update// added new writer method to filesystem to convert old format to new

src/FileSystem/FileSystem.h

@@ -5,7 +5,8 @@
 #include <QList>
 #include "../Model/ContactItem.h"
 #include "../Crypto/FileEncryption.h"
-
+#include <fstream>
+using json = nlohmann::json;
 class FileSystem
 {
     private:
@@ -16,7 +17,11 @@ class FileSystem
     public:
         static FileSystem* getInstance();
         QList<ContactItem> readContacts(QString file);
-        void writeContacts(QString file, QList<ContactItem> contacts);
+        void writeContacts(QString file, QString data);
+
+        //converter
+        QList<ContactItem> readContactsOldFormat(QString file);
+        void writeContactsOldFormat(QString file, QList<ContactItem> contacts);
         ~FileSystem();
         
 };