\");\n }\n } catch (error) {\n console.error(\"Monitor error:\", error);\n }\n}\n",[148],"8e3592a4-0f67-11f1-8d50-42dde27851f2","main.ts","c6cc02dc-0ba8-11f1-bece-42dde27851f2",45,["D",1771707286702],26,"http","import { Hono } from \"npm:hono@4\";\nimport { sqlite } from \"https://esm.town/v/std/sqlite@14-main/main.ts\";\n\nconst app = new Hono();\n\n// Initialize database\nawait sqlite.execute(`\n CREATE TABLE IF NOT EXISTS heartbeats (\n id INTEGER PRIMARY KEY AUTOINCREMENT,\n timestamp INTEGER NOT NULL\n )\n`);\n\n// Home page — renders status server-side\napp.get(\"/\", async (c) => {\n const result = await sqlite.execute(\n \"SELECT timestamp FROM heartbeats ORDER BY timestamp DESC LIMIT 1\"\n );\n\n const lastHeartbeat = result.rows[0]?.timestamp as number || null;\n const now = Date.now();\n const isOnline = lastHeartbeat ? (now - lastHeartbeat) < 60 * 60 * 1000 : false;\n const minutesSince = lastHeartbeat ? Math.floor((now - lastHeartbeat) / 60000) : null;\n\n const indicatorClass = lastHeartbeat ? (isOnline ? \"online\" : \"offline\") : \"offline\";\n const indicatorIcon = lastHeartbeat ? (isOnline ? \"✓\" : \"✗\") : \"✗\";\n const statusText = lastHeartbeat ? (isOnline ? \"Server Online\" : \"Server Offline\") : \"No Data\";\n const statusDetail = lastHeartbeat\n ? (isOnline ? `Last heartbeat: ${minutesSince} minutes ago` : `Last seen: ${minutesSince} minutes ago`)\n : \"No heartbeats recorded\";\n\n const html = `\n\n\n \n \n Home Server Monitor\n \n\n\n

