--[[function getroster(username, host)

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

end]]

function add_to_roster(roster, jid, item)

	roster[jid] = item;

	-- TODO implement

end

function remove_from_roster(roster, jid)

	roster[jid] = nil;

	-- TODO implement

end

function load_roster(host, username)

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

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

		if not roster then

			return hosts[host].sessions[username].roster = datamanger.load(username, host, "roster") or {};

		end

		return roster;

	end

	error("Attempt to load roster for non-loaded user"); --return nil;

end

function save_roster(host, username)

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

		return datamanager.save(username, host, "roster", hosts[host].sessions[username].roster);

	end

	return nil;