void WorldSession::HandleReturnToSender(WorldPacket & recv_data)
{
    CHECK_PACKET_SIZE(recv_data,8+4);

    ObjectGuid mailboxGuid;
    uint32 mailId;
    recv_data >> mailboxGuid;
    recv_data >> mailId;
    recv_data.read_skip<uint64>();                          // original sender GUID for return to, not used

    if (!CheckMailBox(mailboxGuid))
        return;

    Player *pl = _player;
    Mail *m = pl->GetMail(mailId);
    if (!m || m->state == MAIL_STATE_DELETED || m->deliver_time > time(NULL))
    {
        pl->SendMailResult(mailId, MAIL_RETURNED_TO_SENDER, MAIL_ERR_INTERNAL_ERROR);
        return;
    }

    //we can return mail now
    //so firstly delete the old one
    RealmDataDatabase.BeginTransaction();
    RealmDataDatabase.PExecute("DELETE FROM mail WHERE id = '%u'", mailId);
                                                            // needed?
    RealmDataDatabase.PExecute("DELETE FROM mail_items WHERE mail_id = '%u'", mailId);
    RealmDataDatabase.CommitTransaction();
    pl->RemoveMail(mailId);

    // send back only to existing players and simple drop for other cases
    if (m->messageType == MAIL_NORMAL && m->sender)
    {
        MailDraft draft;
        if (m->mailTemplateId)
            draft.SetMailTemplate(m->mailTemplateId, false);// items already included
        else
            draft.SetSubjectAndBodyId(m->subject, m->itemTextId);

        if(m->HasItems())
        {
            for(MailItemInfoVec::iterator itr = m->items.begin(); itr != m->items.end(); ++itr)
            {
                if(Item *item = pl->GetMItem(itr->item_guid))
                    draft.AddItem(item);
                else
                {
                    //WTF?
                }

                pl->RemoveMItem(itr->item_guid);
            }
        }

        draft.SetMoney(m->money).SendReturnToSender(GetAccountId(), m->receiverGuid, ObjectGuid(HIGHGUID_PLAYER, m->sender));
    }

    delete m;                                               //we can deallocate old mail
    pl->SendMailResult(mailId, MAIL_RETURNED_TO_SENDER, MAIL_OK);
}

/**
 * Handles the Packet sent by the client when reading a mail.
 *
 * This method is called when a client reads a mail that was previously unread.
 * It will add the MAIL_CHECK_MASK_READ flag to the mail being read.
 *
 * @see MailCheckMask
 *
 * @param recv_data the packet containing information about the mail the player read.
 *
 */
void WorldSession::HandleMailMarkAsRead(WorldPacket & recv_data)
{
    ObjectGuid mailboxGuid;
    uint32 mailId;
    recv_data >> mailboxGuid;
    recv_data >> mailId;

    if (!CheckMailBox(mailboxGuid))
        return;

    MasterPlayer *pl = GetMasterPlayer();
    ASSERT(pl);

    if (Mail *m = pl->GetMail(mailId))
    {
        if (m->state == MAIL_STATE_DELETED)
        {
            ProcessAnticheatAction("MailCheck", "Attempt to mark deleted mail as read", CHEAT_ACTION_LOG);
            return;
        }
        pl->DecreaseUnreadMailsCount();
        m->checked = m->checked | MAIL_CHECK_MASK_READ;
        pl->MarkMailsUpdated();
        m->state = MAIL_STATE_CHANGED;
    }
}

/**
 * Handles the packet sent by the client when he copies the body a mail to his inventory.
 *
 * When a player copies the body of a mail to his inventory this method is called. It will create
 * a new item with the text of the mail and store it in the players inventory (if possible).
 *
 */
void WorldSession::HandleMailCreateTextItem(WorldPacket & recv_data)
{
    ObjectGuid mailboxGuid;
    uint32 mailId;

    recv_data >> mailboxGuid;
    recv_data >> mailId;
    recv_data.read_skip<uint32>();                          // mailTemplateId, non need, Mail store own 100% correct value anyway

    if (!CheckMailBox(mailboxGuid))
        return;

    ForwardPacketToMaster();
    MasterPlayer* pl = GetMasterPlayer();
    ASSERT(pl);
    Player* loadedPlayer = _player;

    Mail* m = pl->GetMail(mailId);
    if (!m || (!m->itemTextId && !m->mailTemplateId) || m->state == MAIL_STATE_DELETED || m->deliver_time > time(NULL) || m->checked & MAIL_CHECK_MASK_COPIED)
    {
        pl->SendMailResult(mailId, MAIL_MADE_PERMANENT, MAIL_ERR_INTERNAL_ERROR);
        return;
    }

    uint32 itemTextId = m->itemTextId;

