Mass leave private threads.

misago/apps/privatethreads/list.py

@@ -3,7 +3,8 @@ from django.http import Http404
 from django.utils.translation import ugettext as _
 from misago.apps.threadtype.list import ThreadsListBaseView, ThreadsListModeration
 from misago.conf import settings
-from misago.models import Forum, Thread
+from misago import messages
+from misago.models import Forum, Thread, User
 from misago.readstrackers import ThreadsTracker
 from misago.utils.pagination import make_pagination
 from misago.apps.privatethreads.mixins import TypeMixin
@@ -37,3 +38,31 @@ class ThreadsListView(ThreadsListBaseView, ThreadsListModeration, TypeMixin):
         for thread in qs_threads[self.pagination['start']:self.pagination['stop']]:
             thread.is_read = tracker_forum.is_read(thread)
             self.threads.append(thread)
+
+    def threads_actions(self):
+        return (('leave', _("Leave threads")),)
+
+    def action_leave(self, ids):
+        left = 0
+        for thread in self.threads:
+            if thread.pk in ids:
+                try:
+                    user = thread.participants.get(id=self.request.user.pk)
+                    thread.participants.remove(user)
+                    thread.threadread_set.filter(id=user.pk).delete()
+                    thread.watchedthread_set.filter(id=user.pk).delete()
+                    user.sync_pds = True
+                    user.save(force_update=True)
+                    left +=1
+                    # If there are no more participants in thread, remove it
+                    if thread.participants.count() == 0:
+                        thread.delete()
+                    # Nope, see if we removed ourselves
+                    else:
+                        self.thread.set_checkpoint(self.request, 'left')
+                except User.DoesNotExist:
+                    pass
+        if left:
+            messages.success(self.request, _('You have left selected private threads.'), 'threads')
+        else:
+            messages.info(self.request, _('You have left no private threads.'), 'threads')