hf-data-engine/docs/archive/README_PREVIOUS.md

# Cryptocurrency Data Aggregator - Complete Rewrite

A production-ready cryptocurrency data aggregation application with AI-powered analysis, real-time data collection, and an interactive Gradio dashboard.

## Features

### Core Capabilities
- **Real-time Price Tracking**: Monitor top 100 cryptocurrencies with live updates
- **AI-Powered Sentiment Analysis**: Using HuggingFace models for news sentiment
- **Market Analysis**: Technical indicators (MA, RSI), trend detection, predictions
- **News Aggregation**: RSS feeds from CoinDesk, Cointelegraph, Bitcoin.com, and Reddit
- **Interactive Dashboard**: 6-tab Gradio interface with auto-refresh
- **SQLite Database**: Persistent storage with full CRUD operations
- **No API Keys Required**: Uses only free data sources

### Data Sources (All Free, No Authentication)
- **CoinGecko API**: Market data, prices, rankings
- **CoinCap API**: Backup price data source
- **Binance Public API**: Real-time trading data
- **Alternative.me**: Fear & Greed Index
- **RSS Feeds**: CoinDesk, Cointelegraph, Bitcoin Magazine, Decrypt, Bitcoinist
- **Reddit**: r/cryptocurrency, r/bitcoin, r/ethtrader, r/cryptomarkets

### AI Models (HuggingFace - Local Inference)
- **cardiffnlp/twitter-roberta-base-sentiment-latest**: Social media sentiment
- **ProsusAI/finbert**: Financial news sentiment
- **facebook/bart-large-cnn**: News summarization

## Project Structure

```
crypto-dt-source/
├── config.py          # Configuration constants
├── database.py        # SQLite database with CRUD operations
├── collectors.py      # Data collection from all sources
├── ai_models.py       # HuggingFace model integration
├── utils.py           # Helper functions and utilities
├── app.py             # Main Gradio application
├── requirements.txt   # Python dependencies
├── README.md          # This file
├── data/
│   ├── database/      # SQLite database files
│   └── backups/       # Database backups
└── logs/
    └── crypto_aggregator.log  # Application logs
```

## Installation

### Prerequisites
- Python 3.8 or higher
- 4GB+ RAM (for AI models)
- Internet connection

### Step 1: Clone Repository
```bash
git clone <repository-url>
cd crypto-dt-source
```

### Step 2: Install Dependencies
```bash
pip install -r requirements.txt
```

This will install:
- Gradio (web interface)
- Pandas, NumPy (data processing)
- Transformers, PyTorch (AI models)
- Plotly (charts)
- BeautifulSoup4, Feedparser (web scraping)
- And more...

### Step 3: Run Application
```bash
python app.py
```

The application will:
1. Initialize the SQLite database
2. Load AI models (first run may take 2-3 minutes)
3. Start background data collection
4. Launch Gradio interface

Access the dashboard at: **http://localhost:7860**

## Gradio Dashboard

### Tab 1: Live Dashboard 📊
- Top 100 cryptocurrencies with real-time prices
- Columns: Rank, Name, Symbol, Price, 24h Change, Volume, Market Cap
- Auto-refresh every 30 seconds
- Search and filter functionality
- Color-coded price changes (green/red)

### Tab 2: Historical Charts 📈
- Select any cryptocurrency
- Choose timeframe: 1d, 7d, 30d, 90d, 1y, All
- Interactive Plotly charts with:
  - Price line chart
  - Volume bars
  - MA(7) and MA(30) overlays
  - RSI indicator
- Export charts as PNG

### Tab 3: News & Sentiment 📰
- Latest cryptocurrency news from 9+ sources
- Filter by sentiment: All, Positive, Neutral, Negative
- Filter by coin: BTC, ETH, etc.
- Each article shows:
  - Title (clickable link)
  - Source and date
  - AI-generated sentiment score
  - Summary
  - Related coins
- Market sentiment gauge (0-100 scale)

### Tab 4: AI Analysis 🤖
- Select cryptocurrency
- Generate AI-powered analysis:
  - Current trend (Bullish/Bearish/Neutral)
  - Support/Resistance levels
  - Technical indicators (RSI, MA7, MA30)
  - 24-72h prediction
  - Confidence score
- Analysis saved to database for history

### Tab 5: Database Explorer 🗄️
- Pre-built SQL queries:
  - Top 10 gainers in last 24h
  - All positive sentiment news
  - Price history for any coin
  - Database statistics
- Custom SQL query support (read-only for security)
- Export results to CSV

### Tab 6: Data Sources Status 🔍
- Real-time status monitoring:
  - CoinGecko API ✓
  - CoinCap API ✓
  - Binance API ✓
  - RSS feeds (5 sources) ✓
  - Reddit endpoints (4 subreddits) ✓
  - Database connection ✓
- Shows: Status (🟢/🔴), Last Update, Error Count
- Manual refresh and data collection controls
- Error log viewer

## Database Schema

### `prices` Table
- `id`: Primary key
- `symbol`: Coin symbol (e.g., "bitcoin")
- `name`: Full name (e.g., "Bitcoin")
- `price_usd`: Current price in USD
- `volume_24h`: 24-hour trading volume
- `market_cap`: Market capitalization
- `percent_change_1h`, `percent_change_24h`, `percent_change_7d`: Price changes
- `rank`: Market cap rank
- `timestamp`: Record timestamp

### `news` Table
- `id`: Primary key
- `title`: News article title
- `summary`: AI-generated summary
- `url`: Article URL (unique)
- `source`: Source name (e.g., "CoinDesk")
- `sentiment_score`: Float (-1 to 1)
- `sentiment_label`: Label (positive/negative/neutral)
- `related_coins`: JSON array of coin symbols
- `published_date`: Original publication date
- `timestamp`: Record timestamp

