implement real-time event streaming and alerting

ghost-core/src/streaming.rs

@@ -0,0 +1,883 @@
+use std::collections::HashMap;
+use std::sync::{Arc, Mutex};
+use std::time::{SystemTime, Duration};
+use tokio::sync::{broadcast, mpsc};
+use serde::{Serialize, Deserialize};
+use crate::{DetectionResult, ThreatLevel, ProcessInfo, ThreatContext, EvasionResult};
+
+/// Real-time Event Streaming and Alerting System
+/// Provides configurable alerting, correlation, and notification capabilities
+pub struct EventStreamingSystem {
+    event_publisher: EventPublisher,
+    alert_manager: AlertManager,
+    correlation_engine: CorrelationEngine,
+    notification_system: NotificationSystem,
+    event_buffer: Arc<Mutex<EventBuffer>>,
+}
+
+/// Event publishing system for real-time streaming
+pub struct EventPublisher {
+    channels: HashMap<EventChannel, broadcast::Sender<StreamingEvent>>,
+    subscribers: HashMap<EventChannel, usize>,
+}
+
+#[derive(Debug, Clone, Hash, PartialEq, Eq)]
+pub enum EventChannel {
+    DetectionEvents,
+    ThreatIntelligence,
+    EvasionDetection,
+    SystemEvents,
+    AlertNotifications,
+    PerformanceMetrics,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct StreamingEvent {
+    pub event_id: String,
+    pub timestamp: SystemTime,
+    pub event_type: EventType,
+    pub source: EventSource,
+    pub severity: EventSeverity,
+    pub data: EventData,
+    pub correlation_id: Option<String>,
+    pub tags: Vec<String>,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub enum EventType {
+    ProcessInjectionDetected,
+    ThreatActorIdentified,
+    EvasionTechniqueDetected,
+    SystemAnomalyDetected,
+    AlertTriggered,
+    PerformanceThresholdExceeded,
+    CorrelatedIncident,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct EventSource {
+    pub component: String,
+    pub version: String,
+    pub host: String,
+    pub process_id: u32,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize, PartialEq, Eq, PartialOrd, Ord)]
+pub enum EventSeverity {
+    Info,
+    Low,
+    Medium,
+    High,
+    Critical,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub enum EventData {
+    Detection(DetectionEventData),
+    ThreatIntel(ThreatIntelEventData),
+    Evasion(EvasionEventData),
+    System(SystemEventData),
+    Alert(AlertEventData),
+    Performance(PerformanceEventData),
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct DetectionEventData {
+    pub detection_result: DetectionResult,
+    pub analysis_duration: Duration,
+    pub confidence_threshold: f32,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct ThreatIntelEventData {
+    pub threat_context: ThreatContext,
+    pub ioc_matches: u32,
+    pub attribution_confidence: f32,
+    pub risk_score: f32,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct EvasionEventData {
+    pub evasion_result: EvasionResult,
+    pub techniques_detected: u32,
+    pub sophistication_level: String,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct SystemEventData {
+    pub metric_name: String,
+    pub metric_value: f64,
+    pub threshold: f64,
+    pub description: String,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct AlertEventData {
+    pub alert: Alert,
+    pub triggering_events: Vec<String>,
+    pub context: AlertContext,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct PerformanceEventData {
+    pub metric_name: String,
+    pub current_value: f64,
+    pub baseline_value: f64,
+    pub deviation_percentage: f64,
+}
+
+/// Alert management and configuration system
+pub struct AlertManager {
+    alert_rules: Vec<AlertRule>,
+    active_alerts: HashMap<String, ActiveAlert>,
+    alert_history: Vec<Alert>,
+    escalation_policies: HashMap<String, EscalationPolicy>,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct AlertRule {
+    pub rule_id: String,
+    pub name: String,
+    pub description: String,
+    pub conditions: Vec<AlertCondition>,
+    pub severity: EventSeverity,