🖥️ Home Server Monitor

Real-time server status tracking

${indicatorIcon}

${statusText}

${statusDetail}

\n\n`;\n\n return c.html(html);\n});\n\n// Heartbeat endpoint - your server calls this\napp.post(\"/heartbeat\", async (c) => {\n const secretKey = Deno.env.get(\"SECRET_KEY\");\n const providedKey = c.req.header(\"x-secret-key\");\n\n if (!secretKey || providedKey !== secretKey) {\n return c.json({ error: \"Unauthorized\" }, 401);\n }\n\n await sqlite.execute({\n sql: \"INSERT INTO heartbeats (timestamp) VALUES (?)\",\n args: [Date.now()],\n });\n\n return c.json({ success: true, timestamp: Date.now() });\n});\n\n// 404 handler\napp.notFound((c) => c.text(\"Not Found\", 404));\n\n// Error handler\napp.onError((err, c) => {\n console.error(\"Error:\", err);\n return c.json({ error: err.message }, 500);\n});\n\nexport default app.fetch;\n","halffullheartbeat",[157],"e4b9614a-0bda-11f1-8fcf-42dde27851f2","generate-vapid-keys.ts","f54a9e36-0bab-11f1-b64e-42dde27851f2",32,["D",1771317019322],"script","import webpush from \"npm:web-push@3.6.7\";\n\n// Run this once to generate VAPID keys for push notifications\nasync function main() {\n const vapidKeys = webpush.generateVAPIDKeys();\n\n console.log(\"\\n🔑 VAPID Keys Generated!\\n\");\n console.log(\"Add these as environment variables to your val:\\n\");\n console.log(\"VAPID_PUBLIC_KEY:\");\n console.log(vapidKeys.publicKey);\n console.log(\"\\nVAPID_PRIVATE_KEY:\");\n console.log(vapidKeys.privateKey);\n console.log(\"\\nVAPID_EMAIL (optional):\");\n console.log(\"mailto:your-email@example.com\");\n console.log(\"\\n\");\n\n return {\n publicKey: vapidKeys.publicKey,\n privateKey: vapidKeys.privateKey,\n instructions: \"Add these to your val's environment variables\",\n };\n}\n\nmain();",[167],"65cf428a-0bd7-11f1-8b5a-42dde27851f2","README.md","0a4ff5c4-0bac-11f1-9901-42dde27851f2",23,["D",1771315517900],2,"# 🖥️ Home Server Monitor\n\nA serverless monitoring solution for your home server with push notifications when it goes offline.\n\n## Features\n\n- **Real-time Status**: Check if your server is online/offline\n- **Push Notifications**: Get notified when server goes down (1+ hour without heartbeat)\n- **PWA Support**: Install as a Progressive Web App on mobile/desktop\n- **Clean Architecture**: Static files served separately for better maintainability\n\n## Project Structure\n\n```\nheartbeat/\n├── main.ts # Hono server with API routes\n├── index.html # Static HTML page\n├── client.js # Frontend JavaScript\n├── sw.js # Service Worker for push notifications\n├── monitor.ts # Interval val that checks for downtime\n├── generate-vapid-keys.ts # Script to generate VAPID keys\n└── README.md # This file\n```\n\n## Setup\n\n### 1. Generate VAPID Keys (for push notifications)\n\nRun the `generate-vapid-keys.ts` script to generate your VAPID keys.\n\n### 2. Set Environment Variables\n\nAdd these to your Val Town environment:\n- `VAPID_PUBLIC_KEY` - Public key from step 1\n- `VAPID_PRIVATE_KEY` - Private key from step 1\n\n### 3. Configure Your Server\n\nAdd a cron job to your home server that pings the heartbeat endpoint every 15 minutes:\n\n```bash\n*/15 * * * * curl -X POST https://halffullheartbeat.val.run/heartbeat\n```\n\n### 4. Enable Notifications\n\n1. Visit your deployed app\n2. Click \"Enable Notifications\"\n3. Grant notification permission\n\n## API Endpoints\n\n### `POST /heartbeat`\nYour server calls this endpoint to signal it's alive.\n\n### `GET /status`\nReturns current server status:\n```json\n{\n \"lastHeartbeat\": 1234567890000,\n \"isOnline\": true,\n \"minutesSince\": 5,\n \"currentTime\": 1234567890000\n}\n```\n\n### `POST /subscribe`\nSubscribe to push notifications (called by frontend).\n\n### `GET /vapid-public-key`\nGet VAPID public key for push subscription.