axmol/cocos/base/CCUserDefault.cpp

/****************************************************************************
Copyright (c) 2010-2012 cocos2d-x.org
Copyright (c) 2013-2016 Chukong Technologies Inc.

http://www.cocos2d-x.org

Permission is hereby granted, free of charge, to any person obtaining a copy
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
****************************************************************************/
#include "base/CCUserDefault.h"
#include "platform/CCCommon.h"
#include "platform/CCFileUtils.h"
#include "tinyxml2.h"
#include "base/base64.h"
#include "base/ccUtils.h"

#if (CC_TARGET_PLATFORM != CC_PLATFORM_IOS && CC_TARGET_PLATFORM != CC_PLATFORM_MAC && CC_TARGET_PLATFORM != CC_PLATFORM_ANDROID)

// root name of xml
#define USERDEFAULT_ROOT_NAME    "userDefaultRoot"

#define XML_FILE_NAME "UserDefault.xml"

using namespace std;

NS_CC_BEGIN

/**
 * define the functions here because we don't want to
 * export xmlNodePtr and other types in "CCUserDefault.h"
 */

static tinyxml2::XMLElement* getXMLNodeForKey(const char* pKey, tinyxml2::XMLElement** rootNode, tinyxml2::XMLDocument **doc)
{
    tinyxml2::XMLElement* curNode = nullptr;

    // check the key value
    if (! pKey)
    {
        return nullptr;
    }

    do 
    {
         tinyxml2::XMLDocument* xmlDoc = new (std::nothrow) tinyxml2::XMLDocument();
        *doc = xmlDoc;

        std::string xmlBuffer = FileUtils::getInstance()->getStringFromFile(UserDefault::getInstance()->getXMLFilePath());

        if (xmlBuffer.empty())
        {
            CCLOG("can not read xml file");
            break;
        }
        xmlDoc->Parse(xmlBuffer.c_str(), xmlBuffer.size());

        // get root node
        *rootNode = xmlDoc->RootElement();
        if (nullptr == *rootNode)
        {
            CCLOG("read root node error");
            break;
        }
        // find the node
        curNode = (*rootNode)->FirstChildElement();
        while (nullptr != curNode)
        {
            const char* nodeName = curNode->Value();
            if (!strcmp(nodeName, pKey))
            {
                break;
            }

            curNode = curNode->NextSiblingElement();
        }
    } while (0);

    return curNode;
}

static void setValueForKey(const char* pKey, const char* pValue)
{
     tinyxml2::XMLElement* rootNode;
    tinyxml2::XMLDocument* doc;
    tinyxml2::XMLElement* node;
    // check the params
    if (! pKey || ! pValue)
    {
        return;
    }
    // find the node
    node = getXMLNodeForKey(pKey, &rootNode, &doc);
    // if node exist, change the content
    if (node)
    {
        if (node->FirstChild())
        {
            node->FirstChild()->SetValue(pValue);
        }
        else
        {
            tinyxml2::XMLText* content = doc->NewText(pValue);
            node->LinkEndChild(content);
        }
    }
    else
    {
        if (rootNode)
        {
            tinyxml2::XMLElement* tmpNode = doc->NewElement(pKey);//new tinyxml2::XMLElement(pKey);
            rootNode->LinkEndChild(tmpNode);
            tinyxml2::XMLText* content = doc->NewText(pValue);//new tinyxml2::XMLText(pValue);
            tmpNode->LinkEndChild(content);
        }    
    }

    // save file and free doc
    if (doc)
    {
        doc->SaveFile(FileUtils::getInstance()->getSuitableFOpen(UserDefault::getInstance()->getXMLFilePath()).c_str());
        delete doc;
    }
}

/**
 * implements of UserDefault
 */

UserDefault* UserDefault::_userDefault = nullptr;
string UserDefault::_filePath = string("");
bool UserDefault::_isFilePathInitialized = false;

