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#include "DicCsvReader.h"
#include "Dictionary.h"
#include "CardPack.h"
#include "DicRecord.h"
DicCsvReader::DicCsvReader( Dictionary* aDict ):
m_dict( aDict )
{
}
DicCsvReader::DicCsvReader():
m_dict( NULL )
{
}
QFile::FileError DicCsvReader::readDict( const QString aCsvFilePath, const CsvImportData& aImportData )
{
if( !m_dict )
return QFile::NoError;
initData( aImportData );
// Erase dictionary content
m_dict->clearFieldPackConfig();
if( m_dict->entriesNum() > 0 )
m_dict->removeRecords( 0, m_dict->entriesNum() );
QFile file( aCsvFilePath );
if( !file.open( QIODevice::ReadOnly | QFile::Text ) ) // \r\n --> \n
return file.error();
QTextStream inStream( &file );
inStream.setCodec( m_params.textCodec );
// Ignore first rows
int rowNum = 1;
while( !inStream.atEnd() && rowNum++ < m_params.fromLine )
inStream.readLine();
int fieldsNum = readLines( inStream );
file.close();
// Add entries to dictionary
foreach( DicRecord* entry, m_entries )
m_dict->addRecord(entry);
// Name nameless fields and create dictionary fields
for( int i = 0; i < fieldsNum; i++ )
{
QString name = m_fieldNames.value( i );
if( name.isEmpty() )
name = QString::number( i+1 );
m_dict->addField( name );
}
// Create packs
CardPack* pack;
QList<const Field*> ansFields;
pack = new CardPack( m_dict );
pack->setQstField( m_dict->field(0) );
ansFields << m_dict->field(1);
for( int i = 2; i < m_dict->fieldsNum(); i++ )
ansFields << m_dict->field(i);
pack->setAnsFields( ansFields );
m_dict->addCardPack( pack );
ansFields.clear();
pack = new CardPack( m_dict );
pack->setQstField( m_dict->field(1) );
ansFields << m_dict->field(0);
for( int i = 2; i < m_dict->fieldsNum(); i++ )
ansFields << m_dict->field(i);
pack->setAnsFields( ansFields );
m_dict->addCardPack( pack );
return QFile::NoError;
}
// The read field names are returned with fieldNames().
QList<DicRecord*> DicCsvReader::readEntries( QString aCsvEntries, const CsvImportData& aImportData )
{
initData( aImportData );
QTextStream inStream( &aCsvEntries );
readLines( inStream );
if( !m_fieldNames.empty() )
return m_entries;
else
return QList<DicRecord*>(); /* If no required header, they are not real entries.
* When pasting, this text cannot be parsed and must be ignored. */
}
void DicCsvReader::initData( const CsvImportData& aImportData )
{
m_params = aImportData;
// Construct regexp for the separators
QString fieldSepRxStr;
switch( m_params.fieldSeparationMode )
{
case EFieldSeparatorAnyCharacter:
fieldSepRxStr = QString("[") + m_params.fieldSeparators + "]";
break;
case EFieldSeparatorAnyCombination:
fieldSepRxStr = QString("[") + m_params.fieldSeparators + "]+";
break;
case EFieldSeparatorExactString:
fieldSepRxStr = m_params.fieldSeparators;
break;
}
m_fieldSepRx = QRegExp( fieldSepRxStr );
QChar delim = m_params.textDelimiter;
m_chunkEndRx = QRegExp( QString("(") + fieldSepRxStr + "|" + delim + ")" ); // End of text chunk
m_singleDelimiterRx = QRegExp( QString("([^") + delim + "]|^)" + delim + "([^" + delim + "]|$)" ); // Single text delimiter
}
int DicCsvReader::readLines( QTextStream& aInStream )
{
QString line;
// Read field names from the header
m_fieldNames.clear();
if( m_params.firstLineIsHeader && !aInStream.atEnd() )
{
line = aInStream.readLine();
if( line.startsWith( m_params.commentChar ) )
line.remove( m_params.commentChar );
m_fieldNames = readFields( line.trimmed() );
}
// Read lines and create entries
int fieldsNum = 0;
m_entries.clear();
while( !aInStream.atEnd() )
{
line = aInStream.readLine();
QStringList fields = readFields( line.trimmed() );
DicRecord* entry = new DicRecord();
for( int i = 0; i < fields.size(); i++ )
{
QString name = m_fieldNames.value( i, QString::number( i+1 ) );
QString field = fields.value( i );
entry->setField( name, field );
}
m_entries << entry; // Add even empty entries (without fields)
if( fields.size() > fieldsNum )
fieldsNum = fields.size();
}
return fieldsNum;
}
QStringList DicCsvReader::readFields( const QString aCsvLine )
{
QChar comment = m_params.commentChar;
if( !comment.isNull() && aCsvLine.startsWith( comment ) )
return QStringList(); // FUTURE FEATURE: read and mark as disabled
QChar delim = m_params.textDelimiter;
QStringList fields;
int curPos = 0;
QString curText;
while( curPos < aCsvLine.length() )
{
QChar curChar = aCsvLine[curPos];
if( curChar == delim ) // Text delimiter - Process the text until the next delimiter
{
int quoteEnd = aCsvLine.indexOf( m_singleDelimiterRx, curPos + 1 );
if( quoteEnd == -1) // End of line
quoteEnd = aCsvLine.length();
curText += aCsvLine.mid( curPos+1, quoteEnd-curPos );
curPos = quoteEnd + 2; // move beyond the delimiter
}
else if( m_fieldSepRx.indexIn( aCsvLine, curPos ) == curPos ) // Field separator - End of field
{
int sepLength = m_fieldSepRx.matchedLength();
curPos += sepLength;
fields << unescapeString( curText.trimmed() );
curText.clear();
}
else // Chunk of normal text. Process until next field separator or text delimiter.
{
int chunkEnd = aCsvLine.indexOf( m_chunkEndRx, curPos );
if( chunkEnd == -1 ) // End of line
chunkEnd = aCsvLine.length();
curText += aCsvLine.mid( curPos, chunkEnd-curPos );
curPos = chunkEnd;
}
}
if( !curText.isEmpty() ) // last Field
fields << unescapeString( curText.trimmed() );
if( m_params.colsToImport > 0 ) // Take only needed imported fields
fields = fields.mid( 0, m_params.colsToImport );
return fields;
}
/**
* Replaces double delimiters with one delimiter
*/
QString DicCsvReader::unescapeString( QString aString )
{
QString delim = m_params.textDelimiter;
aString = aString.replace( delim + delim, delim );
return aString;
}
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