    Item *bodyItem = new Item;                              // This is not bag and then can be used new Item.
    if (!bodyItem->Create(sObjectMgr.GenerateItemLowGuid(), MAIL_BODY_ITEM_TEMPLATE, pl->GetObjectGuid()))
    {
        delete bodyItem;
        return;
    }

    bodyItem->SetUInt32Value(ITEM_FIELD_ITEM_TEXT_ID, itemTextId);
    bodyItem->SetGuidValue(ITEM_FIELD_CREATOR, ObjectGuid(HIGHGUID_PLAYER, m->sender));

    DETAIL_LOG("HandleMailCreateTextItem mailid=%u", mailId);

    ItemPosCountVec dest;
    uint8 msg = _player->CanStoreItem(NULL_BAG, NULL_SLOT, dest, bodyItem, false);
    if (msg == EQUIP_ERR_OK)
    {
        m->checked = m->checked | MAIL_CHECK_MASK_COPIED;
        m->state = MAIL_STATE_CHANGED;
        pl->MarkMailsUpdated();

        loadedPlayer->StoreItem(dest, bodyItem, true);
        pl->SendMailResult(mailId, MAIL_MADE_PERMANENT, MAIL_OK);
    }
    else
    {
        pl->SendMailResult(mailId, MAIL_MADE_PERMANENT, MAIL_ERR_EQUIP_ERROR, msg);
        delete bodyItem;
    }
}

/**
 * Handles the Packet sent by the client when reading a mail.
 *
 * This method is called when a client reads a mail that was previously unread.
 * It will add the MAIL_CHECK_MASK_READ flag to the mail being read.
 *
 * @see MailCheckMask
 *
 * @param recv_data the packet containing information about the mail the player read.
 *
 */
void WorldSession::HandleMailMarkAsRead(WorldPacket& recv_data)
{
    ObjectGuid mailboxGuid;
    uint32 mailId;
    recv_data >> mailboxGuid;
    recv_data >> mailId;

    if (!CheckMailBox(mailboxGuid))
        return;

    Player* pl = _player;

    if (Mail* m = pl->GetMail(mailId))
    {
        if (pl->unReadMails)
            --pl->unReadMails;
        m->checked = m->checked | MAIL_CHECK_MASK_READ;
        pl->m_mailsUpdated = true;
        m->state = MAIL_STATE_CHANGED;
    }
}

/**
 * Handles the packet sent by the client when taking money from the mail.
 */
void WorldSession::HandleMailTakeMoney(WorldPacket & recv_data)
{
    ObjectGuid mailboxGuid;
    uint32 mailId;
    recv_data >> mailboxGuid;
    recv_data >> mailId;

    if (!CheckMailBox(mailboxGuid))
        return;

    ForwardPacketToMaster();

    MasterPlayer* pl = GetMasterPlayer();
    Player* loadedPlayer = GetPlayer();
    ASSERT(pl);

    Mail* m = pl->GetMail(mailId);
    if (!m || m->state == MAIL_STATE_DELETED || m->deliver_time > time(NULL))
    {
        pl->SendMailResult(mailId, MAIL_MONEY_TAKEN, MAIL_ERR_INTERNAL_ERROR);
        return;
    }

    pl->SendMailResult(mailId, MAIL_MONEY_TAKEN, MAIL_OK);

    loadedPlayer->LogModifyMoney(m->money, "Mail", ObjectGuid(HIGHGUID_PLAYER, m->sender));
    m->money = 0;
    m->state = MAIL_STATE_CHANGED;
    pl->MarkMailsUpdated();

    // save money and mail to prevent cheating
    CharacterDatabase.BeginTransaction();
    loadedPlayer->SaveGoldToDB();
    pl->SaveMails();
    CharacterDatabase.CommitTransaction();
}

/**
 * Handles the packet sent by the client when taking an item from the mail.
 */
void WorldSession::HandleMailTakeItem(WorldPacket& recv_data)
{
    ObjectGuid mailboxGuid;
    uint32 mailId;
    recv_data >> mailboxGuid;
    recv_data >> mailId;

    if (!CheckMailBox(mailboxGuid))
        return;

    Player* pl = _player;

    Mail* m = pl->GetMail(mailId);
    if (!m || m->state == MAIL_STATE_DELETED || m->deliver_time > time(NULL))
    {
        pl->SendMailResult(mailId, MAIL_ITEM_TAKEN, MAIL_ERR_INTERNAL_ERROR);
        return;
    }

    // prevent cheating with skip client money check
    if (pl->GetMoney() < m->COD)
    {
        pl->SendMailResult(mailId, MAIL_ITEM_TAKEN, MAIL_ERR_NOT_ENOUGH_MONEY);
        return;
    }

    uint32 itemId = m->items[0].item_template;
    uint32 itemGuid = m->items[0].item_guid;

    Item* it = pl->GetMItem(itemGuid);

