# Add Hub Feature - Implementation Summary
## Overview
Successfully implemented the `add_hub` MCP tool for the Plugwise MCP Server, allowing clients to add new Plugwise hubs by scanning the network with a specific hub name/password.
## Changes Made
### 1. Created New Tool: `add-hub.tool.ts`
- **Location**: `/home/tom/plugwise/src/mcp/tools/add-hub.tool.ts`
- **Purpose**: MCP tool that handles adding hubs by name
- **Features**:
- Validates hub name input (required parameter)
- Shows syntax help if no hub name is provided
- Calls discovery service to scan network for the hub
- Returns formatted success/error messages
### 2. Enhanced Hub Discovery Service
- **Location**: `/home/tom/plugwise/src/services/hub-discovery.service.ts`
- **New Methods**:
- `addHubByName(hubName: string)`: Main method to add a hub by scanning the network
- `saveHubToFile(hubName: string, hub: DiscoveredHub)`: Saves hub data to JSON file
- `loadHubFromFile(hubName: string)`: Loads hub data from JSON file
- `loadAllHubsFromFiles()`: Loads all hubs from the `/hubs` folder
- `scanForSpecificHub(network: string, hubName: string)`: Scans network for a specific hub
- **New Properties**:
- `hubsDirectory`: Path to the `/hubs` folder for storing hub files
### 3. Updated MCP Server
- **Location**: `/home/tom/plugwise/src/mcp/server.ts`
- **Changes**:
- Added `add_hub` tool to the tool list
- Implemented `handleAddHub()` method
- Added tool to the switch statement in `handleToolCall()`
- Updated console output to include the new tool
### 4. Registered Tool in Index
- **Location**: `/home/tom/plugwise/src/mcp/tools/index.ts`
- **Changes**:
- Imported `registerAddHubTool`
- Called `registerAddHubTool` in `registerAllTools()`
### 5. Created Hub Storage Directory
- **Location**: `/home/tom/plugwise/hubs/`
- **Purpose**: Persistent storage for discovered hub configurations
- **File Format**: `<hub-name>.json`
### 6. Documentation
- **Added**: `/home/tom/plugwise/docs/add-hub-guide.md`
- Complete usage guide
- Examples and syntax
- Error handling documentation
- Security considerations
### 7. Test Script
- **Added**: `/home/tom/plugwise/scripts/test-add-hub.ts`
- Tests adding a hub by name
- Verifies file creation
- Tests loading hubs from files
- Updated `/home/tom/plugwise/scripts/README.md`
## How It Works
1. **Client invokes tool**: `add_hub` with `{ "hubName": "glmpuuxg" }`
2. **Validation**: System checks if hub name is provided
3. **Check existing file**: Looks for existing hub file in `/hubs` folder
4. **Network scan**: Scans local network (auto-detected or specified) for the hub
5. **Connection test**: Tests each IP with the provided hub name as password
6. **Save to file**: Once found, saves hub info to `/hubs/<hub-name>.json`
7. **In-memory storage**: Also stores in discovery service for immediate use
## File Structure
### Hub JSON File Format
```json
{
"name": "Adam",
"ip": "192.168.1.100",
"password": "glmpuuxg",
"model": "Gateway",
"firmware": "3.7.8",
"discoveredAt": "2025-10-16T10:30:00.000Z"
}
```
## Usage Examples
### Valid Usage
```json
{
"name": "add_hub",
"arguments": {
"hubName": "glmpuuxg"
}
}
```
**Response:**
```
✅ Hub found and added successfully!
Hub Details:
Name: Adam
IP: 192.168.1.100
Model: Gateway
Firmware: 3.7.8
The hub has been saved to: /hubs/glmpuuxg.json
```
### Invalid Usage (No Hub Name)
```json
{
"name": "add_hub",
"arguments": {}
}
```
**Response:**
```
❌ Hub name is required.
Usage: Call add_hub tool with hubName parameter
Example: { "hubName": "glmpuuxg" }
The hub name is the unique identifier/password for your Plugwise hub.
```
### Hub Not Found
```json
{
"name": "add_hub",
"arguments": {
"hubName": "invalidhub"
}
}
```
**Response:**
```
❌ Hub "invalidhub" not found on network 192.168.1.0/24.
Please ensure the hub is connected and the name is correct.
```
## Security Considerations
- Hub passwords are stored in plain text in JSON files
- The `/hubs` folder is already in `.gitignore` to prevent accidental commits
- Users should ensure proper file permissions on the `/hubs` folder
- Recommended to keep hub files private and not share publicly
## Testing
Run the test script:
```bash
tsx scripts/test-add-hub.ts glmpuuxg
```
Or test by calling the `add_hub` tool through an MCP client.
## Build Status
✅ Project builds successfully with TypeScript compilation
✅ No compilation errors
✅ All imports resolved correctly
✅ Type safety maintained throughout
## Future Enhancements
Potential improvements:
1. Add encryption for stored passwords
2. Support for custom network ranges
3. Bulk import from CSV
4. Hub management commands (list, remove, update)
5. Export/import hub configurations
