public static void EnsureSeedData(this CoinifyWebContext context)
{
var(coinSizes, coins, notes, users, atm, currencyDictionary) = CreateEntitiesArrays();
if (context.Database.GetPendingMigrations().Count() > 0)
{
context.Database.Migrate();
}
if (!context.CoinSize.Any())
{
context.CoinSize.AddRange(coinSizes);
}
if (!context.Coin.Any())
{
context.Coin.AddRange(coins);
}
if (!context.Note.Any())
{
context.Note.AddRange(notes);
}
if (!context.AutomatedTellerMachine.Any())
{
context.CurrencyDictionary.Add(currencyDictionary);
context.AutomatedTellerMachine.Add(atm);
}
if (!context.User.Any())
{
context.User.AddRange(users);
}
context.SaveChanges();
}
public static CurrencyDictionary WithdrawFromAtm(User user, AutomatedTellerMachine atm, int amount, CoinifyWebContext context = null)
{
var curDict = atm.CurrencyDictionary;
var ret = new CurrencyDictionary()
{
CoinDictionary = new Dictionary <Coin, int>(),
NoteDictionary = new Dictionary <Note, int>()
};
if (user.Balance - amount < 0)
{
throw new InsufficentFundsException($"User {user.UserId} has insuficient funds to withdraw ${amount}");
}
user.Balance -= amount;
var validMoney = GenerateValidMoneyDictionary(curDict);
foreach (var kvp in validMoney.ToList())
{
while (validMoney[kvp.Key] != 0)
{
if ((amount - kvp.Key.Value) < 0)
{
break;
}
amount -= kvp.Key.Value;
validMoney[kvp.Key]--;
if (kvp.Key is Note)
{
var note = kvp.Key as Note;
if (ret.NoteDictionary.ContainsKey(note))
{
ret.NoteDictionary[note]++;
}
else
{
ret.NoteDictionary[note] = 1;
}
curDict.NoteDictionary[note]--;
}
else if (kvp.Key is Coin)
{
var coin = kvp.Key as Coin;
if (ret.CoinDictionary.ContainsKey(coin))
{
ret.CoinDictionary[coin]++;
}
else
{
ret.CoinDictionary[coin] = 1;
}
curDict.CoinDictionary[coin]--;
}
else
{
break;
}
}
}
if (amount > 0)
{
throw new
InsufficientChangeException($"There is no change in ATM {atm.AutomatedTellerMachineId} to withdraw ${amount}");
}
if (context != null)
{
context.Update(user);
context.Update(atm);
context.SaveChanges();
}
return(ret);
}