local cooldowns = {};

function Player:SetLuaCooldown(seconds, opt_id)
    assert(type(self) == "userdata");
    seconds = assert(tonumber(seconds));
    opt_id = opt_id or 1;
    local guid, source = self:GetGUIDLow(), debug.getinfo(2, 'S').short_src;

    if (not cooldowns[guid]) then
        cooldowns[guid] = { [source] = {}; };
    end

    cooldowns[guid][source][opt_id] = os.clock() + seconds;
end

function Player:GetLuaCooldown(opt_id)
    assert(type(self) == "userdata");
    local guid, source = self:GetGUIDLow(), debug.getinfo(2, 'S').short_src;
    opt_id = opt_id or 1;

    if (not cooldowns[guid]) then
        cooldowns[guid] = { [source] = {}; };
    end

    local cd = cooldowns[guid][source][opt_id];
    if (not cd or cd < os.clock()) then
        cooldowns[guid][source][opt_id] = 0
        return 0;
    else
        return cooldowns[guid][source][opt_id] - os.clock();
    end
end