\n\n## How It Works\n\n1. **Heartbeat**: Your server sends a POST request every 15 minutes to `/heartbeat`\n2. **Monitoring**: The `monitor.ts` interval val checks every 15 minutes if any heartbeat was received in the last hour\n3. **Notifications**: If server is down (no heartbeat for 1+ hour), push notifications are sent to all subscribers\n4. **Status**: Frontend polls `/status` every 30 seconds to show real-time status\n\n## Architecture Improvements\n\nThis project now uses a clean separation of concerns:\n\n- **main.ts**: Pure backend logic with Hono routes\n- **index.html**: Static HTML served as-is (no React SSR needed)\n- **client.js**: Frontend JavaScript in a separate file\n- **sw.js**: Service Worker logic in its own file\n\nBenefits:\n- ✅ Better maintainability\n- ✅ Easier debugging (proper file names in dev tools)\n- ✅ Better caching (static files cached separately)\n- ✅ No need for React imports or dangerouslySetInnerHTML\n- ✅ Cleaner codebase\n\n## Technologies\n\n- **Val Town**: Serverless hosting\n- **Hono**: Fast web framework\n- **SQLite**: Database for heartbeats and subscriptions\n- **Push API**: Browser push notifications\n- **Service Workers**: Offline support and notifications\n",[175],"pulls","branches","forks","envVars",{"_189":179,"_191":65},"connections",{"_189":65,"_190":65},"count","unfilledCount","emptyCount",{"_47":174,"_38":175,"_36":176,"_140":-5,"_45":46,"_44":177,"_142":53,"_42":210,"_13":179,"_39":26,"_40":180,"_30":53,"_145":-5,"_198":211,"_33":212},{"_47":166,"_38":167,"_36":168,"_140":-5,"_45":46,"_44":169,"_142":53,"_42":207,"_13":152,"_39":171,"_40":172,"_30":53,"_145":-5,"_198":208,"_33":209},{"_47":156,"_38":157,"_36":158,"_140":-5,"_45":46,"_44":159,"_142":53,"_42":204,"_13":161,"_39":162,"_40":163,"_30":53,"_145":164,"_198":205,"_33":206},{"_47":147,"_38":148,"_36":149,"_140":-5,"_45":46,"_44":150,"_142":53,"_42":201,"_13":152,"_39":153,"_40":154,"_30":53,"_145":-5,"_198":202,"_33":203},{"_47":137,"_38":138,"_36":139,"_140":-5,"_45":46,"_44":141,"_142":53,"_42":197,"_13":65,"_39":26,"_40":144,"_30":53,"_145":-5,"_198":199,"_33":200},["D",1771315448635],"children",[],[138],["D",1771706566424],[],[148],["D",1771707286702],[],[157],["D",1771317019322],[],[167],["D",1771315517900],[],[175],["D",1771295494247],["D",1789519256886],{"_102":101,"_109":105},{"_102":101,"_103":-5,"_104":105,"_19":59,"_106":107,"_108":53},{"_13":91,"_38":92,"_47":46,"_93":48,"_94":-5,"_95":-5,"_96":-5,"_97":-5,"_98":-5,"_99":49,"_100":101},"ctx",{"_84":-5,"_129":251,"_252":253,"_254":255,"_256":53,"_257":53,"_258":53,"_259":31,"_260":-5,"_261":-7,"_262":-7,"_263":65,"_264":53,"_265":53,"_266":-5,"_267":53,"_268":53,"_269":53,"_270":-5},"ENV",{"_222":223,"_224":225,"_226":92,"_227":228,"_229":230,"_231":232,"_233":234,"_235":236,"_237":238,"_239":240,"_241":242,"_243":244,"_245":246,"_247":248,"_249":250},"REACT_APP_SENTRY_DSN","https://586020d86f05489db63a554690acf1e9@o1398359.ingest.sentry.io/6724499","RENDER_GIT_COMMIT","e87eb04e707cf64e7e532c8e8ec395f209e17f15","RENDER_GIT_BRANCH","POSTHOG_API_TOKEN","phc_nmoyuAkStEZuUp69rYlg1DZgrIt19Gx0Y4Hwf8tGgJP","POSTHOG_API_HOST","https://wart.val.town","WEB_API_TEMPLATE","https://{val}.web.val.run","APP_URL","https://www.val.town","MODULE_URL","https://esm.town","VANITY_WEB_API_TEMPLATE","https://{label}.val.run/","DENOLS_URL","https://lsp.val.town","NODE_ENV","production","CLOUDFLARE_TURNSTILE_SITE_KEY","0x4AAAAAACtaIZJH7s9rBMZ6","GOOGLE_CLIENT_ID","875989696899-jtsqkhlbdv5jrlsk8631p7ipjg3c6o62.apps.googleusercontent.com","STRIPE_PUBLISHABLE_KEY","pk_live_51N2zvWEpZTTLipIkVEwXrUG9AT0yeOOEYxszarZT1jpsZV58Ly6wlg3SltZpHN26CUalOBmUSY7adQRQiSkCZz2500qSXNkf8Y","API_URL","https://api.val.town",[],"preferencesKeybindings","default","preferencesTheme","light","preferencesFixers","preferencesCopilot","preferencesSelectionAi","preferencesCloseBrackets","preferencesChatPanelState","preferencesDprint","preferencesDenofmt","notificationCount","flagDenols","isBusinessOrgMember","businessOrgHandle","isBusinessOrgAdmin","isHigherTownieTier","navCollapsed","currentOrgId"]

Diff · v47