--
--  rhnop
--
--  Copyright (C) 2011 Christian Pointner <equinox@helsinki.at>
--
--  This file is part of rhnop.
--
--  rhnop is free software: you can redistribute it and/or modify
--  it under the terms of the GNU General Public License as published by
--  the Free Software Foundation, either version 3 of the License, or
--  any later version.
--
--  rhnop is distributed in the hope that it will be useful,
--  but WITHOUT ANY WARRANTY; without even the implied warranty of
--  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
--  GNU General Public License for more details.
--
--  You should have received a copy of the GNU General Public License
--  along with rhnop. If not, see <http://www.gnu.org/licenses/>.
--

local queue_name = "/rhnop"

mq = require "luamq"
db = require "db"

function main_loop()
   local q, err = mq.create(queue_name, "ro")
   if q == nil then
      io.stderr:write("creation of message queue failed: " .. err .. "\n")
      os.exit(1)
   end
   
   local ret, err = db:init()
   if ret == nil then
      io.stderr:write("creation of db failed: " .. err .. "\n")
      os.exit(1)
   end

   while true do
      local msg, prio = mq.receive(q)
      if msg == nil then
         io.stderr:write("recv error: " .. prio .. "\n")
         os.exit(2)
      end
      
      local timestamp, nowcart, nowlen, nextcart, nextlen = string.match(msg, "^(%d+) (%d+) (%d+) (%d+) (%d+)$");
      if not timestamp or not nowcart or not nowlen or not nextcart or not nextlen then
         io.stderr:write("ignoring malformed message\n")
      else
         -- TODO: lookup info in Rivendell DB and insert into temporary storage
         print("received message:\ntimestamp = " .. timestamp .. "\nnowcart = "  .. nowcart .. "\nnowlen = " .. nowlen .. "\nnextcart = " .. nextcart .. "\nnextlen = " .. nextlen)
         pipe.signal()
      end
   end
end