update// implemented dump method to each datastoretype

src/DataStore/ContactDataStore.h

@@ -0,0 +1,34 @@
+#ifndef CONTACTDATASTORE_H
+#define CONTACTDATASTORE_H
+#include "../Model/ContactItem.h"
+#include <string>
+using json = nlohmann::json;
+
+class ContactDataStore
+{
+    private:
+        static bool instanced;
+        static ContactDataStore* instance;
+        std::map<QString, ContactItem> data;
+        ContactDataStore()
+        {
+
+        }
+
+    public:
+        static ContactDataStore* getInstance();
+        void clear();
+        void setData(QString key, ContactItem value);
+        ContactItem getData(QString key);
+        QString dump();
+
+        ~ContactDataStore()
+        {
+            ContactDataStore::instanced = false;
+            ContactDataStore::instance = nullptr;
+        }
+};
+
+
+
+#endif