Add preliminary report system

The report system is pretty low-tech. However the scaffolding is there
for a lot of new stuff. What we currently have:

* Users can create reports
* Staff can view reports
* Admins can create report templates

There's a post drop-down menu available on all posts now, too. This is
where "report post" menu item lives and other things like that can be
added too.

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

board/views.py

@@ -3,11 +3,11 @@ from django.http import Http404, HttpResponseRedirect
 from django.shortcuts import render, get_object_or_404
 from django.views.generic import DetailView
 from django.views.generic.edit import CreateView
-from django.urls import reverse
-from board.models import Post, Board
-from board.forms import PostForm, ReplyForm
+from django.urls import reverse, reverse_lazy
+from board.models import Post, Board, Report
+from board.forms import PostForm, ReplyForm, ReportForm
 
-__all__ = ("BoardView", "PostView")
+__all__ = ("BoardView", "PostView", "ReportView")
 
 
 def get_client_ip(request):
@@ -107,3 +107,27 @@ class PostView(CreatePostView):
         kwargs["op"] = post
         kwargs["reply"] = post
         return kwargs
+
+
+class ReportView(CreatePostView):
+    model = Report
+    form_class = ReportForm
+    success_url = reverse_lazy("board:report_success")
+
+    def get_context_data(self, **kwargs):
+        return super(ReportView, self).get_context_data(**kwargs)
+
+    @property
+    def board_url(self) -> str:
+        return self.kwargs["url"]
+
+    @property
+    def post_id(self) -> int:
+        return self.kwargs["id"]
+
+    def get_form_kwargs(self):
+        kwargs = super(ReportView, self).get_form_kwargs()
+        post_id = self.kwargs["id"]
+        post = get_object_or_404(Post, id=post_id)
+        kwargs["op"] = post
+        return kwargs