bids_event.cpp

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//=============================================================================================================
 
//=============================================================================================================
// INCLUDES
//=============================================================================================================
 
#include "bids_event.h"
#include "bids_tsv.h"
 
//=============================================================================================================
// USED NAMESPACES
//=============================================================================================================
 
using namespace BIDSLIB;
 
//=============================================================================================================
// STATIC METHODS
//=============================================================================================================
 
QList<BidsEvent> BidsEvent::readTsv(const QString& sFilePath)
{
    QStringList headers;
    QList<BidsTsvRow> rawRows = BidsTsv::readTsv(sFilePath, headers);
 
    bool hasOnset     = headers.contains(QStringLiteral("onset"));
    bool hasDuration  = headers.contains(QStringLiteral("duration"));
    bool hasSample    = headers.contains(QStringLiteral("sample"));
    bool hasValue     = headers.contains(QStringLiteral("value"));
    bool hasTrialType = headers.contains(QStringLiteral("trial_type"));
 
    QList<BidsEvent> events;
    events.reserve(rawRows.size());
 
    for(const auto& row : rawRows) {
        BidsEvent ev;
 
        if(hasOnset)
            ev.onset = row.value(QStringLiteral("onset"), QStringLiteral("0")).toFloat();
 
        if(hasDuration) {
            QString dur = row.value(QStringLiteral("duration"), QStringLiteral("0"));
            ev.duration = (dur == QStringLiteral("n/a")) ? 0.0f : dur.toFloat();
        }
 
        if(hasSample)
            ev.sample = row.value(QStringLiteral("sample"), QStringLiteral("0")).toInt();
 
        if(hasValue) {
            QString val = row.value(QStringLiteral("value"), QStringLiteral("0"));
            ev.value = (val == QStringLiteral("n/a")) ? 0 : val.toInt();
        }
 
        if(hasTrialType) {
            ev.trialType = row.value(QStringLiteral("trial_type"));
            if(ev.trialType == QStringLiteral("n/a"))
                ev.trialType.clear();
        }
 
        events.append(ev);
    }
 
    return events;
}
 
//=============================================================================================================
 
bool BidsEvent::writeTsv(const QString& sFilePath,
                         const QList<BidsEvent>& events)
{
    QStringList headers = {
        QStringLiteral("onset"),
        QStringLiteral("duration"),
        QStringLiteral("trial_type"),
        QStringLiteral("value"),
        QStringLiteral("sample"),
    };
 
    QList<BidsTsvRow> rows;
    rows.reserve(events.size());
 
    for(const auto& ev : events) {
        BidsTsvRow row;
        row[QStringLiteral("onset")]      = QString::number(static_cast<double>(ev.onset), 'f', 6);
        row[QStringLiteral("duration")]   = QString::number(static_cast<double>(ev.duration), 'f', 6);
        row[QStringLiteral("trial_type")] = ev.trialType.isEmpty() ? QStringLiteral("n/a") : ev.trialType;
        row[QStringLiteral("value")]      = QString::number(ev.value);
        row[QStringLiteral("sample")]     = QString::number(ev.sample);
        rows.append(row);
    }
 
    return BidsTsv::writeTsv(sFilePath, headers, rows);
}