    ItemPosCountVec dest;
    InventoryResult msg = _player->CanStoreItem(NULL_BAG, NULL_SLOT, dest, it, false);
    if (msg == EQUIP_ERR_OK)
    {
        m->RemoveItem(itemGuid);
        m->removedItems.push_back(itemGuid);

        if (m->COD > 0)                                     // if there is COD, take COD money from player and send them to sender by mail
        {
            ObjectGuid sender_guid = ObjectGuid(HIGHGUID_PLAYER, m->sender);
            Player* sender = sObjectMgr.GetPlayer(sender_guid);

            uint32 sender_accId = 0;

            if (GetSecurity() > SEC_PLAYER && sWorld.getConfig(CONFIG_BOOL_GM_LOG_TRADE))
            {
                std::string sender_name;
                if (sender)
                {
                    sender_accId = sender->GetSession()->GetAccountId();
                    sender_name = sender->GetName();
                }
                else if (sender_guid)
                {
                    // can be calculated early
                    sender_accId = sObjectMgr.GetPlayerAccountIdByGUID(sender_guid);

                    if (!sObjectMgr.GetPlayerNameByGUID(sender_guid, sender_name))
                        sender_name = sObjectMgr.GetMangosStringForDBCLocale(LANG_UNKNOWN);
                }
                sLog.outCommand(GetAccountId(), "GM %s (Account: %u) receive mail item: %s (Entry: %u Count: %u) and send COD money: %u to player: %s (Account: %u)",
                                GetPlayerName(), GetAccountId(), it->GetProto()->Name1, it->GetEntry(), it->GetCount(), m->COD, sender_name.c_str(), sender_accId);
            }
            else if (!sender)
                sender_accId = sObjectMgr.GetPlayerAccountIdByGUID(sender_guid);

            // check player existence
            if (sender || sender_accId)
            {
                MailDraft(m->subject)
                .SetMoney(m->COD)
                .SendMailTo(MailReceiver(sender, sender_guid), _player, MAIL_CHECK_MASK_COD_PAYMENT);
            }

            // pl->ModifyMoney(-int32(m->COD));
        }
        m->COD = 0;
        m->state = MAIL_STATE_CHANGED;
        pl->m_mailsUpdated = true;
        pl->RemoveMItem(it->GetGUIDLow());

        uint32 count = it->GetCount();                      // save counts before store and possible merge with deleting
        pl->MoveItemToInventory(dest, it, true);

        CharacterDatabase.BeginTransaction();
        pl->SaveInventoryAndGoldToDB();
        pl->_SaveMail();
        CharacterDatabase.CommitTransaction();

        pl->SendMailResult(mailId, MAIL_ITEM_TAKEN, MAIL_OK, 0, itemId, count);
    }
    else
        pl->SendMailResult(mailId, MAIL_ITEM_TAKEN, MAIL_ERR_EQUIP_ERROR, msg);
}

/**
 * Handles the packet sent by the client when he copies the body a mail to his inventory.
 *
 * When a player copies the body of a mail to his inventory this method is called. It will create
 * a new item with the text of the mail and store it in the players inventory (if possible).
 *
 */
void WorldSession::HandleMailCreateTextItem(WorldPacket& recv_data)
{
    ObjectGuid mailboxGuid;
    uint32 mailId;

    recv_data >> mailboxGuid;
    recv_data >> mailId;

    if (!CheckMailBox(mailboxGuid))
        return;

    Player* pl = _player;

    Mail* m = pl->GetMail(mailId);
    if (!m || (m->body.empty() && !m->mailTemplateId) || m->state == MAIL_STATE_DELETED || m->deliver_time > time(NULL))
    {
        pl->SendMailResult(mailId, MAIL_MADE_PERMANENT, MAIL_ERR_INTERNAL_ERROR);
        return;
    }

    Item* bodyItem = new Item;                              // This is not bag and then can be used new Item.
    if (!bodyItem->Create(sObjectMgr.GenerateItemLowGuid(), MAIL_BODY_ITEM_TEMPLATE, pl))
    {
        delete bodyItem;
        return;
    }

    // in mail template case we need create new item text
    if (m->mailTemplateId)
    {
        MailTemplateEntry const* mailTemplateEntry = sMailTemplateStore.LookupEntry(m->mailTemplateId);
        if (!mailTemplateEntry)
        {
            pl->SendMailResult(mailId, MAIL_MADE_PERMANENT, MAIL_ERR_INTERNAL_ERROR);
            return;
        }

        bodyItem->SetText(mailTemplateEntry->content[GetSessionDbcLocale()]);
    }
    else
        bodyItem->SetText(m->body);

    bodyItem->SetGuidValue(ITEM_FIELD_CREATOR, ObjectGuid(HIGHGUID_PLAYER, m->sender));
    bodyItem->SetFlag(ITEM_FIELD_FLAGS, ITEM_DYNFLAG_READABLE | ITEM_DYNFLAG_UNK15 | ITEM_DYNFLAG_UNK16);


