India/cocos2d-x/cocos/platform/CCFileUtils.cpp

/****************************************************************************
Copyright (c) 2010-2013 cocos2d-x.org
Copyright (c) 2013-2016 Chukong Technologies Inc.
Copyright (c) 2017-2018 Xiamen Yaji Software Co., Ltd.

http://www.cocos2d-x.org

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
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furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.

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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
****************************************************************************/

#include "platform/CCFileUtils.h"

#include <stack>

#include "base/CCData.h"
#include "base/ccMacros.h"
#include "base/CCDirector.h"
#include "platform/CCSAXParser.h"
//#include "base/ccUtils.h"

#include "tinyxml2/tinyxml2.h"
#ifdef MINIZIP_FROM_SYSTEM
#include <minizip/unzip.h>
#else // from our embedded sources
#include "unzip.h"
#endif
#include <sys/stat.h>

NS_CC_BEGIN

// Implement DictMaker

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

typedef enum
{
    SAX_NONE = 0,
    SAX_KEY,
    SAX_DICT,
    SAX_INT,
    SAX_REAL,
    SAX_STRING,
    SAX_ARRAY
}SAXState;

typedef enum
{
    SAX_RESULT_NONE = 0,
    SAX_RESULT_DICT,
    SAX_RESULT_ARRAY
}SAXResult;

class DictMaker : public SAXDelegator
{
public:
    SAXResult _resultType;
    ValueMap _rootDict;
    ValueVector _rootArray;

    std::string _curKey;   ///< parsed key
    std::string _curValue; // parsed value
    SAXState _state;

    ValueMap*  _curDict;
    ValueVector* _curArray;

    std::stack<ValueMap*> _dictStack;
    std::stack<ValueVector*> _arrayStack;
    std::stack<SAXState>  _stateStack;

public:
    DictMaker()
        : _resultType(SAX_RESULT_NONE)
        , _state(SAX_NONE)
    {
    }

    ~DictMaker()
    {
    }

    ValueMap dictionaryWithContentsOfFile(const std::string& fileName)
    {
        _resultType = SAX_RESULT_DICT;
        SAXParser parser;

        CCASSERT(parser.init("UTF-8"), "The file format isn't UTF-8");
        parser.setDelegator(this);

        parser.parse(fileName);
        return _rootDict;
    }

    ValueMap dictionaryWithDataOfFile(const char* filedata, int filesize)
    {
        _resultType = SAX_RESULT_DICT;
        SAXParser parser;

        CCASSERT(parser.init("UTF-8"), "The file format isn't UTF-8");
        parser.setDelegator(this);

        parser.parse(filedata, filesize);
        return _rootDict;
    }

    ValueVector arrayWithContentsOfFile(const std::string& fileName)
    {
        _resultType = SAX_RESULT_ARRAY;
        SAXParser parser;

        CCASSERT(parser.init("UTF-8"), "The file format isn't UTF-8");
        parser.setDelegator(this);

        parser.parse(fileName);
        return _rootArray;
    }

    void startElement(void *ctx, const char *name, const char **atts) override
    {
        const std::string sName(name);
        if( sName == "dict" )
        {
            if(_resultType == SAX_RESULT_DICT && _rootDict.empty())
            {
                _curDict = &_rootDict;
            }

            _state = SAX_DICT;

            SAXState preState = SAX_NONE;
            if (! _stateStack.empty())
            {
                preState = _stateStack.top();
            }

            if (SAX_ARRAY == preState)
            {
                // add a new dictionary into the array
                _curArray->push_back(Value(ValueMap()));
                _curDict = &(_curArray->rbegin())->asValueMap();
            }
            else if (SAX_DICT == preState)
            {
                // add a new dictionary into the pre dictionary
                CCASSERT(! _dictStack.empty(), "The state is wrong!");
                ValueMap* preDict = _dictStack.top();
                (*preDict)[_curKey] = Value(ValueMap());
                _curDict = &(*preDict)[_curKey].asValueMap();
            }

            // record the dict state
            _stateStack.push(_state);
            _dictStack.push(_curDict);
        }
        else if(sName == "key")
        {
            _state = SAX_KEY;
        }
        else if(sName == "integer")
        {
            _state = SAX_INT;
        }
        else if(sName == "real")
        {
            _state = SAX_REAL;
        }
        else if(sName == "string")
        {
            _state = SAX_STRING;
        }
        else if (sName == "array")
        {
            _state = SAX_ARRAY;

            if (_resultType == SAX_RESULT_ARRAY && _rootArray.empty())
            {
                _curArray = &_rootArray;
            }
            SAXState preState = SAX_NONE;
            if (! _stateStack.empty())
            {
                preState = _stateStack.top();
            }

            if (preState == SAX_DICT)
            {
                (*_curDict)[_curKey] = Value(ValueVector());
                _curArray = &(*_curDict)[_curKey].asValueVector();
            }
            else if (preState == SAX_ARRAY)
            {
                CCASSERT(! _arrayStack.empty(), "The state is wrong!");
                ValueVector* preArray = _arrayStack.top();
                preArray->push_back(Value(ValueVector()));
                _curArray = &(_curArray->rbegin())->asValueVector();
            }
            // record the array state
            _stateStack.push(_state);
            _arrayStack.push(_curArray);
        }
        else
        {
            _state = SAX_NONE;
        }
    }

