qml: Add "-prune" settings to OptionsQmlModel class

Github-Pull: #207
Rebased-From: 93f78f8

Author: hebasto

src/qml/BitcoinApp/CMakeLists.txt

@@ -61,4 +61,6 @@ target_link_libraries(bitcoin_qml
   PUBLIC
     Qt6::Widgets
     Qt6::Quick
+  PRIVATE
+    univalue
 )

src/qml/BitcoinApp/options_model.cpp

@@ -4,9 +4,43 @@
 
 #include <qml/BitcoinApp/options_model.h>
 
+#include <common/args.h>
+#include <common/settings.h>
 #include <interfaces/node.h>
+#include <qt/guiconstants.h>
+#include <qt/optionsmodel.h>
+#include <univalue.h>
+
+#include <cassert>
 
 OptionsQmlModel::OptionsQmlModel(interfaces::Node& node)
     : m_node{node}
 {
+    int64_t prune_value{SettingToInt(m_node.getPersistentSetting("prune"), 0)};
+    m_prune = (prune_value > 1);
+    m_prune_size_gb = m_prune ? PruneMiBtoGB(prune_value) : DEFAULT_PRUNE_TARGET_GB;
+}
+
+void OptionsQmlModel::setPrune(bool new_prune)
+{
+    if (new_prune != m_prune) {
+        m_prune = new_prune;
+        m_node.updateRwSetting("prune", pruneSetting());
+        Q_EMIT pruneChanged(new_prune);
+    }
+}
+
+void OptionsQmlModel::setPruneSizeGB(int new_prune_size_gb)
+{
+    if (new_prune_size_gb != m_prune_size_gb) {
+        m_prune_size_gb = new_prune_size_gb;
+        m_node.updateRwSetting("prune", pruneSetting());
+        Q_EMIT pruneSizeGBChanged(new_prune_size_gb);
+    }
+}
+
+common::SettingsValue OptionsQmlModel::pruneSetting() const
+{
+    assert(!m_prune || m_prune_size_gb >= 1);
+    return m_prune ? PruneGBtoMiB(m_prune_size_gb) : 0;
 }

src/qml/BitcoinApp/options_model.h

@@ -5,6 +5,8 @@
 #ifndef BITCOIN_QML_OPTIONS_MODEL_H
 #define BITCOIN_QML_OPTIONS_MODEL_H
 
+#include <common/settings.h>
+
 #include <QObject>
 
 namespace interfaces {
@@ -15,12 +17,29 @@ class Node;
 class OptionsQmlModel : public QObject
 {
     Q_OBJECT
+    Q_PROPERTY(bool prune READ prune WRITE setPrune NOTIFY pruneChanged)
+    Q_PROPERTY(int pruneSizeGB READ pruneSizeGB WRITE setPruneSizeGB NOTIFY pruneSizeGBChanged)
 
 public:
     explicit OptionsQmlModel(interfaces::Node& node);
 
+    bool prune() const { return m_prune; }
+    void setPrune(bool new_prune);
+    int pruneSizeGB() const { return m_prune_size_gb; }
+    void setPruneSizeGB(int new_prune_size);
+
+Q_SIGNALS:
+    void pruneChanged(bool new_prune);
+    void pruneSizeGBChanged(int new_prune_size_gb);
+
 private:
     interfaces::Node& m_node;
+
+    // Properties that are exposed to QML.
+    bool m_prune;
+    int m_prune_size_gb;
+
+    common::SettingsValue pruneSetting() const;
 };
 
 #endif // BITCOIN_QML_OPTIONS_MODEL_H