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config/services/data_fetcher.py

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+import requests
+import logging
+from datetime import datetime, timezone
+from django.conf import settings
+
+logger = logging.getLogger(__name__)
+
+
+class CoinGeckoFetcher:
+    """Fetches Bitcoin data from CoinGecko API."""
+    
+    def __init__(self):
+        self.base_url = "https://api.coingecko.com/api/v3"
+        self.session = requests.Session()
+        self.session.headers.update({
+            'User-Agent': 'BitcoinMonitor/1.0',
+            'Accept': 'application/json',
+        })
+        
+        # Optional API key for higher rate limits
+        api_key = settings.BITCOIN_MONITOR.get('COINGECKO_API_KEY')
+        if api_key:
+            self.session.headers['x-cg-pro-api-key'] = api_key
+    
+    def fetch_current_price(self):
+        """Fetch current Bitcoin price."""
+        try:
+            url = f"{self.base_url}/simple/price"
+            params = {
+                'ids': 'bitcoin',
+                'vs_currencies': 'usd',
+                'include_market_cap': 'true',
+                'include_24hr_vol': 'true',
+                'include_last_updated_at': 'true',
+            }
+            
+            logger.debug(f"Fetching current price from {url}")
+            response = self.session.get(url, params=params, timeout=10)
+            response.raise_for_status()
+            
+            data = response.json()
+            
+            if 'bitcoin' not in data:
+                logger.error("Bitcoin data not found in response")
+                return None
+            
+            btc_data = data['bitcoin']
+            
+            return {
+                'timestamp': datetime.fromtimestamp(
+                    btc_data.get('last_updated_at', datetime.now(timezone.utc).timestamp()),
+                    timezone.utc
+                ),
+                'price_usd': btc_data['usd'],
+                'market_cap': btc_data.get('usd_market_cap'),
+                'volume': btc_data.get('usd_24h_vol'),
+            }
+            
+        except requests.exceptions.RequestException as e:
+            logger.error(f"Request error fetching current price: {e}")
+            return None
+        except Exception as e:
+            logger.error(f"Error fetching current price: {e}")
+            return None
+    
+    def fetch_price_history(self, days=30):
+        """Fetch historical price data (for future use)."""
+        try:
+            url = f"{self.base_url}/coins/bitcoin/market_chart"
+            params = {
+                'vs_currency': 'usd',
+                'days': days,
+                'interval': 'daily',
+            }
+            
+            logger.debug(f"Fetching {days} days of price history")
+            response = self.session.get(url, params=params, timeout=30)
+            response.raise_for_status()
+            
+            data = response.json()
+            
+            prices = []
+            for point in data.get('prices', []):
+                prices.append({
+                    'timestamp': datetime.fromtimestamp(point[0] / 1000, timezone.utc),
+                    'price': point[1],
+                })
+            
+            return {
+                'prices': prices,
+                'total_points': len(prices),
+            }
+            
+        except requests.exceptions.RequestException as e:
+            logger.error(f"Request error fetching price history: {e}")
+            return None
+        except Exception as e:
+            logger.error(f"Error fetching price history: {e}")
+            return None