gui: add Age column to peers tab

Co-authored-by: Jon Atack <jon@atack.com>

src/qt/peertablemodel.cpp

@@ -71,6 +71,8 @@ QVariant PeerTableModel::data(const QModelIndex& index, int role) const
         switch (column) {
         case NetNodeId:
             return (qint64)rec->nodeStats.nodeid;
+        case Age:
+            return GUIUtil::FormatPeerAge(rec->nodeStats.m_connected);
         case Address:
             return QString::fromStdString(rec->nodeStats.m_addr_name);
         case Direction:
@@ -96,6 +98,7 @@ QVariant PeerTableModel::data(const QModelIndex& index, int role) const
     } else if (role == Qt::TextAlignmentRole) {
         switch (column) {
         case NetNodeId:
+        case Age:
             return QVariant(Qt::AlignRight | Qt::AlignVCenter);
         case Address:
             return {};

src/qt/peertablemodel.h

@@ -47,6 +47,7 @@ public:
 
     enum ColumnIndex {
         NetNodeId = 0,
+        Age,
         Address,
         Direction,
         ConnectionType,
@@ -82,6 +83,9 @@ private:
         /*: Title of Peers Table column which contains a
             unique number used to identify a connection. */
         tr("Peer"),
+        /*: Title of Peers Table column which indicates the duration (length of time)
+            since the peer connection started. */
+        tr("Age"),
         /*: Title of Peers Table column which contains the
             IP/Onion/I2P address of the connected peer. */
         tr("Address"),

src/qt/peertablesortproxy.cpp

@@ -24,6 +24,8 @@ bool PeerTableSortProxy::lessThan(const QModelIndex& left_index, const QModelInd
     switch (static_cast<PeerTableModel::ColumnIndex>(left_index.column())) {
     case PeerTableModel::NetNodeId:
         return left_stats.nodeid < right_stats.nodeid;
+    case PeerTableModel::Age:
+        return left_stats.m_connected > right_stats.m_connected;
     case PeerTableModel::Address:
         return left_stats.m_addr_name.compare(right_stats.m_addr_name) < 0;
     case PeerTableModel::Direction: