Fix #349 -- Allow to clone an event

src/pretix/control/views/main.py

@@ -9,7 +9,7 @@ from formtools.wizard.views import SessionWizardView
 
 from pretix.base.models import Event, EventPermission
 from pretix.control.forms.event import (
-    EventWizardBasicsForm, EventWizardFoundationForm,
+    EventWizardBasicsForm, EventWizardCopyForm, EventWizardFoundationForm,
 )
 
 
@@ -27,17 +27,25 @@ class EventList(ListView):
         )
 
 
+def condition_copy(wizard):
+    return EventPermission.objects.filter(
+        user=wizard.request.user, can_change_settings=True, can_change_items=True
+    ).exists()
+
+
 class EventWizard(SessionWizardView):
     form_list = [
         ('foundation', EventWizardFoundationForm),
         ('basics', EventWizardBasicsForm),
+        ('copy', EventWizardCopyForm),
     ]
     templates = {
         'foundation': 'pretixcontrol/events/create_foundation.html',
-        'basics': 'pretixcontrol/events/create_basics.html'
+        'basics': 'pretixcontrol/events/create_basics.html',
+        'copy': 'pretixcontrol/events/create_copy.html',
     }
     condition_dict = {
-
+        'copy': condition_copy
     }
 
     def get_form_kwargs(self, step=None):
@@ -55,6 +63,7 @@ class EventWizard(SessionWizardView):
     def done(self, form_list, form_dict, **kwargs):
         foundation_data = self.get_cleaned_data_for_step('foundation')
         basics_data = self.get_cleaned_data_for_step('basics')
+        copy_data = self.get_cleaned_data_for_step('copy')
 
         with transaction.atomic():
             event = form_dict['basics'].instance
@@ -63,10 +72,6 @@ class EventWizard(SessionWizardView):
             form_dict['basics'].save()
             EventPermission.objects.create(event=event, user=self.request.user)
 
-            event.settings.set('timezone', basics_data['timezone'])
-            event.settings.set('locale', basics_data['locale'])
-            event.settings.set('locales', foundation_data['locales'])
-
             logdata = {}
             for f in form_list:
                 logdata.update({
@@ -74,7 +79,16 @@ class EventWizard(SessionWizardView):
                 })
             event.log_action('pretix.event.settings', user=self.request.user, data=logdata)
 
-        messages.success(self.request, _('The new event has been created.'))
+            if copy_data and copy_data['copy_from_event']:
+                from_event = copy_data['copy_from_event']
+                event.copy_data_from(from_event)
+
+            event.settings.set('timezone', basics_data['timezone'])
+            event.settings.set('locale', basics_data['locale'])
+            event.settings.set('locales', foundation_data['locales'])
+
+        messages.success(self.request, _('The new event has been created. You can now adjust the event settings in '
+                                         'detail.'))
         return redirect(reverse('control:event.settings', kwargs={
             'organizer': event.organizer.slug,
             'event': event.slug,