/*

* Copyright (c) 2008 Nokia Corporation and/or its subsidiary(-ies).

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of "Eclipse Public License v1.0"

* which accompanies this distribution, and is available

* at the URL "http://www.eclipse.org/legal/epl-v10.html".

*

* Initial Contributors:

* Nokia Corporation - initial contribution.

*

* Contributors:

*

* Description:  JavaCommonUtils

*

*/

#include <iostream>

#include <sstream>

#include <vector>

#include <string.h>

#include <openssl/bio.h>

#include <openssl/evp.h>

#include <openssl/buffer.h>

#include "logger.h"

#include "javacommonutils.h"

#include "exceptionbase.h"

#include "convertutf.h"

using namespace java::util;

OS_EXPORT int JavaCommonUtils::stringToInt(const std::string& str)

{

//    JELOG2(EUtils);

//    value = boost::lexical_cast<int>( str );

    std::istringstream iss(str);

    int value = -1;

    if (!(iss >> value))

    {

        std::string errorStr = "Not able to convert to integer: ";

        errorStr.append(str);

        throw ExceptionBase(errorStr, __FILE__, __FUNCTION__, __LINE__);

    }

    return value;

}

OS_EXPORT long long JavaCommonUtils::stringToLongLong(const std::string& str)

{

//  JELOG2(EUtils);

    std::istringstream iss(str);

    long long value = -1LL;

    if (!(iss >> value))

    {

        std::string errorStr = "Not able to convert to 'long long': ";

        errorStr.append(str);

        throw ExceptionBase(errorStr, __FILE__, __FUNCTION__, __LINE__);

    }

    return value;

}

OS_EXPORT std::string JavaCommonUtils::intToString(const int& value)

{

//    JELOG2(EUtils);

//    str = boost::lexical_cast<std::string>( value );

    std::ostringstream oss;

    oss<<value;

    return oss.str();

}

OS_EXPORT std::string JavaCommonUtils::longLongToString(const long long& value)

{

//  JELOG2(EUtils);

    std::ostringstream oss;

    oss<<value;

    return oss.str();

}

OS_EXPORT int JavaCommonUtils::wstringToInt(const std::wstring& str)

{

//    JELOG2(EUtils);

    //throw ExceptionBase("JavaCommonUtils::wstringToInt not supported yet", __FILE__, __FUNCTION__, __LINE__);

//    value = boost::lexical_cast<int>( str );

    std::wistringstream iss(str);

    int value = -1;

    if (!(iss >> value))

    {

        std::string errorStr = "Not able to convert wstring to integer";

        throw ExceptionBase(errorStr, __FILE__, __FUNCTION__, __LINE__);

    }

    return value;

}

OS_EXPORT std::wstring JavaCommonUtils::intToWstring(const int& value)

{

//    JELOG2(EUtils);

    //throw ExceptionBase("JavaCommonUtils::wstringToInt not supported yet", __FILE__, __FUNCTION__, __LINE__);

//  return boost::lexical_cast<std::wstring>( value );

    std::wostringstream oss;

    oss<<value;

    return oss.str();

}

OS_EXPORT std::wstring JavaCommonUtils::longLongToWstring(const long long& value)

{

//  JELOG2(EUtils);

    std::wostringstream oss;

    oss<<value;

    return oss.str();

}

OS_EXPORT long long JavaCommonUtils::wstringToLongLong(const std::wstring& str)

{

//  JELOG2(EUtils);

    std::wistringstream iss(str);

    long long value;

    if (!(iss >> value))

    {

        std::string errorStr = "Not able to convert wstring to 'long long'";

        throw ExceptionBase(errorStr, __FILE__, __FUNCTION__, __LINE__);

    }

    return value;

}

OS_EXPORT std::wstring JavaCommonUtils::utf8ToWstring(const char* chr)

{

//    JELOG2(EUtils);

    if (chr==0)

    {

        throw ExceptionBase("Null argument", __FILE__, __FUNCTION__, __LINE__);

    }

    size_t widesize = strlen(chr);

    if (sizeof(wchar_t) == 2)

    {

        wchar_t* widestringnative = new wchar_t[widesize+3];

        const UTF8* sourcestart = reinterpret_cast<const UTF8*>(chr);

        const UTF8* sourceend = sourcestart + widesize;

        UTF16* targetstart = reinterpret_cast<UTF16*>(widestringnative);

        UTF16* targetend = targetstart + widesize + 3;

        ConversionResult res =

            ConvertUTF8toUTF16(&sourcestart, sourceend, &targetstart, targetend, lenientConversion);

        if (res != conversionOK)