    void endElement(void *ctx, const char *name) override
    {
        SAXState curState = _stateStack.empty() ? SAX_DICT : _stateStack.top();
        const std::string sName((char*)name);
        if( sName == "dict" )
        {
            _stateStack.pop();
            _dictStack.pop();
            if ( !_dictStack.empty())
            {
                _curDict = _dictStack.top();
            }
        }
        else if (sName == "array")
        {
            _stateStack.pop();
            _arrayStack.pop();
            if (! _arrayStack.empty())
            {
                _curArray = _arrayStack.top();
            }
        }
        else if (sName == "true")
        {
            if (SAX_ARRAY == curState)
            {
                _curArray->push_back(Value(true));
            }
            else if (SAX_DICT == curState)
            {
                (*_curDict)[_curKey] = Value(true);
            }
        }
        else if (sName == "false")
        {
            if (SAX_ARRAY == curState)
            {
                _curArray->push_back(Value(false));
            }
            else if (SAX_DICT == curState)
            {
                (*_curDict)[_curKey] = Value(false);
            }
        }
        else if (sName == "string" || sName == "integer" || sName == "real")
        {
            if (SAX_ARRAY == curState)
            {
                if (sName == "string")
                    _curArray->push_back(Value(_curValue));
                else if (sName == "integer")
                    _curArray->push_back(Value(atoi(_curValue.c_str())));
                else
                    _curArray->push_back(Value(std::atof(_curValue.c_str())));
            }
            else if (SAX_DICT == curState)
            {
                if (sName == "string")
                    (*_curDict)[_curKey] = Value(_curValue);
                else if (sName == "integer")
                    (*_curDict)[_curKey] = Value(atoi(_curValue.c_str()));
                else
                    (*_curDict)[_curKey] = Value(std::atof(_curValue.c_str()));
            }

            _curValue.clear();
        }

        _state = SAX_NONE;
    }

    void textHandler(void *ctx, const char *ch, size_t len) override
    {
        if (_state == SAX_NONE)
        {
            return;
        }

        SAXState curState = _stateStack.empty() ? SAX_DICT : _stateStack.top();
        const std::string text = std::string((char*)ch,len);

        switch(_state)
        {
        case SAX_KEY:
            _curKey = text;
            break;
        case SAX_INT:
        case SAX_REAL:
        case SAX_STRING:
            {
                if (curState == SAX_DICT)
                {
                    CCASSERT(!_curKey.empty(), "key not found : <integer/real>");
                }

                _curValue.append(text);
            }
            break;
        default:
            break;
        }
    }
};

ValueMap FileUtils::getValueMapFromFile(const std::string& filename)
{
    const std::string fullPath = fullPathForFilename(filename);
    DictMaker tMaker;
    return tMaker.dictionaryWithContentsOfFile(fullPath);
}

ValueMap FileUtils::getValueMapFromData(const char* filedata, int filesize)
{
    DictMaker tMaker;
    return tMaker.dictionaryWithDataOfFile(filedata, filesize);
}

ValueVector FileUtils::getValueVectorFromFile(const std::string& filename)
{
    const std::string fullPath = fullPathForFilename(filename);
    DictMaker tMaker;
    return tMaker.arrayWithContentsOfFile(fullPath);
}


/*
 * forward statement
 */
static tinyxml2::XMLElement* generateElementForArray(const ValueVector& array, tinyxml2::XMLDocument *doc);
static tinyxml2::XMLElement* generateElementForDict(const ValueMap& dict, tinyxml2::XMLDocument *doc);

/*
 * Use tinyxml2 to write plist files
 */
bool FileUtils::writeToFile(const ValueMap& dict, const std::string &fullPath)
{
    return writeValueMapToFile(dict, fullPath);
}

bool FileUtils::writeValueMapToFile(const ValueMap& dict, const std::string& fullPath)
{
    tinyxml2::XMLDocument *doc = new (std::nothrow)tinyxml2::XMLDocument();
    if (nullptr == doc)
        return false;

    tinyxml2::XMLDeclaration *declaration = doc->NewDeclaration("xml version=\"1.0\" encoding=\"UTF-8\"");
    if (nullptr == declaration)
    {
        delete doc;
        return false;
    }

    doc->LinkEndChild(declaration);
    tinyxml2::XMLElement *docType = doc->NewElement("!DOCTYPE plist PUBLIC \"-//Apple//DTD PLIST 1.0//EN\" \"http://www.apple.com/DTDs/PropertyList-1.0.dtd\"");
    doc->LinkEndChild(docType);

    tinyxml2::XMLElement *rootEle = doc->NewElement("plist");
    if (nullptr == rootEle)
    {
        delete doc;
        return false;
    }
    rootEle->SetAttribute("version", "1.0");
    doc->LinkEndChild(rootEle);

    tinyxml2::XMLElement *innerDict = generateElementForDict(dict, doc);
    if (nullptr == innerDict)
    {
        delete doc;
        return false;
    }
    rootEle->LinkEndChild(innerDict);

    bool ret = tinyxml2::XML_SUCCESS == doc->SaveFile(getSuitableFOpen(fullPath).c_str());

    delete doc;
    return ret;
}

bool FileUtils::writeValueVectorToFile(const ValueVector& vecData, const std::string& fullPath)
{
    tinyxml2::XMLDocument *doc = new (std::nothrow)tinyxml2::XMLDocument();
    if (nullptr == doc)
        return false;

    tinyxml2::XMLDeclaration *declaration = doc->NewDeclaration("xml version=\"1.0\" encoding=\"UTF-8\"");
    if (nullptr == declaration)
    {
        delete doc;
        return false;
    }

