--
--  gcsd
--
--  gcsd the generic command sequencer daemon can be used to serialize
--  commands sent over various paralell communication channels to a
--  single command output. It can be seen as a multiplexer for any
--  kind of communication between a single resource and various clients
--  which want to submit commands to it or query information from it.
--  gcsd is written in C and Lua. The goal is to provide an easy to
--  understand high level API based on Lua which can be used to
--  implement the business logic of the so formed multiplexer daemon.
--
--
--  Copyright (C) 2009-2010 Markus Grueneis <gimpf@spreadspace.org>
--                          Christian Pointner <equinox@spreadspace.org>
--
--  This file is part of gcsd.
--
--  gcsd 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.
--
--  gcsd 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 gcsd. If not, see <http://www.gnu.org/licenses/>.
--

response_table = {}
response_table.regex_to_handler = {
   [".*\n"] = function(match) end
}

function response_table:register_handler_table(handler_table)
   if (type(handler_table) ~= "table") then
      error("response handler_table must be of type 'table'")
   end
   self.regex_to_handler = handler_table
   log.printf(log.DEBUG, "loaded new response handler table")
end

function response_table:dispatch(response_buffer)
   local init = 1
   repeat
      local had_match = false
      local regex = command_queue:get_expected_response()
      if regex then
         local match = string.match(response_buffer, "^" .. regex, init)
         if match then
            command_queue:command_completed(match)
            init = init + string.len(match)
         end
      end
      -- TODO: check if ooor's are allowed when there is an expected response
      for regex, handler in pairs(self.regex_to_handler) do
         local match = string.match(response_buffer, "^" .. regex, init)
         if match then
            handler(match)
            had_match = true
            init = init + string.len(match)
            break
         end
      end
   until (not had_match)

   return string.sub(response_buffer, init + 1)
end