-- Prosody IM v0.2

-- Copyright (C) 2008 Matthew Wild

-- Copyright (C) 2008 Waqas Hussain

-- 

--

local match = string.match;

local nodeprep = require "util.encodings".stringprep.nodeprep;

local nameprep = require "util.encodings".stringprep.nameprep;

local resourceprep = require "util.encodings".stringprep.resourceprep;

module "jid"

function split(jid)

	if not jid then return; end

	local node, nodepos = match(jid, "^([^@]+)@()");

	local host, hostpos = match(jid, "^([^@/]+)()", nodepos)

	if node and not host then return nil, nil, nil; end

	local resource = match(jid, "^/(.+)$", hostpos);

	if (not host) or ((not resource) and #jid >= hostpos) then return nil, nil, nil; end

	return node, host, resource;

end

function bare(jid)

	local node, host = split(jid);

	if node and host then

		return node.."@"..host;

	end

	return host;

end

function prepped_split(jid)

	local node, host, resource = split(jid);

	if host then

		host = nameprep(host);

		if not host then return; end

		if node then

			node = nodeprep(node);

			if not node then return; end

		end

		if resource then

			resource = resourceprep(resource);

			if not resource then return; end

		end

		return node, host, resource;

	end

end

function prep(jid)

	local node, host, resource = prepped_split(jid);

	if host then

		if node then

			host = node .. "@" .. host;

		end

		if resource then

			host = host .. "/" .. resource;

		end

	end

	return host;

end

return _M;