    doc->LinkEndChild(declaration);
    tinyxml2::XMLElement *docType = doc->NewElement("!DOCTYPE plist PUBLIC \"-//Apple//DTD PLIST 1.0//EN\" \"http://www.apple.com/DTDs/PropertyList-1.0.dtd\"");
    doc->LinkEndChild(docType);

    tinyxml2::XMLElement *rootEle = doc->NewElement("plist");
    if (nullptr == rootEle)
    {
        delete doc;
        return false;
    }
    rootEle->SetAttribute("version", "1.0");
    doc->LinkEndChild(rootEle);

    tinyxml2::XMLElement *innerDict = generateElementForArray(vecData, doc);
    if (nullptr == innerDict)
    {
        delete doc;
        return false;
    }
    rootEle->LinkEndChild(innerDict);

    bool ret = tinyxml2::XML_SUCCESS == doc->SaveFile(getSuitableFOpen(fullPath).c_str());

    delete doc;
    return ret;
}

/*
 * Generate tinyxml2::XMLElement for Object through a tinyxml2::XMLDocument
 */
static tinyxml2::XMLElement* generateElementForObject(const Value& value, tinyxml2::XMLDocument *doc)
{
    // object is String
    if (value.getType() == Value::Type::STRING)
    {
        tinyxml2::XMLElement* node = doc->NewElement("string");
        tinyxml2::XMLText* content = doc->NewText(value.asString().c_str());
        node->LinkEndChild(content);
        return node;
    }

    // object is integer
    if (value.getType() == Value::Type::INTEGER)
    {
        tinyxml2::XMLElement* node = doc->NewElement("integer");
        tinyxml2::XMLText* content = doc->NewText(value.asString().c_str());
        node->LinkEndChild(content);
        return node;
    }

    // object is real
    if (value.getType() == Value::Type::FLOAT || value.getType() == Value::Type::DOUBLE)
    {
        tinyxml2::XMLElement* node = doc->NewElement("real");
        tinyxml2::XMLText* content = doc->NewText(value.asString().c_str());
        node->LinkEndChild(content);
        return node;
    }

    //object is bool
    if (value.getType() == Value::Type::BOOLEAN) {
        tinyxml2::XMLElement* node = doc->NewElement(value.asString().c_str());
        return node;
    }

    // object is Array
    if (value.getType() == Value::Type::VECTOR)
        return generateElementForArray(value.asValueVector(), doc);

    // object is Dictionary
    if (value.getType() == Value::Type::MAP)
        return generateElementForDict(value.asValueMap(), doc);

    CCLOG("This type cannot appear in property list");
    return nullptr;
}

/*
 * Generate tinyxml2::XMLElement for Dictionary through a tinyxml2::XMLDocument
 */
static tinyxml2::XMLElement* generateElementForDict(const ValueMap& dict, tinyxml2::XMLDocument *doc)
{
    tinyxml2::XMLElement* rootNode = doc->NewElement("dict");

    for (const auto &iter : dict)
    {
        tinyxml2::XMLElement* tmpNode = doc->NewElement("key");
        rootNode->LinkEndChild(tmpNode);
        tinyxml2::XMLText* content = doc->NewText(iter.first.c_str());
        tmpNode->LinkEndChild(content);

        tinyxml2::XMLElement *element = generateElementForObject(iter.second, doc);
        if (element)
            rootNode->LinkEndChild(element);
    }
    return rootNode;
}

/*
 * Generate tinyxml2::XMLElement for Array through a tinyxml2::XMLDocument
 */
static tinyxml2::XMLElement* generateElementForArray(const ValueVector& array, tinyxml2::XMLDocument *pDoc)
{
    tinyxml2::XMLElement* rootNode = pDoc->NewElement("array");

    for(const auto &value : array) {
        tinyxml2::XMLElement *element = generateElementForObject(value, pDoc);
        if (element)
            rootNode->LinkEndChild(element);
    }
    return rootNode;
}

#else

/* The subclass FileUtilsApple should override these two method. */
ValueMap FileUtils::getValueMapFromFile(const std::string& /*filename*/) {return ValueMap();}
ValueMap FileUtils::getValueMapFromData(const char* /*filedata*/, int /*filesize*/) {return ValueMap();}
ValueVector FileUtils::getValueVectorFromFile(const std::string& /*filename*/) {return ValueVector();}
bool FileUtils::writeToFile(const ValueMap& /*dict*/, const std::string &/*fullPath*/) {return false;}

#endif /* (CC_TARGET_PLATFORM != CC_PLATFORM_IOS) && (CC_TARGET_PLATFORM != CC_PLATFORM_MAC) */

// Implement FileUtils
FileUtils* FileUtils::s_sharedFileUtils = nullptr;

void FileUtils::destroyInstance()
{
    CC_SAFE_DELETE(s_sharedFileUtils);
}

void FileUtils::setDelegate(FileUtils *delegate)
{
    if (s_sharedFileUtils)
        delete s_sharedFileUtils;

    s_sharedFileUtils = delegate;
}

FileUtils::FileUtils()
    : _writablePath("")
{
}

FileUtils::~FileUtils()
{
}

bool FileUtils::writeStringToFile(const std::string& dataStr, const std::string& fullPath)
{
    Data data;
    data.fastSet((unsigned char*)dataStr.c_str(), dataStr.size());

    bool rv = writeDataToFile(data, fullPath);

    data.fastSet(nullptr, 0);
    return rv;
}

void FileUtils::writeStringToFile(std::string dataStr, const std::string& fullPath, std::function<void(bool)> callback)
{
    performOperationOffthread([fullPath](const std::string& dataStrIn) -> bool {
        return FileUtils::getInstance()->writeStringToFile(dataStrIn, fullPath);
    }, std::move(callback),std::move(dataStr));
}

bool FileUtils::writeDataToFile(const Data& data, const std::string& fullPath)
{
    size_t size = 0;
    const char* mode = "wb";

