local cvar = CreateConVar("allow_attack", "1")
local once

local blacklist =
{
    "weapon_crowbar",
}

local function Allow(bool)
    for key, ply in pairs(player.GetAll()) do
        for key, wep in pairs(ply:GetWeapons()) do
            if table.HasValue(blacklist, wep:GetClass()) then
                local t = bool and CurTime() or CurTime() + 10

                wep:SetNextPrimaryFire(t)
                wep:SetNextSecondaryFire(t)
            end
        end
    end
end

timer.Create("allow_attack", 0, 0, function()
    local A = cvar:GetBool()

    if A then
        if not once then
            Allow(true)
            once = true
        end
    else
        Allow(false)
        once = nil
    end
end)