add exponential registration backoff, change registration text

shiftregister/app/migrations/0003_logintoken_send_count.py

@@ -0,0 +1,18 @@
+# Generated by Django 4.0.4 on 2022-04-29 00:19
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("app", "0002_message_sent_at"),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name="logintoken",
+            name="send_count",
+            field=models.IntegerField(default=0),
+        ),
+    ]

shiftregister/app/models.py

@@ -115,12 +115,15 @@ class LoginToken(models.Model):
     )
     helper = models.ForeignKey(Helper, on_delete=models.CASCADE)
     sent_at = models.DateTimeField(auto_now_add=True)
+    send_count = models.IntegerField(default=0)
 
     def send(self):
-        text = f"Hallo {self.helper.name}, hier ist dein Registrierungslink zum Kontaktfestival http://short.url{self.get_absolute_url()}"
+        text = f"Dein Registrierungslink zum Helfer*inensystem: https://kontakt.rocks/{self.get_absolute_url()} \nWenn du dich nicht registiert hast, ignoriere diese SMS."
+        print("msglen", len(text))
         msg = Message(to=self.helper, text=text)
         msg.save()
         self.sent_at = timezone.now()
+        self.send_count += 1
         self.save()
         # import here to break import cycle
         from .tasks import send_message

shiftregister/app/urls.py

@@ -4,7 +4,7 @@ from . import views
 
 urlpatterns = [
     path("", views.index, name="index"),
-    path("login/<slug:token>", views.login, name="token_login"),
+    path("l/<slug:token>", views.login, name="token_login"),
     path("logout", views.logout, name="token_logout"),
     path("register", views.register, name="register"),
     path("shift/<int:shiftid>", views.shift, name="shift"),

shiftregister/app/views.py

@@ -10,6 +10,7 @@ from django.contrib import messages
 import datetime
 from .decorators import event_state
 from dynamic_preferences.registries import global_preferences_registry
+import math
 
 global_preferences = global_preferences_registry.manager()
 
@@ -118,7 +119,10 @@ def register(request):
                 messages.INFO,
                 f"DEBUG:{token.get_absolute_url()}",
             )
-            if token.sent_at < (timezone.now() - datetime.timedelta(minutes=10)):
+            if token.sent_at < (
+                timezone.now()
+                - datetime.timedelta(minutes=math.pow(10, token.send_count))
+            ):
                 token.send()
             return render(request, "register.html", context)