    CCASSERT(!fullPath.empty() && data.getSize() != 0, "Invalid parameters.");

    auto fileutils = FileUtils::getInstance();
    do
    {
        // Read the file from hardware
        FILE *fp = fopen(fileutils->getSuitableFOpen(fullPath).c_str(), mode);
        CC_BREAK_IF(!fp);
        size = data.getSize();

        fwrite(data.getBytes(), size, 1, fp);

        fclose(fp);

        return true;
    } while (0);

    return false;
}

void FileUtils::writeDataToFile(Data data, const std::string& fullPath, std::function<void(bool)> callback)
{
    performOperationOffthread([fullPath](const Data& dataIn) -> bool {
        return FileUtils::getInstance()->writeDataToFile(dataIn, fullPath);
    }, std::move(callback), std::move(data));
}

bool FileUtils::init()
{
    _searchPathArray.push_back(_defaultResRootPath);
    _searchResolutionsOrderArray.push_back("");
    return true;
}

void FileUtils::purgeCachedEntries()
{
    _fullPathCache.clear();
}

std::string FileUtils::getStringFromFile(const std::string& filename)
{
    std::string s;
    getContents(filename, &s);
    return s;
}

void FileUtils::getStringFromFile(const std::string &path, std::function<void (std::string)> callback)
{
    // Get the full path on the main thread, to avoid the issue that FileUtil's is not
    // thread safe, and accessing the fullPath cache and searching the search paths is not thread safe
    auto fullPath = fullPathForFilename(path);
    performOperationOffthread([fullPath]() -> std::string {
        return FileUtils::getInstance()->getStringFromFile(fullPath);
    }, std::move(callback));
}

Data FileUtils::getDataFromFile(const std::string& filename)
{
    Data d;
    getContents(filename, &d);
    return d;
}

void FileUtils::getDataFromFile(const std::string& filename, std::function<void(Data)> callback)
{
    auto fullPath = fullPathForFilename(filename);
    performOperationOffthread([fullPath]() -> Data {
        return FileUtils::getInstance()->getDataFromFile(fullPath);
    }, std::move(callback));
}

FileUtils::Status FileUtils::getContents(const std::string& filename, ResizableBuffer* buffer)
{
    if (filename.empty())
        return Status::NotExists;

    auto fs = FileUtils::getInstance();

    std::string fullPath = fs->fullPathForFilename(filename);
    if (fullPath.empty())
        return Status::NotExists;

    FILE *fp = fopen(fs->getSuitableFOpen(fullPath).c_str(), "rb");
    if (!fp)
        return Status::OpenFailed;

#if defined(_MSC_VER)
    auto descriptor = _fileno(fp);
#else
    auto descriptor = fileno(fp);
#endif
    struct stat statBuf;
    if (fstat(descriptor, &statBuf) == -1) {
        fclose(fp);
        return Status::ReadFailed;
    }
    size_t size = statBuf.st_size;

    buffer->resize(size);
    size_t readsize = fread(buffer->buffer(), 1, size, fp);
    fclose(fp);

    if (readsize < size) {
        buffer->resize(readsize);
        return Status::ReadFailed;
    }

    return Status::OK;
}

unsigned char* FileUtils::getFileData(const std::string& filename, const char* mode, ssize_t *size)
{
    CCASSERT(!filename.empty() && size != nullptr && mode != nullptr, "Invalid parameters.");
    (void)(mode); // mode is unused, as we do not support text mode any more...

    Data d;
    if (getContents(filename, &d) != Status::OK) {
        *size = 0;
        return nullptr;
    }

    return d.takeBuffer(size);
}

unsigned char* FileUtils::getFileDataFromZip(const std::string& zipFilePath, const std::string& filename, ssize_t *size)
{
    unsigned char * buffer = nullptr;
    unzFile file = nullptr;
    *size = 0;

    do
    {
        CC_BREAK_IF(zipFilePath.empty());

        file = unzOpen(FileUtils::getInstance()->getSuitableFOpen(zipFilePath).c_str());
        CC_BREAK_IF(!file);

        // FIXME: Other platforms should use upstream minizip like mingw-w64
#ifdef MINIZIP_FROM_SYSTEM
        int ret = unzLocateFile(file, filename.c_str(), NULL);
#else
        int ret = unzLocateFile(file, filename.c_str(), 1);
#endif
        CC_BREAK_IF(UNZ_OK != ret);

        char filePathA[260];
        unz_file_info fileInfo;
        ret = unzGetCurrentFileInfo(file, &fileInfo, filePathA, sizeof(filePathA), nullptr, 0, nullptr, 0);
        CC_BREAK_IF(UNZ_OK != ret);

        ret = unzOpenCurrentFile(file);
        CC_BREAK_IF(UNZ_OK != ret);

        buffer = (unsigned char*)malloc(fileInfo.uncompressed_size);
        int CC_UNUSED readedSize = unzReadCurrentFile(file, buffer, static_cast<unsigned>(fileInfo.uncompressed_size));
        CCASSERT(readedSize == 0 || readedSize == (int)fileInfo.uncompressed_size, "the file size is wrong");

