New alert service

services/alert_processor/app/enrichment/urgency_analyzer.py

@@ -0,0 +1,138 @@
+"""
+Urgency analyzer for alerts.
+
+Assesses time sensitivity, deadlines, and determines if action can wait.
+"""
+
+from typing import Dict, Any
+from datetime import datetime, timedelta, timezone
+import structlog
+
+logger = structlog.get_logger()
+
+
+class UrgencyAnalyzer:
+    """Analyze urgency from event metadata"""
+
+    def analyze(self, event_type: str, metadata: Dict[str, Any]) -> dict:
+        """
+        Analyze urgency for an event.
+
+        Returns dict with:
+        - hours_until_consequence: Time until impact occurs
+        - can_wait_until_tomorrow: Boolean
+        - deadline_utc: ISO datetime if deadline exists
+        - peak_hour_relevant: Boolean
+        - hours_pending: Age of alert
+        """
+
+        urgency = {
+            "hours_until_consequence": 24,  # Default: 24 hours
+            "can_wait_until_tomorrow": True,
+            "deadline_utc": None,
+            "peak_hour_relevant": False,
+            "hours_pending": 0
+        }
+
+        # Calculate based on event type
+        if "critical" in event_type or "urgent" in event_type:
+            urgency["hours_until_consequence"] = 2
+            urgency["can_wait_until_tomorrow"] = False
+
+        elif "production" in event_type:
+            urgency.update(self._analyze_production_urgency(metadata))
+
+        elif "stock" in event_type or "shortage" in event_type:
+            urgency.update(self._analyze_stock_urgency(metadata))
+
+        elif "delivery" in event_type or "overdue" in event_type:
+            urgency.update(self._analyze_delivery_urgency(metadata))
+
+        # Check for explicit deadlines
+        if "required_delivery_date" in metadata:
+            urgency.update(self._calculate_deadline_urgency(metadata["required_delivery_date"]))
+
+        if "production_date" in metadata:
+            urgency.update(self._calculate_deadline_urgency(metadata["production_date"]))
+
+        if "expected_date" in metadata:
+            urgency.update(self._calculate_deadline_urgency(metadata["expected_date"]))
+
+        return urgency
+
+    def _analyze_production_urgency(self, metadata: Dict[str, Any]) -> dict:
+        """Analyze urgency for production alerts"""
+        urgency = {}
+
+        delay_minutes = metadata.get("delay_minutes", 0)
+
+        if delay_minutes > 120:
+            urgency["hours_until_consequence"] = 1
+            urgency["can_wait_until_tomorrow"] = False
+        elif delay_minutes > 60:
+            urgency["hours_until_consequence"] = 4
+            urgency["can_wait_until_tomorrow"] = False
+        else:
+            urgency["hours_until_consequence"] = 8
+
+        # Production is peak-hour sensitive
+        urgency["peak_hour_relevant"] = True
+
+        return urgency
+
+    def _analyze_stock_urgency(self, metadata: Dict[str, Any]) -> dict:
+        """Analyze urgency for stock alerts"""
+        urgency = {}
+
+        # Hours until needed
+        if "hours_until" in metadata:
+            urgency["hours_until_consequence"] = metadata["hours_until"]
+            urgency["can_wait_until_tomorrow"] = urgency["hours_until_consequence"] > 24
+
+        # Days until expiry
+        elif "days_until_expiry" in metadata:
+            days = metadata["days_until_expiry"]
+            if days <= 1:
+                urgency["hours_until_consequence"] = days * 24
+                urgency["can_wait_until_tomorrow"] = False
+            else:
+                urgency["hours_until_consequence"] = days * 24
+
+        return urgency
+
+    def _analyze_delivery_urgency(self, metadata: Dict[str, Any]) -> dict:
+        """Analyze urgency for delivery alerts"""
+        urgency = {}
+
+        days_overdue = metadata.get("days_overdue", 0)
+
+        if days_overdue > 3:
+            urgency["hours_until_consequence"] = 2
+            urgency["can_wait_until_tomorrow"] = False
+        elif days_overdue > 1:
+            urgency["hours_until_consequence"] = 8
+            urgency["can_wait_until_tomorrow"] = False
+
+        return urgency
+
+    def _calculate_deadline_urgency(self, deadline_str: str) -> dict:
+        """Calculate urgency based on deadline"""
+        try:
+            if isinstance(deadline_str, str):
+                deadline = datetime.fromisoformat(deadline_str.replace('Z', '+00:00'))
+            else:
+                deadline = deadline_str
+
+            now = datetime.now(timezone.utc)
+            time_until = deadline - now
+
+            hours_until = time_until.total_seconds() / 3600
+
+            return {
+                "deadline_utc": deadline.isoformat(),
+                "hours_until_consequence": max(0, round(hours_until, 1)),
+                "can_wait_until_tomorrow": hours_until > 24
+            }
+        except Exception as e:
+            logger.warning("deadline_parse_failed", deadline=deadline_str, error=str(e))
+            return {}