        {

            delete [] widestringnative;

            std::string errorStr = "Not able to convert utf8 to utf16 wstring";

            throw ExceptionBase(errorStr, __FILE__, __FUNCTION__, __LINE__);

        }

        *targetstart = 0;  // add terminating null character

        std::wstring resultstring(widestringnative);

        delete [] widestringnative;

        return resultstring;

    }

    else if (sizeof(wchar_t) == 4)

    {

        wchar_t* widestringnative = new wchar_t[widesize+3];

        const UTF8* sourcestart = reinterpret_cast<const UTF8*>(chr);

        const UTF8* sourceend = sourcestart + widesize;

        UTF32* targetstart = reinterpret_cast<UTF32*>(widestringnative);

        UTF32* targetend = targetstart + widesize + 3;

        ConversionResult res =

            ConvertUTF8toUTF32(&sourcestart, sourceend, &targetstart, targetend, lenientConversion);

        if (res != conversionOK)

        {

            delete [] widestringnative;

            std::string errorStr = "Not able to convert utf8 to utf32 wstring";

            throw ExceptionBase(errorStr, __FILE__, __FUNCTION__, __LINE__);

        }

        *targetstart = 0; // add terminating null character

        std::wstring resultstring(widestringnative);

        delete [] widestringnative;

        return resultstring;

    }

    else

    {

        int len = strlen(chr);

        wchar_t* dest = new wchar_t[len+1];

        int i;

        for (i = 0; i < len; i++)

        {

            dest[i] = chr[i];

        }

        dest[i] = 0;

        std::wstring result = std::wstring(dest);

        delete [] dest;

        return result;

    }

}

OS_EXPORT char* JavaCommonUtils::wstringToUtf8(const std::wstring& str)

{

    size_t widesize = str.length();

    if (sizeof(wchar_t) == 2)

    {

        size_t utf8size = 3 * widesize + 3;

        // should be large enough to contain the conversion always

        char* utf8stringnative = new char[utf8size];

        const UTF16* sourcestart = reinterpret_cast<const UTF16*>(str.c_str());

        const UTF16* sourceend = sourcestart + widesize;

        UTF8* targetstart = reinterpret_cast<UTF8*>(utf8stringnative);

        UTF8* targetend = targetstart + utf8size;

        ConversionResult res =

            ConvertUTF16toUTF8(&sourcestart, sourceend, &targetstart, targetend, lenientConversion);

        if (res != conversionOK)

        {

            delete [] utf8stringnative;

            std::string errorStr = "Not able to convert utf16 wstring to utf8";

            throw ExceptionBase(errorStr, __FILE__, __FUNCTION__, __LINE__);

        }

        *targetstart = 0;

        return utf8stringnative;

    }

    else if (sizeof(wchar_t) == 4)

    {

        size_t utf8size = 4 * widesize + 3;

        // should be large enough to contain the conversion always

        char* utf8stringnative = new char[utf8size];

        const UTF32* sourcestart = reinterpret_cast<const UTF32*>(str.c_str());

        const UTF32* sourceend = sourcestart + widesize;

        UTF8* targetstart = reinterpret_cast<UTF8*>(utf8stringnative);

        UTF8* targetend = targetstart + utf8size;

        ConversionResult res =

            ConvertUTF32toUTF8(&sourcestart, sourceend, &targetstart, targetend, lenientConversion);

        if (res != conversionOK)

        {

            delete [] utf8stringnative;

            std::string errorStr = "Not able to convert utf32 wstring to utf8";

            throw ExceptionBase(errorStr, __FILE__, __FUNCTION__, __LINE__);

        }

        *targetstart = 0;

        return utf8stringnative;

    }

    else

    {

        char* chr = new char[str.size()+1];

        sprintf(chr,"%ls",str.c_str());

        return chr;

    }

}

OS_EXPORT void JavaCommonUtils::trimWstring(std::wstring& aStr,

        const wchar_t& aStrippedChar)

{

    if (aStr.empty())

        return;

    std::string::size_type const first = aStr.find_first_not_of(aStrippedChar);

    std::string::size_type const second = aStr.find_last_not_of(aStrippedChar);

    aStr = aStr.substr(first,second-first+1);

}

OS_EXPORT std::string JavaCommonUtils::base64encode(const std::string& aData)

{

    BIO* b64  = BIO_new(BIO_f_base64());

    if (NULL == b64)

    {

        return "";