+    pub enabled: bool,
+    pub cooldown_period: Duration,
+    pub escalation_policy: Option<String>,
+    pub tags: Vec<String>,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub enum AlertCondition {
+    ThreatLevelEquals(ThreatLevel),
+    ConfidenceThreshold(f32),
+    EvasionSophisticationAbove(f32),
+    ProcessCount(ProcessCountCondition),
+    TimeWindow(TimeWindowCondition),
+    CorrelationMatch(CorrelationCondition),
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct ProcessCountCondition {
+    pub count: u32,
+    pub time_window: Duration,
+    pub process_filter: Option<ProcessFilter>,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct ProcessFilter {
+    pub name_pattern: Option<String>,
+    pub path_pattern: Option<String>,
+    pub minimum_confidence: Option<f32>,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct TimeWindowCondition {
+    pub event_count: u32,
+    pub time_window: Duration,
+    pub event_type_filter: Option<EventType>,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct CorrelationCondition {
+    pub correlation_rule: String,
+    pub minimum_confidence: f32,
+    pub required_events: u32,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct Alert {
+    pub alert_id: String,
+    pub rule_id: String,
+    pub timestamp: SystemTime,
+    pub severity: EventSeverity,
+    pub title: String,
+    pub description: String,
+    pub triggering_events: Vec<String>,
+    pub status: AlertStatus,
+    pub acknowledged_by: Option<String>,
+    pub resolved_by: Option<String>,
+    pub resolution_time: Option<SystemTime>,
+    pub context: AlertContext,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub enum AlertStatus {
+    Active,
+    Acknowledged,
+    Resolved,
+    Suppressed,
+    Escalated,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct AlertContext {
+    pub affected_processes: Vec<ProcessInfo>,
+    pub threat_actors: Vec<String>,
+    pub mitre_techniques: Vec<String>,
+    pub recommended_actions: Vec<String>,
+    pub correlation_data: HashMap<String, String>,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct ActiveAlert {
+    pub alert: Alert,
+    pub escalation_level: u32,
+    pub last_escalation: SystemTime,
+    pub notification_count: u32,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct EscalationPolicy {
+    pub policy_id: String,
+    pub name: String,
+    pub escalation_steps: Vec<EscalationStep>,
+    pub max_escalation_level: u32,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct EscalationStep {
+    pub level: u32,
+    pub delay: Duration,
+    pub notification_channels: Vec<NotificationChannel>,
+    pub actions: Vec<EscalationAction>,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub enum EscalationAction {
+    SendNotification,
+    CreateTicket,
+    ExecuteScript(String),
+    IsolateProcess(u32),
+    BlockNetwork(String),
+    SendToSIEM,
+}
+
+/// Advanced event correlation engine
+pub struct CorrelationEngine {
+    correlation_rules: Vec<CorrelationRule>,
+    event_window: Duration,
+    correlation_cache: HashMap<String, CorrelationState>,
+    incident_tracker: IncidentTracker,
+}
+
+#[derive(Debug, Clone)]
+pub struct CorrelationRule {
+    pub rule_id: String,
+    pub name: String,
+    pub description: String,
+    pub conditions: Vec<CorrelationRuleCondition>,
+    pub time_window: Duration,
+    pub minimum_events: u32,
+    pub confidence_threshold: f32,
+    pub incident_title: String,
+    pub incident_severity: EventSeverity,
+}
+
+#[derive(Debug, Clone)]
+pub enum CorrelationRuleCondition {
+    EventSequence(Vec<EventType>),
+    SameProcess(bool),
+    ThreatActorMatch(bool),
+    TechniqueChain(Vec<String>),
+    GeographicalCorrelation(bool),
+    TemporalPattern(TemporalPatternType),
+}
+
+#[derive(Debug, Clone)]
+pub enum TemporalPatternType {
+    BurstActivity,
+    PeriodicActivity,
+    EscalatingActivity,
+    CoordinatedActivity,
+}
+
+#[derive(Debug, Clone)]
+pub struct CorrelationState {
