Make BitTorrent::TorrentState strongly-typed enum

This is needed to forward declare this type and pass it by value.

Conversion from/to QVariant are hanled via Q_DECLARE_METATYPE, while
TorrentState::toString() function was used in webui only and as such is
moved there.

src/base/bittorrent/torrenthandle.cpp

@@ -131,64 +131,6 @@ AddTorrentData::AddTorrentData(const AddTorrentParams &params)
         savePath = Session::instance()->defaultSavePath();
 }
 
-// TorrentState
-
-TorrentState::TorrentState(int value)
-    : m_value(value)
-{
-}
-
-QString TorrentState::toString() const
-{
-    switch (m_value) {
-    case Error:
-        return QLatin1String("error");
-    case MissingFiles:
-        return QLatin1String("missingFiles");
-    case Uploading:
-        return QLatin1String("uploading");
-    case PausedUploading:
-        return QLatin1String("pausedUP");
-    case QueuedUploading:
-        return QLatin1String("queuedUP");
-    case StalledUploading:
-        return QLatin1String("stalledUP");
-    case CheckingUploading:
-        return QLatin1String("checkingUP");
-    case ForcedUploading:
-        return QLatin1String("forcedUP");
-    case Allocating:
-        return QLatin1String("allocating");
-    case Downloading:
-        return QLatin1String("downloading");
-    case DownloadingMetadata:
-        return QLatin1String("metaDL");
-    case PausedDownloading:
-        return QLatin1String("pausedDL");
-    case QueuedDownloading:
-        return QLatin1String("queuedDL");
-    case StalledDownloading:
-        return QLatin1String("stalledDL");
-    case CheckingDownloading:
-        return QLatin1String("checkingDL");
-    case ForcedDownloading:
-        return QLatin1String("forcedDL");
-#if LIBTORRENT_VERSION_NUM < 10100
-    case QueuedForChecking:
-        return QLatin1String("queuedForChecking");
-#endif
-    case CheckingResumeData:
-        return QLatin1String("checkingResumeData");
-    default:
-        return QLatin1String("unknown");
-    }
-}
-
-TorrentState::operator int() const
-{
-    return m_value;
-}
-
 // TorrentHandle
 
 const qreal TorrentHandle::USE_GLOBAL_RATIO = -2.;

src/base/bittorrent/torrenthandle.h

@@ -120,10 +120,7 @@ namespace BitTorrent
         quint32 numPeers = 0;
     };
 
-    class TorrentState
+    enum class TorrentState
-    {
-    public:
-        enum
     {
         Unknown = -1,
 
@@ -137,17 +134,16 @@ namespace BitTorrent
         Uploading,
         StalledUploading,
 
+#if LIBTORRENT_VERSION_NUM < 10100
+        QueuedForChecking,
+#endif
+        CheckingResumeData,
         QueuedDownloading,
         QueuedUploading,
 
         CheckingUploading,
         CheckingDownloading,
 
-#if LIBTORRENT_VERSION_NUM < 10100
-            QueuedForChecking,
-#endif
-            CheckingResumeData,
-
         PausedDownloading,
         PausedUploading,
 
@@ -155,15 +151,6 @@ namespace BitTorrent
         Error
     };
 
-        TorrentState(int value);
-
-        operator int() const;
-        QString toString() const;
-
-    private:
-        int m_value;
-    };
-
     class TorrentHandle : public QObject
     {
         Q_DISABLE_COPY(TorrentHandle)
@@ -474,4 +461,6 @@ namespace BitTorrent
     };
 }
 
+Q_DECLARE_METATYPE(BitTorrent::TorrentState)
+
 #endif // BITTORRENT_TORRENTHANDLE_H

src/base/torrentfilter.h

@@ -37,7 +37,6 @@ typedef QSet<QString> QStringSet;
 namespace BitTorrent
 {
     class TorrentHandle;
-    class TorrentState;
 }
 
 class TorrentFilter

src/gui/transferlistdelegate.cpp

@@ -58,7 +58,7 @@ void TransferListDelegate::paint(QPainter * painter, const QStyleOptionViewItem
     bool isHideState = true;
     if (Preferences::instance()->getHideZeroComboValues() == 1) {  // paused torrents only
         QModelIndex stateIndex = index.sibling(index.row(), TorrentModel::TR_STATUS);
-        if (stateIndex.data().toInt() != BitTorrent::TorrentState::PausedDownloading)
+        if (stateIndex.data().value<BitTorrent::TorrentState>() != BitTorrent::TorrentState::PausedDownloading)
             isHideState = false;
     }
     const bool hideValues = Preferences::instance()->getHideZeroValues() & isHideState;
@@ -98,7 +98,7 @@ void TransferListDelegate::paint(QPainter * painter, const QStyleOptionViewItem
         break;
     }
     case TorrentModel::TR_STATUS: {
-        const int state = index.data().toInt();
+        const auto state = index.data().value<BitTorrent::TorrentState>();
         QString display = getStatusString(state);
         QItemDelegate::drawDisplay(painter, opt, opt.rect, display);
         break;
@@ -223,7 +223,7 @@ QSize TransferListDelegate::sizeHint(const QStyleOptionViewItem & option, const
     return size;
 }
 
