add middleware for aircox used for timezone and current station selection in admin; add page summary for today's diffusions menu in link title

aircox/models.py

@@ -167,6 +167,11 @@ class Station(Nameable):
         max_length = 256,
         blank = True,
     )
+    default = models.BooleanField(
+        _('default station'),
+        default = True,
+        help_text = _('if checked, this station is used as the main one')
+    )
 
     #
     # Controllers
@@ -333,6 +338,12 @@ class Station(Nameable):
                 self.slug
             )
 
+        if self.default:
+            qs = Station.objects.filter(default = True)
+            if self.pk:
+                qs = qs.exclude(pk = self.pk)
+            qs.update(default = False)
+
         super().save(*args, **kwargs)