Implement model, controller and UI for killswitch dns exceptions

client/ui/models/allowed_dns_model.cpp

@@ -0,0 +1,86 @@
+#include "allowed_dns_model.h"
+
+AllowedDnsModel::AllowedDnsModel(std::shared_ptr<Settings> settings, QObject *parent)
+    : QAbstractListModel(parent), m_settings(settings)
+{
+    fillDnsServers();
+}
+
+int AllowedDnsModel::rowCount(const QModelIndex &parent) const
+{
+    Q_UNUSED(parent)
+    return m_dnsServers.size();
+}
+
+QVariant AllowedDnsModel::data(const QModelIndex &index, int role) const
+{
+    if (!index.isValid() || index.row() < 0 || index.row() >= static_cast<int>(rowCount()))
+        return QVariant();
+
+    switch (role) {
+    case IpRole:
+        return m_dnsServers.at(index.row());
+    default:
+        return QVariant();
+    }
+}
+
+bool AllowedDnsModel::addDns(const QString &ip)
+{
+    if (m_dnsServers.contains(ip)) {
+        return false;
+    }
+
+    beginInsertRows(QModelIndex(), rowCount(), rowCount());
+    m_dnsServers.append(ip);
+    m_settings->setAllowedDnsServers(m_dnsServers);
+    endInsertRows();
+    return true;
+}
+
+void AllowedDnsModel::addDnsList(const QStringList &dnsServers, bool replaceExisting)
+{
+    beginResetModel();
+    
+    if (replaceExisting) {
+        m_dnsServers.clear();
+    }
+    
+    for (const QString &ip : dnsServers) {
+        if (!m_dnsServers.contains(ip)) {
+            m_dnsServers.append(ip);
+        }
+    }
+    
+    m_settings->setAllowedDnsServers(m_dnsServers);
+    endResetModel();
+}
+
+void AllowedDnsModel::removeDns(QModelIndex index)
+{
+    if (!index.isValid() || index.row() >= m_dnsServers.size()) {
+        return;
+    }
+
+    beginRemoveRows(QModelIndex(), index.row(), index.row());
+    m_dnsServers.removeAt(index.row());
+    m_settings->setAllowedDnsServers(m_dnsServers);
+    endRemoveRows();
+}
+
+QStringList AllowedDnsModel::getCurrentDnsServers()
+{
+    return m_dnsServers;
+}
+
+QHash<int, QByteArray> AllowedDnsModel::roleNames() const
+{
+    QHash<int, QByteArray> roles;
+    roles[IpRole] = "ip";
+    return roles;
+}
+
+void AllowedDnsModel::fillDnsServers()
+{
+    m_dnsServers = m_settings->allowedDnsServers();
+}