Arch changes and feature flags

backend/app/services/feature_flag_service.py

@@ -0,0 +1,80 @@
+"""
+Feature Flag Service for managing application features
+"""
+import os
+from typing import Dict, List, Any
+from app.core.config import settings
+
+
+class FeatureFlagService:
+    """Service for managing feature flags"""
+    
+    def __init__(self):
+        """Initialize feature flags from environment variables"""
+        self._flags = self._load_flags_from_env()
+    
+    def _load_flags_from_env(self) -> Dict[str, Any]:
+        """Load feature flags from environment variables"""
+        # Get the FEATURE_FLAGS environment variable (comma-separated list)
+        feature_flags_env = os.getenv("FEATURE_FLAGS", "")
+        
+        # Default feature flags - these can be overridden by environment
+        default_flags = {
+            "CASH_PAYMENT_ENABLED": True,
+            "EMAIL_NOTIFICATIONS_ENABLED": True,
+            "EVENT_MANAGEMENT_ENABLED": True,
+            "AUTO_RENEWAL_ENABLED": False,
+            "MEMBERSHIP_TRANSFERS_ENABLED": False,
+            "BULK_OPERATIONS_ENABLED": False,
+            "ADVANCED_REPORTING_ENABLED": False,
+            "API_RATE_LIMITING_ENABLED": True,
+        }
+        
+        # Parse environment variable
+        flags = default_flags.copy()
+        
+        if feature_flags_env:
+            # Parse comma-separated key=value pairs
+            for flag_pair in feature_flags_env.split(","):
+                flag_pair = flag_pair.strip()
+                if "=" in flag_pair:
+                    key, value = flag_pair.split("=", 1)
+                    key = key.strip().upper()
+                    value = value.strip().lower()
+                    
+                    # Convert string to boolean
+                    if value in ("true", "1", "yes", "on"):
+                        flags[key] = True
+                    elif value in ("false", "0", "no", "off"):
+                        flags[key] = False
+                    else:
+                        # For non-boolean values, keep as string
+                        flags[key] = value
+        
+        return flags
+    
+    def is_enabled(self, flag_name: str) -> bool:
+        """Check if a feature flag is enabled"""
+        flag_name = flag_name.upper()
+        return bool(self._flags.get(flag_name, False))
+    
+    def get_flag_value(self, flag_name: str, default: Any = None) -> Any:
+        """Get the value of a feature flag"""
+        flag_name = flag_name.upper()
+        return self._flags.get(flag_name, default)
+    
+    def get_all_flags(self) -> Dict[str, Any]:
+        """Get all feature flags"""
+        return self._flags.copy()
+    
+    def get_enabled_flags(self) -> List[str]:
+        """Get list of enabled feature flag names"""
+        return [name for name, value in self._flags.items() if value is True]
+    
+    def reload_flags(self) -> None:
+        """Reload feature flags from environment (useful for runtime updates)"""
+        self._flags = self._load_flags_from_env()
+
+
+# Global instance
+feature_flags = FeatureFlagService()