implement database user password change

- implement userdbs.forms.ChangeDatabaseUserPasswordForm
- implement userdbs.views.ChangeDatabaseUserPassword
- add URL pattern 'change_dbuser_password' to userdbs.urls
- add template userdbs/databaseuser_setpassword.html
- link from hostingpackage detail template to 'change_dbuser_password'
- add changelog entry

gnuviechadmin/userdbs/forms.py

@@ -15,6 +15,7 @@ from crispy_forms.layout import (
 
 from .models import (
     DB_TYPES,
+    DatabaseUser,
     UserDatabase,
 )
 from gvawebcore.forms import PasswordModelFormMixin
@@ -64,3 +65,28 @@ class AddUserDatabaseForm(forms.ModelForm, PasswordModelFormMixin):
             data['db_type'], self.hosting_package.osuser,
             password=data['password1'], commit=commit)
         return super(AddUserDatabaseForm, self).save(commit)
+
+
+class ChangeDatabaseUserPasswordForm(forms.ModelForm, PasswordModelFormMixin):
+    """
+    This form is used to change the password of a database user.
+
+    """
+    class Meta:
+        model = DatabaseUser
+        fields = []
+
+    def __init__(self, *args, **kwargs):
+        self.hosting_package = kwargs.pop('hostingpackage')
+        super(ChangeDatabaseUserPasswordForm, self).__init__(*args, **kwargs)
+        self.helper = FormHelper()
+        self.helper.form_action = reverse(
+            'change_dbuser_password', kwargs={
+                'slug': self.instance.name,
+                'package': self.hosting_package.id,
+            })
+        self.helper.add_input(Submit('submit', _('Set password')))
+
+    def save(self, commit=True):
+        self.instance.set_password(self.cleaned_data['password1'])
+        return super(ChangeDatabaseUserPasswordForm, self).save()

gnuviechadmin/userdbs/urls.py

@@ -8,10 +8,13 @@ from django.conf.urls import patterns, url
 
 from .views import (
     AddUserDatabase,
+    ChangeDatabaseUserPassword,
 )
 
 urlpatterns = patterns(
     '',
     url(r'^(?P<package>\d+)/create$',
         AddUserDatabase.as_view(), name='add_userdatabase'),
+    url(r'^(?P<package>\d+)/(?P<slug>[\w0-9]+)/setpassword',
+        ChangeDatabaseUserPassword.as_view(), name='change_dbuser_password'),
 )

gnuviechadmin/userdbs/views.py

@@ -8,6 +8,7 @@ from django.shortcuts import redirect
 from django.utils.translation import ugettext as _
 from django.views.generic.edit import (
     CreateView,
+    UpdateView,
 )
 from django.contrib import messages
 
@@ -16,9 +17,11 @@ from gvawebcore.views import HostingPackageAndCustomerMixin
 
 from .forms import (
     AddUserDatabaseForm,
+    ChangeDatabaseUserPasswordForm,
 )
 from .models import (
     DB_TYPES,
+    DatabaseUser,
     UserDatabase,
 )
 
@@ -62,3 +65,38 @@ class AddUserDatabase(
                   dbname=userdatabase.db_name, db_user=userdatabase.db_user)
         )
         return redirect(self.get_hosting_package())
+
+
+class ChangeDatabaseUserPassword(
+    HostingPackageAndCustomerMixin, StaffOrSelfLoginRequiredMixin, UpdateView
+):
+    """
+    This view is used to change a database user's password.
+
+    """
+    model = DatabaseUser
+    slug_field = 'name'
+    context_object_name = 'dbuser'
+    template_name_suffix = '_setpassword'
+    form_class = ChangeDatabaseUserPasswordForm
+
+    def get_form_kwargs(self):
+        kwargs = super(ChangeDatabaseUserPassword, self).get_form_kwargs()
+        kwargs['hostingpackage'] = self.get_hosting_package()
+        return kwargs
+
+    def get_context_data(self, **kwargs):
+        context = super(ChangeDatabaseUserPassword, self).get_context_data(
+            **kwargs)
+        context['hostingpackage'] = self.get_hosting_package()
+        context['customer'] = self.get_customer_object()
+        return context
+
+    def form_valid(self, form):
+        db_user = form.save()
+        messages.success(
+            self.request,
+            _('Successfully changed password of database user {dbuser}'
+              ).format(dbuser=db_user.name)
+        )
+        return redirect(self.get_hosting_package())