Update on main system framework

system/apparatus.cpp

@@ -1,6 +1,84 @@
 #include "apparatus.h"
 
-apparatus::apparatus()
+
-{
+apparatus *apparatus::_instance = nullptr;
+
+void apparatus::open_reading_stream() {
+    this->_bin_file = new QFile("data.bin");
+    this->_bin_file->open(QIODevice::ReadOnly);
+
+    stream.setDevice(_bin_file);
+}
+
+void apparatus::open_writing_stream() {
+    this->_bin_file = new QFile("data.bin");
+    this->_bin_file->open(QIODevice::WriteOnly);
+
+    stream.setDevice(_bin_file);
+}
+
+void apparatus::close_stream() {
+    stream.setDevice(nullptr);
+
+    this->_bin_file->close();
+    delete this->_bin_file;
+    this->_bin_file = nullptr;
+}
+
+apparatus::apparatus() {
+    this->open_reading_stream();
+    this->loadGIDS();
+    this->deserialize_data();
+    this->close_stream();
+}
+
+apparatus::~apparatus() {
+    if (this->_bin_file) {
+        this->_bin_file->flush();
+        this->_bin_file->close();
+        delete this->_bin_file;
+        this->_bin_file = nullptr;
+    }
+}
+
+apparatus& apparatus::instance() {
+    if (apparatus::_instance == nullptr) {
+        apparatus::init();
+    }
+
+    return *apparatus::_instance;
+}
+
+void apparatus::init() {
+    apparatus::_instance = new apparatus();
+}
+
+void apparatus::shutdown() {
+    if (apparatus::_instance != nullptr) {
+        apparatus::_instance->open_writing_stream();
+        apparatus::_instance->writeGIDS();
+        apparatus::_instance->serialize_data();
+        apparatus::_instance->close_stream();
+    }
+}
+
+void apparatus::writeGIDS() {
+    entity_id vgid = vessel_entity::GID();
+    entity_id sgid = storage_entity::GID();
+    this->stream << vgid << sgid;
+}
+
+void apparatus::loadGIDS() {
+    entity_id vgid, sgid;
+    this->stream >> vgid >> sgid;
+    vessel_entity::preloadGlobalId(vgid);
+    storage_entity::preloadGlobalId(sgid);
+}
+
+void apparatus::serialize_data() {
+
+}
+
+void apparatus::deserialize_data() {
 
 }

system/apparatus.h

@@ -1,11 +1,36 @@
 #ifndef APPARATUS_H
 #define APPARATUS_H
 
+#include <QFile>
+#include <QDataStream>
+
 
 class apparatus
 {
+private:
+    static apparatus *_instance;
+
+    QFile _bin_file;
+    QDataStream stream;
+
+    void open_reading_stream();
+    void close_reading_stream();
+
+    void open_writing_stream();
+    void close_writing_stream();
+
+    void writeGIDS();
+    void loadGIDS();
+
+    void serialize_data();
+    void deserialize_data();
+
 public:
     apparatus();
+
+    static apparatus& instance();
+    static void init();
+    static void shutdown();
 };
 
 #endif // APPARATUS_H