        *size = fileInfo.uncompressed_size;
        unzCloseCurrentFile(file);
    } while (0);

    if (file)
    {
        unzClose(file);
    }

    return buffer;
}

void FileUtils::writeValueMapToFile(ValueMap dict, const std::string& fullPath, std::function<void(bool)> callback)
{
    
    performOperationOffthread([fullPath](const ValueMap& dictIn) -> bool {
        return FileUtils::getInstance()->writeValueMapToFile(dictIn, fullPath);
    }, std::move(callback), std::move(dict));
}

void FileUtils::writeValueVectorToFile(ValueVector vecData, const std::string& fullPath, std::function<void(bool)> callback)
{
    performOperationOffthread([fullPath] (const ValueVector& vecDataIn) -> bool {
        return FileUtils::getInstance()->writeValueVectorToFile(vecDataIn, fullPath);
    }, std::move(callback), std::move(vecData));
}

std::string FileUtils::getNewFilename(const std::string &filename) const
{
    std::string newFileName;

    // in Lookup Filename dictionary ?
    auto iter = _filenameLookupDict.find(filename);

    if (iter == _filenameLookupDict.end())
    {
        newFileName = filename;
    }
    else
    {
        newFileName = iter->second.asString();
    }
    return newFileName;
}

std::string FileUtils::getPathForFilename(const std::string& filename, const std::string& resolutionDirectory, const std::string& searchPath) const
{
    std::string file = filename;
    std::string file_path = "";
    size_t pos = filename.find_last_of("/");
    if (pos != std::string::npos)
    {
        file_path = filename.substr(0, pos+1);
        file = filename.substr(pos+1);
    }

    // searchPath + file_path + resourceDirectory
    std::string path = searchPath;
    path += file_path;
    path += resolutionDirectory;

    path = getFullPathForDirectoryAndFilename(path, file);

    return path;
}

std::string FileUtils::fullPathForFilename(const std::string &filename) const
{
    if (filename.empty())
    {
        return "";
    }

    if (isAbsolutePath(filename))
    {
        return filename;
    }

    // Already Cached ?
    auto cacheIter = _fullPathCache.find(filename);
    if(cacheIter != _fullPathCache.end())
    {
        return cacheIter->second;
    }

    // Get the new file name.
    const std::string newFilename( getNewFilename(filename) );

    std::string fullpath;

    for (const auto& searchIt : _searchPathArray)
    {
        for (const auto& resolutionIt : _searchResolutionsOrderArray)
        {
            fullpath = this->getPathForFilename(newFilename, resolutionIt, searchIt);

            if (!fullpath.empty())
            {
                // Using the filename passed in as key.
                _fullPathCache.emplace(filename, fullpath);
                return fullpath;
            }

        }
    }

    if(isPopupNotify()){
        CCLOG("cocos2d: fullPathForFilename: No file found at %s. Possible missing file.", filename.c_str());
    }

    // The file wasn't found, return empty string.
    return "";
}

std::string FileUtils::fullPathFromRelativeFile(const std::string &filename, const std::string &relativeFile)
{
    return relativeFile.substr(0, relativeFile.rfind('/')+1) + getNewFilename(filename);
}

void FileUtils::setSearchResolutionsOrder(const std::vector<std::string>& searchResolutionsOrder)
{
    if (_searchResolutionsOrderArray == searchResolutionsOrder)
    {
        return;
    }

    bool existDefault = false;

    _fullPathCache.clear();
    _searchResolutionsOrderArray.clear();
    for(const auto& iter : searchResolutionsOrder)
    {
        std::string resolutionDirectory = iter;
        if (!existDefault && resolutionDirectory == "")
        {
            existDefault = true;
        }

        if (resolutionDirectory.length() > 0 && resolutionDirectory[resolutionDirectory.length()-1] != '/')
        {
            resolutionDirectory += "/";
        }

        _searchResolutionsOrderArray.push_back(resolutionDirectory);
    }

    if (!existDefault)
    {
        _searchResolutionsOrderArray.push_back("");
    }
}

void FileUtils::addSearchResolutionsOrder(const std::string &order,const bool front)
{
    std::string resOrder = order;
    if (!resOrder.empty() && resOrder[resOrder.length()-1] != '/')
        resOrder.append("/");

    if (front) {
        _searchResolutionsOrderArray.insert(_searchResolutionsOrderArray.begin(), resOrder);
    } else {
        _searchResolutionsOrderArray.push_back(resOrder);
    }
}

const std::vector<std::string>& FileUtils::getSearchResolutionsOrder() const
{
    return _searchResolutionsOrderArray;
}

const std::vector<std::string>& FileUtils::getSearchPaths() const
{
    return _searchPathArray;
}

const std::vector<std::string>& FileUtils::getOriginalSearchPaths() const
{
    return _originalSearchPaths;
}

void FileUtils::setWritablePath(const std::string& writablePath)
{
    _writablePath = writablePath;
}

const std::string& FileUtils::getDefaultResourceRootPath() const
{
    return _defaultResRootPath;
}

void FileUtils::setDefaultResourceRootPath(const std::string& path)
{
    if (_defaultResRootPath != path)
    {
        _fullPathCache.clear();
        _defaultResRootPath = path;
        if (!_defaultResRootPath.empty() && _defaultResRootPath[_defaultResRootPath.length()-1] != '/')
        {
            _defaultResRootPath += '/';
        }

        // Updates search paths
        setSearchPaths(_originalSearchPaths);
    }
}

void FileUtils::setSearchPaths(const std::vector<std::string>& searchPaths)
{
    bool existDefaultRootPath = false;
    _originalSearchPaths = searchPaths;

