nextcloud-desktop/shell_integration/windows/OCUtil/ParserUtil.cpp

/**
 *  Copyright (c) 2000-2013 Liferay, Inc. All rights reserved.
 *  
 *  This library is free software; you can redistribute it and/or modify it under
 *  the terms of the GNU Lesser General Public License as published by the Free
 *  Software Foundation; either version 2.1 of the License, or (at your option)
 *  any later version.
 *  
 *  This library is distributed in the hope that it will be useful, but WITHOUT
 *  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 *  FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
 *  details.
 */

#include "ParserUtil.h"
#include "UtilConstants.h"

#include <iostream>

using namespace std;

bool ParserUtil::GetItem(const wchar_t* item, const wstring* message, wstring* result)
{
    size_t start = message->find(item, 0);

    if(start == string::npos)
    {
        return false;
    }

    size_t end = message->find(COLON, start);

    if(end == string::npos)
    {
        return false;
    }

    //Move to next character after :
    end += 1;

    wchar_t c = message->at(end);

    //Move to the next character, which is the start of the value
    end += 1;
    
    if(c == '[')
    {
        return GetList(end - 1, message, result);
    }
    else
    {
        return GetValue(end, message, result);
    }
}

bool ParserUtil::GetList(size_t start, const wstring* message, wstring* result)
{
    size_t end = start + 1;

    int openBraceCount = 1;

    while(openBraceCount > 0)
    {
        size_t closeBraceLocation = message->find(CLOSE_BRACE, end);
        size_t openBraceLocation = message->find(OPEN_BRACE, end);

        if(closeBraceLocation < openBraceLocation)
        {
            openBraceCount--;
            end = closeBraceLocation + 1;
        }
        else if(openBraceLocation < closeBraceLocation)
        {
            openBraceCount++;
            end = openBraceLocation + 1;
        }

    }
    
    size_t length = end - start;

    return GetString(start, end, message, result);
}

size_t ParserUtil::GetNextStringItemInList(const wstring* message, size_t start, wstring* result)
{
    size_t end = string::npos;
    size_t commaLocation = message->find(COMMA, start);

    if(commaLocation == string::npos)
    {
        end = message->find(CLOSE_BRACE, start);
        if(end == string::npos)
        {
            end = message->length();
        }
        else
        {
            end = end - 1;
        }
    }
    else
    {
        end = commaLocation - 1;
    }

    if(!GetString(start + 2, end, message, result))
    {
        return string::npos;
    }

    return end + 2;
}

size_t ParserUtil::GetNextOCItemInList(const wstring* message, size_t start, wstring* result)
{
    size_t end = message->find(OPEN_CURLY_BRACE, start) + 1;

    int openBraceCount = 1;

    while(openBraceCount > 0)
    {
        size_t closeBraceLocation = message->find(CLOSE_CURLY_BRACE, end);
        size_t openBraceLocation = message->find(OPEN_CURLY_BRACE, end);

        if(closeBraceLocation < openBraceLocation)
        {
            openBraceCount--;
            end = closeBraceLocation + 1;
        }
        else if(openBraceLocation < closeBraceLocation)
        {
            openBraceCount++;
            end = openBraceLocation + 1;
        }
    }

    size_t length = end - start;

    if(!GetString(start, end, message, result))
    {
        return string::npos;
    }

    return end;
}

bool ParserUtil::GetValue(size_t start, const wstring* message, wstring* result)
{
    if(message->at(start - 1) == '\"')
    {
        size_t end = message->find(QUOTE, start);
        return GetString(start, end, message, result);
    }
    else
    {
        start = start - 1;

        size_t end = message->find(COMMA, start);
        
        result->append(message->substr(start, end-start));
    }

    return true;
}

bool ParserUtil::GetString(size_t start, size_t end, const wstring* message, wstring* result)
{
    if(end == string::npos)
    {
        return false;
    }

    size_t length = end - start;

    if(length > 0)
    {
        result->append(message->substr(start, length));
    }
    else
    {
        result->append(L"");
    }

    
    return true;
}

bool ParserUtil::IsList(wstring* message)
{
    wchar_t c = message->at(0);
    