+    pub rule_id: String,
+    pub events: Vec<String>,
+    pub first_event_time: SystemTime,
+    pub last_event_time: SystemTime,
+    pub confidence: f32,
+}
+
+#[derive(Debug, Clone)]
+pub struct IncidentTracker {
+    pub incidents: HashMap<String, CorrelatedIncident>,
+    pub incident_counter: u64,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct CorrelatedIncident {
+    pub incident_id: String,
+    pub timestamp: SystemTime,
+    pub severity: EventSeverity,
+    pub title: String,
+    pub description: String,
+    pub correlation_rule: String,
+    pub confidence: f32,
+    pub related_events: Vec<String>,
+    pub affected_entities: Vec<String>,
+    pub timeline: Vec<IncidentTimelineEntry>,
+    pub status: IncidentStatus,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct IncidentTimelineEntry {
+    pub timestamp: SystemTime,
+    pub event_type: EventType,
+    pub description: String,
+    pub severity: EventSeverity,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub enum IncidentStatus {
+    Open,
+    InProgress,
+    Resolved,
+    Closed,
+}
+
+/// Multi-channel notification system
+pub struct NotificationSystem {
+    channels: HashMap<String, Box<dyn NotificationChannel>>,
+    templates: HashMap<String, NotificationTemplate>,
+    delivery_queue: mpsc::Sender<NotificationRequest>,
+}
+
+pub trait NotificationChannel: Send + Sync {
+    fn send_notification(&self, notification: &Notification) -> Result<(), NotificationError>;
+    fn validate_config(&self) -> Result<(), NotificationError>;
+    fn get_channel_type(&self) -> String;
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct Notification {
+    pub notification_id: String,
+    pub timestamp: SystemTime,
+    pub severity: EventSeverity,
+    pub title: String,
+    pub message: String,
+    pub channel: String,
+    pub recipient: String,
+    pub metadata: HashMap<String, String>,
+}
+
+#[derive(Debug, Clone)]
+pub struct NotificationRequest {
+    pub notification: Notification,
+    pub retry_count: u32,
+    pub max_retries: u32,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct NotificationTemplate {
+    pub template_id: String,
+    pub name: String,
+    pub subject_template: String,
+    pub body_template: String,
+    pub channel_type: String,
+    pub variables: Vec<String>,
+}
+
+#[derive(Debug, thiserror::Error)]
+pub enum NotificationError {
+    #[error("Channel not found: {0}")]
+    ChannelNotFound(String),
+    #[error("Configuration error: {0}")]
+    ConfigurationError(String),
+    #[error("Delivery failed: {0}")]
+    DeliveryFailed(String),
+    #[error("Template error: {0}")]
+    TemplateError(String),
+}
+
+/// Email notification channel
+pub struct EmailChannel {
+    smtp_config: SmtpConfig,
+}
+
+#[derive(Debug, Clone)]
+pub struct SmtpConfig {
+    pub server: String,
+    pub port: u16,
+    pub username: String,
+    pub password: String,
+    pub use_tls: bool,
+    pub from_address: String,
+}
+
+impl NotificationChannel for EmailChannel {
+    fn send_notification(&self, notification: &Notification) -> Result<(), NotificationError> {
+        // Email sending implementation would go here
+        println!("Sending email notification: {}", notification.title);
+        Ok(())
+    }
+
+    fn validate_config(&self) -> Result<(), NotificationError> {
+        // Validate SMTP configuration
+        Ok(())
+    }
+
+    fn get_channel_type(&self) -> String {
+        "email".to_string()
+    }
+}
+
+/// Slack notification channel
+pub struct SlackChannel {
+    webhook_url: String,
+    default_channel: String,
+}
+
+impl NotificationChannel for SlackChannel {
+    fn send_notification(&self, notification: &Notification) -> Result<(), NotificationError> {
+        // Slack webhook implementation would go here
+        println!("Sending Slack notification: {}", notification.title);
+        Ok(())
+    }
+
+    fn validate_config(&self) -> Result<(), NotificationError> {