    DETAIL_LOG("HandleMailCreateTextItem mailid=%u", mailId);

    ItemPosCountVec dest;
    InventoryResult msg = _player->CanStoreItem(NULL_BAG, NULL_SLOT, dest, bodyItem, false);
    if (msg == EQUIP_ERR_OK)
    {
        m->checked = m->checked | MAIL_CHECK_MASK_COPIED;
        m->state = MAIL_STATE_CHANGED;
        pl->m_mailsUpdated = true;

        pl->StoreItem(dest, bodyItem, true);
        pl->SendMailResult(mailId, MAIL_MADE_PERMANENT, MAIL_OK);
    }
    else
    {
        pl->SendMailResult(mailId, MAIL_MADE_PERMANENT, MAIL_ERR_EQUIP_ERROR, msg);
        delete bodyItem;
    }
}

/**
 * Handles the packet sent by the client when requesting the current mail list.
 * It will send a list of all available mails in the players mailbox to the client.
 */
void WorldSession::HandleGetMailList(WorldPacket& recv_data)
{
    ObjectGuid mailboxGuid;
    recv_data >> mailboxGuid;

    if (!CheckMailBox(mailboxGuid))
        return;

    // client can't work with packets > max int16 value
    const uint32 maxPacketSize = 32767;

    uint32 mailsCount = 0;                                  // send to client mails amount
    uint32 realCount = 0;                                   // real mails amount

    WorldPacket data(SMSG_MAIL_LIST_RESULT, 200);           // guess size
    data << uint32(0);                                      // real mail's count
    data << uint8(0);                                       // mail's count
    time_t cur_time = time(NULL);

    for (PlayerMails::iterator itr = _player->GetMailBegin(); itr != _player->GetMailEnd(); ++itr)
    {
        // packet send mail count as uint8, prevent overflow
        if (mailsCount >= 254)
        {
            realCount += 1;
            continue;
        }

        // skip deleted or not delivered (deliver delay not expired) mails
        if ((*itr)->state == MAIL_STATE_DELETED || cur_time < (*itr)->deliver_time)
            continue;

        uint8 item_count = (*itr)->items.size();            // max count is MAX_MAIL_ITEMS (12)

        size_t next_mail_size = 2 + 4 + 1 + ((*itr)->messageType == MAIL_NORMAL ? 8 : 4) + 4 * 8 + ((*itr)->subject.size() + 1) + ((*itr)->body.size() + 1) + 1 + item_count * (1 + 4 + 4 + 7 * 3 * 4 + 4 + 4 + 4 + 4 + 4 + 4 + 1);

        if (data.wpos() + next_mail_size > maxPacketSize)
        {
            realCount += 1;
            continue;
        }

        data << uint16(next_mail_size);                     // Message size
        data << uint32((*itr)->messageID);                  // Message ID
        data << uint8((*itr)->messageType);                 // Message Type

        switch ((*itr)->messageType)
        {
            case MAIL_NORMAL:                               // sender guid
                data << ObjectGuid(HIGHGUID_PLAYER, (*itr)->sender);
                break;
            case MAIL_CREATURE:
            case MAIL_GAMEOBJECT:
            case MAIL_AUCTION:
                data << uint32((*itr)->sender);             // creature/gameobject entry, auction id
                break;
            case MAIL_ITEM:                                 // item entry (?) sender = "Unknown", NYI
                data << uint32(0);                          // item entry
                break;
        }

        data << uint64((*itr)->COD);                        // COD
        data << uint32(0);                                  // unknown, probably changed in 3.3.3
        data << uint32((*itr)->stationery);                 // stationery (Stationery.dbc)
        data << uint64((*itr)->money);                      // copper
        data << uint32((*itr)->checked);                    // flags
        data << float(float((*itr)->expire_time - time(NULL)) / float(DAY));// Time
        data << uint32((*itr)->mailTemplateId);             // mail template (MailTemplate.dbc)
        data << (*itr)->subject;                            // Subject string - once 00, when mail type = 3, max 256
        data << (*itr)->body;                               // message? max 8000

        data << uint8(item_count);                          // client limit is 0x10

        for (uint8 i = 0; i < item_count; ++i)
        {
            Item* item = _player->GetMItem((*itr)->items[i].item_guid);
            // item index (0-6?)
            data << uint8(i);
            // item guid low?
            data << uint32(item ? item->GetGUIDLow() : 0);
            // entry
            data << uint32(item ? item->GetEntry() : 0);
            for (uint8 j = 0; j < MAX_INSPECTED_ENCHANTMENT_SLOT; ++j)
            {
                // unsure
                data << uint32(item ? item->GetEnchantmentCharges((EnchantmentSlot)j) : 0);
                // unsure
                data << uint32(item ? item->GetEnchantmentDuration((EnchantmentSlot)j) : 0);
                // unsure
                data << uint32(item ? item->GetEnchantmentId((EnchantmentSlot)j) : 0);
            }
            // can be negative
            data << uint32(item ? item->GetItemRandomPropertyId() : 0);
            // unk
            data << uint32(item ? item->GetItemSuffixFactor() : 0);
            // stack count
//.........这里部分代码省略.........

