-- Prosody IM

-- Copyright (C) 2008-2010 Matthew Wild

-- Copyright (C) 2008-2010 Waqas Hussain

-- 

-- This project is MIT/X11 licensed. Please see the

-- COPYING file in the source package for more information.

--

local listeners_dir = (CFG_SOURCEDIR or ".").."/net/";

local server = require "net.server";

local log = require "util.logger".init("connlisteners");

local tostring = tostring;

local type = type

local ipairs = ipairs

local dofile, xpcall, error =

      dofile, xpcall, error

local debug_traceback = debug.traceback;

module "connlisteners"

local listeners = {};

function register(name, listener)

	if listeners[name] and listeners[name] ~= listener then

		log("debug", "Listener %s is already registered, not registering any more", name);

		return false;

	end

	listeners[name] = listener;

	log("debug", "Registered connection listener %s", name);

	return true;

end

function deregister(name)

	listeners[name] = nil;

end

function get(name)

	local h = listeners[name];

	if not h then

		local ok, ret = xpcall(function() dofile(listeners_dir..name:gsub("[^%w%-]", "_").."_listener.lua") end, debug_traceback);

		if not ok then

			log("error", "Error while loading listener '%s': %s", tostring(name), tostring(ret));

			return nil, ret;

		end

		h = listeners[name];

	end

	return h;

end

function start(name, udata)

	local h, err = get(name);

	if not h then

		error("No such connection module: "..name.. (err and (" ("..err..")") or ""), 0);

	end

	local interfaces = (udata and udata.interface) or h.default_interface or "*";

	if type(interfaces) == "string" then interfaces = {interfaces}; end

	local port = (udata and udata.port) or h.default_port or error("Can't start listener "..name.." because no port was specified, and it has no default port", 0);

	local mode = (udata and udata.mode) or h.default_mode or 1;

	local ssl = (udata and udata.ssl) or nil;

	local autossl = udata and udata.type == "ssl";

	if autossl and not ssl then

		return nil, "no ssl context";

	end

	ok, err = true, {};

	for _, interface in ipairs(interfaces) do

		local handler

		handler, err[interface] = server.addserver(interface, port, h, mode, autossl and ssl or nil);

		ok = ok and handler;

	end

	return ok, err;

end

return _M;