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Audit Logging Service - Compliance and security tracking.
Features:
- Action logging for compliance
- User activity tracking
- Security event monitoring
- HIPAA-compliant audit trails
"""
from typing import Dict, List, Optional
from datetime import datetime
from collections import deque
from enum import Enum
from loguru import logger
class AuditEventType(str, Enum):
"""Types of audit events"""
USER_LOGIN = "user_login"
USER_LOGOUT = "user_logout"
USER_REGISTER = "user_register"
QUERY_SUBMITTED = "query_submitted"
REPORT_UPLOADED = "report_uploaded"
REPORT_ACCESSED = "report_accessed"
DATA_EXPORTED = "data_exported"
SETTINGS_CHANGED = "settings_changed"
ALERT_TRIGGERED = "alert_triggered"
API_KEY_CREATED = "api_key_created"
API_KEY_REVOKED = "api_key_revoked"
PERMISSION_DENIED = "permission_denied"
SECURITY_VIOLATION = "security_violation"
class AuditService:
"""
Audit logging service for compliance and security.
Tracks all user actions and system events for:
- HIPAA compliance
- Security monitoring
- User activity tracking
- Forensic analysis
"""
def __init__(self, max_logs: int = 10000):
"""
Initialize audit service.
Args:
max_logs: Maximum number of logs to keep in memory
"""
self.logs: deque = deque(maxlen=max_logs)
self.max_logs = max_logs
logger.info(f"[AuditService] Initialized with max_logs={max_logs}")
def log_event(
self,
event_type: AuditEventType,
user_id: Optional[str] = None,
user_email: Optional[str] = None,
user_role: Optional[str] = None,
action: str = "",
resource: Optional[str] = None,
details: Optional[Dict] = None,
ip_address: Optional[str] = None,
success: bool = True,
error_message: Optional[str] = None
):
"""
Log an audit event.
Args:
event_type: Type of event
user_id: User ID performing action
user_email: User email
user_role: User role
action: Description of action
resource: Resource accessed/modified
details: Additional event details
ip_address: Client IP address
success: Whether action succeeded
error_message: Error message if failed
"""
event = {
"timestamp": datetime.now().isoformat(),
"event_type": event_type,
"user_id": user_id,
"user_email": user_email,
"user_role": user_role,
"action": action,
"resource": resource,
"details": details or {},
"ip_address": ip_address,
"success": success,
"error_message": error_message
}
self.logs.append(event)
# Log to file for persistence
log_level = "success" if success else "warning"
getattr(logger, log_level)(
f"[AuditLog] {event_type} | User: {user_email or 'anonymous'} | "
f"Action: {action} | Success: {success}"
)
def log_login(self, user_id: str, user_email: str, user_role: str, ip_address: Optional[str] = None):
"""Log user login"""
self.log_event(
event_type=AuditEventType.USER_LOGIN,
user_id=user_id,
user_email=user_email,
user_role=user_role,
action="User logged in",
ip_address=ip_address,
success=True
)
def log_query(
self,
user_id: Optional[str],
query: str,
query_type: str,
confidence: float,
session_id: str
):
"""Log query submission"""
self.log_event(
event_type=AuditEventType.QUERY_SUBMITTED,
user_id=user_id,
action=f"Query submitted: {query_type}",
resource=f"session:{session_id}",
details={
"query_preview": query[:100],
"query_type": query_type,
"confidence": confidence,
"query_length": len(query)
},
success=True
)
def log_report_upload(
self,
user_id: Optional[str],
filename: str,
file_size: int,
session_id: str
):
"""Log report upload"""
self.log_event(
event_type=AuditEventType.REPORT_UPLOADED,
user_id=user_id,
action=f"Report uploaded: {filename}",
resource=f"session:{session_id}",
details={
"filename": filename,
"file_size_bytes": file_size
},
success=True
)
def log_alert(
self,
user_id: Optional[str],
alert_type: str,
severity: str,
message: str
):
"""Log clinical alert"""
self.log_event(
event_type=AuditEventType.ALERT_TRIGGERED,
user_id=user_id,
action=f"Alert triggered: {alert_type}",
details={
"alert_type": alert_type,
"severity": severity,
"message": message
},
success=True
)
def log_permission_denied(
self,
user_id: Optional[str],
user_email: Optional[str],
user_role: Optional[str],
attempted_action: str,
required_role: str
):
"""Log permission denied"""
self.log_event(
event_type=AuditEventType.PERMISSION_DENIED,
user_id=user_id,
user_email=user_email,
user_role=user_role,
action=f"Permission denied: {attempted_action}",
details={
"attempted_action": attempted_action,
"required_role": required_role
},
success=False,
error_message=f"User role '{user_role}' insufficient for action requiring '{required_role}'"
)
def get_logs(
self,
user_id: Optional[str] = None,
event_type: Optional[AuditEventType] = None,
start_time: Optional[datetime] = None,
end_time: Optional[datetime] = None,
limit: int = 100
) -> List[Dict]:
"""
Retrieve audit logs with filters.
Args:
user_id: Filter by user ID
event_type: Filter by event type
start_time: Filter by start time
end_time: Filter by end time
limit: Maximum number of logs to return
Returns:
List of matching audit logs
"""
filtered_logs = list(self.logs)
# Apply filters
if user_id:
filtered_logs = [log for log in filtered_logs if log.get("user_id") == user_id]
if event_type:
filtered_logs = [log for log in filtered_logs if log.get("event_type") == event_type]
if start_time:
filtered_logs = [
log for log in filtered_logs
if datetime.fromisoformat(log["timestamp"]) >= start_time
]
if end_time:
filtered_logs = [
log for log in filtered_logs
if datetime.fromisoformat(log["timestamp"]) <= end_time
]
# Return most recent first
filtered_logs.reverse()
return filtered_logs[:limit]
def get_user_activity(self, user_id: str, limit: int = 50) -> List[Dict]:
"""Get recent activity for a user"""
return self.get_logs(user_id=user_id, limit=limit)
def get_security_events(self, limit: int = 100) -> List[Dict]:
"""Get recent security-related events"""
security_types = [
AuditEventType.PERMISSION_DENIED,
AuditEventType.SECURITY_VIOLATION,
AuditEventType.USER_LOGIN
]
security_logs = []
for log in reversed(list(self.logs)):
if log.get("event_type") in security_types:
security_logs.append(log)
if len(security_logs) >= limit:
break
return security_logs
def get_statistics(self) -> Dict:
"""Get audit log statistics"""
total_logs = len(self.logs)
# Count by event type
by_event_type = {}
for log in self.logs:
event_type = log.get("event_type")
by_event_type[event_type] = by_event_type.get(event_type, 0) + 1
# Count successes/failures
successes = sum(1 for log in self.logs if log.get("success"))
failures = total_logs - successes
# Count unique users
unique_users = len(set(log.get("user_id") for log in self.logs if log.get("user_id")))
# Recent activity (last hour)
one_hour_ago = datetime.now().timestamp() - 3600
recent_logs = [
log for log in self.logs
if datetime.fromisoformat(log["timestamp"]).timestamp() > one_hour_ago
]
return {
"total_logs": total_logs,
"by_event_type": by_event_type,
"success_count": successes,
"failure_count": failures,
"unique_users": unique_users,
"recent_activity_count": len(recent_logs),
"oldest_log": self.logs[0]["timestamp"] if self.logs else None,
"newest_log": self.logs[-1]["timestamp"] if self.logs else None
}
# Singleton instance
audit_service = AuditService()
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