    if(c == '[')
    {
        return true;
    }

    return false;
}

bool ParserUtil::ParseJsonList(wstring* message, vector<wstring*>* items)
{

    size_t currentLocation = message->find(OPEN_BRACE, 0);

    while(currentLocation < message->size())
    {
        wstring* item = new wstring();

        currentLocation = ParserUtil::GetNextStringItemInList(message, currentLocation, item);

        if(currentLocation == string::npos)
        {
            return false;
        }

        items->push_back(item);
    }

    return true;
}

bool ParserUtil::ParseOCList(wstring* message, vector<wstring*>* items)
{

    size_t currentLocation = message->find(OPEN_CURLY_BRACE, 0);

    while(currentLocation < message->size())
    {
        wstring* item = new wstring();

        currentLocation = ParserUtil::GetNextOCItemInList(message, currentLocation, item);

        if(currentLocation == string::npos)
        {
            return false;
        }

        items->push_back(item);
    }

    return true;
}

bool ParserUtil::ParseOCMessageList(wstring* message, vector<OCMessage*>* messages)
{
    vector<wstring*>* items = new vector<wstring*>();

    if(!ParseOCList(message, items))
    {
        return false;
    }

    for(vector<wstring*>::iterator it = items->begin(); it != items->end(); it++)
    {
        wstring* temp = *it;

        OCMessage* message = new OCMessage();
        message->InitFromMessage(temp);

        messages->push_back(message);
    }

    return true;
}

bool ParserUtil::SerializeList(std::vector<std::wstring>* list, std::wstring* result, bool escapeQuotes)
{
    if(result == 0)
    {
        return false;
    }

    result->append(OPEN_BRACE);

    for(vector<wstring>::iterator it = list->begin(); it != list->end(); it++)
    {
        wstring value = *it;

        if(escapeQuotes)
        {
            result->append(BACK_SLASH);
        }

        result->append(QUOTE);
        result->append(value.c_str());

        if(escapeQuotes)
        {
            result->append(BACK_SLASH);
        }

        result->append(QUOTE);
        result->append(COMMA);
    }

    //Erase last comma
    result->erase(result->size() - 1, 1);

    result->append(CLOSE_BRACE);

    return true;
}

bool ParserUtil::SerializeMessage(std::map<std::wstring*, std::wstring*>* arguments, std::wstring* result, bool escapeQuotes)
{
    if(result == 0)
    {
        return false;
    }

    result->append(OPEN_CURLY_BRACE);

    for(map<wstring*, wstring*>::iterator it = arguments->begin(); it != arguments->end(); it++)
    {
        wstring key = *it->first;
        wstring value = *it->second;

        if(escapeQuotes)
        {
            result->append(BACK_SLASH);
        }

        result->append(QUOTE);
        result->append(key.c_str());

        if(escapeQuotes)
        {
            result->append(BACK_SLASH);
        }

        result->append(QUOTE);
        result->append(COLON);
        result->append(value.c_str());
        result->append(COMMA);
    }

    //Erase last comma
    result->erase(result->size() - 1, 1);

    result->append(CLOSE_CURLY_BRACE);

    return true;
}

bool ParserUtil::SerializeMessage(OCMessage* OCMessage, std::wstring* result)
{
    if(result == 0)
    {
        return false;
    }

    result->append(OPEN_CURLY_BRACE);

    result->append(QUOTE);
    result->append(COMMAND);
    result->append(QUOTE);

    result->append(COLON);

    result->append(QUOTE);
    result->append(OCMessage->GetCommand()->c_str());
    result->append(QUOTE);

    result->append(COMMA);
    
    result->append(QUOTE);
    result->append(VALUE);
    result->append(QUOTE);

    result->append(COLON);
    
    if(!IsList(OCMessage->GetValue()))
    {
        result->append(QUOTE);
    }
    
    result->append(OCMessage->GetValue()->c_str());
    
    if(!IsList(OCMessage->GetValue()))
    {
        result->append(QUOTE);
    }

    result->append(CLOSE_CURLY_BRACE);

    return true;
}