# du.pe - API Documentation

## 🔌 API Overview

The du.pe server provides a RESTful API with WebSocket support for managing torrents, streaming media, and handling file operations. The API is designed to be simple, intuitive, and provides real-time updates through WebSocket connections.

**Base URL**: `http://localhost:3001` (configurable via environment)

## 📡 WebSocket Connection

### **Connection Endpoint**
```
ws://localhost:3001/?token={auth_token}
```

### **WebSocket Events**

#### **Progress Updates**
```json
{
  "type": "progress",
  "torrents": [
    {
      "infoHash": "abc123...",
      "name": "Example Movie",
      "progress": 0.75,
      "downloadSpeed": 1048576,
      "uploadSpeed": 524288,
      "numPeers": 15,
      "state": "downloading",
      "timeRemaining": 1800
    }
  ]
}
```

#### **File Updates**
```json
{
  "type": "fileUpdate",
  "action": "added|removed|modified",
  "path": "/downloads/example/",
  "mediaType": "movie|tvshow|file"
}
```

## 🛣️ REST API Endpoints

### **Torrent Management**

#### **GET /api/torrents**
**Description**: Retrieve list of active torrents and their status

**Response**:
```json
{
  "torrents": [
    {
      "infoHash": "abc123def456...",
      "name": "Example Movie 2024",
      "progress": 0.85,
      "downloadSpeed": 2097152,
      "uploadSpeed": 1048576,
      "numPeers": 25,
      "state": "downloading",
      "timeRemaining": 600,
      "files": [
        {
          "name": "movie.mp4",
          "length": 1073741824,
          "path": "/downloads/example/movie.mp4",
          "type": "video"
        }
      ],
      "magnetURI": "magnet:?xt=urn:btih:abc123...",
      "added": "2024-01-15T10:30:00.000Z"
    }
  ]
}
```

**Response Codes**:
- `200` - Success
- `500` - Server error

---

#### **POST /api/transfer**
**Description**: Add a torrent via file upload

**Content-Type**: `multipart/form-data`

**Request Body**:
```
torrent: [file] - .torrent file
```

**Response**:
```json
{
  "success": true,
  "infoHash": "abc123def456...",
  "name": "Uploaded Torrent Name"
}
```

**Response Codes**:
- `200` - Torrent added successfully
- `400` - Invalid torrent file
- `500` - Server error

---

#### **POST /api/magnet**
**Description**: Add a torrent via magnet link

**Content-Type**: `application/json`

**Request Body**:
```json
{
  "magnet": "magnet:?xt=urn:btih:abc123def456..."
}
```

**Response**:
```json
{
  "success": true,
  "infoHash": "abc123def456...",
  "name": "Torrent Name from Magnet"
}
```

**Response Codes**:
- `200` - Torrent added successfully
- `400` - Invalid magnet link
- `500` - Server error

---

#### **DELETE /api/torrents/:infoHash**
**Description**: Remove a torrent and optionally delete downloaded files

**Request Parameters**:
- `infoHash` (path): Torrent info hash
- `deleteFiles` (query, optional): `true` to delete downloaded files

**Response**:
```json
{
  "success": true,
  "message": "Torrent removed successfully"
}
```

**Response Codes**:
- `200` - Torrent removed successfully
- `404` - Torrent not found
- `500` - Server error

---

### **File Streaming**

#### **GET /stream/:infoHash/:fileIndex**
**Description**: Stream a file from a torrent

**Request Parameters**:
- `infoHash` (path): Torrent info hash
- `fileIndex` (path): Index of the file within the torrent
- `range` (header, optional): HTTP Range header for partial content

**Response**:
- Binary file stream with appropriate MIME headers
- Supports HTTP Range requests for seeking in video files

**Response Codes**:
- `200` - Streaming successfully
- `206` - Partial content (range requests)
- `404` - File not found
- `500` - Server error

**Example Usage**:
```javascript
// HTML5 Video Player
<video controls>
  <source src="http://localhost:3001/stream/abc123def456/0" type="video/mp4">
</video>
```

---

### **Media Library**

#### **GET /api/movies**
**Description**: Retrieve movie library with metadata

**Query Parameters**:
- `page` (optional): Page number for pagination
- `limit` (optional): Items per page
- `search` (optional): Search term
- `genre` (optional): Filter by genre
- `year` (optional): Filter by year

**Response**:
```json
{
  "movies": [
    {
      "id": "movie_123",
      "title": "Example Movie",
      "year": 2024,
      "runtime": 120,
      "rating": 8.5,
      "genres": ["Action", "Drama"],
      "poster": "/cache/movie_data/123/poster.jpg",
      "backdrop": "/cache/movie_data/123/backdrop.jpg",
      "overview": "Movie description...",
      "filePath": "/downloads/example/movie.mp4",
      "fileSize": 1073741824,
      "added": "2024-01-15T10:30:00.000Z",
      "watched": false,
      "thumbnail": "/cache/thumbnails/videos/123/movie.jpg"
    }
  ],
  "pagination": {
    "page": 1,
    "limit": 20,
    "total": 45,
    "totalPages": 3
  }
}
```

