/* DoesPasswordMatch()
* Verifies credentials for an account.
*
* Returns: true if verified, false if password doesn't match or account does
* not exist
*/
public static bool DoesPasswordMatch(string user, string pass)
{
string cacheName = GetCacheName(user);
if (Cache.Exists(cacheName))
{
DBAct.UserRecords userData = (DBAct.UserRecords)Cache.Get(cacheName);
return(userData.Pass == pass);
}
return(false);
}
/* GetBalance()
* Determines net balance of the user's account.
*
* Modifies: amount with the value of the user's balance
* Returns: true if retrieved, false if not retrieved
*/
public static bool GetBalance(string user, string pass, ref decimal amount)
{
DBAct.UserRecords userData = null;
if (!AuthUserAndFetchData(user, pass, ref userData))
{
return(false);
}
amount = userData.GetBalance();
return(true);
}
/* TransactionHistory()
* Determines the transaction history of the user.
*
* Modifies: history to store the account's transaction history. Newest items
* will begin at the start of the index.
* Returns: true if retrived, false if not retrieved
*/
public static bool TransactionHistory(string user, string pass, ref string[] history)
{
DBAct.UserRecords userData = null;
if (!AuthUserAndFetchData(user, pass, ref userData))
{
return(false);
}
history = new string[userData.Records.Count];
for (int i = 0; i < userData.Records.Count; i++)
{
history[i] = Convert.ToString(userData.Records.ElementAt(i).Date) + " ... "
+ String.Format("{0,17:0.00}", userData.Records.ElementAt(i).Amount);
}
Array.Reverse(history); //give newest items first
return(true);
}
/* AddTransaction()
* Attempts to add a new transaction to the account. Withdrawals are passed as
* negative amounts. Will fail if insufficient funds are detected.
*
* Returns: true if added, false if not added
*/
public static bool AddTransaction(string user, string pass, decimal amount)
{
string cacheName = GetCacheName(user);
DBAct.UserRecords userData = null;
if (!AuthUserAndFetchData(user, pass, ref userData))
{
return(false);
}
if (userData.GetBalance() + amount < 0)
{
return(false);
}
DateTime date = DateTime.Now;
Transaction newTransaction = CreateNewTransaction(date, amount);
userData.AddTransaction(newTransaction);
Cache.Update(cacheName, userData);
return(true);
}
