Forum: Fix custom pagination.

app/models/forum_post.rb

@@ -194,7 +194,7 @@ def quoted_response
   end
 
   def forum_topic_page
-    (ForumPost.where("topic_id = ? and created_at <= ?", topic_id, created_at).count / Danbooru.config.posts_per_page.to_f).ceil
+    (ForumPost.where("topic_id = ? and created_at <= ?", topic_id, created_at).count / CurrentUser.user.per_page.to_f).ceil
   end
 
   def is_original_post?(original_post_id = nil)

app/models/forum_topic.rb

@@ -190,11 +190,11 @@ def create_mod_action_for_undelete
   end
 
   def page_for(post_id)
-    (forum_posts.where("id < ?", post_id).count / Danbooru.config.posts_per_page.to_f).ceil
+    (forum_posts.where("id < ?", post_id).count / CurrentUser.user.per_page.to_f).ceil
   end
 
   def last_page
-    (response_count / Danbooru.config.posts_per_page.to_f).ceil
+    (response_count / CurrentUser.user.per_page.to_f).ceil
   end
 
   # Delete all posts when the topic is deleted. Undelete all posts when the topic is undeleted.

app/views/forum_topics/_listing.html.erb

@@ -26,7 +26,7 @@
       <%= link_to topic.title, forum_topic_path(topic), class: "forum-post-link break-words" %>
     <% end %>
 
-    <% if topic.response_count > Danbooru.config.posts_per_page %>
+    <% if topic.response_count > CurrentUser.user.per_page %>
       <%= link_to "page #{topic.last_page}", forum_topic_path(topic, :page => topic.last_page), :class => "last-page" %>
     <% end %>
   <% end %>