/// <summary>
/// Creates a Single Mutation
/// </summary>
/// <param name="account">Account affected by this mutation</param>
/// <param name="previousEventNr">The Event Number of the previous Event.</param>
/// <param name="counterAccount">The Counter Party Account for this mutation</param>
/// <param name="mutationType">Type of mutation example Deposit of Withdrawal</param>
/// <param name="entryType">Credit of Debit</param>
/// <param name="prevBalance">Previous balance of the Account</param>
/// <param name="amount">The Amount mutated</param>
/// <param name="currency">Asset type ex USD</param>
/// <param name="descr2"></param>
/// <returns>Mutation object</returns>
private static Mutation CreateMutation(Mutation lastAccountEvent, Mutation LastCounterAccountEvent, MutationTypes mutationType, MutationEntryTypes entryType, decimal amount, string currency, string descr2 = "", string descr3 = "")
{
// the amount credited will be calculated by the MutationEntryType
var CreditAmount = 0m;
// the amount credited will be calculated by the MutationEntryType
var DebitAmount = 0m;
// New balance will be calculated by the MutationEntryType Dr + and Cr -
var newBalance = 0m;
//this old balance is the new Balance of the previous mutation
var oldBalance = 0m;
// Find the Old Currency balance. If cussency is not there the balance is 0.00
foreach (Balance b in lastAccountEvent.AccountBalances)
{
if (b.Currency == currency)
{
oldBalance = b.NewBalance;
}
}
// generate the default description (goes to descr1)
var descr1 = ($"{mutationType.ToString().Replace('_', ' ')} {entryType.ToString()} {amount} {currency}.");
//Calucate the balance and Debit and Credit amount
switch (entryType)
{
case MutationEntryTypes.Cr:
CreditAmount = amount;
newBalance = oldBalance - amount;
break;
case MutationEntryTypes.Dr:
DebitAmount = amount;
newBalance = oldBalance + amount;
break;
}
// Create counterAccount Information
CounterAccount counterAccount = new CounterAccount
{
AccountHolder = LastCounterAccountEvent.Account.AccountHolder,
AccountNumber = LastCounterAccountEvent.Account.AccountNumber,
AccountType = LastCounterAccountEvent.Account.AccountType,
PreviousEventNumber = LastCounterAccountEvent.EventNumber,
EventNumber = LastCounterAccountEvent.EventNumber + 1,
};
var mutation = new Mutation
{
MutationId = Guid.NewGuid().ToString(),
Account = lastAccountEvent.Account,
CounterAccount = counterAccount,
PreviousEventNumber = lastAccountEvent.EventNumber,
EventNumber = lastAccountEvent.EventNumber + 1,
MutationType = mutationType.ToString(),
Currency = currency.ToUpper(),
AccountBalances = UpdateBalance(lastAccountEvent.AccountBalances, oldBalance, newBalance, currency.ToUpper()),
Cr = CreditAmount,
Dr = DebitAmount,
Description1 = descr1,
Description2 = descr2,
Description3 = descr3
};
return(mutation);
}
/// <summary>
/// Create a new posting
/// </summary>
/// <param name="lastAccountEvent"></param>
/// <param name="LastCounterAccountEvent"></param>
/// <param name="mutationType"></param>
/// <param name="entryType"></param>
/// <param name="amount"></param>
/// <param name="currency"></param>
/// <param name="descr2"></param>
/// <param name="descr3"></param>
/// <returns>Posting object</returns>
public static Posting CreatePosting(Mutation lastAccountEvent, Mutation LastCounterAccountEvent, MutationTypes mutationType, MutationEntryTypes entryType, decimal amount, string currency, string descr2 = "", string descr3 = "")
{
Posting result = new Posting();
Mutation accountEvent = CreateMutation(lastAccountEvent, LastCounterAccountEvent, mutationType, entryType, amount, currency, descr2, descr3);
// Swap CR to DR and Vsa versa before creating a CounteraccountEvent.
MutationEntryTypes CounterEntryType;
if (entryType == MutationEntryTypes.Cr)
{
CounterEntryType = MutationEntryTypes.Dr;
}
else
{
CounterEntryType = MutationEntryTypes.Cr;
}
Mutation CounteraccountEvent = CreateMutation(LastCounterAccountEvent, lastAccountEvent, mutationType, CounterEntryType, amount, currency, descr2, descr3);
// Set the mutation id's in the counterAccounts.
CounteraccountEvent.CounterAccount.MutationId = accountEvent.MutationId;
accountEvent.CounterAccount.MutationId = CounteraccountEvent.MutationId;
result.Mutations[0] = accountEvent;
result.Mutations[1] = CounteraccountEvent;
return(result);
}
