add sorting topics view

apps/mod.lua

@@ -1,23 +1,46 @@
 local app = require("lapis").Application()
 
+local db = require("lapis.db")
+
 local util = require("util")
 
 local models = require("models")
 local Users = models.Users
 
-app:get("user_list", "/list", function(self)
+-- everything here requires a logged in moderator
+app:before_filter(function(self)
   self.me = util.get_logged_in_user(self)
   if not self.me then
-    return {redirect_to = self:url_for("all_topics")}
+    self:write{redirect_to = self:url_for("all_topics")}
+    return
   end
-  
+
   if not self.me:is_mod() then
-    return {redirect_to = self:url_for("all_topics")}
+    self:write{redirect_to = self:url_for("all_topics")}
+    return
   end
-  
+end)
+
+app:get("user_list", "/list", function(self)
   self.users = Users:select("")
-  
+
   return {render = "mod.user-list"}
 end)
 
+app:get("sort_topics", "/sort-topics", function(self)
+  self.topics = db.query("SELECT * FROM topics ORDER BY sort_order ASC")
+  self.page_title = "sorting topics"
+  return {render = "mod.sort-topics"}
+end)
+
+app:post("sort_topics", "/sort-topics", function(self)
+  local updates = self.params
+  db.query("BEGIN")
+  for topic_id, new_order in pairs(updates) do
+    db.update("topics", {sort_order = new_order}, {id = topic_id})
+  end
+  db.query("COMMIT")
+  return {redirect_to = self:url_for("sort_topics")}
+end)
+
 return app