File indexing completed on 2024-04-28 03:45:38

 // SPDX-FileCopyrightText: 2007-2010 Peter Hedlund <peter.hedlund@kdemail.net>
 // SPDX-License-Identifier: GPL-2.0-or-later
 
 #include "kwqrandomsortmodel.h"
 #include "kwqcardmodel.h"
 #include "prefs.h"
 
 #include <KRandom>
 #include <QRandomGenerator>
 
 KWQRandomSortModel::KWQRandomSortModel(QObject *parent)
     : QSortFilterProxyModel(parent)
 {
     m_sourceModel = nullptr;
     setSortCaseSensitivity(Qt::CaseInsensitive);
     setFilterCaseSensitivity(Qt::CaseInsensitive);
     setFilterKeyColumn(-1);
     m_restoreNativeOrder = false;
     m_shuffle = false;
 
     auto reset = [this] {
         this->reset();
         Prefs::self()->save();
     };
 
     connect(Prefs::self(), &Prefs::RandomizeChanged, this, reset);
     connect(Prefs::self(), &Prefs::QuestionInLeftColumnChanged, this, reset);
     connect(Prefs::self(), &Prefs::QuestionInRightColumnChanged, this, reset);
 }
 
 QVariant KWQRandomSortModel::data(const QModelIndex &idx, int role) const
 {
     auto mode = idx.row() >= m_modes.count() ? QuestionInLeftColumn : m_modes[idx.row()];
 
     if (role == MultipleChoiceRole) {
         if (rowCount() < 4) {
             return QStringList();
         }
 
         const auto rowRole = mode == QuestionInRightColumn
             ? KWQCardModel::QuestionRole
             : KWQCardModel::AnswerRole;
 
         QList<int> possibleIndex;
         for (int i = 0; i < rowCount(); i++) {
             possibleIndex << i;
         }
         possibleIndex.removeAll(idx.row());
 
         KRandom::shuffle(possibleIndex, QRandomGenerator::global());
 
         QStringList possibleAnswer;
         possibleAnswer << QSortFilterProxyModel::data(index(possibleIndex[0], 0), rowRole).toString();
         possibleAnswer << QSortFilterProxyModel::data(index(possibleIndex[1], 0), rowRole).toString();
         possibleAnswer << QSortFilterProxyModel::data(index(possibleIndex[3], 0), rowRole).toString();
         possibleAnswer << QSortFilterProxyModel::data(index(idx.row(), 0), rowRole).toString();
 
         KRandom::shuffle(possibleAnswer, QRandomGenerator::global());
 
         return QVariant::fromValue(possibleAnswer);
     }
 
     if (mode == QuestionInRightColumn) {
         switch (role) {
         case KWQCardModel::AnswerRole:
             role = KWQCardModel::QuestionRole;
             break;
         case KWQCardModel::AnswerSoundRole:
             role = KWQCardModel::QuestionSoundRole;
             break;
         case KWQCardModel::AnswerImageRole:
             role = KWQCardModel::QuestionImageRole;
             break;
         case KWQCardModel::QuestionRole:
             role = KWQCardModel::AnswerRole;
             break;
         case KWQCardModel::QuestionSoundRole:
             role = KWQCardModel::AnswerSoundRole;
             break;
         case KWQCardModel::QuestionImageRole:
             role = KWQCardModel::AnswerImageRole;
             break;
         }
     }
 
     return QSortFilterProxyModel::data(idx, role);
 }
 
 QHash<int, QByteArray> KWQRandomSortModel::roleNames() const
 {
     auto roles = QSortFilterProxyModel::roleNames();
     roles[MultipleChoiceRole] = "multipleChoice";
     return roles;
 }
 
 void KWQRandomSortModel::setCardModel(KWQCardModel *sourceModel)
 {
     if (m_sourceModel == sourceModel) {
         return;
     }
     if (m_sourceModel) {
         disconnect(m_sourceModel, &KWQCardModel::modelReset, this, &KWQRandomSortModel::reset);
     }
     m_sourceModel = sourceModel;
     QSortFilterProxyModel::setSourceModel(sourceModel);
     Q_EMIT cardModelChanged();
 
     if (m_sourceModel) {
         connect(m_sourceModel, &KWQCardModel::modelReset, this, &KWQRandomSortModel::reset);
     }
     reset();
 }
 
 KWQCardModel *KWQRandomSortModel::cardModel() const
 {
     return m_sourceModel;
 }
 
 bool KWQRandomSortModel::lessThan(const QModelIndex &left, const QModelIndex &right) const
 {
     if (m_shuffle) {
         return m_shuffleList.at(right.row()) < m_shuffleList.at(left.row());
     } else if (m_restoreNativeOrder) {
         return sourceModel()->index(right.row(), right.column()).row() <
                sourceModel()->index(left.row(), left.column()).row();
     } else {
         return QSortFilterProxyModel::lessThan(left, right);
     }
 }
 
 bool KWQRandomSortModel::filterAcceptsRow(const int sourceRow, const QModelIndex &sourceParent) const
 {
     if (!m_showErrorsOnly) {
         return true;
     }
 
     return m_errors.contains(sourceRow);
 }
 
 void KWQRandomSortModel::setRandomModes()
 {
     m_modes.clear();
     if (Prefs::questionInLeftColumn() && !Prefs::questionInRightColumn()) {
         for (int i = 0; i < rowCount({}); ++i) {
             m_modes.append(QuestionInLeftColumn);
         }
     } else if (!Prefs::questionInLeftColumn() && Prefs::questionInRightColumn()) {
         for (int i = 0; i < rowCount({}); ++i) {
             m_modes.append(QuestionInRightColumn);
         }
     } else {
         auto generator = QRandomGenerator::global();
         for (int i = 0; i < rowCount({}); ++i) {
             if (generator->bounded(2) == 1) {
                 m_modes.append(QuestionInLeftColumn);
             } else {
                 m_modes.append(QuestionInRightColumn);
             }
         }
     }
 }
 
 void KWQRandomSortModel::reset()
 {
     if (Prefs::randomize()) {
         shuffle();
     } else {
         restoreNativeOrder();
     }
 }
 
 void KWQRandomSortModel::restoreNativeOrder()
 {
     m_errors.clear();
     m_restoreNativeOrder = true;
     setRandomModes();
     sort(-1, Qt::AscendingOrder);
     invalidate();
     m_restoreNativeOrder = false;
     m_modes.clear();
 }
 
 void KWQRandomSortModel::shuffle()
 {
     m_errors.clear();
     m_shuffleList.clear();
     setRandomModes();
     for (int i = 0; i < rowCount({}); ++i)
         m_shuffleList.append(i);
 
     KRandom::shuffle(m_shuffleList, QRandomGenerator::global());
     m_shuffle = true;
     sort(0, Qt::AscendingOrder);
     invalidate();
     m_shuffle = false;
 }
 
 void KWQRandomSortModel::markAsError(const int row)
 {
     m_errors << sourceModel()->index(row, 0).row();
 }
 
 void KWQRandomSortModel::unMarkAsError(const int row)
 {
     m_errors.removeAll(sourceModel()->index(row, 0).row());
 }
 
 bool KWQRandomSortModel::showErrorsOnly() const
 {
     return m_showErrorsOnly;
 }
 
 void KWQRandomSortModel::setShowErrorsOnly(const bool showErrorsOnly)
 {
     if (m_showErrorsOnly == showErrorsOnly) {
         return;
     }
     m_showErrorsOnly = showErrorsOnly;
     Q_EMIT showErrorsOnlyChanged();
     invalidateFilter();
 }
 
 #include "moc_kwqrandomsortmodel.cpp"