public decimal GetBalance()
{
decimal currentBalance = 0.00m;
//This is a 'hacky' implementation.
//In a production system, this would be based on date, not ID
//There would also be cleaner separation between read and write models (think cqrs)
BalanceSnapshot lastSnapshot = GetMostRecentSnapshot();
if (lastSnapshot != null)
{
var trxsSinceSnapshot = AccountRecords.Where(t => t.TransactionID > lastSnapshot.TransactionID);
currentBalance = SumTransactions(trxsSinceSnapshot) + lastSnapshot.Balance;
}
else
{
currentBalance = SumTransactions(AccountRecords);
}
return(currentBalance);
}
public async Task UpdateBalance(BalanceSnapshot snapshot)
{
await Clients.All.SendAsync("UpdateBalance", snapshot);
}