-QString TransferListDelegate::getStatusString(const int state) const
+QString TransferListDelegate::getStatusString(const BitTorrent::TorrentState state) const
 {
     QString str;
 

src/gui/transferlistdelegate.h

@@ -39,6 +39,10 @@ class QStyleOptionViewItem;
 class QModelIndex;
 QT_END_NAMESPACE
 
+namespace BitTorrent
+{
+    enum class TorrentState;
+}
 // Defines for download list list columns
 
 class TransferListDelegate: public QItemDelegate
@@ -52,7 +56,7 @@ public:
     QSize sizeHint(const QStyleOptionViewItem & option, const QModelIndex & index) const;
 
 private:
-    QString getStatusString(const int state) const;
+    QString getStatusString(const BitTorrent::TorrentState state) const;
 };
 
 #endif // TRANSFERLISTDELEGATE_H

src/webui/btjson.cpp

@@ -34,6 +34,8 @@
 #include <QElapsedTimer>
 #include <QVariant>
 
+#include <libtorrent/version.hpp>
+
 #include "base/bittorrent/cachestatus.h"
 #include "base/bittorrent/session.h"
 #include "base/bittorrent/sessionstatus.h"
@@ -227,6 +229,52 @@ static const char KEY_LOG_PEER_REASON[] = "reason";
 
 namespace
 {
+    QString torrentStateToString(const BitTorrent::TorrentState state)
+    {
+        switch (state) {
+        case BitTorrent::TorrentState::Error:
+            return QLatin1String("error");
+        case BitTorrent::TorrentState::MissingFiles:
+            return QLatin1String("missingFiles");
+        case BitTorrent::TorrentState::Uploading:
+            return QLatin1String("uploading");
+        case BitTorrent::TorrentState::PausedUploading:
+            return QLatin1String("pausedUP");
+        case BitTorrent::TorrentState::QueuedUploading:
+            return QLatin1String("queuedUP");
+        case BitTorrent::TorrentState::StalledUploading:
+            return QLatin1String("stalledUP");
+        case BitTorrent::TorrentState::CheckingUploading:
+            return QLatin1String("checkingUP");
+        case BitTorrent::TorrentState::ForcedUploading:
+            return QLatin1String("forcedUP");
+        case BitTorrent::TorrentState::Allocating:
+            return QLatin1String("allocating");
+        case BitTorrent::TorrentState::Downloading:
+            return QLatin1String("downloading");
+        case BitTorrent::TorrentState::DownloadingMetadata:
+            return QLatin1String("metaDL");
+        case BitTorrent::TorrentState::PausedDownloading:
+            return QLatin1String("pausedDL");
+        case BitTorrent::TorrentState::QueuedDownloading:
+            return QLatin1String("queuedDL");
+        case BitTorrent::TorrentState::StalledDownloading:
+            return QLatin1String("stalledDL");
+        case BitTorrent::TorrentState::CheckingDownloading:
+            return QLatin1String("checkingDL");
+        case BitTorrent::TorrentState::ForcedDownloading:
+            return QLatin1String("forcedDL");
+#if LIBTORRENT_VERSION_NUM < 10100
+        case BitTorrent::TorrentState::QueuedForChecking:
+            return QLatin1String("queuedForChecking");
+#endif
+        case BitTorrent::TorrentState::CheckingResumeData:
+            return QLatin1String("checkingResumeData");
+        default:
+            return QLatin1String("unknown");
+        }
+    }
+
     class QTorrentCompare
     {
     public:
@@ -315,7 +363,7 @@ namespace
         ret[KEY_TORRENT_NUM_INCOMPLETE] = torrent->totalLeechersCount();
         const qreal ratio = torrent->realRatio();
         ret[KEY_TORRENT_RATIO] = (ratio > BitTorrent::TorrentHandle::MAX_RATIO) ? -1 : ratio;
-        ret[KEY_TORRENT_STATE] = torrent->state().toString();
+        ret[KEY_TORRENT_STATE] = torrentStateToString(torrent->state());
         ret[KEY_TORRENT_ETA] = torrent->eta();
         ret[KEY_TORRENT_SEQUENTIAL_DOWNLOAD] = torrent->isSequentialDownload();
         if (torrent->hasMetadata())