cocos2d 保存最近登陆多个账号最多一个月

<?xml version="1.0" encoding = "utf-8" ?>
<rootNode>
    <userinfo time="1449905923">
        <account>abc002</account>
        <password>a123456</password>
    </userinfo>
    <userinfo time="1430905758">
        <account>abc001</account>
        <password>a123456</password>
    </userinfo>
</rootNode>

#include "AccountManager.h"
#include "external/tinyxml2/tinyxml2.h"

#define                        ACCOUNT_FILE_NAME                    "userAccounts.xml"
#define                        ACCOUNT_SAVE_COUNT            5                //保存的账号数量
#define                        SECONDS_OF_DAY                        86400        //一天的秒数
#define                        LIMIT_DAY                                        30LL        //过效天数

 AccountManager    *    AccountManager::m_pSelf = nullptr;

 struct  LoginAccountInfo
 {
     string strAccount;                        //账号
     string strPassword;                    //密码
     string strDate;                            //最近登陆日期
 };

AccountManager::AccountManager()
{
    string strPath = FileUtils::getInstance()->getWritablePath() + ACCOUNT_FILE_NAME;

    if (FileUtils::getInstance()->isFileExist(strPath))
    {
        //提取账号信息到内存
        tinyxml2::XMLDocument *pxmlDocument = new tinyxml2::XMLDocument;
        pxmlDocument->LoadFile(strPath.c_str());

        auto pxmlRootNode = pxmlDocument->RootElement();

        auto pxmlNodeUinfo = pxmlRootNode->FirstChildElement();
        while (pxmlNodeUinfo)
        {
            LoginAccountInfo accinfo;
            accinfo.strDate = pxmlNodeUinfo->Attribute("time");
            
            auto pxmlNodeAccunt = pxmlNodeUinfo->FirstChildElement();
            accinfo.strAccount = pxmlNodeAccunt->GetText();

            auto pxmlNodePassword = pxmlNodeAccunt->NextSiblingElement();
            accinfo.strPassword = pxmlNodePassword->GetText();

            m_vectorAccountsInfo.push_back(accinfo);
            pxmlNodeUinfo = pxmlNodeUinfo->NextSiblingElement();
        }
    }
}

//保存账号到文件
void    AccountManager::saveAccountInfoToFile(const string &strAccounts, const string &strPassword)
{
    //排序账号
    auto iteratorStr = m_vectorAccountsInfo.begin();
    for (; iteratorStr != m_vectorAccountsInfo.end();++iteratorStr)
    {
        if ((*iteratorStr).strAccount == strAccounts)
        {
            m_vectorAccountsInfo.erase(iteratorStr);
            break;
        }
    }

    //判断保存的账号是否超过5个
    if (m_vectorAccountsInfo.size() >= ACCOUNT_SAVE_COUNT) m_vectorAccountsInfo.pop_back();

    LoginAccountInfo accinfo;
    accinfo.strAccount = strAccounts;
    accinfo.strPassword = strPassword;
    accinfo.strDate = getCurrentDate();
    m_vectorAccountsInfo.insert(m_vectorAccountsInfo.begin(), accinfo);

    tinyxml2::XMLDocument     *pxmlDoc = new tinyxml2::XMLDocument();
    //声明
    tinyxml2::XMLDeclaration    *pxmlDeclare = pxmlDoc->NewDeclaration("xml version=\"1.0\" encoding = \"utf-8\" ");
    assert(pxmlDeclare);
    if (pxmlDeclare == nullptr) return;
    pxmlDoc->LinkEndChild(pxmlDeclare);

    //根结点
    tinyxml2::XMLElement *pxmlRootNode = pxmlDoc->NewElement("rootNode");

    //添加账号子节点
    for (size_t i = 0; i < m_vectorAccountsInfo.size(); i++)
    {
        auto pxmlNodeUInfo = pxmlDoc->NewElement("userinfo");
        pxmlNodeUInfo->SetAttribute("time", m_vectorAccountsInfo.at(i).strDate.c_str());

        auto pxmlNodeAccount = pxmlDoc->NewElement("account");
        pxmlNodeAccount->LinkEndChild(pxmlDoc->NewText(m_vectorAccountsInfo.at(i).strAccount.c_str()));
        pxmlNodeUInfo->LinkEndChild(pxmlNodeAccount);

        auto pxmlNodePassword = pxmlDoc->NewElement("password");
        pxmlNodePassword->LinkEndChild(pxmlDoc->NewText(m_vectorAccountsInfo.at(i).strPassword.c_str()));
        pxmlNodeUInfo->LinkEndChild(pxmlNodePassword);

        pxmlRootNode->LinkEndChild(pxmlNodeUInfo);
    }
    pxmlDoc->LinkEndChild(pxmlRootNode);

    //保存到文件
    if (pxmlDoc)
    {
        string strPath = FileUtils::getInstance()->getWritablePath() + ACCOUNT_FILE_NAME;
        pxmlDoc->SaveFile(FileUtils::getInstance()->getSuitableFOpen(strPath).c_str());
        delete pxmlDoc;
    }
}

//获取当前时间 总秒值
string AccountManager::getCurrentDate()
{
    time_t llTimeStamp = time(nullptr);

    string strDate;

    strDate = StringUtils::format("%lld", llTimeStamp);

    return strDate;
}

//判断账号是否保存超过限制天数
bool AccountManager::IsAcccountOutOfDate(const string &strAccount)
{
    for (auto accinfo : m_vectorAccountsInfo)
    {
        if (accinfo.strAccount == strAccount)
        {
            long long llLoginTime = atoll(accinfo.strDate.c_str());
            long long llNowTime = atoll(getCurrentDate().c_str());
            long long llDay = (llNowTime - llLoginTime) / SECONDS_OF_DAY;

            if (llDay > LIMIT_DAY)
            {
                return true;
            }
            return false;
        }
    }
    return false;
}

//获取所有账号
vector<string> AccountManager::getAllAccount()
{
    vector<string> vectorAccounts;

    for (auto accinfo : m_vectorAccountsInfo)
    {
        vectorAccounts.push_back(accinfo.strAccount);
    }

    return vectorAccounts;
}