Application for notifying about free seats in popular restaurants. Uses telegram to send notifications.

• Actual logic to check for seats and send notifications accordingly
• Format sent telegram messages nicely
• CI Pipeline to deploy as scheduled Azure Function
• Terraform to manage infrastructure
• Support multiple chat ids: in webhook use chat id from request and in timer, store chat id where to send the results to
• Add persistence
  • Store sent notifications so there are not duplicate notification about the same seat
  • Neon
  • Supabase
  • CockroachDB serverless
  • Azure SQL
• Telegram bot webhook
  • Check secret_token from request header
  • Support adding new restaurants dynamically
  • Autocomplete for bot commands
  • Support inline_query to enable interacting with the bot from any chat/conversation
  • Register webhook automatically using setWebhook during deployment/startup?
• Combine multiple free seats together in one message

• Dinnerbooking.com

• Scala/SBT for building
• Docker for local blob storage
• Telegram bot token and chat ID

Create a .env file in the project root with your Telegram credentials:

TELEGRAM_CHATID=<your-chat-id>
TELEGRAM_BOTTOKEN=<your-bot-token>
TELEGRAM_SECRETTOKEN=<your-secret-token>

The .env file should be loaded into your environment. If using nix-direnv or dotenv, it will be loaded automatically.

1. Ensure environment variables from .env file are loaded before starting SBT.
2. Run sbt run

1. Ensure Azure Functions Core Tools (v4) are available (automatically included in nix dev shell)
2. Start blob storage: docker compose up
3. Build the application: sbt assembly
4. Navigate to azure-functions folder
5. Start the function: func start

The application infrastructure is managed with Terraform and applied as part of deployment process in GitHub Actions.

1. Azure setup
   • Create an Azure subscription
   • Create a service principal for GitHub Actions:

     az ad sp create-for-rbac --name "seat-stalker-github" --role contributor --scopes /subscriptions/{subscription-id} --json-auth

   • Create storage account for Terraform state:

     az group create --name <resource-group> --location <location>
     az storage account create --name <storage-account> --resource-group <resource-group> --location <location> --sku Standard_LRS
     az storage container create --name tfstate --account-name <storage-account>

2. GitHub secrets Add these secrets to your GitHub repository (Settings → Secrets and variables → Actions):
   • AZURE_CREDENTIALS - JSON output from service principal creation
     • Required properties: clientId, clientSecret, subscriptionId, tenantId
   • TELEGRAM_CHAT_ID - Your Telegram chat ID
   • TELEGRAM_BOT_TOKEN - Your Telegram bot token
   • TELEGRAM_SECRET_TOKEN - Your Telegram secret token
   • EMAIL_ALERT_RECIPIENT - Email for Azure alerts