ConfigEditor.cpp

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//SpikeStream includes
#include "ConfigEditor.h"
#include "SpikeStreamException.h"
#include "SpikeStreamIOException.h"
#include "Util.h"
using namespace spikestream;

//Qt includes
#include <QDebug>
#include <QTextStream>
#include <QCoreApplication>


ConfigEditor::ConfigEditor(){
        //Get root directory.
        rootDirectory = Util::getRootDirectory();
}


ConfigEditor::~ConfigEditor(){
}


/*----------------------------------------------------------*/
/*-----                 PUBLIC METHODS                 -----*/
/*----------------------------------------------------------*/

void ConfigEditor::setConfigParameters(QHash<QString, QString> newParamMap){
        /* Make sure that there is a config file already by attempting to copy from the template
           This function will not overwrite an existing config file */
        QFile::copy (rootDirectory + "/spikestream.config.template", rootDirectory + "/spikestream.config");

        //Create config file
        QFile configFile(rootDirectory + "/spikestream.config");
        if(!configFile.exists())
                throw SpikeStreamIOException("Cannot find config file at location: " + rootDirectory + "/spikestream.config");

        //Load the config file into a string
        QString configFileStr;
        if (!configFile.open(QIODevice::ReadOnly | QIODevice::Text))
                throw SpikeStreamIOException("Cannot open file for reading: " + configFile.fileName());

        QTextStream in(&configFile);
        QString line;
        while (!in.atEnd()) {
                line = in.readLine() + "\n";
                setParameter(newParamMap, line);
                configFileStr += line;
        }
        configFile.close();

        //Write the string back to the file with the modified parameters
        if( !configFile.open( QIODevice::WriteOnly | QIODevice::Text ) )
                throw SpikeStreamIOException("Cannot open file for writing: " + configFile.fileName());

        QTextStream out( &configFile );
        out<<configFileStr;
        configFile.close();

}


/*----------------------------------------------------------*/
/*-----                PRIVATE METHODS                 -----*/
/*----------------------------------------------------------*/

void ConfigEditor::setParameter(QHash<QString, QString>& paramMap, QString& configFileLine){
        //Do nothing if line is a comment or is empty
        if(configFileLine.isEmpty() || configFileLine.at(0) == '#')
                return;

        //Get the parameter for this line
        QString paramName = configFileLine.section("=", 0, 0, QString::SectionSkipEmpty).trimmed();
        for(QHash<QString, QString>::iterator iter = paramMap.begin(); iter != paramMap.end(); ++iter){
                if(iter.key() == paramName){
                        configFileLine = paramName + " = " + iter.value() + "\n";
                        return;
                }
        }
}