Merge #161: Add PeerTableModel::StatsRole to prevent data layer violation

b3e9bca qt, refactor: Drop no longer used PeerTableModel::getNodeStats function (Hennadii Stepanov)
49c6040 qt: Use PeerTableModel::StatsRole (Hennadii Stepanov)
35007ed qt: Add PeerTableModel::StatsRole (Hennadii Stepanov)

Pull request description:

  This PR allows to access to the `CNodeCombinedStats` instance directly from any view object.

  The `PeerTableModel::getNodeStats` member function removed as a kind of layer violation.

  No behavior changes.

  Also other pulls (bugfixes) are based on this one: #18 and #164.

ACKs for top commit:
  jonatack:
    Tested re-ACK b3e9bca per `git range-diff ae8f797 4c05fe0 b3e9bca`
  promag:
    Code review ACK b3e9bca.
  jonasschnelli:
    utACK b3e9bca

Tree-SHA512: 6ba50d5dd2c0373655d491ce8b130c47d598da2db5ff4b00633f447404c7e70f8562ead53ddf166e851384d9632ff9146a770c99845c2cdd3ff7250677e4c130

Author: jonasschnelli

src/qt/peertablemodel.cpp

@@ -185,6 +185,11 @@ QVariant PeerTableModel::data(const QModelIndex &index, int role) const
             default:
                 return QVariant();
         }
+    } else if (role == StatsRole) {
+        switch (index.column()) {
+        case NetNodeId: return QVariant::fromValue(rec);
+        default: return QVariant();
+        }
     }
 
     return QVariant();
@@ -220,11 +225,6 @@ QModelIndex PeerTableModel::index(int row, int column, const QModelIndex &parent
     return QModelIndex();
 }
 
-const CNodeCombinedStats *PeerTableModel::getNodeStats(int idx)
-{
-    return priv->index(idx);
-}
-
 void PeerTableModel::refresh()
 {
     Q_EMIT layoutAboutToBeChanged();

src/qt/peertablemodel.h

@@ -28,6 +28,7 @@ struct CNodeCombinedStats {
     CNodeStateStats nodeStateStats;
     bool fNodeStateStatsAvailable;
 };
+Q_DECLARE_METATYPE(CNodeCombinedStats*)
 
 class NodeLessThan
 {
@@ -52,7 +53,6 @@ class PeerTableModel : public QAbstractTableModel
 public:
     explicit PeerTableModel(interfaces::Node& node, QObject* parent);
     ~PeerTableModel();
-    const CNodeCombinedStats *getNodeStats(int idx);
     int getRowByNodeId(NodeId nodeid);
     void startAutoRefresh();
     void stopAutoRefresh();
@@ -67,6 +67,10 @@ class PeerTableModel : public QAbstractTableModel
         Subversion = 6
     };
 
+    enum {
+        StatsRole = Qt::UserRole,
+    };
+
     /** @name Methods overridden from QAbstractTableModel
         @{*/
     int rowCount(const QModelIndex &parent) const override;

src/qt/rpcconsole.cpp

@@ -1022,11 +1022,9 @@ void RPCConsole::updateTrafficStats(quint64 totalBytesIn, quint64 totalBytesOut)
 
 void RPCConsole::peerLayoutAboutToChange()
 {
-    QModelIndexList selected = ui->peerWidget->selectionModel()->selectedIndexes();
     cachedNodeids.clear();
-    for(int i = 0; i < selected.size(); i++)
-    {
-        const CNodeCombinedStats *stats = clientModel->getPeerTableModel()->getNodeStats(selected.at(i).row());
+    for (const QModelIndex& peer : GUIUtil::getEntryData(ui->peerWidget, PeerTableModel::NetNodeId)) {
+        const auto stats = peer.data(PeerTableModel::StatsRole).value<CNodeCombinedStats*>();
         cachedNodeids.append(stats->nodeStats.nodeid);
     }
 }
@@ -1085,15 +1083,13 @@ void RPCConsole::peerLayoutChanged()
 
 void RPCConsole::updateDetailWidget()
 {
-    QModelIndexList selected_rows;
-    auto selection_model = ui->peerWidget->selectionModel();
-    if (selection_model) selected_rows = selection_model->selectedRows();
-    if (!clientModel || !clientModel->getPeerTableModel() || selected_rows.size() != 1) {
+    const QList<QModelIndex> selected_peers = GUIUtil::getEntryData(ui->peerWidget, PeerTableModel::NetNodeId);
+    if (!clientModel || !clientModel->getPeerTableModel() || selected_peers.size() != 1) {
         ui->detailWidget->hide();
         ui->peerHeading->setText(tr("Select a peer to view detailed information."));
         return;
     }
-    const CNodeCombinedStats *stats = clientModel->getPeerTableModel()->getNodeStats(selected_rows.first().row());
+    const auto stats = selected_peers.first().data(PeerTableModel::StatsRole).value<CNodeCombinedStats*>();
     // update the detail ui with latest node information
     QString peerAddrDetails(QString::fromStdString(stats->nodeStats.addrName) + " ");
     peerAddrDetails += tr("(peer id: %1)").arg(QString::number(stats->nodeStats.nodeid));
@@ -1206,19 +1202,9 @@ void RPCConsole::banSelectedNode(int bantime)
     if (!clientModel)
         return;
 
-    // Get selected peer addresses
-    QList<QModelIndex> nodes = GUIUtil::getEntryData(ui->peerWidget, PeerTableModel::NetNodeId);
-    for(int i = 0; i < nodes.count(); i++)
-    {
-        // Get currently selected peer address
-        NodeId id = nodes.at(i).data().toLongLong();
-
-        // Get currently selected peer address
-        int detailNodeRow = clientModel->getPeerTableModel()->getRowByNodeId(id);
-        if (detailNodeRow < 0) return;
-
+    for (const QModelIndex& peer : GUIUtil::getEntryData(ui->peerWidget, PeerTableModel::NetNodeId)) {
         // Find possible nodes, ban it and clear the selected node
-        const CNodeCombinedStats *stats = clientModel->getPeerTableModel()->getNodeStats(detailNodeRow);
+        const auto stats = peer.data(PeerTableModel::StatsRole).value<CNodeCombinedStats*>();
         if (stats) {
             m_node.ban(stats->nodeStats.addr, bantime);
             m_node.disconnectByAddress(stats->nodeStats.addr);