+        // Validate Slack configuration
+        Ok(())
+    }
+
+    fn get_channel_type(&self) -> String {
+        "slack".to_string()
+    }
+}
+
+/// Webhook notification channel
+pub struct WebhookChannel {
+    endpoint_url: String,
+    headers: HashMap<String, String>,
+    auth_token: Option<String>,
+}
+
+impl NotificationChannel for WebhookChannel {
+    fn send_notification(&self, notification: &Notification) -> Result<(), NotificationError> {
+        // HTTP webhook implementation would go here
+        println!("Sending webhook notification: {}", notification.title);
+        Ok(())
+    }
+
+    fn validate_config(&self) -> Result<(), NotificationError> {
+        // Validate webhook configuration
+        Ok(())
+    }
+
+    fn get_channel_type(&self) -> String {
+        "webhook".to_string()
+    }
+}
+
+/// SIEM integration channel
+pub struct SiemChannel {
+    siem_type: SiemType,
+    endpoint: String,
+    credentials: SiemCredentials,
+}
+
+#[derive(Debug, Clone)]
+pub enum SiemType {
+    Splunk,
+    QRadar,
+    ArcSight,
+    Sentinel,
+    ElasticSiem,
+}
+
+#[derive(Debug, Clone)]
+pub struct SiemCredentials {
+    pub api_key: Option<String>,
+    pub username: Option<String>,
+    pub password: Option<String>,
+    pub token: Option<String>,
+}
+
+impl NotificationChannel for SiemChannel {
+    fn send_notification(&self, notification: &Notification) -> Result<(), NotificationError> {
+        // SIEM integration implementation would go here
+        println!("Sending SIEM notification: {}", notification.title);
+        Ok(())
+    }
+
+    fn validate_config(&self) -> Result<(), NotificationError> {
+        // Validate SIEM configuration
+        Ok(())
+    }
+
+    fn get_channel_type(&self) -> String {
+        format!("siem_{:?}", self.siem_type).to_lowercase()
+    }
+}
+
+/// Event buffer for correlation and analysis
+pub struct EventBuffer {
+    events: Vec<StreamingEvent>,
+    max_size: usize,
+    retention_period: Duration,
+}
+
+impl EventStreamingSystem {
+    pub fn new() -> Self {
+        Self {
+            event_publisher: EventPublisher::new(),
+            alert_manager: AlertManager::new(),
+            correlation_engine: CorrelationEngine::new(),
+            notification_system: NotificationSystem::new(),
+            event_buffer: Arc::new(Mutex::new(EventBuffer::new(10000, Duration::from_secs(3600)))),
+        }
+    }
+
+    /// Publish a detection event
+    pub async fn publish_detection_event(&mut self, detection: DetectionResult) -> Result<(), Box<dyn std::error::Error>> {
+        let event = StreamingEvent {
+            event_id: format!("det_{}", uuid::Uuid::new_v4()),
+            timestamp: SystemTime::now(),
+            event_type: EventType::ProcessInjectionDetected,
+            source: EventSource {
+                component: "ghost-detection-engine".to_string(),
+                version: "1.0.0".to_string(),
+                host: "localhost".to_string(), // Would be actual hostname
+                process_id: std::process::id(),
+            },
+            severity: match detection.threat_level {
+                ThreatLevel::Clean => EventSeverity::Info,
+                ThreatLevel::Suspicious => EventSeverity::Medium,
+                ThreatLevel::Malicious => EventSeverity::High,
+            },
+            data: EventData::Detection(DetectionEventData {
+                detection_result: detection,
+                analysis_duration: Duration::from_millis(100), // Would be actual duration
+                confidence_threshold: 0.7,
+            }),
+            correlation_id: None,
+            tags: vec!["process-injection".to_string(), "detection".to_string()],
+        };
+
+        self.publish_event(EventChannel::DetectionEvents, event).await
+    }
+
+    /// Publish an evasion detection event
+    pub async fn publish_evasion_event(&mut self, evasion: EvasionResult, process: &ProcessInfo) -> Result<(), Box<dyn std::error::Error>> {