    _fullPathCache.clear();
    _searchPathArray.clear();

    for (const auto& path : _originalSearchPaths)
    {
        std::string prefix;
        std::string fullPath;

        if (!isAbsolutePath(path))
        { // Not an absolute path
            prefix = _defaultResRootPath;
        }
        fullPath = prefix + path;
        if (!path.empty() && path[path.length()-1] != '/')
        {
            fullPath += "/";
        }
        if (!existDefaultRootPath && path == _defaultResRootPath)
        {
            existDefaultRootPath = true;
        }
        _searchPathArray.push_back(fullPath);
    }

    if (!existDefaultRootPath)
    {
        //CCLOG("Default root path doesn't exist, adding it.");
        _searchPathArray.push_back(_defaultResRootPath);
    }
}

void FileUtils::addSearchPath(const std::string &searchpath,const bool front)
{
    std::string prefix;
    if (!isAbsolutePath(searchpath))
        prefix = _defaultResRootPath;

    std::string path = prefix + searchpath;
    if (!path.empty() && path[path.length()-1] != '/')
    {
        path += "/";
    }

    if (front) {
        _originalSearchPaths.insert(_originalSearchPaths.begin(), searchpath);
        _searchPathArray.insert(_searchPathArray.begin(), path);
    } else {
        _originalSearchPaths.push_back(searchpath);
        _searchPathArray.push_back(path);
    }
}

void FileUtils::setFilenameLookupDictionary(const ValueMap& filenameLookupDict)
{
    _fullPathCache.clear();
    _filenameLookupDict = filenameLookupDict;
}

void FileUtils::loadFilenameLookupDictionaryFromFile(const std::string &filename)
{
    const std::string fullPath = fullPathForFilename(filename);
    if (!fullPath.empty())
    {
        ValueMap dict = FileUtils::getInstance()->getValueMapFromFile(fullPath);
        if (!dict.empty())
        {
            ValueMap& metadata =  dict["metadata"].asValueMap();
            int version = metadata["version"].asInt();
            if (version != 1)
            {
                CCLOG("cocos2d: ERROR: Invalid filenameLookup dictionary version: %d. Filename: %s", version, filename.c_str());
                return;
            }
            setFilenameLookupDictionary( dict["filenames"].asValueMap());
        }
    }
}

std::string FileUtils::getFullPathForDirectoryAndFilename(const std::string& directory, const std::string& filename) const
{
    // get directory+filename, safely adding '/' as necessary
    std::string ret = directory;
    if (directory.size() && directory[directory.size()-1] != '/'){
        ret += '/';
    }
    ret += filename;

    // if the file doesn't exist, return an empty string
    if (!isFileExistInternal(ret)) {
        ret = "";
    }
    return ret;
}

bool FileUtils::isFileExist(const std::string& filename) const
{
    if (isAbsolutePath(filename))
    {
        return isFileExistInternal(filename);
    }
    else
    {
        std::string fullpath = fullPathForFilename(filename);
        if (fullpath.empty())
            return false;
        else
            return true;
    }
}

void FileUtils::isFileExist(const std::string& filename, std::function<void(bool)> callback)
{
    auto fullPath = fullPathForFilename(filename);
    performOperationOffthread([fullPath]() -> bool {
        return FileUtils::getInstance()->isFileExist(fullPath);
    }, std::move(callback));
}

bool FileUtils::isAbsolutePath(const std::string& path) const
{
    return (path[0] == '/');
}

bool FileUtils::isDirectoryExist(const std::string& dirPath) const
{
    CCASSERT(!dirPath.empty(), "Invalid path");

    if (isAbsolutePath(dirPath))
    {
        return isDirectoryExistInternal(dirPath);
    }

    // Already Cached ?
    auto cacheIter = _fullPathCache.find(dirPath);
    if( cacheIter != _fullPathCache.end() )
    {
        return isDirectoryExistInternal(cacheIter->second);
    }

    std::string fullpath;
    for (const auto& searchIt : _searchPathArray)
    {
        for (const auto& resolutionIt : _searchResolutionsOrderArray)
        {
            // searchPath + file_path + resourceDirectory
            fullpath = fullPathForFilename(searchIt + dirPath + resolutionIt);
            if (isDirectoryExistInternal(fullpath))
            {
                _fullPathCache.emplace(dirPath, fullpath);
                return true;
            }
        }
    }
    return false;
}

void FileUtils::isDirectoryExist(const std::string& fullPath, std::function<void(bool)> callback)
{
    CCASSERT(isAbsolutePath(fullPath), "Async isDirectoryExist only accepts absolute file paths");
    performOperationOffthread([fullPath]() -> bool {
        return FileUtils::getInstance()->isDirectoryExist(fullPath);
    }, std::move(callback));
}

void FileUtils::createDirectory(const std::string& dirPath, std::function<void(bool)> callback)
{
    performOperationOffthread([dirPath]() -> bool {
        return FileUtils::getInstance()->createDirectory(dirPath);
    }, std::move(callback));
}

void FileUtils::removeDirectory(const std::string& dirPath, std::function<void(bool)> callback)
{
    performOperationOffthread([dirPath]() -> bool {
        return FileUtils::getInstance()->removeDirectory(dirPath);
    }, std::move(callback));
}

void FileUtils::removeFile(const std::string &filepath, std::function<void (bool)> callback)
{
    auto fullPath = fullPathForFilename(filepath);
    performOperationOffthread([fullPath]() -> bool {
        return FileUtils::getInstance()->removeFile(fullPath);
    }, std::move(callback));
}

void FileUtils::renameFile(const std::string &path, const std::string &oldname, const std::string &name, std::function<void(bool)> callback)
{
    performOperationOffthread([path, oldname, name]() -> bool {
        return FileUtils::getInstance()->renameFile(path, oldname, name);
    }, std::move(callback));
                                
