sort threads in topic by activity by default (bump) and add setting

apps/topics.lua

@@ -94,11 +94,15 @@ app:get("topic", "/:slug", function(self)
     topic_id = topic.id
   }))
   self.topic = topic
-
-  self.pages = math.max(math.ceil(threads_count / THREADS_PER_PAGE), 1)
-  self.page = math.max(1, math.min(tonumber(self.params.page) or 1, self.pages))
-  -- self.threads_list = db.query("SELECT * FROM threads WHERE topic_id = ? ORDER BY is_stickied DESC, created_at DESC", topic.id)
-  self.threads_list = db.query([[
+  local sort_by = self.session.sort_by or "activity"
+  local order_clause = ""
+  if sort_by == "thread" then
+    order_clause = "ORDER BY threads.is_stickied DESC, threads.created_at DESC"
+  else
+    order_clause = "ORDER BY threads.is_stickied DESC, latest_post_created_at DESC"
+  end
+  
+  local query = [[
     SELECT
       threads.title, threads.slug, threads.created_at, threads.is_locked, threads.is_stickied,
       users.username AS started_by,
@@ -126,11 +130,11 @@ app:get("topic", "/:slug", function(self)
       users u ON u.id = posts.user_id
     WHERE
       threads.topic_id = ?
-    ORDER BY
-      threads.is_stickied DESC,
-      threads.created_at DESC
-    LIMIT ? OFFSET ?
-  ]], topic.id, THREADS_PER_PAGE, (self.page - 1) * THREADS_PER_PAGE)
+  ]] .. order_clause .. " LIMIT ? OFFSET ?"
+  
+  self.pages = math.max(math.ceil(threads_count / THREADS_PER_PAGE), 1)
+  self.page = math.max(1, math.min(tonumber(self.params.page) or 1, self.pages))
+  self.threads_list = db.query(query, topic.id, THREADS_PER_PAGE, (self.page - 1) * THREADS_PER_PAGE)
   
   local user = util.get_logged_in_user_or_transient(self)
   self.me = user