/// <summary>
/// Transfers shares of a stock to the specified account.
/// </summary>
/// <param name="accountId">Id of the account that "buys" the shares.</param>
/// <param name="stockId">Id of the stock of which shares are "bought".</param>
/// <param name="sharesCount">Number of shares that should be "bought".</param>
/// <param name="maxShareValue">Maximum value for an individual share; if the current value exceeds this value, an exception will be thrown.</param>
/// <returns>A task that completes when the operation has been completed.</returns>
public async Task BuyShares(int accountId, int stockId, int sharesCount, decimal?maxShareValue)
{
var accountStatus = await _accountTransactionsAggregator.AggregateTransactionsOfAccount(accountId);
var stock = await _entityQuerySource.GetById <Stock>(stockId);
var shareValue = await _stockInfoService.GetCurrentShareValue(stock);
if (shareValue > maxShareValue)
{
throw new Exception("Zu teuer");
}
var total = shareValue * sharesCount;
if (total > accountStatus.Balance)
{
throw new Exception("Zu wenig guthaben");
}
await _entityRepositoryFactory.Use(repository =>
{
repository.Add(new StockTransaction
{
AccountId = accountId,
SharesCount = sharesCount,
ShareValue = shareValue,
TransactionTimestamp = DateTime.UtcNow,
StockId = stockId
});
});
}
/// <summary>
/// Changes the password of the specified account.
/// </summary>
/// <param name="email">E-Mail Address of the account of which to change the password.</param>
/// <param name="newPassword">Password that should be used for the account.</param>
/// <returns>A Task that will complete when the password has been changed.</returns>
public async Task ChangePassword(int accountId, string newPassword)
{
var account = await _entityQuerySource.GetById <Account>(accountId);
var hashedPassword = HashedPassword.CreateFromPlainPassword(newPassword);
await _entityRepositoryFactory.Use(repository =>
{
repository.Change <Account>(account.Id, a =>
{
a.PasswordHash = hashedPassword.Hash;
a.PasswordSalt = hashedPassword.Salt;
});
});
}