Add user post wiping

If a user has spammed a lot of posts and made a mess of the board, this
will allow us to delete all posts by the offending user from the same
IP.

Signed-off-by: Alek Ratzloff <alekratz@gmail.com>

board/views.py

@@ -8,7 +8,7 @@ from django.http import Http404, HttpResponseRedirect
 from django.http.request import QueryDict
 from django.shortcuts import get_object_or_404
 from django.views.generic.base import TemplateView
-from django.views.generic import edit, list
+from django.views.generic import detail, edit, list
 from django.urls import reverse, reverse_lazy
 from django.utils import timezone
 
@@ -31,6 +31,7 @@ __all__ = (
     "PostView",
     "PostSuccessView",
     "PostDeleteView",
+    "PostWipeView",
     "ReplyCreateView",
     "ReportView",
 )
@@ -279,6 +280,38 @@ class PostDeleteView(PermissionRequiredMixin, edit.DeleteView):
         return HttpResponseRedirect(success_url)
 
 
+class PostWipeView(PermissionRequiredMixin, detail.SingleObjectMixin, TemplateView):
+    model = Post
+    permission_required = ("wipe_user",)
+    template_name = "board/post_wipe.html"
+    success_url = reverse_lazy("board:post_wipe_success")
+
+    @property
+    def all_posts(self):
+        return Post.objects.filter(ip=self.object.ip)
+
+    def dispatch(self, request, *args, **kwargs):
+        self.object = self.get_object()
+        return super(PostWipeView, self).dispatch(request, *args, **kwargs)
+
+    def post(self, request, *args, **kwargs):
+        # Wipe user's posts
+        self.all_posts.delete()
+        # Success redirect
+        success_url = self.get_success_url()
+        return HttpResponseRedirect(success_url)
+
+    def get_context_data(self, **kwargs):
+        context = super(PostWipeView, self).get_context_data(**kwargs)
+        # context["all_posts"] = self.all_posts
+        # for some reason, {{all_posts.count}} does not seem to work in the template.
+        context["all_posts_count"] = self.all_posts.count()
+        return context
+
+    def get_success_url(self):
+        return self.success_url
+
+
 class ReportView(CreateView):
     model = Report
     form_class = ReportForm