UserDefault::~UserDefault()
{
}

UserDefault::UserDefault()
{
}

bool UserDefault::getBoolForKey(const char* pKey)
{
 return getBoolForKey(pKey, false);
}

bool UserDefault::getBoolForKey(const char* pKey, bool defaultValue)
{
    const char* value = nullptr;
    tinyxml2::XMLElement* rootNode;
    tinyxml2::XMLDocument* doc;
    tinyxml2::XMLElement* node;
    node =  getXMLNodeForKey(pKey, &rootNode, &doc);
    // find the node
    if (node && node->FirstChild())
    {
        value = (const char*)(node->FirstChild()->Value());
    }

    bool ret = defaultValue;

    if (value)
    {
        ret = (! strcmp(value, "true"));
    }

    if (doc) delete doc;

    return ret;
}

int UserDefault::getIntegerForKey(const char* pKey)
{
    return getIntegerForKey(pKey, 0);
}

int UserDefault::getIntegerForKey(const char* pKey, int defaultValue)
{
    const char* value = nullptr;
    tinyxml2::XMLElement* rootNode;
    tinyxml2::XMLDocument* doc;
    tinyxml2::XMLElement* node;
    node =  getXMLNodeForKey(pKey, &rootNode, &doc);
    // find the node
    if (node && node->FirstChild())
    {
        value = (const char*)(node->FirstChild()->Value());
    }

    int ret = defaultValue;

    if (value)
    {
        ret = atoi(value);
    }

    if(doc)
    {
        delete doc;
    }


    return ret;
}

float UserDefault::getFloatForKey(const char* pKey)
{
    return getFloatForKey(pKey, 0.0f);
}

float UserDefault::getFloatForKey(const char* pKey, float defaultValue)
{
    float ret = (float)getDoubleForKey(pKey, (double)defaultValue);
 
    return ret;
}

double  UserDefault::getDoubleForKey(const char* pKey)
{
    return getDoubleForKey(pKey, 0.0);
}

double UserDefault::getDoubleForKey(const char* pKey, double defaultValue)
{
    const char* value = nullptr;
    tinyxml2::XMLElement* rootNode;
    tinyxml2::XMLDocument* doc;
    tinyxml2::XMLElement* node;
    node =  getXMLNodeForKey(pKey, &rootNode, &doc);
    // find the node
    if (node && node->FirstChild())
    {
        value = (const char*)(node->FirstChild()->Value());
    }

    double ret = defaultValue;

    if (value)
    {
        ret = utils::atof(value);
    }

    if (doc) delete doc;

    return ret;
}

std::string UserDefault::getStringForKey(const char* pKey)
{
    return getStringForKey(pKey, "");
}

string UserDefault::getStringForKey(const char* pKey, const std::string & defaultValue)
{
    const char* value = nullptr;
    tinyxml2::XMLElement* rootNode;
    tinyxml2::XMLDocument* doc;
    tinyxml2::XMLElement* node;
    node =  getXMLNodeForKey(pKey, &rootNode, &doc);
    // find the node
    if (node && node->FirstChild())
    {
        value = (const char*)(node->FirstChild()->Value());
    }

    string ret = defaultValue;

    if (value)
    {
        ret = string(value);
    }

    if (doc) delete doc;

    return ret;
}

Data UserDefault::getDataForKey(const char* pKey)
{
    return getDataForKey(pKey, Data::Null);
}

Data UserDefault::getDataForKey(const char* pKey, const Data& defaultValue)
{
    const char* encodedData = nullptr;
    tinyxml2::XMLElement* rootNode;
    tinyxml2::XMLDocument* doc;
    tinyxml2::XMLElement* node;
    node =  getXMLNodeForKey(pKey, &rootNode, &doc);
    // find the node
    if (node && node->FirstChild())
    {
        encodedData = (const char*)(node->FirstChild()->Value());
    }
    
    Data ret = defaultValue;
    
    if (encodedData)
    {
        unsigned char * decodedData = nullptr;
        int decodedDataLen = base64Decode((unsigned char*)encodedData, (unsigned int)strlen(encodedData), &decodedData);
        
        if (decodedData) {
            ret.fastSet(decodedData, decodedDataLen);
        }
    }
    
    if (doc) delete doc;
    
    return ret;    
}


void UserDefault::setBoolForKey(const char* pKey, bool value)
{
    // save bool value as string

    if (true == value)
    {
        setStringForKey(pKey, "true");
    }
    else
    {
        setStringForKey(pKey, "false");
    }
}

void UserDefault::setIntegerForKey(const char* pKey, int value)
{
    // check key
    if (! pKey)
    {
        return;
    }

