allow mods to delete topics

apps/topics.lua

@@ -194,4 +194,20 @@ app:post("topic_edit", "/:slug/edit", function(self)
   return {redirect_to = self:url_for("topic", {slug = self.params.slug})}
 end)
 
+app:post("topic_delete", "/:slug/delete", function(self)
+  local user = util.get_logged_in_user(self)
+  if not user then
+    return {redirect_to = self:url_for("topic", {slug = self.params.slug})}
+  end
+  
+  if not user:is_mod() then
+    return {redirect_to = self:url_for("topic", {slug = self.params.slug})}
+  end
+  
+  local topic = Topics:find({slug = self.params.slug})
+  topic:delete()
+  util.inject_infobox(self, "Topic deleted.")
+  return {redirect_to = self:url_for("all_topics")}
+end)
+
 return app