---

#### **GET /api/tvshows**
**Description**: Retrieve TV show library with metadata

**Query Parameters**:
- `page` (optional): Page number for pagination
- `limit` (optional): Items per page
- `search` (optional): Search term

**Response**:
```json
{
  "shows": [
    {
      "id": "show_456",
      "title": "Example TV Series",
      "year": 2023,
      "rating": 9.0,
      "seasons": 2,
      "poster": "/cache/tv_data/456/poster.jpg",
      "backdrop": "/cache/tv_data/456/backdrop.jpg",
      "overview": "Series description...",
      "episodes": [
        {
          "season": 1,
          "episode": 1,
          "title": "Pilot Episode",
          "overview": "Episode description...",
          "airDate": "2023-01-15",
          "filePath": "/downloads/example/series/s01e01.mp4",
          "thumbnail": "/cache/tv_data/456/episodes/s01e01.jpg"
        }
      ]
    }
  ],
  "pagination": {
    "page": 1,
    "limit": 20,
    "total": 12,
    "totalPages": 1
  }
}
```

---

#### **GET /api/files**
**Description**: Browse downloaded files and folders

**Query Parameters**:
- `path` (optional): Directory path to browse (default: root downloads)
- `type` (optional): Filter by file type (`video`, `audio`, `image`, `document`)

**Response**:
```json
{
  "path": "/downloads/",
  "parent": "..",
  "items": [
    {
      "name": "Example Folder",
      "type": "directory",
      "path": "/downloads/Example Folder/",
      "size": null,
      "modified": "2024-01-15T10:30:00.000Z",
      "count": 5
    },
    {
      "name": "movie.mp4",
      "type": "file",
      "path": "/downloads/movie.mp4",
      "size": 1073741824,
      "modified": "2024-01-15T10:30:00.000Z",
      "mimeType": "video/mp4",
      "thumbnail": "/cache/thumbnails/videos/abc123/movie.jpg"
    }
  ]
}
```

---

### **Search Functionality**

#### **GET /api/search**
**Description**: Search across torrents, files, and media library

**Query Parameters**:
- `q` (required): Search query
- `type` (optional): Search scope (`all`, `torrents`, `movies`, `tvshows`, `files`)
- `limit` (optional): Maximum results (default: 50)

**Response**:
```json
{
  "query": "example",
  "results": {
    "torrents": [
      {
        "infoHash": "abc123...",
        "name": "Example Torrent",
        "progress": 0.75,
        "state": "downloading"
      }
    ],
    "movies": [
      {
        "id": "movie_123",
        "title": "Example Movie",
        "year": 2024,
        "poster": "/cache/movie_data/123/poster.jpg"
      }
    ],
    "tvshows": [],
    "files": [
      {
        "name": "example.txt",
        "path": "/downloads/example.txt",
        "size": 1024,
        "type": "file"
      }
    ]
  },
  "total": 3
}
```

---

### **System Information**

#### **GET /api/system/info**
**Description**: Get system information and status

**Response**:
```json
{
  "version": "1.2.0",
  "uptime": 86400,
  "torrents": {
    "active": 3,
    "completed": 15,
    "total": 18
  },
  "storage": {
    "total": 1099511627776,
    "used": 536870912000,
    "free": 562641715776,
    "downloads": 500000000000,
    "cache": 36870912000
  },
  "network": {
    "downloadSpeed": 2097152,
    "uploadSpeed": 1048576
  }
}
```

---

#### **GET /api/system/disk**
**Description**: Get detailed disk usage information

**Response**:
```json
{
  "downloads": {
    "path": "/app/server/downloads",
    "total": 1000000000000,
    "used": 500000000000,
    "free": 500000000000,
    "percentage": 50
  },
  "cache": {
    "path": "/app/server/cache",
    "total": 100000000000,
    "used": 20000000000,
    "free": 80000000000,
    "percentage": 20
  }
}
```

---

### **Trash Management**

#### **GET /api/trash**
**Description**: List items in trash

**Response**:
```json
{
  "items": [
    {
      "id": "trash_123",
      "originalPath": "/downloads/example.mp4",
      "name": "example.mp4",
      "size": 1073741824,
      "deleted": "2024-01-15T10:30:00.000Z",
      "type": "file"
    }
  ],
  "total": 1,
  "totalSize": 1073741824
}
```

