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#include "StudyFileReader.h"
#include "../dictionary/Dictionary.h"
#include "../version.h"
#include "../dictionary/CardPack.h"
#include "../dictionary/DicRecord.h"
#include <QMessageBox>
const QString StudyFileReader::MinSupportedStudyVersion = "1.0";
StudyFileReader::StudyFileReader( Dictionary* aDict ):
m_dict( aDict ), m_cardPack( NULL )
{
settings = StudySettings::inst();
}
bool StudyFileReader::read( QIODevice* aDevice )
{
setDevice( aDevice );
while( !atEnd() )
{
readNext();
if( isStartElement() )
{
if( name() == "study" )
{
readStudy();
return !error(); // readStudy() processes all situations
}
else
raiseError( Dictionary::tr("The file is not a study file.") );
}
}
return !error();
}
void StudyFileReader::readStudy()
{
Q_ASSERT( isStartElement() && name() == "study" );
m_studyVersion = attributes().value( "version" ).toString();
if(m_studyVersion >= MinSupportedStudyVersion)
readStudyCurrentVersion();
else
QMessageBox::warning( NULL, Dictionary::tr("Unsupported format"),
Dictionary::tr("The study file uses unsupported format %1.\n"
"The minimum supported version is %2" )
.arg( m_studyVersion )
.arg( MinSupportedStudyVersion ) );
}
void StudyFileReader::readUnknownElement()
{
Q_ASSERT( isStartElement() );
while( !atEnd() )
{
readNext();
if( isEndElement() )
break;
if( isStartElement() )
readUnknownElement();
}
}
void StudyFileReader::readStudyCurrentVersion()
{
Q_ASSERT( isStartElement() && name() == "study" );
while( !atEnd() )
{
readNext();
if( isEndElement() )
break;
if( isStartElement() )
{
if( name() == "pack" )
readPack();
else
readUnknownElement();
}
}
if(m_studyVersion != STUDY_VERSION)
m_dict->setStudyModified();
}
void StudyFileReader::readPack()
{
Q_ASSERT( isStartElement() && name() == "pack" );
QString id = attributes().value( "id" ).toString();
m_cardPack = m_dict->cardPack( id );
if( !m_cardPack )
{
skipCurrentElement();
return;
}
m_cardPack->setReadingStudyFile(true);
while( !atEnd() )
{
readNext();
if( isEndElement() )
break;
if( isStartElement() )
{
if( name() == "cur-card" )
{
Q_ASSERT( m_cardPack->curCardName().isEmpty() );
QString curCard = attributes().value( "id" ).toString();
if( !curCard.isEmpty() )
m_cardPack->setCurCard( curCard );
readNext(); // read end of 'cur-card' element
Q_ASSERT( isEndElement() );
}
else if( name() == "c" )
readC();
else
readUnknownElement();
}
}
m_cardPack->setReadingStudyFile(false);
}
void StudyFileReader::readC()
{
Q_ASSERT( isStartElement() && name() == "c" && m_cardPack );
m_cardId = attributes().value( "id" ).toString();
while( !atEnd() )
{
readNext();
if( isEndElement() )
break;
if( isStartElement() )
{
if( name() == "r" )
readR();
else
readUnknownElement();
}
}
}
void StudyFileReader::readR()
{
Q_ASSERT( isStartElement() && name() == "r" );
StudyRecord study;
bool ok; // for number conversions
QString date = attributes().value( "d" ).toString();
study.date = QDateTime::fromString( date, Qt::ISODate );
QString grade = attributes().value( "g" ).toString();
study.grade = grade.toInt( &ok );
if(m_studyVersion < "1.4" && study.grade < 3)
study.grade++;
QString easiness = attributes().value( "e" ).toString();
study.easiness = easiness.toFloat( &ok );
QString time;
time = attributes().value( "t" ).toString(); // obsolete parameter
if(!time.isEmpty())
{
study.recallTime = time.toFloat( &ok );
Q_ASSERT( ok );
}
time = attributes().value( "rt" ).toString();
if(!time.isEmpty())
{
study.recallTime = time.toFloat( &ok );
if( study.recallTime > StudyRecord::MaxAnswerTime )
study.recallTime = StudyRecord::MaxAnswerTime;
Q_ASSERT( ok );
}
time = attributes().value( "at" ).toString();
if(!time.isEmpty())
{
study.answerTime = time.toFloat( &ok );
if( study.answerTime > StudyRecord::MaxAnswerTime )
study.answerTime = StudyRecord::MaxAnswerTime;
Q_ASSERT( ok );
}
QString interval = attributes().value( "i" ).toString();
QString level = attributes().value( "l" ).toString();
if(!interval.isEmpty() && interval != "0")
{
study.interval = interval.toFloat();
if(!level.isEmpty())
study.level = level.toInt();
else
study.level = StudyRecord::Repeating;
if(m_studyVersion == "1.4")
fixupIncorrectGradeIn1_4(study);
}
else // delayed card
{
QString cardsStr = attributes().value( "c" ).toString();
if( !cardsStr.isEmpty() )
{
int cardInterval = cardsStr.toInt();
if(cardInterval <= 7)
study.interval = settings->unknownInterval;
else
study.interval = settings->incorrectInterval;
}
else
study.interval = 0;
study.level = StudyRecord::ShortLearning;
}
m_cardPack->addStudyRecord( m_cardId, study );
readElementText(); // read until element end
}
void StudyFileReader::fixupIncorrectGradeIn1_4(StudyRecord& study)
{
if(!(study.level == StudyRecord::ShortLearning &&
study.grade <= 3))
return;
if(equalDouble(study.interval, settings->unknownInterval))
study.grade = StudyRecord::Unknown;
else if(equalDouble(study.interval, settings->incorrectInterval))
study.grade = StudyRecord::Incorrect;
}
bool StudyFileReader::equalDouble(double a, double b)
{
static const double Dif = 0.0001;
return fabs(a - b) < Dif;
}
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