    // format the value
    char tmp[50];
    memset(tmp, 0, 50);
    sprintf(tmp, "%d", value);

    setValueForKey(pKey, tmp);
}

void UserDefault::setFloatForKey(const char* pKey, float value)
{
    setDoubleForKey(pKey, value);
}

void UserDefault::setDoubleForKey(const char* pKey, double value)
{
    // check key
    if (! pKey)
    {
        return;
    }

    // format the value
    char tmp[50];
    memset(tmp, 0, 50);
    sprintf(tmp, "%f", value);

    setValueForKey(pKey, tmp);
}

void UserDefault::setStringForKey(const char* pKey, const std::string & value)
{
    // check key
    if (! pKey)
    {
        return;
    }

    setValueForKey(pKey, value.c_str());
}

void UserDefault::setDataForKey(const char* pKey, const Data& value) {
    // check key
    if (! pKey)
    {
        return;
    }

    char *encodedData = nullptr;
    
    base64Encode(value.getBytes(), static_cast<unsigned int>(value.getSize()), &encodedData);
        
    setValueForKey(pKey, encodedData);
    
    if (encodedData)
        free(encodedData);
}

UserDefault* UserDefault::getInstance()
{
    if (!_userDefault)
    {
        initXMLFilePath();

        // only create xml file one time
        // the file exists after the program exit
        if ((!isXMLFileExist()) && (!createXMLFile()))
        {
            return nullptr;
        }

        _userDefault = new (std::nothrow) UserDefault();
    }

    return _userDefault;
}

void UserDefault::destroyInstance()
{
    CC_SAFE_DELETE(_userDefault);
}

void UserDefault::setDelegate(UserDefault *delegate)
{
    if (_userDefault)
        delete _userDefault;

    _userDefault = delegate;
}


// FIXME:: deprecated
UserDefault* UserDefault::sharedUserDefault()
{
    return UserDefault::getInstance();
}

// FIXME:: deprecated
void UserDefault::purgeSharedUserDefault()
{
    return UserDefault::destroyInstance();
}

bool UserDefault::isXMLFileExist()
{
    return FileUtils::getInstance()->isFileExist(_filePath);
}

void UserDefault::initXMLFilePath()
{
    if (! _isFilePathInitialized)
    {
        _filePath += FileUtils::getInstance()->getWritablePath() + XML_FILE_NAME;
        _isFilePathInitialized = true;
    }    
}

// create new xml file
bool UserDefault::createXMLFile()
{
    bool bRet = false;  
    tinyxml2::XMLDocument *pDoc = new (std::nothrow) tinyxml2::XMLDocument(); 
    if (nullptr==pDoc)  
    {  
        return false;  
    }  
    tinyxml2::XMLDeclaration *pDeclaration = pDoc->NewDeclaration(nullptr);  
    if (nullptr==pDeclaration)  
    {  
        return false;  
    }  
    pDoc->LinkEndChild(pDeclaration); 
    tinyxml2::XMLElement *pRootEle = pDoc->NewElement(USERDEFAULT_ROOT_NAME);  
    if (nullptr==pRootEle)  
    {  
        return false;  
    }  
    pDoc->LinkEndChild(pRootEle);  
    bRet = tinyxml2::XML_SUCCESS == pDoc->SaveFile(FileUtils::getInstance()->getSuitableFOpen(_filePath).c_str());

    if(pDoc)
    {
        delete pDoc;
    }

    return bRet;
}

const string& UserDefault::getXMLFilePath()
{
    return _filePath;
}

void UserDefault::flush()
{
}

void UserDefault::deleteValueForKey(const char* key)
{
    tinyxml2::XMLElement* rootNode;
    tinyxml2::XMLDocument* doc;
    tinyxml2::XMLElement* node;

    // check the params
    if (!key)
    {
        CCLOG("the key is invalid");
        return;
    }

    // find the node
    node = getXMLNodeForKey(key, &rootNode, &doc);

    // if node not exist, don't need to delete
    if (!node)
    {
        return;
    }

    // save file and free doc
    if (doc)
    {
        doc->DeleteNode(node);
        doc->SaveFile(FileUtils::getInstance()->getSuitableFOpen(UserDefault::getInstance()->getXMLFilePath()).c_str());
        delete doc;
    }

    flush();
}

NS_CC_END

#endif // (CC_TARGET_PLATFORM != CC_PLATFORM_IOS && CC_PLATFORM != CC_PLATFORM_ANDROID)