move validate session to util module

util.lua

@@ -1,7 +1,9 @@
 local util = {}
 local magick = require("magick")
+local db = require("lapis.db")
 
 local Avatars = require("models").Avatars
+local Users = require("models").Users
 
 function util.get_user_avatar_url(req, user)
   if not user.avatar_id then
@@ -42,4 +44,17 @@ function util.validate_and_create_image(input_image, filename)
   return true
 end
 
+function util.get_logged_in_user(req)
+  if req.session.session_key == nil then
+    return nil
+  end
+
+  local session = db.select('* FROM "sessions" WHERE "key" = ? AND "expires_at" > "?" LIMIT 1', req.session.session_key, os.time())
+  if #session > 0 then
+    return Users:find({id = session[1].user_id})
+  end
+
+  return nil
+end
+
 return util