initial commit

client/core/persistence/PersistentBinaryObject.cpp

@@ -0,0 +1,57 @@
+#include "persistence/PersistentBinaryObject.h"
+
+#include <QDataStream>
+#include <QDir>
+#include <QFile>
+#include <QFileInfo>
+
+namespace core {
+
+bool PersistentBinaryObject::saveToFile(const QString& absolutePath) const {
+    if (absolutePath.isEmpty()) {
+        return false;
+    }
+    const auto parent = QFileInfo(absolutePath).absolutePath();
+    if (!QFileInfo(parent).exists()) {
+        QDir().mkpath(parent);
+    }
+
+    const QString tmpPath = absolutePath + QStringLiteral(".tmp");
+    QFile f(tmpPath);
+    if (!f.open(QIODevice::WriteOnly | QIODevice::Truncate)) {
+        return false;
+    }
+
+    QDataStream ds(&f);
+    ds.setVersion(QDataStream::Qt_5_15);
+    ds << quint32(recordMagic()) << quint32(recordFormatVersion());
+    writeBody(ds);
+
+    f.close();
+    if (f.error() != QFile::NoError) {
+        QFile::remove(tmpPath);
+        return false;
+    }
+    QFile::remove(absolutePath);
+    return QFile::rename(tmpPath, absolutePath);
+}
+
+bool PersistentBinaryObject::loadFromFile(const QString& absolutePath) {
+    QFile f(absolutePath);
+    if (!f.open(QIODevice::ReadOnly)) {
+        return false;
+    }
+
+    QDataStream ds(&f);
+    ds.setVersion(QDataStream::Qt_5_15);
+
+    quint32 magic = 0;
+    quint32 version = 0;
+    ds >> magic >> version;
+    if (ds.status() != QDataStream::Ok || magic != recordMagic() || version != recordFormatVersion()) {
+        return false;
+    }
+    return readBody(ds);
+}
+
+}  // namespace core