}

void FileUtils::renameFile(const std::string &oldfullpath, const std::string &newfullpath, std::function<void(bool)> callback)
{
    performOperationOffthread([oldfullpath, newfullpath]() {
        return FileUtils::getInstance()->renameFile(oldfullpath, newfullpath);
    }, std::move(callback));
}

void FileUtils::getFileSize(const std::string &filepath, std::function<void(long)> callback)
{
    auto fullPath = fullPathForFilename(filepath);
    performOperationOffthread([fullPath]() {
        return FileUtils::getInstance()->getFileSize(fullPath);
    }, std::move(callback));
}

void FileUtils::listFilesAsync(const std::string& dirPath, std::function<void(std::vector<std::string>)> callback) const
{
    auto fullPath = fullPathForFilename(dirPath);
    performOperationOffthread([fullPath]() {
        return FileUtils::getInstance()->listFiles(fullPath);
    }, std::move(callback));
}

void FileUtils::listFilesRecursivelyAsync(const std::string& dirPath, std::function<void(std::vector<std::string>)> callback) const
{
    auto fullPath = fullPathForFilename(dirPath);
    performOperationOffthread([fullPath]() {
        std::vector<std::string> retval;
        FileUtils::getInstance()->listFilesRecursively(fullPath, &retval);
        return retval;
    }, std::move(callback));
}

#if (CC_TARGET_PLATFORM == CC_PLATFORM_WIN32) || (CC_TARGET_PLATFORM == CC_PLATFORM_WINRT)
// windows os implement should override in platform specific FileUtiles class
bool FileUtils::isDirectoryExistInternal(const std::string& dirPath) const
{
    CCASSERT(false, "FileUtils not support isDirectoryExistInternal");
    return false;
}

bool FileUtils::createDirectory(const std::string& path)
{
    CCASSERT(false, "FileUtils not support createDirectory");
    return false;
}

bool FileUtils::removeDirectory(const std::string& path)
{
    CCASSERT(false, "FileUtils not support removeDirectory");
    return false;
}

bool FileUtils::removeFile(const std::string &path)
{
    CCASSERT(false, "FileUtils not support removeFile");
    return false;
}

bool FileUtils::renameFile(const std::string &oldfullpath, const std::string& newfullpath)
{
    CCASSERT(false, "FileUtils not support renameFile");
    return false;
}

bool FileUtils::renameFile(const std::string &path, const std::string &oldname, const std::string &name)
{
    CCASSERT(false, "FileUtils not support renameFile");
    return false;
}

std::string FileUtils::getSuitableFOpen(const std::string& filenameUtf8) const
{
    CCASSERT(false, "getSuitableFOpen should be override by platform FileUtils");
    return filenameUtf8;
}

long FileUtils::getFileSize(const std::string &filepath)
{
    CCASSERT(false, "getFileSize should be override by platform FileUtils");
    return 0;
}

std::vector<std::string> FileUtils::listFiles(const std::string& dirPath) const
{
    CCASSERT(false, "FileUtils not support listFiles");
    return std::vector<std::string>();
}

void FileUtils::listFilesRecursively(const std::string& dirPath, std::vector<std::string> *files) const
{
    CCASSERT(false, "FileUtils not support listFilesRecursively");
    return;
}

#else
#include "tinydir/tinydir.h"
// default implements for unix like os
#include <sys/types.h>
#include <errno.h>
#include <dirent.h>

// android doesn't have ftw.h
#if (CC_TARGET_PLATFORM != CC_PLATFORM_ANDROID)
#include <ftw.h>
#endif

bool FileUtils::isDirectoryExistInternal(const std::string& dirPath) const
{
    struct stat st;
    if (stat(dirPath.c_str(), &st) == 0)
    {
        return S_ISDIR(st.st_mode);
    }
    return false;
}

bool FileUtils::createDirectory(const std::string& path)
{
    CCASSERT(!path.empty(), "Invalid path");

    if (isDirectoryExist(path))
        return true;

    // Split the path
    size_t start = 0;
    size_t found = path.find_first_of("/\\", start);
    std::string subpath;
    std::vector<std::string> dirs;

    if (found != std::string::npos)
    {
        while (true)
        {
            subpath = path.substr(start, found - start + 1);
            if (!subpath.empty())
                dirs.push_back(subpath);
            start = found+1;
            found = path.find_first_of("/\\", start);
            if (found == std::string::npos)
            {
                if (start < path.length())
                {
                    dirs.push_back(path.substr(start));
                }
                break;
            }
        }
    }

    DIR *dir = NULL;

    // Create path recursively
    subpath = "";
    for (const auto& iter : dirs)
    {
        subpath += iter;
        dir = opendir(subpath.c_str());

        if (!dir)
        {
            // directory doesn't exist, should create a new one

            int ret = mkdir(subpath.c_str(), S_IRWXU | S_IRWXG | S_IRWXO);
            if (ret != 0 && (errno != EEXIST))
            {
                // current directory can not be created, sub directories can not be created too
                // should return
                return false;
            }
        }
        else
        {
            // directory exists, should close opened dir
            closedir(dir);
        }
    }
    return true;
}

namespace
{
#if (CC_TARGET_PLATFORM != CC_PLATFORM_ANDROID)
    int unlink_cb(const char *fpath, const struct stat *sb, int typeflag, struct FTW *ftwbuf)
    {
        int rv = remove(fpath);
        
        if (rv)
            perror(fpath);
        
        return rv;
    }
#endif
}

bool FileUtils::removeDirectory(const std::string& path)
{
#if !defined(CC_TARGET_OS_TVOS)