/**
 * Handles the Packet sent by the client when sending a mail.
 *
 * This methods takes the packet sent by the client and performs the following actions:
 * - Checks whether the mail is valid: i.e. can he send the selected items,
 *   does he have enough money, etc.
 * - Creates a MailDraft and adds the needed items, money, cost data.
 * - Sends the mail.
 *
 * Depending on the outcome of the checks performed the player will recieve a different
 * MailResponseResult.
 *
 * @see MailResponseResult
 * @see SendMailResult()
 *
 * @param recv_data the WorldPacket containing the data sent by the client.
 */
void WorldSession::HandleSendMail(WorldPacket& recv_data)
{
    sLog.outError("WORLD: CMSG_SEND_MAIL");
    ObjectGuid mailboxGuid;
    uint64 money, COD;
    std::string receiver, subject, body;
    uint8 receiverLen, subjectLen, bodyLen;
    uint32 unk1, unk2;

    recv_data >> unk1;                                      // stationery?
    recv_data >> unk2;                                      // 0x00000000

    recv_data >> money >> COD;                              // money and cod

    bodyLen = recv_data.ReadBits(12);
    subjectLen = recv_data.ReadBits(9);

    uint8 items_count = recv_data.ReadBits(5);              // attached items count
    if (items_count > MAX_MAIL_ITEMS)                       // client limit
    {
        GetPlayer()->SendMailResult(0, MAIL_SEND, MAIL_ERR_TOO_MANY_ATTACHMENTS);
        recv_data.rfinish();                                // set to end to avoid warnings spam
        return;
    }

    recv_data.ReadGuidMask<0>(mailboxGuid);

    ObjectGuid itemGuids[MAX_MAIL_ITEMS];
    for (uint8 i = 0; i < items_count; ++i)
        recv_data.ReadGuidMask<2, 6, 3, 7, 1, 0, 4, 5>(itemGuids[i]);

    recv_data.ReadGuidMask<3, 4>(mailboxGuid);

    receiverLen = recv_data.ReadBits(7);

    recv_data.ReadGuidMask<2, 6, 1, 7, 5>(mailboxGuid);

    recv_data.ReadGuidBytes<4>(mailboxGuid);

    for (uint8 i = 0; i < items_count; ++i)
    {
        recv_data.ReadGuidBytes<6, 1, 7, 2>(itemGuids[i]);
        recv_data.read_skip<uint8>();                       // item slot in mail, not used
        recv_data.ReadGuidBytes<3, 0, 4, 5>(itemGuids[i]);
    }

    recv_data.ReadGuidBytes<7, 3, 6, 5>(mailboxGuid);

    subject = recv_data.ReadString(subjectLen);
    receiver = recv_data.ReadString(receiverLen);

    recv_data.ReadGuidBytes<2, 0>(mailboxGuid);

    body = recv_data.ReadString(bodyLen);

    recv_data.ReadGuidBytes<1>(mailboxGuid);

    DEBUG_LOG("WORLD: CMSG_SEND_MAIL receiver '%s' subject '%s' body '%s' mailbox " UI64FMTD " money " UI64FMTD " COD " UI64FMTD " unkt1 %u unk2 %u",
        receiver.c_str(), subject.c_str(), body.c_str(), mailboxGuid.GetRawValue(), money, COD, unk1, unk2);
    // packet read complete, now do check

    if (!CheckMailBox(mailboxGuid))
        return;

    if (receiver.empty())
        return;

    Player* pl = _player;

    ObjectGuid rc;
    if (normalizePlayerName(receiver))
        rc = sAccountMgr.GetPlayerGuidByName(receiver);

    if (!rc)
    {
        DEBUG_LOG("%s is sending mail to %s (GUID: nonexistent!) with subject %s and body %s includes %u items, " UI64FMTD " copper and " UI64FMTD " COD copper with unk1 = %u, unk2 = %u",
                   pl->GetGuidStr().c_str(), receiver.c_str(), subject.c_str(), body.c_str(), items_count, money, COD, unk1, unk2);
        pl->SendMailResult(0, MAIL_SEND, MAIL_ERR_RECIPIENT_NOT_FOUND);
        return;
    }