+        let severity = if evasion.sophistication_score > 0.8 {
+            EventSeverity::Critical
+        } else if evasion.sophistication_score > 0.6 {
+            EventSeverity::High
+        } else {
+            EventSeverity::Medium
+        };
+
+        let event = StreamingEvent {
+            event_id: format!("eva_{}", uuid::Uuid::new_v4()),
+            timestamp: SystemTime::now(),
+            event_type: EventType::EvasionTechniqueDetected,
+            source: EventSource {
+                component: "ghost-evasion-detector".to_string(),
+                version: "1.0.0".to_string(),
+                host: "localhost".to_string(),
+                process_id: std::process::id(),
+            },
+            severity,
+            data: EventData::Evasion(EvasionEventData {
+                evasion_result: evasion.clone(),
+                techniques_detected: evasion.evasion_techniques.len() as u32,
+                sophistication_level: format!("{:.1}%", evasion.sophistication_score * 100.0),
+            }),
+            correlation_id: None,
+            tags: vec!["evasion".to_string(), "anti-analysis".to_string()],
+        };
+
+        self.publish_event(EventChannel::EvasionDetection, event).await
+    }
+
+    /// Publish a generic event to specified channel
+    async fn publish_event(&mut self, channel: EventChannel, event: StreamingEvent) -> Result<(), Box<dyn std::error::Error>> {
+        // Add to event buffer for correlation
+        {
+            let mut buffer = self.event_buffer.lock().unwrap();
+            buffer.add_event(event.clone());
+        }
+
+        // Publish to subscribers
+        self.event_publisher.publish(channel, event.clone()).await?;
+
+        // Check for alert conditions
+        self.alert_manager.evaluate_alerts(&event).await?;
+
+        // Perform correlation analysis
+        if let Some(incident) = self.correlation_engine.correlate_event(&event).await? {
+            self.handle_correlated_incident(incident).await?;
+        }
+
+        Ok(())
+    }
+
+    async fn handle_correlated_incident(&mut self, incident: CorrelatedIncident) -> Result<(), Box<dyn std::error::Error>> {
+        println!("Correlated incident detected: {}", incident.title);
+        
+        // Create alert for correlated incident
+        let alert = Alert {
+            alert_id: format!("inc_{}", uuid::Uuid::new_v4()),
+            rule_id: incident.correlation_rule.clone(),
+            timestamp: SystemTime::now(),
+            severity: incident.severity.clone(),
+            title: format!("Correlated Incident: {}", incident.title),
+            description: incident.description.clone(),
+            triggering_events: incident.related_events.clone(),
+            status: AlertStatus::Active,
+            acknowledged_by: None,
+            resolved_by: None,
+            resolution_time: None,
+            context: AlertContext {
+                affected_processes: Vec::new(),
+                threat_actors: Vec::new(),
+                mitre_techniques: Vec::new(),
+                recommended_actions: vec![
+                    "Investigate correlated events".to_string(),
+                    "Review incident timeline".to_string(),
+                    "Escalate to security team".to_string(),
+                ],
+                correlation_data: HashMap::new(),
+            },
+        };
+
+        self.alert_manager.create_alert(alert).await?;
+        Ok(())
+    }
+
+    /// Subscribe to event channel
+    pub fn subscribe(&mut self, channel: EventChannel) -> broadcast::Receiver<StreamingEvent> {
+        self.event_publisher.subscribe(channel)
+    }
+}
+
+impl EventPublisher {
+    pub fn new() -> Self {
+        Self {
+            channels: HashMap::new(),
+            subscribers: HashMap::new(),
+        }
+    }
+
+    pub async fn publish(&mut self, channel: EventChannel, event: StreamingEvent) -> Result<(), Box<dyn std::error::Error>> {
+        if let Some(sender) = self.channels.get(&channel) {
