Added websites validators

orchestra/apps/websites/validators.py

@@ -0,0 +1,30 @@
+from django.core.exceptions import ValidationError
+from django.db.models import Q
+from django.utils.translation import ugettext_lazy as _
+
+from .models import Website
+
+
+def validate_domain_protocol(website, domain, protocol):
+    if protocol == Website.HTTP:
+        qset = Q(
+            Q(protocol=Website.HTTP) |
+            Q(protocol=Website.HTTP_AND_HTTPS) |
+            Q(protocol=Website.HTTPS_ONLY)
+        )
+    elif protocol == Website.HTTPS:
+        qset = Q(
+            Q(protocol=Website.HTTPS) |
+            Q(protocol=Website.HTTP_AND_HTTPS) |
+            Q(protocol=Website.HTTPS_ONLY)
+        )
+    elif protocol in (Website.HTTP_AND_HTTPS, Website.HTTPS_ONLY):
+        qset = Q()
+    else:
+        raise ValidationError({
+            'protocol': _("Unknown protocol %s") % protocol
+        })
+    if domain.websites.filter(qset).exclude(pk=website.pk).exists():
+        raise ValidationError({
+            'domains': 'A website is already defined for "%s" on protocol %s' % (domain, protocol),
+        })