Drop I2P support with libtorrent 1.2

PR #19207.
Closes #19152.

src/base/bittorrent/peerinfo.cpp

@@ -184,7 +184,7 @@ QString PeerInfo::I2PAddress() const
     if (!useI2PSocket())
         return {};
 
-#ifdef QBT_USES_LIBTORRENT2
+#if defined(QBT_USES_LIBTORRENT2) && TORRENT_USE_I2P
     if (m_I2PAddress.isEmpty())
     {
         const lt::sha256_hash destHash = m_nativeInfo.i2p_destination();

src/base/bittorrent/sessionimpl.cpp

@@ -1668,6 +1668,7 @@ lt::settings_pack SessionImpl::loadLTSettings() const
     settingsPack.set_int(lt::settings_pack::active_checking, maxActiveCheckingTorrents());
 
     // I2P
+#if defined(QBT_USES_LIBTORRENT2) && TORRENT_USE_I2P
     if (isI2PEnabled())
     {
         settingsPack.set_str(lt::settings_pack::i2p_hostname, I2PAddress().toStdString());
@@ -1681,7 +1682,6 @@ lt::settings_pack SessionImpl::loadLTSettings() const
         settingsPack.set_bool(lt::settings_pack::allow_i2p_mixed, false);
     }
 
-#ifdef QBT_USES_LIBTORRENT2
     // I2P session options
     settingsPack.set_int(lt::settings_pack::i2p_inbound_quantity, I2PInboundQuantity());
     settingsPack.set_int(lt::settings_pack::i2p_outbound_quantity, I2POutboundQuantity());

src/gui/advancedsettings.cpp

@@ -153,7 +153,7 @@ namespace
         PEER_TURNOVER_CUTOFF,
         PEER_TURNOVER_INTERVAL,
         REQUEST_QUEUE_SIZE,
-#ifdef QBT_USES_LIBTORRENT2
+#if defined(QBT_USES_LIBTORRENT2) && TORRENT_USE_I2P
         I2P_INBOUND_QUANTITY,
         I2P_OUTBOUND_QUANTITY,
         I2P_INBOUND_LENGTH,
@@ -325,7 +325,7 @@ void AdvancedSettings::saveAdvancedSettings() const
     session->setPeerTurnoverInterval(m_spinBoxPeerTurnoverInterval.value());
     // Maximum outstanding requests to a single peer
     session->setRequestQueueSize(m_spinBoxRequestQueueSize.value());
-#ifdef QBT_USES_LIBTORRENT2
+#if defined(QBT_USES_LIBTORRENT2) && TORRENT_USE_I2P
     // I2P session options
     session->setI2PInboundQuantity(m_spinBoxI2PInboundQuantity.value());
     session->setI2POutboundQuantity(m_spinBoxI2POutboundQuantity.value());
@@ -839,7 +839,7 @@ void AdvancedSettings::loadAdvancedSettings()
     m_spinBoxRequestQueueSize.setValue(session->requestQueueSize());
     addRow(REQUEST_QUEUE_SIZE, (tr("Maximum outstanding requests to a single peer") + u' ' + makeLink(u"https://www.libtorrent.org/reference-Settings.html#max_out_request_queue", u"(?)"))
             , &m_spinBoxRequestQueueSize);
-#ifdef QBT_USES_LIBTORRENT2
+#if defined(QBT_USES_LIBTORRENT2) && TORRENT_USE_I2P
     m_spinBoxI2PInboundQuantity.setMinimum(1);
     m_spinBoxI2PInboundQuantity.setMaximum(16);
     m_spinBoxI2PInboundQuantity.setValue(session->I2PInboundQuantity());

src/gui/advancedsettings.h

@@ -28,6 +28,8 @@
 
 #pragma once
 
+#include <libtorrent/config.hpp>
+
 #include <QCheckBox>
 #include <QComboBox>
 #include <QLineEdit>
@@ -85,8 +87,11 @@ private:
     QCheckBox m_checkBoxCoalesceRW;
 #else
     QComboBox m_comboBoxDiskIOType;
-    QSpinBox m_spinBoxMemoryWorkingSetLimit, m_spinBoxHashingThreads,
-             m_spinBoxI2PInboundQuantity, m_spinBoxI2POutboundQuantity, m_spinBoxI2PInboundLength, m_spinBoxI2POutboundLength;
+    QSpinBox m_spinBoxMemoryWorkingSetLimit, m_spinBoxHashingThreads;
+#endif
+
+#if defined(QBT_USES_LIBTORRENT2) && TORRENT_USE_I2P
+    QSpinBox m_spinBoxI2PInboundQuantity, m_spinBoxI2POutboundQuantity, m_spinBoxI2PInboundLength, m_spinBoxI2POutboundLength;
 #endif
 
     // OS dependent settings

src/gui/optionsdialog.cpp

@@ -791,10 +791,14 @@ void OptionsDialog::loadConnectionTabOptions()
         m_ui->spinMaxUploadsPerTorrent->setEnabled(false);
     }
 
+#if defined(QBT_USES_LIBTORRENT2) && TORRENT_USE_I2P
     m_ui->textI2PHost->setText(session->I2PAddress());
     m_ui->spinI2PPort->setValue(session->I2PPort());
     m_ui->checkI2PMixed->setChecked(session->I2PMixedMode());
     m_ui->groupI2P->setChecked(session->isI2PEnabled());
+#else
+    m_ui->groupI2P->hide();
+#endif
 
     const auto *proxyConfigManager = Net::ProxyConfigurationManager::instance();
     const Net::ProxyConfiguration proxyConf = proxyConfigManager->proxyConfiguration();
@@ -845,10 +849,12 @@ void OptionsDialog::loadConnectionTabOptions()
     connect(m_ui->textProxyIP, &QLineEdit::textChanged, this, &ThisType::enableApplyButton);
     connect(m_ui->spinProxyPort, qSpinBoxValueChanged, this, &ThisType::enableApplyButton);
 
+#if defined(QBT_USES_LIBTORRENT2) && TORRENT_USE_I2P
     connect(m_ui->textI2PHost, &QLineEdit::textChanged, this, &ThisType::enableApplyButton);
     connect(m_ui->spinI2PPort, qSpinBoxValueChanged, this, &ThisType::enableApplyButton);
     connect(m_ui->checkI2PMixed, &QCheckBox::toggled, this, &ThisType::enableApplyButton);
     connect(m_ui->groupI2P, &QGroupBox::toggled, this, &ThisType::enableApplyButton);
+#endif
 
     connect(m_ui->checkProxyBitTorrent, &QGroupBox::toggled, this, &ThisType::enableApplyButton);
     connect(m_ui->checkProxyBitTorrent, &QGroupBox::toggled, this, &ThisType::adjustProxyOptions);
@@ -881,10 +887,12 @@ void OptionsDialog::saveConnectionTabOptions() const
     session->setMaxUploads(getMaxUploads());
     session->setMaxUploadsPerTorrent(getMaxUploadsPerTorrent());
 
+#if defined(QBT_USES_LIBTORRENT2) && TORRENT_USE_I2P
     session->setI2PEnabled(m_ui->groupI2P->isChecked());
     session->setI2PAddress(m_ui->textI2PHost->text().trimmed());
     session->setI2PPort(m_ui->spinI2PPort->value());
     session->setI2PMixedMode(m_ui->checkI2PMixed->isChecked());
+#endif
 
     auto *proxyConfigManager = Net::ProxyConfigurationManager::instance();
     Net::ProxyConfiguration proxyConf;