First commit

emitter/banevents/tasks.py

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+"""Géolocalisation asynchrone des IP bannies (hors du chemin d'ingestion MQTT).
+
+Fallback API externe (ip-api.com, sans clé) tant qu'aucune base GeoLite2
+locale (MaxMind) n'est configurée — voir ROADMAP.md, Phase 2.a.
+"""
+import requests
+from celery import shared_task
+from django.utils import timezone
+
+from .models import BanEvent
+
+GEOLOCATION_API_URL = 'http://ip-api.com/json/{ip}'
+
+
+@shared_task(bind=True, max_retries=3, default_retry_delay=10)
+def geolocate_ip(self, ban_event_id: int) -> None:
+    try:
+        event = BanEvent.objects.get(pk=ban_event_id)
+    except BanEvent.DoesNotExist:
+        return
+
+    try:
+        response = requests.get(GEOLOCATION_API_URL.format(ip=event.ip_address), timeout=5)
+        response.raise_for_status()
+        data = response.json()
+    except requests.RequestException as e:
+        raise self.retry(exc=e)
+
+    if data.get('status') != 'success':
+        return
+
+    event.latitude = data.get('lat')
+    event.longitude = data.get('lon')
+    event.country = data.get('country', '')
+    event.country_code = data.get('countryCode', '')
+    event.city = data.get('city', '')
+    event.geolocated_at = timezone.now()
+    event.save(update_fields=[
+        'latitude', 'longitude', 'country', 'country_code', 'city', 'geolocated_at',
+    ])