public DataItemVehicle GetActiveProfile()
{
DataItemVehicle result;
if (IsMetaEmpty())
{
if (!IsVehicleEmpty())
{
// upgrade from old database
result = GetFirstVehicle();
}
else
{
// empty database -> create and store default item
int id = SaveVehicle(DataItem.CreateDefaultVehicle());
result = GetVehicle(id);
}
// create meta table
SaveActiveProfile(result);
}
else
{
// the meta table has only one entry at any time -> get first
DataItemMeta meta = GetMeta();
result = GetVehicle(meta.ActiveProfile);
}
return(result);
}
public static DataItemMeta CreateDefaultMeta()
{
DataItemMeta d = new DataItemMeta
{
Version = 0,
ActiveProfile = 0
};
return(d);
}
public int UpdateMeta(DataItemMeta item)
{
int result = 0;
lock (locker)
{
Debug.LogToFileMethod("item: " + item.Id);
result = database.Update(item);
}
return(result);
}
public int SaveMeta(DataItemMeta item)
{
int result = 0;
if (IsMetaEmpty()) // the meta table shall have only one entry at all time
{
lock (locker)
{
Debug.LogToFileMethod("item: " + item.Id);
result = database.Insert(item);
}
}
return(result);
}
public void SaveActiveProfile(DataItemVehicle item)
{
lock (locker)
{
Debug.LogToFileMethod("item: " + item.Model);
if (IsMetaEmpty())
{
// empty database -> create and store default meta item
SaveMeta(DataItem.CreateDefaultMeta());
}
// the meta table always has one entry only -> get first
DataItemMeta meta = GetMeta();
// update active profile
meta.ActiveProfile = item.Id;
UpdateMeta(meta);
}
}