Add Snapshot feature

Add ChangeDatabase() method
Add GetDatabaseHome() and GetDatabaseFile()

src/model/Database.hpp

@@ -24,6 +24,7 @@
 
 #include <QSqlDatabase>
 #include <QDate>
+#include <QDir>
 
 #include <controller/KissCount.hpp>
 #include "model.hpp"
@@ -91,6 +92,9 @@ public:
 
     Database(const char* filename, KissCount* kiss);
 
+    static QString GetDatabaseHome() { return QDir::home().path() + BDD_PATH; }
+    static QString GetDatabaseFile() { return QString(BDD_FILE); }
+
     std::list<QString> GetUsers();
     bool IsValidUser(const QString& user, const QString& password);
 
@@ -154,6 +158,8 @@ public:
 
     void GetHistory(int month, int year, QStringList& list);
 
+    bool ChangeDatabase(QString filename);
+
 /* Database Update */
     
     void CheckDatabaseVersion();