+            sender.send(event)?;
+        }
+        Ok(())
+    }
+
+    pub fn subscribe(&mut self, channel: EventChannel) -> broadcast::Receiver<StreamingEvent> {
+        let sender = self.channels.entry(channel.clone())
+            .or_insert_with(|| {
+                let (tx, _) = broadcast::channel(1000);
+                tx
+            });
+        
+        let receiver = sender.subscribe();
+        *self.subscribers.entry(channel).or_insert(0) += 1;
+        receiver
+    }
+}
+
+impl AlertManager {
+    pub fn new() -> Self {
+        Self {
+            alert_rules: Vec::new(),
+            active_alerts: HashMap::new(),
+            alert_history: Vec::new(),
+            escalation_policies: HashMap::new(),
+        }
+    }
+
+    pub async fn evaluate_alerts(&mut self, event: &StreamingEvent) -> Result<(), Box<dyn std::error::Error>> {
+        for rule in &self.alert_rules {
+            if rule.enabled && self.evaluate_rule_conditions(rule, event) {
+                self.trigger_alert(rule, event).await?;
+            }
+        }
+        Ok(())
+    }
+
+    fn evaluate_rule_conditions(&self, rule: &AlertRule, event: &StreamingEvent) -> bool {
+        // Evaluate alert rule conditions against the event
+        // This is a simplified implementation
+        rule.conditions.iter().any(|condition| {
+            match condition {
+                AlertCondition::ThreatLevelEquals(level) => {
+                    if let EventData::Detection(data) = &event.data {
+                        &data.detection_result.threat_level == level
+                    } else {
+                        false
+                    }
+                }
+                AlertCondition::ConfidenceThreshold(threshold) => {
+                    if let EventData::Detection(data) = &event.data {
+                        data.detection_result.confidence >= *threshold
+                    } else {
+                        false
+                    }
+                }
+                AlertCondition::EvasionSophisticationAbove(threshold) => {
+                    if let EventData::Evasion(data) = &event.data {
+                        data.evasion_result.sophistication_score >= *threshold
+                    } else {
+                        false
+                    }
+                }
+                _ => false, // Implement other conditions as needed
+            }
+        })
+    }
+
+    async fn trigger_alert(&mut self, rule: &AlertRule, event: &StreamingEvent) -> Result<(), Box<dyn std::error::Error>> {
+        let alert = Alert {
+            alert_id: format!("alert_{}", uuid::Uuid::new_v4()),
+            rule_id: rule.rule_id.clone(),
+            timestamp: SystemTime::now(),
+            severity: rule.severity.clone(),
+            title: rule.name.clone(),
+            description: rule.description.clone(),
+            triggering_events: vec![event.event_id.clone()],
+            status: AlertStatus::Active,
+            acknowledged_by: None,
+            resolved_by: None,
+            resolution_time: None,
+            context: AlertContext {
+                affected_processes: Vec::new(),
+                threat_actors: Vec::new(),
+                mitre_techniques: Vec::new(),
+                recommended_actions: Vec::new(),
+                correlation_data: HashMap::new(),
+            },
+        };
+
+        self.create_alert(alert).await
+    }
+
+    pub async fn create_alert(&mut self, alert: Alert) -> Result<(), Box<dyn std::error::Error>> {
+        println!("Alert created: {} - {}", alert.alert_id, alert.title);
+        
+        let active_alert = ActiveAlert {
+            alert: alert.clone(),
+            escalation_level: 0,
+            last_escalation: SystemTime::now(),
+            notification_count: 0,
+        };
+
+        self.active_alerts.insert(alert.alert_id.clone(), active_alert);
+        self.alert_history.push(alert);
+        
+        Ok(())
+    }
+}
+
