implement hosting package option choice view

- implement new hostingpackages.views.HostingOptionChoices
- add URL pattern 'hosting_option_choices' to hostingpackages.urls
- add template hostingpackages/customerhostingpackage_option_choices.html
- link from hostingpackages/customerhostingpackage_detail.html to
  'hosting_package_choices'

gnuviechadmin/hostingpackages/urls.py

@@ -8,9 +8,10 @@ from django.conf.urls import patterns, url
 
 from .views import (
     AllCustomerHostingPackageList,
-    CreateHostingPackage,
     CreateCustomerHostingPackage,
+    CreateHostingPackage,
     CustomerHostingPackageDetails,
+    HostingOptionChoices,
 )
 
 
@@ -27,4 +28,7 @@ urlpatterns = patterns(
     url(r'^allpackages/',
         AllCustomerHostingPackageList.as_view(),
         name='all_hosting_packages'),
+    url(r'^(?P<pk>\d+)/option-choices$',
+        HostingOptionChoices.as_view(),
+        name='hosting_option_choices'),
 )

gnuviechadmin/hostingpackages/views.py

@@ -26,7 +26,12 @@ from .forms import (
     CreateCustomerHostingPackageForm,
     CreateHostingPackageForm,
 )
-from .models import CustomerHostingPackage
+from .models import (
+    CustomerHostingPackage,
+    DiskSpaceOption,
+    MailboxOption,
+    UserDatabaseOption,
+)
 
 
 class CreateHostingPackage(
@@ -111,3 +116,32 @@ class AllCustomerHostingPackageList(
 ):
     model = CustomerHostingPackage
     template_name_suffix = '_admin_list'
+
+
+class HostingOptionChoices(
+    LoginRequiredMixin, StaffuserRequiredMixin, DetailView
+):
+    """
+    This view displays choices of hosting options for a customer hosting
+    package.
+
+    """
+    model = CustomerHostingPackage
+    context_object_name = 'hostingpackage'
+    template_name_suffix = '_option_choices'
+
+    def get_context_data(self, **kwargs):
+        context = super(HostingOptionChoices, self).get_context_data(
+            **kwargs)
+        context.update({
+            'customer': self.get_object().customer,
+            'hosting_options': (
+                (_('Disk space'),
+                 DiskSpaceOption.objects.all()),
+                (_('Mailboxes'),
+                 MailboxOption.objects.all()),
+                (_('Databases'),
+                 UserDatabaseOption.objects.all())
+            ),
+        })
+        return context