Index: sources/storage/FileHandler.cpp
===================================================================
diff -u -r340cae5888596d927601687476618d0ede343a35 -r5687815256ae070a9a207107088e3f72dd464da0
--- sources/storage/FileHandler.cpp	(.../FileHandler.cpp)	(revision 340cae5888596d927601687476618d0ede343a35)
+++ sources/storage/FileHandler.cpp	(.../FileHandler.cpp)	(revision 5687815256ae070a9a207107088e3f72dd464da0)
@@ -1,13 +1,13 @@
 /*!
  *
- * Copyright (c) 2020-2023 Diality Inc. - All Rights Reserved.
+ * Copyright (c) 2020-2024 Diality Inc. - All Rights Reserved.
  * \copyright
  * THIS CODE MAY NOT BE COPIED OR REPRODUCED IN ANY FORM, IN PART OR IN
  * WHOLE, WITHOUT THE EXPLICIT PERMISSION OF THE COPYRIGHT OWNER.
  *
  * \file    FileHandler.cpp
  * \author  (last)      Behrouz NematiPour
- * \date    (last)      18-Jul-2023
+ * \date    (last)      23-Apr-2024
  * \author  (original)  Behrouz NematiPour
  * \date    (original)  26-Aug-2020
  *
@@ -19,12 +19,15 @@
 #include <QProcess>
 #include <QDate>
 #include <QStorageInfo>
+#include <QCryptographicHash>
 
 
 // Project
 // #include "Logger.h" // logger should not be used in this class.
 #include "StorageGlobals.h"
 
+extern QString gStandard_tmp;
+
 // namespace
 using namespace Storage;
 
@@ -95,7 +98,7 @@
 {
     QFile file(vFileName);
     if (! file.open(QFile::Text | QFile::ReadOnly)) {
-        QString   msg = QString("Cannot open file for write (%1). Possible corrupted file system").arg(vFileName);
+        QString   msg = QString("Cannot open file for read (%1). Possible corrupted file system").arg(vFileName);
         // here cannot use LOG_XXXX because if the folder cannot be created then the log cannot be written.
         errOut   (msg);
         return false;
@@ -111,29 +114,20 @@
 }
 
 /*!
- * \brief   FileHandler::read
- * \details reads the provided filename's JSON content into the vContent variable.
- * \param   vFileName - Source file name
- * \param   vContent  - The content of the file which will be written to when done.
- * \return  false if file cannot be read or parsed
+ * \brief   FileHandler::backupFile
+ * \details Calls the gzip command
+ *          the file is compressed and will be deleted by gzip
+ *          the destination file is determined by gzip
+ * \param   vSource - file to be compressed
+ * \return  non-zero if successfull.
  */
-bool FileHandler::read(const QString &vFileName, QJsonObject &vContent, QJsonParseError *error)
+int FileHandler::backupFile(const QString &vSource)
 {
-    QFile file(vFileName);
-    if (! file.open(QFile::Text | QFile::ReadOnly)) {
-        errOut(QObject::tr("Cannot open file for read (%1). Possible corrupted file system.").arg(vFileName));
-        return false;
-    }
-    QTextStream in(&file);
-    QString content = in.readAll();
-    QJsonParseError jsonParseError;
-    QJsonDocument doc = QJsonDocument::fromJson(content.toUtf8(), &jsonParseError);
-    if (jsonParseError.error) {
-        if (error) *error = jsonParseError;
-        return false;
-    }
-    vContent = doc.object();
-    return true;
+    QString cmd = "gzip";
+    QStringList arguments;
+    arguments << vSource;
+    int result = QProcess::execute(cmd, arguments);
+    return result;
 }
 
 /*!
@@ -304,7 +298,7 @@
     static bool tested  = false;
     if ( tested )  return ok;
 
-    QString tmp     = Storage::Standard_tmp;
+    QString tmp             = gStandard_tmp;
     QString tmpTestFolder   = tmp + "tmp_test_folder" ;
     QString tmpTestFile     = tmp + "tmp_test_file"   ;
     QString tmpTestContent  =       "tmp_test_content";
@@ -462,3 +456,22 @@
     QFileInfo fileInfo(vFilePath);
     return fileInfo.canonicalFilePath() != fileInfo.filePath();
 }
+
+/*!
+ * \brief   FileHandler::sha256sum
+ * \param   vFileName   - the file name including path to generate the sha256sum for
+ * \param   vOk         - if used will contain the success/true, fail/false of the checksum generation
+ * \return  The checksum result in hex sting.
+ */
+QString FileHandler::sha256sum(QString vFileName, bool *vOk) {
+    bool ok = true;
+    QByteArray shasum;
+    QCryptographicHash hash(QCryptographicHash::Sha256);
+    QFile file(vFileName);
+    if ( ! file.open(QIODevice::ReadOnly)) { ok = false; goto lOut; }
+    hash.addData(&file);
+    shasum = hash.result().toHex();
+lOut:
+    if (vOk) *vOk = ok;
+    return shasum;
+}