sorting.lua

for i, ply in ipairs(members) do
    ply.online = IsMemberOnline(ply.name)
    ply.playtime = ply.online and (ply.playtime + RefreshTime) or 0
    ply.offline_time = ply.online and 0 or (ply.offline_time + RefreshTime)
end

table.sort(members, function(ply1, ply2)
    if ply1.online and not ply2.online then
        return true
    end

    if ply1.online and ply2.online then
        return ply1.playtime > ply2.playtime
    else
        return ply1.offline_time > ply2.offline_time
    end

    return false
end)