local mainlog = log;

local function log(type, message)

	mainlog(type, "rostermanager", message);

end

local setmetatable = setmetatable;

local format = string.format;

local loadfile, setfenv, pcall = loadfile, setfenv, pcall;

local hosts = hosts;

require "util.datamanager"

local datamanager = datamanager;

local st = require "util.stanza";

module "rostermanager"

--[[function getroster(username, host)

	return { 

			["mattj@localhost"] = true,

			["tobias@getjabber.ath.cx"] = true,

			["waqas@getjabber.ath.cx"] = true,

			["thorns@getjabber.ath.cx"] = true, 

			["idw@getjabber.ath.cx"] = true, 

		}

	--return datamanager.load(username, host, "roster") or {};

end]]

function add_to_roster(session, jid, item)

	if session.roster then

		local old_item = session.roster[jid];

		session.roster[jid] = item;

		if save_roster(session.username, session.host) then

			return true;

		else

			session.roster[jid] = old_item;

			return nil, "wait", "internal-server-error", "Unable to save roster";

		end

	else

		return nil, "auth", "not-authorized", "Session's roster not loaded";

	end

end

function remove_from_roster(session, jid)

	if session.roster then

		local old_item = session.roster[jid];

		session.roster[jid] = nil;

		if save_roster(session.username, session.host) then

			return true;

		else

			session.roster[jid] = old_item;

			return nil, "wait", "internal-server-error", "Unable to save roster";

		end

	else

		return nil, "auth", "not-authorized", "Session's roster not loaded";

	end

end

function roster_push(username, host, jid)

	if hosts[host] and hosts[host].sessions[username] and hosts[host].sessions[username].roster then

		local item = hosts[host].sessions[username].roster[jid];

		local stanza = st.iq({type="set"});

		stanza:tag("query", {xmlns = "jabber:iq:roster"});

		if item then

			stanza:tag("item", {jid = jid, subscription = item.subscription, name = item.name});

		else

			stanza:tag("item", {jid = jid, subscription = "remove"});

		end

		stanza:up();

		stanza:up();

		-- stanza ready

			if session.full_jid then

				-- FIXME do we need to set stanza.attr.to?

			end

		end

	end

end

function load_roster(username, host)

	if hosts[host] and hosts[host].sessions[username] then

		local roster = hosts[host].sessions[username].roster;

		if not roster then

			roster = datamanager.load(username, host, "roster") or {};

			hosts[host].sessions[username].roster = roster;

		end

		return roster;

	end

	-- Attempt to load roster for non-loaded user

end

function save_roster(username, host)

	if hosts[host] and hosts[host].sessions[username] and hosts[host].sessions[username].roster then

	end

	return nil;

end

return _M;