    DEBUG_LOG("%s is sending mail to %s with subject %s and body %s includes %u items, %u copper and %u COD copper with unk1 = %u, unk2 = %u",
               pl->GetGuidStr().c_str(), rc.GetString().c_str(), subject.c_str(), body.c_str(), items_count, money, COD, unk1, unk2);
//.........这里部分代码省略.........

void WorldSession::HandleMailCreateTextItem(WorldPacket & recv_data)
{
    CHECK_PACKET_SIZE(recv_data,8+4);

    ObjectGuid mailboxGuid;
    uint32 mailId;

    recv_data >> mailboxGuid;
    recv_data >> mailId;
    recv_data.read_skip<uint32>();                          // mailTemplateId, non need, Mail store own 100% correct value anyway

    if (!CheckMailBox(mailboxGuid))
        return;

    Player *pl = _player;

    Mail* m = pl->GetMail(mailId);
    if (!m || (!m->itemTextId && !m->mailTemplateId) || m->state == MAIL_STATE_DELETED || m->deliver_time > time(NULL))
    {
        pl->SendMailResult(mailId, MAIL_MADE_PERMANENT, MAIL_ERR_INTERNAL_ERROR);
        return;
    }

    uint32 itemTextId = m->itemTextId;

    // in mail template case we need create new item text
    if(!itemTextId)
    {
        MailTemplateEntry const* mailTemplateEntry = sMailTemplateStore.LookupEntry(m->mailTemplateId);
        if (!mailTemplateEntry)
        {
            pl->SendMailResult(mailId, MAIL_MADE_PERMANENT, MAIL_ERR_INTERNAL_ERROR);
            return;
        }

        itemTextId = sObjectMgr.CreateItemText(mailTemplateEntry->content[GetSessionDbcLocale()]);
    }

    Item *bodyItem = new Item;                              // This is not bag and then can be used new Item.
    if (!bodyItem->Create(sObjectMgr.GenerateLowGuid(HIGHGUID_ITEM), MAIL_BODY_ITEM_TEMPLATE, pl))
    {
        delete bodyItem;
        return;
    }

    bodyItem->SetUInt32Value(ITEM_FIELD_ITEM_TEXT_ID , itemTextId);
    bodyItem->SetUInt32Value(ITEM_FIELD_CREATOR, m->sender);

    sLog.outDetail("HandleMailCreateTextItem mailid=%u",mailId);

    ItemPosCountVec dest;
    uint8 msg = _player->CanStoreItem(NULL_BAG, NULL_SLOT, dest, bodyItem, false);
    if (msg == EQUIP_ERR_OK)
    {
        m->checked = m->checked | MAIL_CHECK_MASK_COPIED;
        m->state = MAIL_STATE_CHANGED;
        pl->m_mailsUpdated = true;

        pl->StoreItem(dest, bodyItem, true);
        pl->SendMailResult(mailId, MAIL_MADE_PERMANENT, MAIL_OK);
    }
    else
    {
        pl->SendMailResult(mailId, MAIL_MADE_PERMANENT, MAIL_ERR_EQUIP_ERROR, msg);
        delete bodyItem;
    }
}

/**
 * Handles the Packet sent by the client when sending a mail.
 *
 * This methods takes the packet sent by the client and performs the following actions:
 * - Checks whether the mail is valid: i.e. can he send the selected items,
 *   does he have enough money, etc.
 * - Creates a MailDraft and adds the needed items, money, cost data.
 * - Sends the mail.
 *
 * Depending on the outcome of the checks performed the player will recieve a different
 * MailResponseResult.
 *
 * @see MailResponseResult
 * @see SendMailResult()
 *
 * @param recv_data the WorldPacket containing the data sent by the client.
 */
void WorldSession::HandleSendMail(WorldPacket & recv_data)
{
    ObjectGuid mailboxGuid;
    uint64 unk3;
    uint32 unk1, unk2;
    uint8 unk4;
    recv_data >> mailboxGuid;
    if (!CheckMailBox(mailboxGuid))
        return;

    ForwardPacketToMaster();

    WorldSession::AsyncMailSendRequest* req = new WorldSession::AsyncMailSendRequest();
    req->accountId = GetAccountId();
    req->senderGuid = GetMasterPlayer()->GetObjectGuid();
    recv_data >> req->receiverName;

    recv_data >> req->subject;

    recv_data >> req->body;

    recv_data >> unk1;                                      // stationery?
    recv_data >> unk2;                                      // 0x00000000

    recv_data >> req->itemGuid;

    recv_data >> req->money >> req->COD;                              // money and cod
    recv_data >> unk3;                                      // const 0
    recv_data >> unk4;                                      // const 0

