*(minor): small refactor

passbook/providers/app_gw/forms.py

@@ -0,0 +1,67 @@
+"""passbook Application Security Gateway Forms"""
+from urllib.parse import urlparse
+
+from django import forms
+from django.contrib.admin.widgets import FilteredSelectMultiple
+from django.forms import ValidationError
+from django.utils.translation import gettext as _
+
+from passbook.lib.fields import DynamicArrayField
+from passbook.providers.app_gw.models import (ApplicationGatewayProvider,
+                                              RewriteRule)
+
+
+class ApplicationGatewayProviderForm(forms.ModelForm):
+    """Security Gateway Provider form"""
+
+    def clean_server_name(self):
+        """Check if server_name is in DB already, since
+        Postgres ArrayField doesn't suppport keys."""
+        current = self.cleaned_data.get('server_name')
+        if ApplicationGatewayProvider.objects \
+                .filter(server_name__overlap=current) \
+                .exclude(pk=self.instance.pk).exists():
+            raise ValidationError(_("Server Name already in use."))
+        return current
+
+    def clean_upstream(self):
+        """Check that upstream begins with http(s)"""
+        for upstream in self.cleaned_data.get('upstream'):
+            _parsed_url = urlparse(upstream)
+
+            if _parsed_url.scheme not in ('http', 'https'):
+                raise ValidationError(_("URL Scheme must be either http or https"))
+        return self.cleaned_data.get('upstream')
+
+    class Meta:
+
+        model = ApplicationGatewayProvider
+        fields = ['server_name', 'upstream', 'enabled', 'authentication_header',
+                  'default_content_type', 'upstream_ssl_verification', 'property_mappings']
+        widgets = {
+            'authentication_header': forms.TextInput(),
+            'default_content_type': forms.TextInput(),
+            'property_mappings': FilteredSelectMultiple(_('Property Mappings'), False)
+        }
+        field_classes = {
+            'server_name': DynamicArrayField,
+            'upstream': DynamicArrayField
+        }
+        labels = {
+            'upstream_ssl_verification': _('Verify upstream SSL Certificates?'),
+            'property_mappings': _('Rewrite Rules')
+        }
+
+class RewriteRuleForm(forms.ModelForm):
+    """Rewrite Rule Form"""
+
+    class Meta:
+
+        model = RewriteRule
+        fields = ['name', 'match', 'halt', 'replacement', 'redirect', 'conditions']
+        widgets = {
+            'name': forms.TextInput(),
+            'match': forms.TextInput(attrs={'data-is-monospace': True}),
+            'replacement': forms.TextInput(attrs={'data-is-monospace': True}),
+            'conditions': FilteredSelectMultiple(_('Conditions'), False)
+        }