only resend registration sms every 15 minutes

shiftregister/app/migrations/0002_logintoken_sent_at.py

@@ -0,0 +1,22 @@
+# Generated by Django 4.0.4 on 2022-04-20 17:01
+
+from django.db import migrations, models
+import django.utils.timezone
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("app", "0001_initial"),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name="logintoken",
+            name="sent_at",
+            field=models.DateTimeField(
+                auto_now_add=True, default=django.utils.timezone.now
+            ),
+            preserve_default=False,
+        ),
+    ]

shiftregister/app/migrations/0003_message_created_at.py

@@ -0,0 +1,22 @@
+# Generated by Django 4.0.4 on 2022-04-20 17:06
+
+from django.db import migrations, models
+import django.utils.timezone
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("app", "0002_logintoken_sent_at"),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name="message",
+            name="created_at",
+            field=models.DateTimeField(
+                auto_now_add=True, default=django.utils.timezone.now
+            ),
+            preserve_default=False,
+        ),
+    ]

shiftregister/app/models.py

@@ -41,9 +41,7 @@ class Helper(models.Model):
 
     def send_confirmation(self):
         (token, created) = LoginToken.objects.get_or_create(helper=self)
-        text = f"Hallo {self.name}, hier ist dein Registrierungslink zum Kontaktfestival http://short.url{token.get_absolute_url()}"
-        msg = Message(to=self, text=text)
-        msg.save()
+        token.send()
         return token
 
     # current or next shift
@@ -79,9 +77,10 @@ class Message(models.Model):
     # remove limit and send long messages in multiple messages?
     text = models.CharField(max_length=160)
     to = models.ForeignKey(Helper, on_delete=models.CASCADE)
+    created_at = models.DateTimeField(auto_now_add=True)
 
     def __str__(self):
-        return f"{self.to.name}: {self.text}"
+        return f"{self.to.name}({self.created_at}): {self.text}"
 
 
 def gen_token():
@@ -93,6 +92,14 @@ class LoginToken(models.Model):
         max_length=20, primary_key=True, default=gen_token, editable=False
     )
     helper = models.ForeignKey(Helper, on_delete=models.CASCADE)
+    sent_at = models.DateTimeField(auto_now_add=True)
+
+    def send(self):
+        text = f"Hallo {self.helper.name}, hier ist dein Registrierungslink zum Kontaktfestival http://short.url{self.get_absolute_url()}"
+        msg = Message(to=self.helper, text=text)
+        msg.save()
+        self.sent_at = timezone.now()
+        self.save()
 
     def get_absolute_url(self):
         return reverse("token_login", kwargs={"token": self.id})

shiftregister/app/views.py

@@ -6,6 +6,7 @@ from django.db.models.fields import DateTimeField
 from django.utils import timezone
 from django.conf import settings
 from django.contrib import messages
+import datetime
 
 
 def index(request):
@@ -87,6 +88,23 @@ def register(request):
         if not form.is_valid():
             context["form"] = form
             return render(request, "register.html", context)
+        helper = Helper.objects.filter(pk=form.cleaned_data["phone"]).first()
+        if helper:
+            token = helper.logintoken_set.first()
+            # todo: resend login link after x minutes?
+            messages.add_message(
+                request,
+                messages.INFO,
+                f"Du hast einen Login-Link an deine Telefonnummer erhalten. Falls du die SMS nicht erhalten hast, probiere es in 15 Minuten noch ein mal.",
+            )
+            messages.add_message(
+                request,
+                messages.INFO,
+                f"DEBUG:{token.get_absolute_url()}",
+            )
+            if token.sent_at < (timezone.now() - datetime.timedelta(minutes=10)):
+                token.send()
+            return render(request, "register.html", context)
 
         helper = Helper(
             name=form.cleaned_data["name"], phone=form.cleaned_data["phone"]