bantablemodel.cpp

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// Copyright (c) 2011-2016 The Bitcoin Core developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
#include <qt/bantablemodel.h>
 
#include <interfaces/node.h>
#include <net_types.h> // For banmap_t
 
#include <utility>
 
#include <QDateTime>
#include <QList>
#include <QLocale>
#include <QModelIndex>
#include <QVariant>
 
bool BannedNodeLessThan::operator()(const CCombinedBan &left,
                                    const CCombinedBan &right) const {
    const CCombinedBan *pLeft = &left;
    const CCombinedBan *pRight = &right;
 
    if (order == Qt::DescendingOrder) {
        std::swap(pLeft, pRight);
    }
 
    switch (column) {
        case BanTableModel::Address:
            return pLeft->subnet.ToString().compare(pRight->subnet.ToString()) <
                   0;
        case BanTableModel::Bantime:
            return pLeft->banEntry.nBanUntil < pRight->banEntry.nBanUntil;
    }
 
    return false;
}
 
// private implementation
class BanTablePriv {
public:
    QList<CCombinedBan> cachedBanlist;
    int sortColumn{-1};
    Qt::SortOrder sortOrder;
 
    void refreshBanlist(interfaces::Node &node) {
        banmap_t banMap;
        node.getBanned(banMap);
 
        cachedBanlist.clear();
        cachedBanlist.reserve(banMap.size());
        for (const auto &entry : banMap) {
            CCombinedBan banEntry;
            banEntry.subnet = entry.first;
            banEntry.banEntry = entry.second;
            cachedBanlist.append(banEntry);
        }
 
        if (sortColumn >= 0) {
            // sort cachedBanlist (use stable sort to prevent rows jumping
            // around unnecessarily)
            std::stable_sort(cachedBanlist.begin(), cachedBanlist.end(),
                             BannedNodeLessThan(sortColumn, sortOrder));
        }
    }
 
    int size() const { return cachedBanlist.size(); }
 
    CCombinedBan *index(int idx) {
        if (idx >= 0 && idx < cachedBanlist.size()) {
            return &cachedBanlist[idx];
        }
 
        return nullptr;
    }
};
 
BanTableModel::BanTableModel(interfaces::Node &node, QObject *parent)
    : QAbstractTableModel(parent), m_node(node) {
    columns << tr("IP/Netmask") << tr("Banned Until");
    priv.reset(new BanTablePriv());
 
    // load initial data
    refresh();
}
 
BanTableModel::~BanTableModel() {
    // Intentionally left empty
}
 
int BanTableModel::rowCount(const QModelIndex &parent) const {
    Q_UNUSED(parent);
    return priv->size();
}
 
int BanTableModel::columnCount(const QModelIndex &parent) const {
    Q_UNUSED(parent);
    return columns.length();
}
 
QVariant BanTableModel::data(const QModelIndex &index, int role) const {
    if (!index.isValid()) {
        return QVariant();
    }
 
    CCombinedBan *rec = static_cast<CCombinedBan *>(index.internalPointer());
 
    if (role == Qt::DisplayRole) {
        switch (index.column()) {
            case Address:
                return QString::fromStdString(rec->subnet.ToString());
            case Bantime:
                QDateTime date = QDateTime::fromMSecsSinceEpoch(0);
                date = date.addSecs(rec->banEntry.nBanUntil);
                return date.toString(QLocale().dateTimeFormat());
        }
    }
 
    return QVariant();
}
 
QVariant BanTableModel::headerData(int section, Qt::Orientation orientation,
                                   int role) const {
    if (orientation == Qt::Horizontal) {
        if (role == Qt::DisplayRole && section < columns.size()) {
            return columns[section];
        }
    }
    return QVariant();
}
 
Qt::ItemFlags BanTableModel::flags(const QModelIndex &index) const {
    if (!index.isValid()) {
        return Qt::NoItemFlags;
    }
 
    Qt::ItemFlags retval = Qt::ItemIsSelectable | Qt::ItemIsEnabled;
    return retval;
}
 
QModelIndex BanTableModel::index(int row, int column,
                                 const QModelIndex &parent) const {
    Q_UNUSED(parent);
    CCombinedBan *data = priv->index(row);
 
    if (data) {
        return createIndex(row, column, data);
    }
    return QModelIndex();
}
 
void BanTableModel::refresh() {
    Q_EMIT layoutAboutToBeChanged();
    priv->refreshBanlist(m_node);
    Q_EMIT layoutChanged();
}
 
void BanTableModel::sort(int column, Qt::SortOrder order) {
    priv->sortColumn = column;
    priv->sortOrder = order;
    refresh();
}
 
bool BanTableModel::shouldShow() {
    return priv->size() > 0;
}