misc: optimize generation of rdv url

reverse() and request.build_absolute_uri() are expensive, replace them
by staticaly generating URLs with a BASE_URL setting.

scripts/runuwsgi_settings.py

@@ -1,3 +1,4 @@
+BASE_URL = 'http://127.0.0.1:9040/'
 SECRET_KEY = '1234'
 LOGGING = {
     'version': 1,

src/ants_hub/api/views/ants.py

@@ -7,8 +7,10 @@ import logging
 import secrets
 import sys
 import time
+import urllib.parse
 import zoneinfo
 
+from django.conf import settings
 from django.http import JsonResponse
 from django.utils.text import slugify
 
@@ -155,6 +157,9 @@ def available_time_slots(request):
         'lieu__collectivite__pk',
         'lieu__collectivite__nom',
     )
+    base_url = getattr(settings, 'BASE_URL', None)
+    if not base_url:
+        base_callback_url = request.build_absolute_uri('/')
     for date, horaires, duree, lieu_pk, lieu_nom, collectivite_pk, collectivite_nom in qs:
         lieu_slug = slugify(lieu_nom)
         collectivite_slug = slugify(collectivite_nom)
@@ -167,7 +172,10 @@ def available_time_slots(request):
             collectivite_pk=collectivite_pk,
             collectivite_slug=collectivite_slug,
         ):
-            callback_url = request.build_absolute_uri(url)
+            if not base_url:
+                callback_url = urllib.parse.urljoin(base_callback_url, url)
+            else:
+                callback_url = base_url + url
             if date not in date_by_lieu[lieu_pk]:
                 # prevent the same datetime to be reported multiple times
                 date_by_lieu[lieu_pk].add(date)

src/ants_hub/data/models.py

@@ -324,17 +324,11 @@ def make_available_time_slots(date, horaires, duree, **kwargs):
             start += datetime.timedelta(minutes=duree)
 
 
+template_make_rdv_url = None
+
+
 def make_rdv_url(collectivite_pk, collectivite_slug, lieu_pk, lieu_slug, date):
-    return reverse(
+    return f'rdv/{collectivite_slug}-{collectivite_pk}/{lieu_slug}-{lieu_pk}/{date.isoformat()}/'
-        'rdv-redirect',
-        kwargs={
-            'collectivite_pk': collectivite_pk,
-            'collectivite_slug': collectivite_slug,
-            'lieu_pk': lieu_pk,
-            'lieu_slug': lieu_slug,
-            'date': date,
-        },
-    )
 
 
 class Plage(models.Model):