From ccc7053eb433b9367071446967f142aff69cb701 Mon Sep 17 00:00:00 2001
From: Nico Schottelius <nico@nico-notebook.schottelius.org>
Date: Sat, 5 Dec 2020 00:21:43 +0100
Subject: [PATCH] validate prefix

---
 ipv6ula/forms.py  |  2 ++
 ipv6ula/models.py | 20 +++++++++++++++-----
 ipv6ula/views.py  |  3 ++-
 3 files changed, 19 insertions(+), 6 deletions(-)

diff --git a/ipv6ula/forms.py b/ipv6ula/forms.py
index ebd3c1e..5be0447 100644
--- a/ipv6ula/forms.py
+++ b/ipv6ula/forms.py
@@ -10,3 +10,5 @@ class ULAForm(forms.ModelForm):
     def clean_prefix(self):
         prefix = self.cleaned_data['prefix']
         validate_ula_prefix(prefix)
+
+        return prefix
diff --git a/ipv6ula/models.py b/ipv6ula/models.py
index fb1f529..772985f 100644
--- a/ipv6ula/models.py
+++ b/ipv6ula/models.py
@@ -13,14 +13,24 @@ def validate_ula_prefix(prefix):
     net = ipaddress.IPv6Network(net_str, strict=False)
 
     if not net.subnet_of(ula_net):
-        print("raising error here")
-        v = ValidationError(
+        raise ValidationError(
             _(f"Prefix {prefix} is not within ULA range ({ula_net})"),
             code='invalid',
-            params = {'prefix': prefix }
+            params = {'prefix': net }
         )
-        print(v)
-        raise v
+
+
+    try:
+        ULA.objects.get(prefix=str(net[0]))
+    except ULA.DoesNotExist:
+        pass
+    else:
+        raise ValidationError(
+            _(f"Prefix {net} is already registered"),
+            code='invalid',
+            params = {'prefix': net }
+        )
+
 
 
 class User(AbstractUser):
diff --git a/ipv6ula/views.py b/ipv6ula/views.py
index 859e4e8..d4e874f 100644
--- a/ipv6ula/views.py
+++ b/ipv6ula/views.py
@@ -21,9 +21,10 @@ class IndexView(ListView):
 class SubmitView(LoginRequiredMixin, CreateView):
     model = ULA
 
+    form_class = ULAForm
     login_url = '/login/'
     success_url = '/'
-    form_class = ULAForm
+
 
     def form_valid(self, form):
         form.instance.owner = self.request.user