# Telegram AI Assistant for n8n

AI-powered Telegram bot that helps you manage tasks in Nextcloud Deck, search emails via IMAP, and chat with OpenAI - all controlled through Telegram commands.

## Features

🤖 **AI-Powered Assistant**
- Natural language task creation with date extraction
- Smart email search and summarization
- General AI chat capabilities using GPT-4o-mini

📋 **Nextcloud Deck Integration**
- Add tasks directly from Telegram
- AI extracts task details, due dates, descriptions
- Supports German date formats (morgen, übermorgen)

📧 **IMAP Email Search**
- Search your inbox from Telegram
- View recent emails
- AI-formatted summaries

## Architecture

The system consists of 4 n8n workflows:

1. **telegram-receiver.json** - Telegram webhook listener
   - Receives all Telegram messages
   - Parses commands vs natural language
   - Routes to main router workflow

2. **telegram-router.json** - Command router
   - Switches on command type (/deck, /email, /ask, /help)
   - Handles help and start messages
   - Delegates to specialized workflows

3. **telegram-deck.json** - Nextcloud Deck integration
   - Processes `/deck` commands
   - Uses OpenAI to extract task details
   - Calls existing `/home/node/create_card_from_ai.sh` script

4. **telegram-email.json** - IMAP email search
   - Processes `/email` commands
   - Searches IMAP inbox with configured credentials
   - Formats results for Telegram

5. **telegram-ai.json** - AI chat
   - Processes `/ask` commands
   - Calls OpenAI API for general questions
   - Returns formatted Markdown responses

## Setup

### Prerequisites

- n8n instance running at `https://flow.egonetix.de/`
- Telegram bot token (already configured as credential `Csk5cg4HtaSqP5jJ`)
- OpenAI API key (already configured as `openai_api_key`)
- IMAP credentials (already configured as `BntHPR3YbFD5jAIM`)
- Nextcloud Deck accessible at `https://nextcloud.egonetix.de/`

### Installation

1. **Import workflows into n8n:**
   ```bash
   cd /home/icke/assistant
   ./import_workflows.sh
   ```

2. **Configure Telegram webhook:**
   - Get your bot token from BotFather
   - Set webhook URL to: `https://flow.egonetix.de/webhook/8f3f59db-aaa5-4762-9416-94be04131fd2`
   - Command:
     ```bash
     curl -X POST "https://api.telegram.org/bot<YOUR_BOT_TOKEN>/setWebhook" \
       -H "Content-Type: application/json" \
       -d '{"url":"https://flow.egonetix.de/webhook/8f3f59db-aaa5-4762-9416-94be04131fd2"}'
     ```

3. **Activate all workflows in n8n UI:**
   - Open n8n at https://flow.egonetix.de/
   - Go to each workflow and click "Active"
   - Verify webhook endpoints are listening

### Telegram Bot Commands

```
/start          - Welcome message and feature overview
/help           - Show all available commands

📋 Deck Commands:
/deck add <task>         - Add task to Nextcloud Deck
                          Example: /deck add Review Q4 reports by Friday
/deck list              - List tasks (coming soon)

📧 Email Commands:
/email search <query>   - Search your inbox
                          Example: /email search invoice November
/email recent           - Show 5 most recent emails

💬 AI Commands:
/ask <question>         - Ask AI anything
                          Example: /ask What's the weather like today?
```

## Technical Details

### Credentials Used

- **Telegram API** (`Csk5cg4HtaSqP5jJ`)
  - Bot token for sending/receiving messages
  
- **OpenAI API** (`openai_api_key`)
  - Model: `gpt-4o-mini`
  - Used for task extraction and AI chat
  
- **IMAP** (`BntHPR3YbFD5jAIM`)
  - Server: `imap.egonetix.de:993`
  - SSL enabled, read-only mode

### Workflow Communication

Workflows communicate via internal HTTP webhooks:
- Main receiver → Router: `http://localhost:8098/webhook/telegram-router`
- Router → Deck: `http://localhost:8098/webhook/telegram-deck`
- Router → Email: `http://localhost:8098/webhook/telegram-email`
- Router → AI: `http://localhost:8098/webhook/telegram-ai`

