add user page markup

apps/threads.lua

@@ -68,11 +68,23 @@ app:get("thread", "/:slug", function(self)
     return {status = 404}
   end
   self.thread = thread
+
+  if self.params.after then
+    local after_id = tonumber(self.params.after)
+    local post_position = Posts:count(db.clause({
+      thread_id = thread.id,
+      {"id <= ?", after_id},
+    }))
+    self.page = math.floor((post_position - 1) / POSTS_PER_PAGE) + 1
+  else
+    self.page = tonumber(self.params.page) or 1
+  end
+
   local post_count = Posts:count(db.clause({
     thread_id = thread.id
   }))
   self.pages = math.ceil(post_count / POSTS_PER_PAGE)
-  self.page = tonumber(self.params.page) or 1
+  -- self.page = math.max(1, math.min(self.page, self.pages))
   local posts = db.query([[
     SELECT
       posts.id, posts.created_at, post_history.content, post_history.edited_at, users.username, users.status, avatars.file_path AS avatar_path
@@ -93,9 +105,9 @@ app:get("thread", "/:slug", function(self)
   self.topic = Topics:find(thread.topic_id)
   self.me = util.get_logged_in_user_or_transient(self)
   self.posts = posts
-  
+
   self.page_title = thread.title
-  
+
   return {render = "threads.thread"}
 end)