### `market_analysis` Table
- `id`: Primary key
- `symbol`: Coin symbol
- `timeframe`: Analysis period
- `trend`: Trend direction (Bullish/Bearish/Neutral)
- `support_level`, `resistance_level`: Price levels
- `prediction`: Text prediction
- `confidence`: Confidence score (0-1)
- `timestamp`: Analysis timestamp

### `user_queries` Table
- `id`: Primary key
- `query`: SQL query or search term
- `result_count`: Number of results
- `timestamp`: Query timestamp

## Configuration

Edit `config.py` to customize:

```python
# Data collection intervals
COLLECTION_INTERVALS = {
    "price_data": 300,     # 5 minutes
    "news_data": 1800,     # 30 minutes
    "sentiment_data": 1800 # 30 minutes
}

# Number of coins to track
TOP_COINS_LIMIT = 100

# Gradio settings
GRADIO_SERVER_PORT = 7860
AUTO_REFRESH_INTERVAL = 30  # seconds

# Cache settings
CACHE_TTL = 300  # 5 minutes
CACHE_MAX_SIZE = 1000

# Logging
LOG_LEVEL = "INFO"
LOG_FILE = "logs/crypto_aggregator.log"
```

## API Usage Examples

### Collect Data Manually
```python
from collectors import collect_price_data, collect_news_data

# Collect latest prices
success, count = collect_price_data()
print(f"Collected {count} prices")

# Collect news
count = collect_news_data()
print(f"Collected {count} articles")
```

### Query Database
```python
from database import get_database

db = get_database()

# Get latest prices
prices = db.get_latest_prices(limit=10)

# Get news by coin
news = db.get_news_by_coin("bitcoin", limit=5)

# Get top gainers
gainers = db.get_top_gainers(limit=10)
```

### AI Analysis
```python
from ai_models import analyze_sentiment, analyze_market_trend
from database import get_database

# Analyze sentiment
result = analyze_sentiment("Bitcoin hits new all-time high!")
print(result)  # {'label': 'positive', 'score': 0.95, 'confidence': 0.92}

# Analyze market trend
db = get_database()
history = db.get_price_history("bitcoin", hours=168)
analysis = analyze_market_trend(history)
print(analysis)  # {'trend': 'Bullish', 'support_level': 50000, ...}
```

## Error Handling & Resilience

### Fallback Mechanisms
- If CoinGecko fails → CoinCap is used
- If both APIs fail → cached database data is used
- If AI models fail to load → keyword-based sentiment analysis
- All network requests have timeout and retry logic

### Data Validation
- Price bounds checking (MIN_PRICE to MAX_PRICE)
- Volume and market cap validation
- Duplicate prevention (unique URLs for news)
- SQL injection prevention (read-only queries only)

### Logging
All operations are logged to `logs/crypto_aggregator.log`:
- Info: Successful operations, data collection
- Warning: API failures, retries
- Error: Database errors, critical failures

## Performance Optimization

- **Async/Await**: All network requests use aiohttp
- **Connection Pooling**: Reused HTTP connections
- **Caching**: In-memory cache with 5-minute TTL
- **Batch Inserts**: Minimum 100 records per database insert
- **Indexed Queries**: Database indexes on symbol, timestamp, sentiment
- **Lazy Loading**: AI models load only when first used

## Troubleshooting

### Issue: Models won't load
**Solution**: Ensure you have 4GB+ RAM. Models download on first run (2-3 min).

### Issue: No data appearing
**Solution**: Wait 5 minutes for initial data collection, or click "Refresh" buttons.

### Issue: Port 7860 already in use
**Solution**: Change `GRADIO_SERVER_PORT` in `config.py` or kill existing process.

### Issue: Database locked
**Solution**: Only one process can write at a time. Close other instances.

### Issue: RSS feeds failing
**Solution**: Some feeds may be temporarily down. Check Tab 6 for status.

## Development

### Running Tests
```bash
# Test data collection
python collectors.py

# Test AI models
python ai_models.py

# Test utilities
python utils.py

# Test database
python database.py
```

### Adding New Data Sources

Edit `collectors.py`:
```python
def collect_new_source():
    try:
        response = safe_api_call("https://api.example.com/data")
        # Parse and save data
        return True
    except Exception as e:
        logger.error(f"Error: {e}")
        return False
```

Add to scheduler in `collectors.py`:
```python
# In schedule_data_collection()
threading.Timer(interval, collect_new_source).start()
```

## Validation Checklist

- [x] All 8 files complete
- [x] No TODO or FIXME comments
- [x] No placeholder functions
- [x] All imports in requirements.txt
- [x] Database schema matches specification
- [x] All 6 Gradio tabs implemented
- [x] All 3 AI models integrated
- [x] All 5+ data sources configured
- [x] Error handling in every network call
- [x] Logging for all major operations
- [x] No API keys in code
- [x] Comments in English
- [x] PEP 8 compliant

## License

MIT License - Free to use, modify, and distribute.

## Support

For issues or questions:
- Check logs: `logs/crypto_aggregator.log`
- Review error messages in Tab 6
- Ensure all dependencies installed: `pip install -r requirements.txt`

## Credits

- **Data Sources**: CoinGecko, CoinCap, Binance, Alternative.me, CoinDesk, Cointelegraph, Reddit
- **AI Models**: HuggingFace (Cardiff NLP, ProsusAI, Facebook)
- **Framework**: Gradio

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**Made with ❤️ for the Crypto Community**