public decimal GetAccountBalance(string account)
{
using (CAP_EventSourcingEntities entities = new CAP_EventSourcingEntities())
{
DateTime dateOfBusiness = AccountUtility.GetDateOfBusiness(entities);
DateTime snapshotDate = dateOfBusiness - TimeSpan.FromDays(2.0);
return(AccountUtility.GetAccountBalance(account, snapshotDate, dateOfBusiness, entities));
}
}
// TODO 3d: Command is just an insert.
public void Transfer(string fromAccount, string toAccount, decimal amount)
{
using (CAP_EventSourcingEntities entities = new CAP_EventSourcingEntities())
{
DateTime dateOfBusiness = AccountUtility.GetDateOfBusiness(entities);
DateTime snapshotDate = dateOfBusiness - TimeSpan.FromDays(2.0);
decimal accountBalance = AccountUtility.GetAccountBalance(fromAccount, snapshotDate, dateOfBusiness, entities);
if (accountBalance < amount)
{
throw new ApplicationException("Insufficient funds");
}
entities.AddToTransfers(new Transfer()
{
From = fromAccount,
To = toAccount,
Amount = amount,
DateOfBusiness = dateOfBusiness
});
entities.SaveChanges();
}
}