    // packet read complete, now do check
    if (req->subject.size() > 64)
    {
        delete req;
        return;
    }

    if (req->body.size() > 500)
    {
        delete req;
        return;
    }

    if (req->COD && sWorld.getConfig(CONFIG_UINT32_COD_FORCE_TAG_MAX_LEVEL) &&
        sWorld.getConfig(CONFIG_UINT32_COD_FORCE_TAG_MAX_LEVEL) > GetAccountMaxLevel())
        req->subject = "(COD) " + req->subject;

    // Do not allow GMs to send money / items
    if (!sWorld.getConfig(CONFIG_BOOL_GM_ALLOW_TRADES) && GetSecurity() > SEC_PLAYER)
    {
        if (!req->itemGuid.IsEmpty() || req->money)
        {
            delete req;
            return;
        }
    }

    if (req->receiverName.empty())
    {
        delete req;
        return;
    }

    MasterPlayer* pl = GetMasterPlayer();

    if (normalizePlayerName(req->receiverName))
        req->receiver = sObjectMgr.GetPlayerGuidByName(req->receiverName);

    if (!req->receiver)
    {
        DETAIL_LOG("%s is sending mail to %s (GUID: nonexistent!) with subject %s and body %s includes %u items, %u copper and %u COD copper with unk1 = %u, unk2 = %u",
                   pl->GetGuidStr().c_str(), req->receiverName.c_str(), req->subject.c_str(), req->body.c_str(), req->itemGuid ? 1 : 0, req->money, req->COD, unk1, unk2);
        pl->SendMailResult(0, MAIL_SEND, MAIL_ERR_RECIPIENT_NOT_FOUND);
        delete req;
        return;
    }

    DETAIL_LOG("%s is sending mail to %s with subject %s and body %s includes %u items, %u copper and %u COD copper with unk1 = %u, unk2 = %u",
               pl->GetGuidStr().c_str(), req->receiverName.c_str(), req->subject.c_str(), req->body.c_str(), req->itemGuid ? 1 : 0, req->money, req->COD, unk1, unk2);

    if (pl->GetObjectGuid() == req->receiver)
    {
        pl->SendMailResult(0, MAIL_SEND, MAIL_ERR_CANNOT_SEND_TO_SELF);
//.........这里部分代码省略.........

/**
 * Handles the packet sent by the client when requesting the current mail list.
 * It will send a list of all available mails in the players mailbox to the client.
 */
void WorldSession::HandleGetMailList(WorldPacket& recv_data)
{
    ObjectGuid mailboxGuid;
    recv_data >> mailboxGuid;

    if (!CheckMailBox(mailboxGuid))
        return;

    // client can't work with packets > max int16 value
    const uint32 maxPacketSize = 32767;

    uint32 mailsCount = 0;                                  // send to client mails amount

    WorldPacket data(SMSG_MAIL_LIST_RESULT, (200));         // guess size
    data << uint8(0);                                       // mail's count
    time_t cur_time = time(NULL);

    for (PlayerMails::iterator itr = _player->GetMailBegin(); itr != _player->GetMailEnd(); ++itr)
    {
        // packet send mail count as uint8, prevent overflow
        if (mailsCount >= 254)
            break;

        // skip deleted or not delivered (deliver delay not expired) mails
        if ((*itr)->state == MAIL_STATE_DELETED || cur_time < (*itr)->deliver_time)
            continue;

        /*[-ZERO] TODO recheck this
        size_t next_mail_size = 4+1+8+((*itr)->subject.size()+1)+4*7+1+item_count*(1+4+4+6*3*4+4+4+1+4+4+4);

        if(data.wpos()+next_mail_size > maxPacketSize)
            break;
        */

        data << uint32((*itr)->messageID);                  // Message ID
        data << uint8((*itr)->messageType);                 // Message Type

        switch ((*itr)->messageType)
        {
            case MAIL_NORMAL:                               // sender guid
                data << ObjectGuid(HIGHGUID_PLAYER, (*itr)->sender);
                break;
            case MAIL_CREATURE:
            case MAIL_GAMEOBJECT:
            case MAIL_AUCTION:
                data << (uint32)(*itr)->sender;             // creature/gameobject entry, auction id
                break;
            case MAIL_ITEM:                                 // item entry (?) sender = "Unknown", NYI
                break;
        }

        data << (*itr)->subject;                            // Subject string - once 00, when mail type = 3
        data << uint32((*itr)->itemTextId);                 // sure about this
        data << uint32(0);                                  // unknown
        data << uint32((*itr)->stationery);                 // stationery (Stationery.dbc)