---

#### **POST /api/trash/:id/restore**
**Description**: Restore item from trash

**Request Parameters**:
- `id` (path): Trash item ID

**Response**:
```json
{
  "success": true,
  "message": "Item restored successfully",
  "restoredPath": "/downloads/example.mp4"
}
```

---

#### **DELETE /api/trash/:id**
**Description**: Permanently delete item from trash

**Request Parameters**:
- `id` (path): Trash item ID

**Response**:
```json
{
  "success": true,
  "message": "Item permanently deleted"
}
```

---

#### **DELETE /api/trash**
**Description**: Empty trash (permanently delete all items)

**Response**:
```json
{
  "success": true,
  "message": "Trash emptied successfully",
  "deletedCount": 5
}
```

---

## 🔒 Authentication (Planned)

### **Token-Based Authentication**
Currently, the application uses basic token authentication. Full authentication system is planned for future versions.

**Headers**:
```
Authorization: Bearer {token}
```

### **Login Endpoint (Planned)**
```
POST /api/auth/login
```

### **Logout Endpoint (Planned)**
```
POST /api/auth/logout
```

---

## 📊 Error Handling

### **Standard Error Response Format**
```json
{
  "error": {
    "code": "VALIDATION_ERROR",
    "message": "Invalid magnet link format",
    "details": "The provided magnet link is not properly formatted"
  }
}
```

### **Common Error Codes**
- `400 Bad Request` - Invalid input parameters
- `401 Unauthorized` - Authentication required
- `403 Forbidden` - Insufficient permissions
- `404 Not Found` - Resource not found
- `429 Too Many Requests` - Rate limit exceeded
- `500 Internal Server Error` - Server-side error

### **WebSocket Error Events**
```json
{
  "type": "error",
  "code": "TORRENT_ERROR",
  "message": "Failed to add torrent",
  "details": "Invalid torrent file format"
}
```

---

## 🔄 Rate Limiting

### **Current Limits**
- API requests: No current limits (planned)
- File uploads: 100MB per file
- Concurrent torrents: No hard limit
- WebSocket connections: Standard browser limits

### **Planned Enhancements**
- API rate limiting by IP/user
- Upload size limits
- Concurrent download limits
- Connection throttling

---

## 🧭 Usage Examples

### **JavaScript/TypeScript Client**
```javascript
// API client setup
const API_BASE = 'http://localhost:3001';

class DupeAPI {
  constructor(apiUrl) {
    this.apiUrl = apiUrl;
  }

  async getTorrents() {
    const response = await fetch(`${this.apiUrl}/api/torrents`);
    return response.json();
  }

  async addMagnet(magnetLink) {
    const response = await fetch(`${this.apiUrl}/api/magnet`, {
      method: 'POST',
      headers: { 'Content-Type': 'application/json' },
      body: JSON.stringify({ magnet: magnetLink })
    });
    return response.json();
  }

  async getMovies(page = 1, limit = 20) {
    const params = new URLSearchParams({ page, limit });
    const response = await fetch(`${this.apiUrl}/api/movies?${params}`);
    return response.json();
  }

  connectWebSocket(token) {
    const ws = new WebSocket(`${this.apiUrl.replace('http', 'ws')}?token=${token}`);

    ws.onmessage = (event) => {
      const data = JSON.parse(event.data);
      if (data.type === 'progress') {
        // Handle progress updates
        console.log('Torrent progress:', data.torrents);
      }
    };

    return ws;
  }
}

// Usage
const api = new DupeAPI(API_BASE);
const torrents = await api.getTorrents();
const ws = api.connectWebSocket('your-token');
```

### **cURL Examples**
```bash
# Get torrents
curl -X GET http://localhost:3001/api/torrents

# Add magnet link
curl -X POST http://localhost:3001/api/magnet \
  -H "Content-Type: application/json" \
  -d '{"magnet":"magnet:?xt=urn:btih:abc123..."}'

# Upload torrent file
curl -X POST http://localhost:3001/api/transfer \
  -F "torrent=@/path/to/file.torrent"

# Get system info
curl -X GET http://localhost:3001/api/system/info
```

---

## 📚 Cross-References

### **Related Documentation**
- [Project Structure](./project-structure.md) - Overall architecture overview
- [Component Documentation](./components.md) - Frontend component details
- [Deployment Guide](./deployment.md) - Production setup instructions
- [WebSocket Events](./websocket-events.md) - Real-time event reference

### **Implementation Files**
- [server/server.js](../server/server.js) - Main API implementation
- [client/src/utils/api.js](../client/src/utils/api.js) - Frontend API client
- [client/src/stores/](../client/src/stores/) - State management stores

---

*This API documentation provides comprehensive coverage of all available endpoints, WebSocket events, and usage patterns. For implementation details and examples, refer to the cross-referenced files and documentation.*