This service delivers web push notifications for chat messages and QR code events in HereConnect. It listens for changes in CouchDB and sends push notifications to users.
## Features
- Monitors CouchDB for new messages.
- Sends push notifications to owners and guests.
- Configurable notification settings.
- Health server for monitoring.
## Prerequisites
- Node.js >= 14.x
- CouchDB server
- VAPID credentials
## Installation
```bash
npm install
```
## Running the Service
```bash
npm start
```
## Usage
The service listens for changes in messages and sends notifications when a new message is created if the recipient has enabled push notifications.
## Notifications are sent for:
1. Messages from Guests: Sends to owners.
2. Messages from Owners: Sends to guests if enabled.
## Key Components
- CouchDBChangesStream: Listens to CouchDB changes.
- ServiceSeqTracker: Tracks sequence numbers to prevent missed messages.
- Web Push Notifications: Uses web-push library.
- Health Server: Monitors service status.
## Notifications
New messages: Sends a push notification with title, body, and link to the chat.
## Error Handling
Logs errors when sending notifications.
Tracks sequence to avoid missed messages.
## Graceful Shutdown
Handles SIGINT to stop CouchDB changes stream and clean up.
## Health Monitoring
Includes a health server for checking service status.