        // 1.12.1 can have only single item
        Item* item = (*itr)->items.size() > 0 ? _player->GetMItem((*itr)->items[0].item_guid) : NULL;
        data << uint32(item ? item->GetEntry() : 0);        // entry
        // permanent enchantment
        data << uint32(item ? item->GetEnchantmentId((EnchantmentSlot)PERM_ENCHANTMENT_SLOT) : 0);
        // can be negative
        data << uint32(item ? item->GetItemRandomPropertyId() : 0);
        // unk
        data << uint32(item ? item->GetItemSuffixFactor() : 0);
        data << uint8(item ? item->GetCount() : 0);         // stack count
        data << uint32(item ? item->GetSpellCharges() : 0); // charges
        // durability
        data << uint32(item ? item->GetUInt32Value(ITEM_FIELD_MAXDURABILITY) : 0);
        // durability
        data << uint32(item ? item->GetUInt32Value(ITEM_FIELD_DURABILITY) : 0);
        data << uint32((*itr)->money);                      // copper
        data << uint32((*itr)->COD);                        // Cash on delivery
        data << uint32((*itr)->checked);                    // flags
        data << float(float((*itr)->expire_time - time(NULL)) / float(DAY));// Time
        data << uint32((*itr)->mailTemplateId);             // mail template (MailTemplate.dbc)

        mailsCount += 1;
    }

    data.put<uint8>(0, mailsCount);                         // set real send mails to client
    SendPacket(&data);

    // recalculate m_nextMailDelivereTime and unReadMails
    _player->UpdateNextMailTimeAndUnreads();
}

/**
 * Handles the Packet sent by the client when sending a mail.
 *
 * This methods takes the packet sent by the client and performs the following actions:
 * - Checks whether the mail is valid: i.e. can he send the selected items,
 *   does he have enough money, etc.
 * - Creates a MailDraft and adds the needed items, money, cost data.
 * - Sends the mail.
 *
 * Depending on the outcome of the checks performed the player will recieve a different
 * MailResponseResult.
 *
 * @see MailResponseResult
 * @see SendMailResult()
 *
 * @param recv_data the WorldPacket containing the data sent by the client.
 */
void WorldSession::HandleSendMail(WorldPacket& recv_data)
{
    ObjectGuid mailboxGuid;
    ObjectGuid itemGuid;
    uint64 unk3;
    std::string receiver, subject, body;
    uint32 unk1, unk2, money, COD;
    uint8 unk4;
    recv_data >> mailboxGuid;
    recv_data >> receiver;

    recv_data >> subject;

    recv_data >> body;

    recv_data >> unk1;                                      // stationery?
    recv_data >> unk2;                                      // 0x00000000

    recv_data >> itemGuid;

    recv_data >> money >> COD;                              // money and cod
    recv_data >> unk3;                                      // const 0
    recv_data >> unk4;                                      // const 0

    // packet read complete, now do check

    if (!CheckMailBox(mailboxGuid))
        return;

    if (receiver.empty())
        return;

    Player* pl = _player;

    ObjectGuid rc;
    if (normalizePlayerName(receiver))
        rc = sObjectMgr.GetPlayerGuidByName(receiver);

    if (!rc)
    {
        DETAIL_LOG("%s is sending mail to %s (GUID: nonexistent!) with subject %s and body %s includes %u items, %u copper and %u COD copper with unk1 = %u, unk2 = %u",
                   pl->GetGuidStr().c_str(), receiver.c_str(), subject.c_str(), body.c_str(), itemGuid ? 1 : 0, money, COD, unk1, unk2);
        pl->SendMailResult(0, MAIL_SEND, MAIL_ERR_RECIPIENT_NOT_FOUND);
        return;
    }

    DETAIL_LOG("%s is sending mail to %s with subject %s and body %s includes %u items, %u copper and %u COD copper with unk1 = %u, unk2 = %u",
               pl->GetGuidStr().c_str(), rc.GetString().c_str(), subject.c_str(), body.c_str(), itemGuid ? 1 : 0, money, COD, unk1, unk2);

    if (pl->GetObjectGuid() == rc)
    {
        pl->SendMailResult(0, MAIL_SEND, MAIL_ERR_CANNOT_SEND_TO_SELF);
        return;
    }

    uint32 reqmoney = money + 30;

    if (pl->GetMoney() < reqmoney)
    {
        pl->SendMailResult(0, MAIL_SEND, MAIL_ERR_NOT_ENOUGH_MONEY);
        return;
    }

    Player* receive = sObjectMgr.GetPlayer(rc);

    Team rc_team;
    uint8 mails_count = 0;                                  // do not allow to send to one player more than 100 mails

    if (receive)
    {
        rc_team = receive->GetTeam();
        mails_count = receive->GetMailSize();
    }
    else
    {
        rc_team = sObjectMgr.GetPlayerTeamByGUID(rc);
        if (QueryResult* result = CharacterDatabase.PQuery("SELECT COUNT(*) FROM mail WHERE receiver = '%u'", rc.GetCounter()))
        {
            Field* fields = result->Fetch();
            mails_count = fields[0].GetUInt32();
            delete result;
        }
    }
//.........这里部分代码省略.........