/// <summary>
/// Retrieve an accounts ledger for a given accountId.
/// This talks with the data access layer.
/// </summary>
/// <param name="accountId">The account to retrieve ledger of.<param>
/// <returns>Returns an accounts ledger if found or null otherwise.</returns>
public async Task <AccountLedger> GetAccountLedgerAsync(int accountId)
{
// Parallel async calls to save time
var accountTask = _accountRepository.GetAccountAsync(accountId);
var ledgerTask = _ledgerRepository.GetLedgerByAccountAsync(accountId);
await Task.WhenAll(accountTask, ledgerTask).ConfigureAwait(false); // Avoid deadlocks
var account = await accountTask;
var ledger = await ledgerTask;
// Map results to return type
return(account == null
? null
: new AccountLedger
{
Account = account.Id,
Balance = account.Balance,
PaymentHistory = ledger == null || !ledger.Any()
? new List <Payment>()
: ledger.Select(l => new Payment
{
Id = l.Id,
Date = l.Date,
Amount = l.Amount,
Status = l.Status,
ClosedReason = l.ClosedReason
})
});
}