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#include "csvserializer.h"
#include <QStringList>
#include <QList>
#include <QDebug>
#include <QTime>
template <class C>
bool isCsvSeparator(QList<C>& ahead, const C& theChar, const QStringList& separators)
{
for (const QString& sep : separators)
if (isCsvSeparator(ahead, theChar, sep))
return true;
return false;
}
template <class C>
bool isCsvSeparator(QList<C>& ahead, const C& theChar, const QString& singleSeparator)
{
if (singleSeparator[0] != theChar)
return false;
typename QList<C>::const_iterator aheadIter = ahead.begin();
int singleSeparatorSize = singleSeparator.size();
int i = 1;
while (aheadIter != ahead.end() && i < singleSeparatorSize)
{
if (singleSeparator[i++] != *aheadIter++)
return false;
}
if (i < singleSeparatorSize)
return false;
for (int i = 1, total = singleSeparator.size(); i < total; ++i)
ahead.removeFirst();
return true;
}
template <class C>
bool isCsvColumnSeparator(QList<C>& ahead, const C& theChar, const CsvFormat& format)
{
if (!format.strictColumnSeparator)
return format.columnSeparator.contains(theChar);
// Strict checking (characters in defined order make a separator)
if (format.multipleColumnSeparators)
return isCsvSeparator(ahead, theChar, format.columnSeparators);
return isCsvSeparator(ahead, theChar, format.columnSeparator);
}
template <class C>
bool isCsvRowSeparator(QList<C>& ahead, const C& theChar, const CsvFormat& format)
{
if (!format.strictRowSeparator)
return format.rowSeparator.contains(theChar);
// Strict checking (characters in defined order make a separator)
if (format.multipleRowSeparators)
return isCsvSeparator(ahead, theChar, format.rowSeparators);
return isCsvSeparator(ahead, theChar, format.rowSeparator);
}
template <class C>
void readAhead(QTextStream& data, QList<C>& ahead, int desiredSize)
{
C singleValue;
while (!data.atEnd() && ahead.size() < desiredSize)
{
data >> singleValue;
ahead << singleValue;
}
}
template <class T, class C>
void typedDeserializeInternal(QTextStream& data, const CsvFormat& format, QList<T>* cells, QList<QList<T>>* rows)
{
bool quotes = false;
bool sepAsLast = false;
int separatorMaxAhead = qMax(format.maxColumnSeparatorLength, format.maxRowSeparatorLength) - 1;
T field = "";
field.reserve(3);
C theChar;
QList<C> ahead;
while (!data.atEnd() || !ahead.isEmpty())
{
if (!ahead.isEmpty())
theChar = ahead.takeFirst();
else
data >> theChar;
sepAsLast = false;
if (format.quotationMark && !quotes && theChar == '"' )
{
quotes = true;
}
else if (quotes && theChar == '"' )
{
if (!data.atEnd())
{
readAhead(data, ahead, 1);
if (ahead.isEmpty())
{
field += theChar;
}
else if (ahead.first() == '"' )
{
field += theChar;
ahead.removeFirst();
}
else
{
quotes = false;
}
}
else
{
if (field.length() == 0)
*cells << field;
quotes = false;
}
}
else if (!quotes)
{
readAhead(data, ahead, separatorMaxAhead);
if (isCsvColumnSeparator(ahead, theChar, format))
{
*cells << field;
field.truncate(0);
sepAsLast = true;
}
else if (isCsvRowSeparator(ahead, theChar, format))
{
*cells << field;
field.truncate(0);
if (rows)
{
*rows << *cells;
cells->clear();
}
else
{
break;
}
}
else
{
field += theChar;
}
}
else
{
field += theChar;
}
}
if (field.size() > 0 || sepAsLast)
*cells << field;
if (rows)
{
if (cells->size() > 0)
*rows << *cells;
}
else if (!ahead.isEmpty())
{
data.seek(data.pos() - 1);
}
}
template <class T, class C>
QList<QList<T>> typedDeserialize(QTextStream& data, const CsvFormat& format)
{
QList<QList<T>> rows;
QList<T> cells;
typedDeserializeInternal<T, C>(data, format, &cells, &rows);
return rows;
}
template <class T, class C>
QList<T> typedDeserializeOneEntry(QTextStream& data, const CsvFormat& format)
{
QList<T> cells;
typedDeserializeInternal<T, C>(data, format, &cells, nullptr);
return cells;
}
QString CsvSerializer::serialize(const QList<QStringList>& data, const CsvFormat& format)
{
QStringList outputRows;
for (const QStringList& dataRow : data)
outputRows << serialize(dataRow, format);
return outputRows.join(format.rowSeparator);
}
QString CsvSerializer::serialize(const QStringList& data, const CsvFormat& format)
{
QString value;
bool hasQuote;
QStringList outputCells;
for (const QString& rowValue : data)
{
value = rowValue;
hasQuote = value.contains("\"");
if (hasQuote)
value.replace("\"", "\"\"");
if (hasQuote || value.contains(format.columnSeparator) || value.contains(format.rowSeparator))
value = "\""+value+"\"";
outputCells << value;
}
return outputCells.join(format.columnSeparator);
}
QStringList CsvSerializer::deserializeOneEntry(QTextStream& data, const CsvFormat& format)
{
QList<QString> deserialized = typedDeserializeOneEntry<QString, QChar>(data, format);
return QStringList(deserialized);
}
QList<QList<QByteArray>> CsvSerializer::deserialize(const QByteArray& data, const CsvFormat& format)
{
QTextStream stream(data, QIODevice::ReadWrite);
return typedDeserialize<QByteArray,char>(stream, format);
}
QList<QStringList> CsvSerializer::deserialize(QTextStream& data, const CsvFormat& format)
{
QList<QList<QString>> deserialized = typedDeserialize<QString, QChar>(data, format);
QList<QStringList> finalList;
for (const QList<QString>& resPart : deserialized)
finalList << QStringList(resPart);
return finalList;
}
QList<QStringList> CsvSerializer::deserialize(const QString& data, const CsvFormat& format)
{
QString dataString = data;
QTextStream stream(&dataString, QIODevice::ReadWrite);
return deserialize(stream, format);
}
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