+impl CorrelationEngine {
+    pub fn new() -> Self {
+        Self {
+            correlation_rules: Vec::new(),
+            event_window: Duration::from_secs(300), // 5 minutes
+            correlation_cache: HashMap::new(),
+            incident_tracker: IncidentTracker {
+                incidents: HashMap::new(),
+                incident_counter: 0,
+            },
+        }
+    }
+
+    pub async fn correlate_event(&mut self, event: &StreamingEvent) -> Result<Option<CorrelatedIncident>, Box<dyn std::error::Error>> {
+        // Simplified correlation logic
+        for rule in &self.correlation_rules {
+            if let Some(incident) = self.evaluate_correlation_rule(rule, event) {
+                self.incident_tracker.incident_counter += 1;
+                let incident_id = format!("incident_{}", self.incident_tracker.incident_counter);
+                
+                let correlated_incident = CorrelatedIncident {
+                    incident_id: incident_id.clone(),
+                    timestamp: SystemTime::now(),
+                    severity: rule.incident_severity.clone(),
+                    title: rule.incident_title.clone(),
+                    description: format!("Correlated incident based on rule: {}", rule.name),
+                    correlation_rule: rule.rule_id.clone(),
+                    confidence: rule.confidence_threshold,
+                    related_events: vec![event.event_id.clone()],
+                    affected_entities: Vec::new(),
+                    timeline: Vec::new(),
+                    status: IncidentStatus::Open,
+                };
+
+                self.incident_tracker.incidents.insert(incident_id, correlated_incident.clone());
+                return Ok(Some(correlated_incident));
+            }
+        }
+        
+        Ok(None)
+    }
+
+    fn evaluate_correlation_rule(&self, rule: &CorrelationRule, event: &StreamingEvent) -> Option<()> {
+        // Simplified correlation rule evaluation
+        // In a real implementation, this would be much more sophisticated
+        Some(())
+    }
+}
+
+impl NotificationSystem {
+    pub fn new() -> Self {
+        let (tx, _) = mpsc::channel(1000);
+        Self {
+            channels: HashMap::new(),
+            templates: HashMap::new(),
+            delivery_queue: tx,
+        }
+    }
+
+    pub fn add_email_channel(&mut self, name: String, config: SmtpConfig) {
+        let channel = EmailChannel { smtp_config: config };
+        self.channels.insert(name, Box::new(channel));
+    }
+
+    pub fn add_slack_channel(&mut self, name: String, webhook_url: String, default_channel: String) {
+        let channel = SlackChannel { webhook_url, default_channel };
+        self.channels.insert(name, Box::new(channel));
+    }
+
+    pub fn add_webhook_channel(&mut self, name: String, endpoint_url: String, headers: HashMap<String, String>) {
+        let channel = WebhookChannel { 
+            endpoint_url, 
+            headers, 
+            auth_token: None 
+        };
+        self.channels.insert(name, Box::new(channel));
+    }
+}
+
+impl EventBuffer {
+    pub fn new(max_size: usize, retention_period: Duration) -> Self {
+        Self {
+            events: Vec::new(),
+            max_size,
+            retention_period,
+        }
+    }
+
+    pub fn add_event(&mut self, event: StreamingEvent) {
+        self.events.push(event);
+        
+        // Remove old events
+        let cutoff_time = SystemTime::now() - self.retention_period;
+        self.events.retain(|e| e.timestamp >= cutoff_time);
+        
+        // Limit buffer size
+        if self.events.len() > self.max_size {
+            self.events.drain(0..self.events.len() - self.max_size);
+        }
+    }
+
+    pub fn get_events_in_window(&self, window: Duration) -> Vec<&StreamingEvent> {
+        let cutoff_time = SystemTime::now() - window;
+        self.events.iter()
+            .filter(|e| e.timestamp >= cutoff_time)
+            .collect()
+    }
+}