### Nextcloud Deck Integration

Uses existing bash script at `/home/node/create_card_from_ai.sh`:
```bash
/home/node/create_card_from_ai.sh "<title>" "<description>" "<duedate>"
```

The script handles:
- Authentication with Nextcloud
- Board/stack selection (hardcoded to board 1, stack 1)
- Card creation via Deck API
- Returns success/error status

### AI Task Extraction

OpenAI prompt for extracting task details:
```
Extract task information from user input. Return JSON with:
- title (required, concise task name)
- description (optional, details)
- duedate (optional, YYYY-MM-DD format)

For German dates like 'morgen', 'übermorgen', calculate from today.
```

## Security Considerations

⚠️ **Current Status:**
- n8n password is weak (`changeme`) - **CHANGE THIS**
- Nextcloud credentials hardcoded in bash scripts
- OpenAI API key exposed in multiple files
- No rate limiting on Telegram commands

🔒 **Recommendations:**
1. Change n8n admin password
2. Migrate credentials to n8n credential store
3. Rotate OpenAI API key after migration
4. Implement user authentication/whitelisting
5. Add rate limiting to prevent abuse
6. Enable n8n execution logging

## Troubleshooting

### Webhook Not Receiving Messages
```bash
# Check Telegram webhook status
curl "https://api.telegram.org/bot<TOKEN>/getWebhookInfo"

# Verify n8n workflow is active
curl https://flow.egonetix.de/webhook/8f3f59db-aaa5-4762-9416-94be04131fd2

# Check n8n logs
docker logs n8n
```

### Deck Card Creation Fails
```bash
# Test bash script manually
docker exec n8n /home/node/create_card_from_ai.sh "Test Task" "Description" ""

# Verify Nextcloud credentials
curl -u robert.wiegand:November1985** \
  https://nextcloud.egonetix.de/index.php/apps/deck/api/v1.0/boards
```

### OpenAI API Errors
- Check API key validity in n8n credentials
- Verify quota not exceeded
- Check model availability (gpt-4o-mini)

### IMAP Connection Issues
- Verify credentials in n8n: `BntHPR3YbFD5jAIM`
- Test IMAP connection: `openssl s_client -connect imap.egonetix.de:993`
- Check mailbox name (should be "INBOX")

## Development

### Testing Workflows Locally

Use n8n's webhook test feature or curl:

```bash
# Test router
curl -X POST http://localhost:8098/webhook/telegram-router \
  -H "Content-Type: application/json" \
  -d '{
    "command": "/help",
    "args": "",
    "chatId": "579304651",
    "userId": 123456,
    "username": "testuser"
  }'

# Test deck workflow
curl -X POST http://localhost:8098/webhook/telegram-deck \
  -H "Content-Type: application/json" \
  -d '{
    "command": "/deck",
    "args": "add Test task for tomorrow",
    "chatId": "579304651"
  }'
```

### Extending Functionality

To add new commands:

1. Add case in **telegram-router.json** Switch node
2. Create new workflow with webhook endpoint
3. Update router to call new workflow
4. Update help text in `/help` command
5. Import updated workflows

### Monitoring

View execution history in n8n:
- Go to https://flow.egonetix.de/
- Click "Executions" tab
- Filter by workflow name
- Check for errors or slow executions

## Future Enhancements

🚀 **Planned Features:**
- [ ] Deck task listing and completion
- [ ] Calendar integration for appointments
- [ ] Multi-turn conversations with context
- [ ] Voice message transcription (Whisper)
- [ ] Document upload to Nextcloud
- [ ] Scheduled reminders
- [ ] User authentication/whitelisting
- [ ] Analytics dashboard

## Credits

- Built on existing credit card workflow patterns
- Uses proven integration with Nextcloud Deck API
- Leverages existing IMAP and OpenAI credentials
- Telegram bot token from existing infrastructure

## License

Internal tool for personal use on srvdocker02.

---

**Author:** AI Assistant  
**Created:** 2025-12-02  
**n8n Version:** 1.19.4  
**Infrastructure:** srvdocker02