    }

    BIO_set_flags(b64, BIO_FLAGS_BASE64_NO_NL);

    BIO* bmem = BIO_new(BIO_s_mem());

    b64 = BIO_push(b64, bmem);

    BIO_write(b64, aData.c_str(), aData.length());

    BIO_flush(b64);

    BUF_MEM* bptr;

    BIO_get_mem_ptr(b64, &bptr);

    std::string result;

    result.insert(0, bptr->data, bptr->length);

    BIO_free_all(b64);

    return result;

}

OS_EXPORT std::wstring JavaCommonUtils::wbase64encode(const std::wstring& aData)

{

    BIO* b64  = BIO_new(BIO_f_base64());

    if (NULL == b64)

    {

        return L"";

    }

    BIO_set_flags(b64, BIO_FLAGS_BASE64_NO_NL);

    BIO* bmem = BIO_new(BIO_s_mem());

    b64 = BIO_push(b64, bmem);

    BIO_write(b64, aData.c_str(), aData.length() * 2);

    BIO_flush(b64);

    BUF_MEM* bptr;

    BIO_get_mem_ptr(b64, &bptr);

    std::wstring result;

    // convert each char to wchar

    for (int i = 0; i < bptr->length; i++)

    {

        result.push_back((wchar_t)*(bptr->data + i));

    }

    BIO_free_all(b64);

    return result;

}

OS_EXPORT std::string JavaCommonUtils::base64decode(const std::string& aData)

{

    BIO* b64  = BIO_new(BIO_f_base64());

    if (NULL == b64)

    {

        return "";

    }

    BIO_set_flags(b64, BIO_FLAGS_BASE64_NO_NL);

    BIO* bmem = BIO_new_mem_buf(

                    const_cast<char*>(aData.c_str()), aData.length());

    bmem = BIO_push(b64, bmem);

    char* buf = new char[aData.length()];

    int olen = BIO_read(bmem, buf, aData.length());

    std::string result;

    result.insert(0, buf, olen);

    BIO_free_all(bmem);

    delete[] buf;

    return result;

}

OS_EXPORT std::wstring JavaCommonUtils::percentDecode(const std::wstring& str)

{

    const std::wstring percent(L"%");

    std::string::size_type idx = str.find(percent);

    std::string::size_type cur = 0;

    std::wstring res;

    std::string convBuf;

    while (idx != std::string::npos)

    {

        // Add all characters before % sequence to final result string

        if ((idx - cur) > 0)

        {

            res.append(str.substr(cur, (idx - cur)));

        }

        // Decode all percent encoded chars in this sequence.

        do

        {

            char ch = decodeOnePercentSeq(str.at(idx + 1), str.at(idx + 2));

            // Add one UTF-8 value in this sequence to the buffer that will

            // be converter to UTF-16

            convBuf.append(&ch, 1);

            cur = idx + 3;

            idx = str.find(percent, cur);

        }

        while (idx == cur);

        // Now convert all UTF-8 values in buffer to UTF-16 and add result

        // to the final result string

        res.append(utf8ToWstring(convBuf.c_str()));

        convBuf.clear();

    }

    // Add characters after last % sequence if any

    res.append(str.substr(cur, str.length() - cur));

    return res;

}

char JavaCommonUtils::decodeOnePercentSeq(wchar_t first, wchar_t sec)

{

    // Handle one encoded %XY

    char decodedCh = 0;

    wchar_t ch = first;

    if ((ch >= '0') && (ch <= '9'))

    {

        decodedCh = (ch - '0') * 16;

    }

    else if ((ch >= 'A') && (ch <= 'F'))

    {

        decodedCh = ((ch - 'A') + 10) * 16;

    }

    else if ((ch >= 'a') && (ch <= 'f'))

    {

        decodedCh = ((ch - 'a') + 10) * 16;

    }

    else

    {

        std::string errorStr = "Illegal % encoding";

        throw ExceptionBase(errorStr, __FILE__, __FUNCTION__, __LINE__);

    }

    ch = sec;

    if ((ch >= '0') && (ch <= '9'))

    {

        decodedCh += (ch - '0');

    }

    else if ((ch >= 'A') && (ch <= 'F'))

    {

        decodedCh += (ch - 'A') + 10;

    }

    else if ((ch >= 'a') && (ch <= 'f'))

    {

        decodedCh += (ch - 'a') + 10;

    }

    else

    {

        std::string errorStr = "Illegal % encoding";

        throw ExceptionBase(errorStr, __FILE__, __FUNCTION__, __LINE__);

    }

    return decodedCh;

}