#if (CC_TARGET_PLATFORM != CC_PLATFORM_ANDROID)
    if (nftw(path.c_str(), unlink_cb, 64, FTW_DEPTH | FTW_PHYS) == -1)
        return false;
    else
        return true;
#else
    std::string command = "rm -r ";
    // Path may include space.
    command += "\"" + path + "\"";
    if (system(command.c_str()) >= 0)
        return true;
    else
        return false;
#endif // (CC_TARGET_PLATFORM != CC_PLATFORM_ANDROID)

#else
    return false;
#endif // !defined(CC_TARGET_OS_TVOS)
}

bool FileUtils::removeFile(const std::string &path)
{
    if (remove(path.c_str())) {
        return false;
    } else {
        return true;
    }
}

bool FileUtils::renameFile(const std::string &oldfullpath, const std::string &newfullpath)
{
    CCASSERT(!oldfullpath.empty(), "Invalid path");
    CCASSERT(!newfullpath.empty(), "Invalid path");

    int errorCode = rename(oldfullpath.c_str(), newfullpath.c_str());

    if (0 != errorCode)
    {
        CCLOGERROR("Fail to rename file %s to %s !Error code is %d", oldfullpath.c_str(), newfullpath.c_str(), errorCode);
        return false;
    }
    return true;
}

bool FileUtils::renameFile(const std::string &path, const std::string &oldname, const std::string &name)
{
    CCASSERT(!path.empty(), "Invalid path");
    std::string oldPath = path + oldname;
    std::string newPath = path + name;

    return this->renameFile(oldPath, newPath);
}

std::string FileUtils::getSuitableFOpen(const std::string& filenameUtf8) const
{
    return filenameUtf8;
}

long FileUtils::getFileSize(const std::string &filepath)
{
    CCASSERT(!filepath.empty(), "Invalid path");

    std::string fullpath = filepath;
    if (!isAbsolutePath(filepath))
    {
        fullpath = fullPathForFilename(filepath);
        if (fullpath.empty())
            return 0;
    }

    struct stat info;
    // Get data associated with "crt_stat.c":
    int result = stat(fullpath.c_str(), &info);

    // Check if statistics are valid:
    if (result != 0)
    {
        // Failed
        return -1;
    }
    else
    {
        return (long)(info.st_size);
    }
}

std::vector<std::string> FileUtils::listFiles(const std::string& dirPath) const
{
    std::vector<std::string> files;
    std::string fullpath = fullPathForFilename(dirPath);
    if (isDirectoryExist(fullpath))
    {
        tinydir_dir dir;
        std::string fullpathstr = fullpath;

        if (tinydir_open(&dir, &fullpathstr[0]) != -1)
        {
            while (dir.has_next)
            {
                tinydir_file file;
                if (tinydir_readfile(&dir, &file) == -1)
                {
                    // Error getting file
                    break;
                }
                std::string filepath = file.path;

                if (file.is_dir)
                {
                    filepath.append("/");
                }
                files.push_back(filepath);

                if (tinydir_next(&dir) == -1)
                {
                    // Error getting next file
                    break;
                }
            }
        }
        tinydir_close(&dir);
    }
    return files;
}

void FileUtils::listFilesRecursively(const std::string& dirPath, std::vector<std::string> *files) const
{
    std::string fullpath = fullPathForFilename(dirPath);
    if (isDirectoryExist(fullpath))
    {
        tinydir_dir dir;
        std::string fullpathstr = fullpath;

        if (tinydir_open(&dir, &fullpathstr[0]) != -1)
        {
            while (dir.has_next)
            {
                tinydir_file file;
                if (tinydir_readfile(&dir, &file) == -1)
                {
                    // Error getting file
                    break;
                }
                std::string fileName = file.name;

                if (fileName != "." && fileName != "..")
                {
                    std::string filepath = file.path;
                    if (file.is_dir)
                    {
                        filepath.append("/");
                        files->push_back(filepath);
                        listFilesRecursively(filepath, files);
                    }
                    else
                    {
                        files->push_back(filepath);
                    }
                }

                if (tinydir_next(&dir) == -1)
                {
                    // Error getting next file
                    break;
                }
            }
        }
        tinydir_close(&dir);
    }
}

#endif

//////////////////////////////////////////////////////////////////////////
// Notification support when getFileData from invalid file path.
//////////////////////////////////////////////////////////////////////////
static bool s_popupNotify = true;

void FileUtils::setPopupNotify(bool notify)
{
    s_popupNotify = notify;
}

bool FileUtils::isPopupNotify() const
{
    return s_popupNotify;
}

std::string FileUtils::getFileExtension(const std::string& filePath) const
{
    std::string fileExtension;
    size_t pos = filePath.find_last_of('.');
    if (pos != std::string::npos)
    {
        fileExtension = filePath.substr(pos, filePath.length());

        std::transform(fileExtension.begin(), fileExtension.end(), fileExtension.begin(), ::tolower);
    }

    return fileExtension;
}

void FileUtils::valueMapCompact(ValueMap& /*valueMap*/)
{
}

void FileUtils::valueVectorCompact(ValueVector& /*valueVector*/)
{
}

NS_CC_END