# WhatsApp Gateway Service
A lightweight service for sending WhatsApp messages with PDF attachments through Qontak API. Supports multiple message types and provides automatic retries for failed messages.

## Configuration
Create a `config-gw-wa.json` file in the root directory:
```json
{
  "base_url": "https://cpone.aplikasi.web.id/one-api/",
  "schedule": [
    "*/2 6-20 * * *"  // Runs every 2 minutes from 6 AM to 8 PM
  ],
  "startDate": "2023-08-01",  // Filter T_OrderHeaderDate from this date (YYYY-MM-DD)
  "endDate": "2025-12-30"     // Filter T_OrderHeaderDate until this date (YYYY-MM-DD)
}
```

## Supported Message Types
* MCU Result: Medical checkup results with PDF attachment
* Payment Receipt: Payment receipts with PDF attachment

## Installation
```bash
# Install dependencies
npm install

# Format code
npm run format
```

## Build & Run
```bash
# Build TypeScript source
npm run build

# Compile to executable
npm run compile

# Run the application
npm run start

# Or build, compile and start in one command
npm run bcs
```

## Run Compiled File
```sh
# Dijalankan di lokasi yang sama dengan `config-gw-wa.json`
node ./dist/gw-wa.js
```

## Development Notes
The gateway checks for outbox items with status:

* N: New messages
* E: Error messages (with retry logic, max 5 attempts)
* R: Rejected messages

Each message type uses its own API endpoints for: 
* listing, 
* uploading files, 
* sending messages, 
* then updating status.