void Player::SendSpellHistory()
{
    uint64 curTime = 0;
    ACE_OS::gettimeofday().msec(curTime);
    uint64 infTime = curTime + infinityCooldownDelayCheck;

    WorldPacket data(SMSG_SEND_SPELL_HISTORY, (1 + 2 + 4 * m_spells.size() + 2 + m_spellCooldowns.size()*(2 + 2 + 2 + 4 + 4)));
    data.WriteBits(m_spellCooldowns.size(), 19);

    for (auto itr : m_spellCooldowns)
    {
        data.WriteBit(false); // unk bit, false in sniff
    }

    for (auto itr : m_spellCooldowns)
    {
        uint32 const spellId = itr.first;
        SpellCooldown const& cooldown = itr.second;

        SpellInfo const* proto = sSpellMgr->GetSpellInfo(spellId);
        if (!proto)
            continue;

        uint64 time = cooldown.end > curTime ? (cooldown.end - curTime) : 0;

        uint64 spellCooldown = proto->Category == 0 ? time : 0;
        uint64 categoryCooldown = proto->Category != 0 ? time : 0;

        if (cooldown.end >= infTime)
        {
            spellCooldown = 1;
            categoryCooldown = 0x80000000;
        }

        data << uint32(spellId);
        data << uint32(cooldown.itemid);
        data << uint32(proto->Category);
        data << uint32(spellCooldown);
        data << uint32(categoryCooldown);
    }

    GetSession()->SendPacket(&data);
}