Inital commit

SongListModel.cpp

@@ -0,0 +1,108 @@
+#include "SongListModel.h"
+#include <QTime>
+#include <QRandomGenerator>
+#include <QDebug>
+
+SongListModel::SongListModel(QObject *parent)
+    : QAbstractListModel(parent)
+{
+}
+
+int SongListModel::rowCount(const QModelIndex &parent) const
+{
+    if (parent.isValid())
+        return 0;
+    return songList.size();
+}
+
+QVariant SongListModel::data(const QModelIndex &index, int role) const
+{
+    if (!index.isValid() || index.row() >= songList.size())
+        return QVariant();
+    
+    const SongItem &song = songList[index.row()];
+    
+    switch (role) {
+    case Qt::DisplayRole:
+    case CaptionRole:
+        return song.caption;
+    case LyricsRole:
+        return song.lyrics;
+    default:
+        return QVariant();
+    }
+}
+
+bool SongListModel::setData(const QModelIndex &index, const QVariant &value, int role)
+{
+    if (!index.isValid() || index.row() >= songList.size())
+        return false;
+    
+    SongItem &song = songList[index.row()];
+    
+    switch (role) {
+    case CaptionRole:
+        song.caption = value.toString();
+        break;
+    case LyricsRole:
+        song.lyrics = value.toString();
+        break;
+    default:
+        return false;
+    }
+    
+    emit dataChanged(index, index, {role});
+    return true;
+}
+
+Qt::ItemFlags SongListModel::flags(const QModelIndex &index) const
+{
+    if (!index.isValid())
+        return Qt::NoItemFlags;
+    
+    return Qt::ItemIsEnabled | Qt::ItemIsSelectable | Qt::ItemIsEditable;
+}
+
+void SongListModel::addSong(const SongItem &song)
+{
+    beginInsertRows(QModelIndex(), songList.size(), songList.size());
+    songList.append(song);
+    endInsertRows();
+}
+
+void SongListModel::removeSong(int index)
+{
+    if (index >= 0 && index < songList.size()) {
+        beginRemoveRows(QModelIndex(), index, index);
+        songList.removeAt(index);
+        endRemoveRows();
+    }
+}
+
+SongItem SongListModel::getSong(int index) const
+{
+    if (index >= 0 && index < songList.size()) {
+        return songList[index];
+    }
+    return SongItem();
+}
+
+int SongListModel::findNextIndex(int currentIndex, bool shuffle) const
+{
+    if (songList.isEmpty())
+        return -1;
+    
+    if (shuffle) {
+        // Simple random selection for shuffle mode
+        QRandomGenerator generator;
+        return generator.bounded(songList.size());
+    }
+    
+    // Sequential playback
+    int nextIndex = currentIndex + 1;
+    if (nextIndex >= songList.size()) {
+        nextIndex = 0; // Loop back to beginning
+    }
+    
+    return nextIndex;
+}